AC Power
For Business-Critical Continuity
Liebert NX™
User Manual
50 and 60 Hz, 30-200kVA, 400V
TABLE OF CONTENTS
1.0
SINGLE MODULE UPS INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2
Preliminary Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3
Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3.1
1.3.2
1.3.3
1.4
Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.1
1.4.2
1.4.3
1.4.4
1.4.5
1.4.6
1.4.7
1.4.8
1.4.9
1.5
Rectifier and Bypass Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
External Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
UPS Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Cable Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Control Cables and Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.7.1
1.8
5
5
5
5
6
6
6
6
6
Power Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.6.1
1.7
System Cabinets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30 to 40kVA UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
60-200kVA UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Moving the Cabinets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clearances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Final Positioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Floor Anchoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cable Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External Protective Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.5.1
1.5.2
1.5.3
1.6
UPS Room . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
External Battery Room . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Monitor Board Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Dry Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.8.1
1.8.2
1.8.3
1.8.4
1.8.5
1.8.6
Input Dry Contacts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance Bypass Cabinet Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External Circuit-Breaker Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Dry Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Emergency Power Off Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External Bypass Switch Interlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12
13
13
14
14
16
2.0
BATTERY INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.2
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.3
Battery Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.3.1
2.3.2
2.3.3
2.3.4
2.3.5
2.3.6
2.3.7
2.3.8
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Breaker Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Moving the Battery Cabinets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cable Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Arrangement Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
i
18
19
19
19
19
20
20
21
2.4
Battery Power Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
2.4.1
2.4.2
2.4.3
2.4.4
Connection Principles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fitting the Batteries. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery Room Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
38
38
38
38
2.5
Battery Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
2.6
Battery Circuit Breaker Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
2.6.1
Battery Temperature Sensor—Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
3.0
UPS MULTI-MODULE INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
3.1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
3.2
Paralleled UPS Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
3.2.1
3.2.2
3.2.3
3.2.4
3.3
46
47
47
48
Hot-Standby UPS Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
3.3.1
3.3.2
3.3.3
3.4
Cabinet Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External Protective Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cabinet Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
External Protective Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Power Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Dual Bus System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
3.4.1
3.4.2
3.4.3
3.4.4
3.4.5
Cabinet Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External Protective Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control Wires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extended Dual Bus Synchronization Option (DBS Interface Box) . . . . . . . . . . . . . . . . . . . . .
50
50
50
51
51
4.0
EXTERNAL OPTIONAL CABINETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
4.1
External Maintenance Bypass Cabinets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
4.2
Interlock with UPS Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
4.3
Isolation Transformer Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
4.4
Top Cable Entry Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
5.0
INSTALLATION DRAWINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
6.0
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
6.1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
6.1.1
6.1.2
6.1.3
6.1.4
6.1.5
6.1.6
6.2
Split-Bypass Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Static Transfer Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery Circuit Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery Temperature Compensation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Redundant Control Power Supply Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Socket Outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
76
76
76
76
76
76
Multi Module UPS—1+N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
6.2.1
6.2.2
Features of NX Multi-Module UPS Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Requirements for Paralleling of UPS Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
ii
6.3
Modes of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
6.3.1
6.3.2
6.3.3
6.3.4
6.3.5
6.3.6
6.3.7
6.3.8
6.3.9
6.3.10
6.4
Normal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery Mode (Stored Energy Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Auto-Restart Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bypass Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance Mode (Manual Bypass) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ECO Mode (Single UPS Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parallel Redundancy Mode (System Expansion) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hot-Standby Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Frequency Converter Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Source Share Mode (Co-Generation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
78
78
78
79
79
79
79
79
79
79
Battery Management—Set During Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
6.4.1
6.4.2
Normal Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Advanced Functions (Software Settings Performed by the Commissioning Engineer) . . . . . 80
6.5
Battery Protection (settings by commissioning engineer) . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
7.0
OPERATING PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
7.1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
7.2
Startup in Normal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
7.3
Startup into ECO Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
7.4
Battery Test Mode Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
7.4.1
7.5
Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
UPS Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
7.5.1
UPS Self-Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
7.6
Maintenance Bypass Procedure and UPS Shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
7.7
Isolation of One Module in a Multi-Module System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
7.7.1
7.7.2
Multi-Module Systems With External Output CB1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Multi-Module System Without External Output Circuit Breaker 1 . . . . . . . . . . . . . . . . . . . . 87
7.8
Insertion of One Module in a Multi-Module System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
7.9
Shutdown Procedure—Complete UPS and Load Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . 89
7.10
Emergency Shutdown With EPO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
7.11
Reset After Shutdown for Emergency Stop (EPO Action) or Other Conditions . . . . . . . . . . 90
7.12
Auto Restart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
7.13
Language Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
7.14
Changing the Current Date and Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
7.15
Command Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
8.0
OPERATOR CONTROL PANEL AND DISPLAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
8.1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
8.1.1
8.1.2
8.1.3
8.1.4
8.1.5
8.2
Mimic Power Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audible Alarm (Buzzer) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Direct Access Push Buttons (Keys) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LCD Monitor and Menu keys. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Detailed Description of Menu Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
93
93
94
94
96
All Status and Event Messages Displayed on the UPS Front Panel. . . . . . . . . . . . . . . . . . . 98
iii
8.3
Prompt (Pop-Up) Windows. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
8.4
Dynamic Energy Flow Chart and UPS Help Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
8.5
Default Screen Saver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
9.0
OPTIONS—FOR ASSEMBLY INSIDE THE UPS CABINET . . . . . . . . . . . . . . . . . . . . . . . . . . 105
9.1
Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
9.1.1
9.1.2
9.1.3
9.1.4
9.1.5
9.1.6
9.1.7
9.1.8
9.2
Redundant Back-Feed Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seismic Anchors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Degree of Protection for the UPS Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery Start Facility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bypass Current Sharing Inductors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery Ground Fault Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing Dust Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Redundant Fan for Power Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
105
105
105
105
106
108
109
109
Communication and Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
9.2.1
9.2.2
9.2.3
9.2.4
9.2.5
OC Web Card - SNMP/HTTP Network Interface Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Relay Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Multiport-4 Card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OC485 Web Card – Modbus, Jbus, IGM Net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Alarm Monitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
111
112
113
114
114
10.0
TECHNICAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
10.1
Conformity and Standards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
iv
FIGURES
Figure i
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
Figure 16
Figure 17
Figure 18
Figure 19
Figure 20
Figure 21
Figure 22
Figure 23
Figure 24
Figure 25
Figure 26
Figure 27
Figure 28
Figure 29
Figure 30
Figure 31
Figure 32
Figure 33
Figure 34
Figure 35
Figure 36
Figure 37
Figure 38
Figure 39
Figure 40
Figure 41
Figure 42
Figure 43
Figure 44
Figure 45
Figure 46
Model number nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
Residual current circuit breakers (RCCB) symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Monitoring board (U2) auxiliary terminal block detail. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Input dry contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Output dry contacts and EPO wiring for firmware before M162 . . . . . . . . . . . . . . . . . . . . . . . . . . 14
EPO wiring for firmware M200 or later . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Narrow battery cabinet with top and bottom cable entry locations. . . . . . . . . . . . . . . . . . . . . . . . 21
Narrow battery cabinet with top cable entry location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Wide battery cabinet with top and bottom cable entry locations . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Wide battery cabinet with bottom cable entry location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Wide battery cabinet with fuse or optional circuit breaker locations . . . . . . . . . . . . . . . . . . . . . . 25
Large battery cabinet dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Large battery cabinet with fuse or optional circuit breaker locations . . . . . . . . . . . . . . . . . . . . . . 27
SENXA0NBCN4LCB.eps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
SENXA0NBCN4LF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
SENXA0NBCN5LCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
SENXA0NBCN5LF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
SENXA0NBCWXX3LCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
SENXA0NBCWXX3LF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
SENXA0NBCWXX4LCB_2x4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
SENXA0NBCWXX4LCB_4x2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
SENXA0NBCWXX4LF_2x4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
SENXA0NBCWXX4LF_4x2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Battery room design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Battery circuit breaker box—30-120kVA and 140-200kVA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Battery circuit breaker box connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Single temperature sensor and monitor board—U2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Multiple temperature sensors, battery circuit breaker box and UPS module. . . . . . . . . . . . . . . . 44
Emergency power off connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Typical 1+N system block diagram with common input supply, with separate batteries
and optional output / bypass distribution panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Dry contacts, multiple UPS modules with distribution panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Connection of 1+N system parallel control cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Hot standby configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Typical dual bus system configuration with static transfer switch and Load Bus Synch . . . . . . 50
Connections of a typical dual bus system utilising Load Bus Synch . . . . . . . . . . . . . . . . . . . . . . . 51
External maintenance bypass cabinet with separate bypass input. . . . . . . . . . . . . . . . . . . . . . . . 52
Equipment arrangement—UPS, battery cabinet and top-entry Isolation Transformer
Cabinet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Single input external isolation transformer cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Dual input external isolation transformer cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Output external isolation transformer cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
General arrangement—30-40kVA UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Front view, door open30-40kVA NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Cable terminal layout—30-40kVA NX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Location of parallel logic board M3 and options—30-40kVA NX . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Internal battery layout and connections—30-40kVA NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
General arrangement—60-80kVA NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
v
Figure 47
Figure 48
Figure 49
Figure 50
Figure 51
Figure 52
Figure 53
Figure 54
Figure 55
Figure 56
Figure 57
Figure 58
Figure 59
Figure 60
Figure 61
Figure 62
Figure 63
Figure 64
Figure 65
Figure 66
Figure 67
Figure 68
Figure 69
Figure 70
Figure 71
Figure 72
Figure 73
Figure 74
Figure 75
Figure 76
Figure 77
Figure 78
Figure 79
Figure 80
Front view doors open—60-80kVA NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Cable terminal layout—60-80kVA NX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
General arrangement—100-120kVA NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Front view, door open—100-120kVA NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Parallel logic board location—100-120kVA NX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Cable terminal layout—100-120kVA NX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
General arrangement—140-200kVA NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Front view, door open—140-200kVA NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Parallel logic board location—140-200kVA NX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Cable terminal layout—140-200kVA NX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Optional external Maintenance Bypass Cabinet, 600mm wide . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Optional external Maintenance Bypass Cabinet, 800mm wide . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Optional External Maintenance Bypass Cabinet, 850mm wide . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Cabling diagram, 30-200kVA, MBP-T cabinet, configuration 1.1.1 . . . . . . . . . . . . . . . . . . . . . . . . 72
Cabling diagram, 30-200kVA, MBP-T cabinet, configuration 1.1.3 . . . . . . . . . . . . . . . . . . . . . . . . 73
Cabling diagram, 30-200kVA, MBP-T cabinet, configuration 1.1.5 . . . . . . . . . . . . . . . . . . . . . . . . 74
Single unit block diagram with split-bypass input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
1+N multi-module UPS with external maintenance bypass switch . . . . . . . . . . . . . . . . . . . . . . . 77
Example of configuration for single UPS with external Maintenance Bypass Cabinet . . . . . . . . 85
Typical 1+N system block diagram with common input supply, with separate batteries
and optional output / bypass distribution panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
UPS control and display panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Graphic LCD monitor windows and keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Menu tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Help screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Default screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Battery Start Option for UPS with external battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Bypass current sharing inductances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Battery ground fault detection set connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Replacing the dust filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Communication bays and cable location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
OC Web Card data summary window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
OC Web Card battery data summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
SiteNet MultiPort4 Intellislot pin configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
OC485 Web card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
vi
TABLES
Table 1
Table 2
Table 3
Table 4
Table 5
Table 6
Table 7
Table 8
Table 9
Table 10
Table 11
Table 12
Table 13
Table 14
Table 15
Table 16
Table 17
Table 18
Table 19
Table 20
Table 21
Table 22
Table 23
Table 24
Table 25
Table 26
Table 27
Table 28
Table 29
Table 30
Table 31
Table 32
Table 33
Table 34
Table 35
Table 36
Table 37
Table 38
Maximum steady state AC and DC currents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Distance from floor to connection point on the equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Input dry contacts at X3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Maintenance bypass cabinet interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
External circuit-breaker interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Output dry contact relays for firmware before M162 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
EPO input contact relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Dimensions and weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
UPS-circuit breaker configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Battery circuit breaker box legend. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Battery control label description (X102) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
UPS control and display panel components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Rectifier indicator—1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Battery indicator—2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Bypass indicator—3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Inverter indicator—4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Load indicator—5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Status (Alarm) indicator—6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Audible alarm key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Menu key Icons and their meaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
UPS system window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Descriptions of UPS menus and data window items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
UPS messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Prompt windows, meanings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Seismic anchor sizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Bypass current sharing inductors-dimensions, values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Dry contact fault alarm signal is available for remote monitoring . . . . . . . . . . . . . . . . . . . . . . . 108
Relay Card pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
SiteNet MultiPort4 Intellislot pin assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
NX communication options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Compliance with European, international standards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Environmental characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Efficiency, AC/AC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Rectifier AC input (mains) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Intermediate DC circuit, battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Inverter output to critical load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Bypass input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
vii
Dear Customer:
Please allow us to congratulate you on choosing a Liebert manufactured Uninterruptible Power System.
If this is your first Liebert UPS, we cordially welcome you to a lifetime relationship of after-sales support
designed to keep your Liebert UPS and your systems permanently at their peak performance.
If you already own and use a Liebert UPS, then we are doubly honoured by your decision to continue this
valued relationship.
Our philosophy is reflected in our mission statement “Keeping Business in Business,” and with this we strive
to contribute to the growth & success of your business.
Please give us your valued feedback to help us realise our mission.
EMERSON NETWORK POWER
viii
Figure i
Model number nomenclature
NXa
0
A0
200
U
Feature Set for Region
Input &
Output
Voltage
A0 - EMEA
B0 - Aust/NZ
Revision
to Base
Unit
50/60Hz
Voltage
C0 - Japan
D0 - China
E0 - Latin Amer
NX Product Line
Output kVA
Code
220/380
F
230/400
U
240/415
G
F0 - Other
UPS Single Module
Liebert NXa UPS module ratings:
30 & 40kVA (with internal battery)
60, 80, 100, 120, 140, 160, 200kVA (without internal battery)
Example: NXA0A0200U =
200kVA module for Europe and Middle East, 400V/230V output
Options
Model Identification
Narrow battery cabinet
NXA0BCN
Wide battery cabinet
NXA0BCW
Battery Circuit Breaker Box
NXA0BCB
Note
Specify: UPS kVA rating,
3, 4 or 5-shelves
fuse or circuit breaker protection
Specify UPS kVA rating
Battery Start Kit
NXA0UFXBB
—
Battery Ground Fault detection kit
NXA0UFXBGF
—
Battery temperature probe (for external battery)
NXA0UFXBTS
—
Maintenance bypass cabinet (separate bypass input)
NXA0MBX
Specify total system kVA
Transformer cabinet
NXA0TCX
Specify UPS kVA & I/O Voltage
Fan Redundancy kit
NXA0UFXRF
Specify UPS kVA rating
Seismic Anchor kit
NXA0UFXSAN
—
Bypass current sharing inductance
NXA0UFXBK
—
Dual bus control cable 05-10-15 metres
NXA0UFXD
Specify length in metres
Parallel control cable kit 05-10-15 metres
NXA0UFXP
Specify length in metres
Relay Card (On Bat, Bat Low, On Byp, Sum, UPS Fail)
Relay Card 4 (4 sets On Bat, bat Low)
Webbrowser/TCPIP/SNMP Card
Jbus/Modbus Card
RELAYCARD-INT
MULTIPORT 4
OCWEB-LB
OC485CARD
Intellislot plug-in cards—3 slots available.
RAM - Remote Alarm Monitor
NXA0CFXRAM
Requires RELAYCARD-INT
Modem card
NXA0CFXMOD
—
Large Battery Cabinet
NXA0NBCL
—
Maintenance bypass cabinet (separate bypass input)
NXA0NMBX
—
Transformer cabinet
NXA0NTCX
—
Air Filter (One Filter)
NXA0UFXARF
—
Dual Bus Extension Kit 50-150 Meters
NXXXXMLBSKIT
(XXX: 050 or 150)- 'Specify Length in metres.
Used for extension in length or dual bus
arrangement between Nx and non-Nx
sources'
Individual Battery Monitoring
BDS 40 or BDS 256
Specify number of blocks. Consult Emerson
Network Power representatives for complete
configuration
ix
x
SAFETY PRECAUTIONS
This manual contains information concerning the installation and operation of this Emerson Network
Power Liebert NX Uninterruptible Power System (UPS).
This manual should be read before commencing installation.
The UPS must be commissioned and serviced by an engineer approved by the manufacturer (or
agent).
Failure to do so could result in personnel safety risk, equipment malfunction and invalidation of warranty.
The Liebert NX has been designed for Commercial/Industrial use only, and is not recommended for
use in life support applications.
This is a low emission CLASS A Uninterruptible Power System (UPS) product. In a residential environment, this product may nevertheless cause radio interference, in which case, the user may be
required to take additional measures.
Conformity and Standards
This equipment complies with CE directives 73/23 & 93/68 (LV Safety) and 89/336 (EMC), with Australia and New Zealand EMC Framework (C-Tick) and with the following product standards for Uninterruptible Power System (UPS).
• EN / IEC / AS 62040-1-1—General and safety requirements for use in operator access area
• EN / IEC / AS 62040-2—EMC requirements; Class A compliant
• EN / IEC / AS 62040-3—Performance requirements and test methods
For more details, see 10.0 - Technical Specifications
Continued compliance requires installation in accordance with these instructions and the use of manufacturer approved accessories only.
!
WARNING
High Leakage Current
EARTH CONNECTION IS ESSENTIAL BEFORE CONNECTING THE INPUT SUPPLY.
Earth leakage current exceeds 3.5 mA and is less than 1000 mA for 30-80kVA, less than
2000mA for 100-120kVA. models and less than 2500mA for 140-200kVA models.
Transient and steady-state earth leakage currents, which may occur when starting the
equipment, should be taken into account when selecting instantaneous RCCB or RCD devices.
Residual Current Circuit Breakers (RCCBs) must be selected sensitive to DC unidirectional
pulses (class A) and insensitive to transient current pulses.
Note also that the earth leakage currents of the load will be carried by this RCCB or RCD.
This equipment must be earthed in accordance with the local electrical code of practice.
!
WARNING
Back-Feed Protection Notice
This UPS is fitted with a voltage-free contact closure signal for use with an external
automatic disconnect device (supplied by others) to protect against back-feeding voltage into
the bypass input. If this signal is not used by the installer, a label must be added at the
external bypass input disconnect device to warn service personnel that the circuit is
connected to a UPS.
The text to use is the following or equivalent:
ISOLATE THE UNINTERRUPTIBLE POWER SYSTEM BEFORE WORKING ON THIS
CIRCUIT.
1
User-Serviceable Parts
All equipment maintenance and servicing procedures involving internal access requires the use of a
tool and should be carried out only by trained personnel. There are no user-serviceable parts behind
covers requiring a tool for removal.
This UPS is fully compliant with safety regulations for equipment located in an operator accessible
area. Hazardous voltage is present within the UPS and battery enclosure but out of reach of non-service personnel. Contact with hazardous voltage is minimized by housing live parts behind safety panels that require a tool for their removal. No risk exists to any personnel when operating the
equipment in the normal manner, following the recommended operating procedures.
Battery Voltage Exceeds 400VDC
All physical battery maintenance and servicing requires the use of a tool or a key and should be carried out only by trained personnel.
!
WARNING
Special care should be taken when working with the batteries associated with this equipment.
When connected together, the battery terminal voltage will exceed 400VDC and is potentially
lethal.
Battery manufacturers supply details of the necessary precautions to be observed when working on,
or in the vicinity of, a large bank of battery cells. These precautions should be followed implicitly at all
times.
Attention should be paid to the recommendations concerning local environmental conditions and the
provision of protective clothing, first aid and fire-fighting facilities.
2
Single Module UPS Installation
1.0
SINGLE MODULE UPS INSTALLATION
1.1
Introduction
This following section describes the requirements that must be taken into account when planning the
positioning and cabling of the Liebert NX uninterruptible power supply and related equipment.
This chapter is a guide to general procedures and practices that should be observed by the installing
engineer. The particular conditions of each site will determine the applicability of such procedures.
!
WARNING
Professional Installation Required
Do not apply electrical power to the UPS equipment before being authorised to do so by the
commissioning engineer.
The UPS equipment shall be installed by a qualified electrical tradesperson in accordance
with the information contained in this manual. All equipment not referred to this manual is
shipped with details of its own mechanical and electrical installation.
NOTE
Three-phase, 4-wire input supply required.
The standard Liebert NX UPS is suitable for connection to 3-phase, 4-wire (+ Earth) TN, TT
and IT AC power distribution systems (IEC60364-3). Optional 3-wire to 4-wire conversion
transformers are available. If it is used in IT AC power distribution systems, a 4-pole circuit
breaker must be used on the input and refer to the relative IT Systems’ standard
!
WARNING
Battery Hazards
Special care should be taken when working with the batteries associated with this equipment.
When connected together, the battery terminal voltage will exceed 400VDC and is hazardous.
Eye protection should be worn to prevent injury from accidental electrical arcs.
Remove rings, watches and all other metal objects.
Use only tools with insulated handles.
Wear rubber gloves.
If a battery leaks electrolyte or is otherwise physically damaged, it must be replaced, stored in
a container resistant to sulfuric acid and disposed of in accordance with local regulations.
If electrolyte comes into contact with the skin, the affected area should be washed
immediately with water.
1.2
Preliminary Checks
Before installing the UPS, please carry out the following preliminary checks:
1. Visually examine the UPS and battery equipment for transit damage, both internally and
externally. Report any damage to the shipper immediately.
2. Verify that the correct equipment is being installed. The equipment supplied has an identification
tag on the back of the main door reporting: the type, size and main calibration parameters of the
UPS.
3
Single Module UPS Installation
1.3
Location
1.3.1
UPS Room
The UPS and its internal battery is intended for indoor installation and should be located in an environment with clean air and with adequate ventilation to keep the ambient temperature within the
specified operating range (see Table 33).
All models in the Liebert NX UPS range are air-cooled with the aid of internal fans. Cold air enters
through ventilation grilles at the front of the cabinet for NXa 30-120kVA and through ventilation
grilles located at the front and bottom of the cabinet for NXa 140-200kVA. Hot air is released through
grilles at the top. Do not cover the ventilation openings.
If necessary to avoid room temperature build-up, install a system of room extractor fans. Optional air
filters are available if the UPS is to operate in a dusty environment.
The UPS heat dissipation detailed in Table 34 can be used as a guide for air conditioning sizing,
depending on the selected mode of operation:
• Normal Mode (VFI SS 111 Double Conversion UPS)
• ECO Mode (VFD SS 311 Stand By UPS)
If in doubt use Normal Mode figures.
NOTE
The UPS is suitable for mounting on concrete or other non-combustible surface only.
1.3.2
External Battery Room
Batteries should be mounted in an environment where the temperature is consistent and even over
the whole battery. Temperature is a major factor in determining the battery life and capacity. Typical
battery manufacturer performance data are quoted for an operating temperature between 20 and
25°C (68 and 77°F). Operating above this range will reduce the battery life while operation below this
range will reduce the battery capacity. In a normal installation the battery temperature is maintained between 15°C and 25°C (59 and 77°F). Keep batteries away from main heat sources or main air
inlets etc.
Where the batteries are located externally to the main UPS cabinet, a battery protection device
(e.g., fuses or circuit breakers) must be mounted as close as possible to the batteries themselves, and
connected using the most direct route possible.
1.3.3
Storage
Should the equipment not be installed immediately, it must be stored in a room for protection against
excessive humidity and or heat sources (see Table 33).
!
CAUTION
An unused battery must be recharged periodically per battery manufacturer
recommendation. Temporarily connecting the UPS to a suitable AC supply mains and
activating it for the time required for recharging the batteries can achieve this.
4
Single Module UPS Installation
1.4
Positioning
The cabinet is mounted on four casters for ease of positioning and for moving short distances. Jacking
feet are provided to prevent the UPS from moving once it has been wheeled to its final position.
For optimal design life, the place chosen must offer:
• Easy connection
• Enough space to easily work on the UPS
• Sufficient air exchange of enough to dispel heat produced by UPS
• Protection against atmospheric agents
• Protection against excessive humidity and very high heat sources
• Protection against dust
• Compliance with the current fire prevention requirements
• Operating environment temperature between 20°C and 25°C (68 and 77°F). The batteries are at
maximum efficiency in this temperature range (see Table 33).
The UPS cabinet is constructed around a steel chassis with removable panels. The top and side panels
are secured to the chassis by screws.
Access to the power terminals, auxiliary terminals blocks and power switches is from the front. Operational status and alarm information is provided through the front door operator control panel. Models 40kVA and below house both the power components and an internal battery. Cooling air enters in
the front of the NXa 30-120kVA and the front and bottom of NXa 140-200kVA; it is exhausted out the
top of each.
1.4.1
System Cabinets
A UPS may comprise a number of cabinets, depending on design requirements (e.g., UPS cabinet, external battery cabinet, external bypass cabinet). In general, all the Liebert cabinets used in a particular
installation are of the same height and designed to be positioned side-by-side to form a matching array.
Refer to 5.0 - Installation Drawings for assistance on positioning the cabinets described below.
1.4.2
30 to 40kVA UPS
The UPS consist of a single cabinet, which uses typically forty (40) 12V battery blocks, fitted internally and connected in series to provide a nominal battery voltage. The UPS may be shipped without
the batteries fitted.
An extended battery option is available. This comprises a separate cabinet containing additional batteries that can be connected to the UPS to increase its battery run time. Battery cabinets and batteries are usually shipped separately.
1.4.3
60-200kVA UPS
The 60 to 200kVA consist of a single cabinet without any internal battery. Usually, with 60 to 200kVA
UPS installations, the batteries are contained in a purpose-built battery cabinet, which sits alongside
the main UPS equipment. Batteries are accessible in the external cabinet from the front, making it
unnecessary to allow for side access.
1.4.4
Moving the Cabinets
!
WARNING
Ensure that any equipment used to move the UPS cabinet has sufficient lifting capacity.
The UPS is fitted with casters. Take care to prevent the NX from moving when unbolting the
unit from its shipping pallet. Ensure that adequate personnel and lifting aids are available
when removing the shipping pallet.
Ensure that the UPS weight is within the designated surface weight loading of any handling equipment. See Table 35.
UPS and optional cabinets (battery cabinets, top cable entry cabinets, etc.) can be handled by means
of a forklift or similar equipment.
The UPS cabinet also can be moved short distances by its casters.
NOTE
Care must be taken when maneuvering units fitted with batteries. Keep such moves to a
minimum.
5
Single Module UPS Installation
1.4.5
Clearances
The Liebert NX has no ventilation grilles at either side of the UPS. To enable routine tightening of
power terminations within the UPS, in addition to meeting any local regulations, Liebert recommends providing adequate clearance in the front of the equipment for unimpeded passage of personnel with the doors fully opened. It is important to leave 800mm (31.5") clearance above the UPS to
permit adequate circulation of air coming out of the unit.
1.4.6
Access
The component layout of the UPS supports front and top access while servicing, diagnosing and
repairing the UPS, thus reducing the space requirement for side and rear access.
1.4.7
Final Positioning
The UPS cabinets are fitted with casters on the base to allow ease of movement and positioning.
!
WARNING
Casters are strong enough for movement across even surfaces only. Caster failure could occur
if they are subjected to shock loading.
When the equipment has been finally positioned, ensure the adjustable feet are set so that the UPS
will remain stationary and stable.
1.4.8
Floor Anchoring
Diagrams in 5.0 - Installation Drawings show the location of the holes in the base plate through
which the equipment may be bolted to the floor. If the equipment is to be installed on a raised floor it
should be mounted on a pedestal suitably designed to accept the equipment point loading.
1.4.9
Cable Entry
Cables can enter the Liebert NX UPS and battery cabinet from below. Cable entry is made possible by
removing a blanking piece fitted at the bottom of equipment to reveal the cable entry hole.
Top Cable Entry—Optional
Optionally a top cable entry extension may be used. The cabinet extends the overall width of the UPS
and permits connection of all incoming AC/DC power cables from above.
The top cable entry option is fitted on the side of the UPS cabinet and is supplied without side panels;
the side cover from the UPS being used.
The cabinet with cables coming in from the top for the 30-40 kVA UPS must be positioned on the left
side; the cabinet for the 60 to 200 kVA UPS can be positioned on either side.
This facilitates cable entry through the top metal panel after the appropriate cable entry holes have
been cut.
NOTE
The top cable entry also includes the power connection cables between the cabinet and the UPS.
1.5
External Protective Devices
Circuit breakers or other protective devices must be installed in the AC supply, external to the UPS.
This chapter provides guidelines for qualified installers who must have knowledge of local wiring
practices pertaining to the equipment to be installed.
6
Single Module UPS Installation
1.5.1
Rectifier and Bypass Input
Overcurrent protection must be installed at the distribution panel of the incoming main supply. The
protection must discriminate with the power cables current capacity and with the overload capacity of
the system (see Table 38). As a guideline, a thermomagnetic circuit breaker, with an IEC 60947-2
trip curve C (normal) for 125% of the current listed in Table 1 is suitable.
Split-Bypass—If a split-bypass is used, install separate protective devices for the rectifier and for
the bypass in the incoming mains distribution panel.
NOTE
Rectifier and bypass input sources must be referenced to the same neutral potential.
NOTE
For IT power systems, four-pole protective devices must be used, external to the UPS, both
upstream of the input distribution panel and downstream (toward the load).
Earth Leakage (RCD)
Any residual current detector (RCD) installed upstream of the UPS input supply must be:
• sensitive to DC unidirectional pulses (Class A)
• insensitive to transient current pulses, and
• must have an average sensitivity, adjustable between 0.3 and 1A.
Figure 1
Residual current circuit breakers (RCCB) symbols
To avoid false alarms, earth leakage monitoring devices when used in systems with split-bypass input
or when used in paralleled UPS configurations, must be located upstream of the common neutral
sinking point. Alternatively, the device must monitor the combined four-wire rectifier and splitbypass input currents.
The residual earth current introduced by the RFI suppression filter inside the UPS is greater than
3.5mA, 1000mA for 30-80kVA, 2000mA for 100-120kVA models and less than 2500mA for
140-200kVA models. Liebert recommends verifying the selectivity with all other differential devices
both upstream of the input distribution board and downstream (toward the load).
1.5.2
External Battery
The UPS and its associated batteries are protected against overcurrents through a DC compatible disconnect device.
1.5.3
UPS Output
Any external distribution board used for load distribution shall be fitted with protective devices that
discriminate with those used at the bypass input to the UPS and with the UPS overload characteristics (see Table 38).
7
Single Module UPS Installation
1.6
Power Cables
The cable design must comply with the voltages and currents provided in this section, follow local wiring practices and take into consideration the environmental conditions (temperature and physical
support media).
For cable entry terminal, refer to Figures 43, 48, 52 and 56.
WARNING
!
Before starting the UPS, ensure that you are aware of the location and operation of the
external isolators that connect the ups input/bypass supply to the mains distribution panel.
Check that these supplies are electrically isolated and post any necessary warning signs to
prevent their inadvertent operation.
Table 1
Maximum steady state AC and DC currents
NOMINAL CURRENT: Amps
Input Mains
with full battery
recharge
3ph + N
BUSBAR STUD SIZE
UPS
RATING
(kVA)
380V
400V
415V
380V
400V
415V
Battery at
minimum
battery
voltage
(400VDC)
30
50
47
45
46
43
42
64
40
65
62
60
61
58
56
85
60
97
92
88
91
86
83
128
80
128
122
117
121
115
111
170
100
160
152
146
152
145
139
213
120
191
181
175
182
174
167
255
140
222
211
204
212
201
194
298
160
254
241
232
242
230
222
340
200
317
301
290
303
288
277
426
Bypass/Output
at full load
3ph + N
Input/Output/
Bypass
Cables
Bolt
Ø holes
Battery
Cables
(Bolts)
M6
7
-
5 (1.12)
M8
9
M10 Ø11
M8: 13 (2.9)
M10: 26 (5.8)
M10
Torque
Load, Nm
(lb/ft)
11
For terminal location – refer to 5.0 - Installation Drawings
Table 2
Distance from floor to connection point on the equipment
Minimum Distance, mm (in)
UPS
UPS 30/40 kVA
Rectifier AC Input supply
350 (13.8)
305 (12)
324 (12.8)
Bypass AC Input supply
300 (11.8)
250 (9.8)
310 (12.2)
UPS Output AC
260 (10.2)
250 (9.8)
310 (12.2)
Battery Power
1030 (40.5)
Auxiliary cables:
Monitor board (U2)
!
UPS 100-120 kVA
UPS 140-200 kVA
230 (9)
1320(52)
Communications
Earth
UPS 60-80 kVA
360 (14.2)
1500 (59)
1070(42.1)
1250(49.2)
350 (13.8)
275 (10.8)
WARNING
338 (13.3)
Failure to follow adequate earthing procedures may result in electromagnetic interference or
in hazards involving electric shock and fire.
8
Single Module UPS Installation
1.6.1
Cable Termination
NOTE
The operations described in this section must be performed by authorised electricians or
qualified technical personnel. If you have any difficulties, do not hesitate to contact our
Customer Service and Support Department. See the back page of this manual for contact
information.
Once the equipment has been finally positioned and secured, connect the power cables as described in
the following procedure.
Refer to the appropriate cable connection drawing in 5.0 - Installation Drawings.
1. Verify that the UPS equipment is isolated from its external power source and all the UPS power
isolators are open. Check that these supplies are electrically isolated and post any necessary
warning signs to prevent their inadvertent operation.
2. Open the door to the UPS cabinet and remove one of the two protective cover to gain access to the
desired connection bars.
• the lower protective cover houses the 60-200kVA connection bars
• the left protective cover houses the 30-40kVA connection bars
The protective cover on the UPS cabinet of 60 to 200kVA models must be removed after the
handles on the power isolators have been removed.
3. Connect the safety earth and any necessary bonding earth cables to the copper earth busbar
located on the floor of the equipment below the power connections. All cabinets in the UPS must
be connected to the user’s ground connection.
NOTE
The earthing and neutral bonding arrangement must be in accordance with local and national
codes of practice.
Identify and make power connections for incoming cables according to one of the two procedures
below, depending on the type of installation.
Common Input Connections
4. For common bypass and rectifier inputs, connect the AC input supply cables between the mains
distribution panel and the UPS input (U1-V1-W1-N terminals) and tighten the connections to
5Nm for M6 bolts, to 13Nm for M8 bolts or to 26Nm for M10 bolts. Ensure correct phase rotation.
Split-Bypass Connections
5. If a split-bypass configuration is used, connect the AC input supply cables to the rectifier input
busbars (U1-V1-W1-N terminals) and the AC bypass supply cables to the bypass input
(U3-V3-W3-N terminals) and tighten the connections to 5Nm for M6 bolts, to 13Nm for M8 bolts
or to 26Nm (M10 bolt). Ensure correct phase rotation.
NOTE
For split-bypass operation, ensure that the linking busbars between bypass and rectifier input
are removed.
The AC input and the AC bypass supplies must be referenced to the same neutral point.
Frequency Converter Mode
If a frequency converter configuration is used, connect the AC input supply cables to the rectifier
input busbars (U1-V1-W1-N terminals). Torque to 5Nm for M6 bolts, to 13Nm for M8 bolts or to
26Nm (M10 bolt). Ensure correct phase rotation. There will not be any AC bypass supply cables to the
bypass input (U3-V3-W3-N terminals) and tighten the connections.
NOTE
For frequency converter operation, ensure that the linking busbars between bypass and rectifier
input are removed.
9
Single Module UPS Installation
Output System Connections
6. Connect the system output cables between the UPS output (U2-V2-W2-N terminals) and the
critical load and tighten the connections to 5Nm for M6 bolts, to 13Nm for M8 bolts or to 26Nm for
M10 bolts. Ensure correct phase rotation.
External UPS Battery Connection (60kVA Models and Above, Option for 30-40kVA Models)
Connect the battery cables between the UPS terminals (+\-) and its associated battery circuit
breaker. Observe the battery cable polarity.
NOTE
When connecting the cables between the battery extremities to the circuit breaker always
connect the circuit breaker end of the cable first.
!
WARNING
If the load equipment will not be ready to accept power on the arrival of the commissioning
engineer, ensure that the system output cables are safely isolated at their ends.
Internal UPS Battery Connection (30/40kVA only)
7. The battery consists of a series string connection of 5 x 8 (or 10) x 12V 6-cell battery blocks.
a. Ensure that the eight (or 10) battery blocks in each tier (tray) are interconnected.
b. Connect the positive and negative cables to the UPS terminals.
c. Plug in the cables between the tiers.
d. Ensure correct polarity battery string series connections (i.e., intertier and
interblock connections are from positive to negative terminals.
!
WARNING
Hazardous Battery Terminal Voltage 480VDC
Ensure correct polarity of string end connections to the UPS terminals, i.e., positive to
positive and negative to negative, but leave these UPS terminal cables disconnected until
connection is authorised by the commissioning engineer.
Ensure correct polarity of string end connections to the battery circuit breaker and from the
battery circuit breaker to the UPS terminals, i.e., positive to positive and negative to negative,
but disconnect one or more battery cell links in each tier.
Do not reconnect these links and do not close the battery circuit breaker before authorised by
the commissioning engineer.
8. Refit all protective covers removed for cable installation.
10
Single Module UPS Installation
1.7
Control Cables and Communication
1.7.1
Monitor Board Features
Based on your site’s specific needs, the UPS may require auxiliary connections to manage the battery
system (external battery circuit breaker, battery temperature sensor), communicate with a personal
computer or provide alarm signaling to external devices or for Remote Emergency Power Off (REPO).
The monitor board, arranged for this purpose, is located on the rear of the operator access door. The
main features are:
•
•
•
•
•
•
•
Figure 2
Input and Output dry contacts signal (one pair of contacts of relay)
Emergency Power Off control (EPO)
Environmental parameter input interface
User communication (for data setting and user background monitor)
Intellislot™ interface
Modem interface
Temperature detect interface
Monitoring board (U2) auxiliary terminal block detail
J8
J3
J1
LCD
J22
X7
J23
X6
J12
J9
J2
J15
PWR
Modem
SNMP Card
J16
J17
Intellislot 2
J13
J21
J25
J28
J4
J26
J30
J10
Intellislot 1
X4
J24
Intellislot 3
BFP
INV
X1
ACF
EPO
X2
Dry In
MBC
BCB
X3
11
The black square (
)
on each slot indicates Pin 1.
X4
X5
Single Module UPS Installation
1.8
Dry Contacts
The UPS provides input dry contacts and output dry contacts.
1.8.1
Input Dry Contacts
There are several input dry contacts at the X3 slot.
X3 Ancillary Control and Alarms
X3 IN DRY: Environmental, Battery Ground Fault and Generator Contacts
The UPS accepts external signalling from voltage-free (dry) contacts connected to finger-proof, pushin terminal X3 IN DRY. Subject to prior software programming, the signalling is accepted by the UPS
when connection between the relevant terminal and the +12V terminal is altered. Cables connected to
X3 IN DRY must be segregated from power circuits (for screening purposes), double insulated and of a
typical 0.5 to 1mm2 cross-section area for maximum runs between 25 and 50 meters (82-164 ft),
respectively.
Figure 3
Input dry contacts
12V
12V
12V
12V
X3
Table 3
DRV
FB
GND
OL
FUSE
F_FAN
J10
T_OT
AUX_O
T_IT
AUX_I
J30
12V
GND
ENV
BtG
J26
GEN
12V
J4
Input dry contacts at X3
Position
Name
3
J4.1
ENV
J4.2
BtG
J4.3
GEN1,2
J4.4
+12V
Description
Battery Room Alarm (NC)
Battery Ground Fault Detection (NC)
On Generator (NO)
+12V Power
1 - Must be configured by configuration software before becoming active.
2 - When activated, the charger current can be limited, via software, to a percentage of the full charger current (0-100%).
3 - Activating this feature turns the battery charger off.
NOTE
All auxiliary cables of terminal must be double-insulated. Wire should be 0.5-1.5mm2
(16-20AWG) stranded for maximum runs between 25 and 50m (82-164 ft.) respectively.
12
Single Module UPS Installation
1.8.2
Maintenance Bypass Cabinet Interface
J26 and J30 are the MBC interface.
Table 4
Maintenance bypass cabinet interface
Position
Name
1
Description
Input transformer overtemperature (NC)
J26.1
T_IT
J26.2
AUX_I
Reserved
J26.3
+12V
+12V Power
J26.4
GND
Power Ground
J30.1
FUSE
Reserved
J30.2
F_FAN
Fan Fail Alarm (NC)
J30.3
T_OT
1
J30.4
AUX_O
1
Output Transformer Overtemperature (NC)
Reserved
- Must be configured by software before becoming active
NOTE
All auxiliary cables of terminal must be double-insulated. Wire should be 0.5-1.5mm2
(16-20AWG) stranded for maximum runs between 25 and 50m (82-164 ft.) respectively.
1.8.3
External Circuit-Breaker Interface
J10 is the interface to any external battery circuit breaker (BCB).
External circuit-breaker interface
Table 5
Position
Name
Description
J10.1
DRV
BCB Driver Signal - Output (N.O.)
J10.2
FB
BCB Contact State - Input (N.O.)
J10.3
GND
J10.4
OL
Power Ground
BCB On-Line - Input - This pin will become active when
BCB interface is connected. (N.O.)
NOTE
All auxiliary cables of terminal must be double insulated. Wire should be 0.5-1.5mm2
(16-20AWG) stranded for maximum runs between 25 and 50 meters (82-164ft.) respectively.
13
Single Module UPS Installation
1.8.4
Output Dry Contacts
There are three output dry contact relays at the X1 slot (see Figure 4 and Table 6)
NOTE
All auxiliary cables of terminal must be double-insulated. Wire should be 0.5-1.5mm2
(16-20AWG) stranded for maximum runs between 25 and 50m (82-164 ft.) respectively.
Figure 4
Output dry contacts and EPO wiring for firmware before M162
+12V
Figure 5
X2
ACF_O
J25
ACF_S
ACF_C
INV_C
BFP_O
BFP_S
BFP_C
Table 6
J25
INV_O
J21
J13
INV_S
X1
EPO-H
EPO-L
Output dry contact relays for firmware before M162
Position
Name
Description
J13.2
J13.3
J13.4
J21.2
J21.3
J21.4
J25.2
J25.3
J25.4
BFP_O
BFP_S
BFP_C
INV_O
INV_S
INV_C
ACF_O
ACF_S
ACF_C
Bypass feedback protection relay; normally open. Closed when bypass SCR is shorted.
Bypass feedback protection relay center
Bypass feedback protection relay; normally closed. Open when bypass SCR is shorted.
Inverter mode relay; normally open. Closed when UPS is in inverter mode.
Inverter mode relay center
Inverter mode relay; normally closed. Open when UPS is in inverter mode.
Main input fault relay; normally open. Closed when main input is in fault.
Main input fault relay center
Main input fault relay; normally closed. Open when main input is in fault.
EPO wiring for firmware M200 or later
X2
J28
EPO-NO
1.8.5
EPO-NC
Emergency Power Off Input
The UPS has an Emergency Power Off (EPO) function that operates by a button on the control panel
or by a remote contact provided by the user. The EPO button is under a hinged, clear plastic shield.
The X2 slot, shown in Figure 4, is the remote EPO input interface. The EPO has an NO/NC contact
point that becomes active when shorting terminals X2: 3 and 4 or open terminal connection X2: 2 and 1
If an external emergency stop facility is required, it is connected terminals X2: 1&2 or X2: 3&4 of the
auxiliary terminal block (X2). It also is connected to the normally open or normally closed remote stop
14
Single Module UPS Installation
switch between these two terminals using shielded cable (see Figure 4 and Table 7). If this function
is not used, terminals X2: 3&4 must be opened and X2: 1&2 must be closed.
Table 7
EPO input contact relays
Position
Name
J28.1
EPO_NC
EPO Activated when opened to J28.2
J28.2
EPO_NC
EPO Activated when opened to J28.1
J28.3
EPO_NO
EPO Activated when shorted to J28.4
J28.4
EPO_NO
EPO Activated when shorted to J28.3
Description
NOTE
The emergency stop action within the UPS shuts down the rectifier, inverter and static bypass.
It does not internally disconnect the input power supply. To disconnect ALL power to the UPS,
open the upstream feeder breaker(s) when the remote EPO is activated.
NOTE
Normally closed EPO – X2: 1,2, these terminals are supplied factory-linked on the monitor
board and must remain installed if using NC contacts.
NOTE
All auxiliary cables of terminal must be double insulated. Wire should be 0.5-1.5mm2
(16-20AWG) stranded for maximum runs between 25 and 50 meters (82-164ft.) respectively.
X5: Auxiliary DC Power Output
Auxiliary DC power for modem or external SNMP card. The voltage is between 9V to 12V. The maximum current is 500mA.
X6: Analog Input Interface
Two analog signal channels with an input range is from 0 to +12V. The precision of detection is ÷3%.
•
•
•
•
X6 pin 1: Not used
X6 pin 2: +12V
X6 pin 3: ENV-T – environment temperature detection
X6 pin 4: GND
X7: External Battery Temperature Detector Interface
Interface for TMP12Z temperature detector, normally connected to an external battery cabinet (see
Figure 26).
Pin reference:
•
•
•
•
X7 pin 1: Not used
X7 pin 2: +12V (Power supply for Temperature Monitoring Probe)
X7 pin 3: BAT-T (Battery Temperature signal)
X7 pin 4: GND
15
Single Module UPS Installation
Serial Ports RS232-1 and RS232-2
RS232-1 provides serial data and is intended for direct use with Liebert MultiLink monitoring and
server shutdown software.
RS232-2 provides serial data and is intended for use by authorized commissioning and service personnel.
These serial ports are shared with the optional Web browser, SNMP, ModBus and relay cards. Refer
to Table 31 regarding compatibility of simultaneous use.
Intellislot Web Browser, SNMP, ModBus and Relay Cards Interface
There are three interface slots available for optional Web browser, SNMP, ModBus and Relay cards
as illustrated in 9.0 - Options—For Assembly Inside the UPS Cabinet.
1.8.6
External Bypass Switch Interlock
EXT-Maint X3-1&2 on UPS Parallel Board M3 (leave open if no external bypass switch is used)
Provides external maintenance bypass interlock protection for the UPS. Short circuit means external
bypass closed.
EXT-Out (X3-3&4) on UPS Parallel Board (leave shorted if no external output switch is used). Provides external output interlock protection for paralleled UPS modules. Short circuit means external
output switch closed.
NOTE
UPS Parallel Board M3 is located behind protective covers accessible after opening the UPS
front door—removal of this barrier requires the use of a tool and is restricted to service
personnel.
NOTE
Jumper JP1 (located next to X3) needs to be removed for X3:3&4 to work properly.
16
Battery Installation
2.0
BATTERY INSTALLATION
2.1
Introduction
The UPS battery bank consists of battery blocks connected in series to provide a D.C. string voltage as
required by the UPS converter. The 'AUTONOMY TIME' (the time during which the battery can
maintain supply to the load in the event of a mains failure) is limited by the ampere-hour capacity of
the battery blocks and in some cases this results in several strings being connected in parallel.
The NX 30-40kVA has internal batteries, but longer run time is available by using an external battery cabinet.
The battery cabinet will be supplied in one of the following forms:
1. Complete installation, comprising the battery cabinet, batteries and protective device.
2. Battery cabinets and protective device only—batteries supplied by others
3. Battery cabinet only—batteries and circuit breaker supplied by others.
NOTE
30kVA to 40kVA UPS models contain an internal battery compartment that can accommodate
up to 42 blocks 24 Ah/12V batteries.
The battery bank may be disconnected from the UPS for maintenance or service. The circuit breaker
can be switched ON or OFF manually and further battery isolation control is achieved through the
use of either a battery circuit-breaker undervoltage coil or through an automatic contactor inside the
UPS.
17
Battery Installation
2.2
Safety
Special care should be taken when working with the batteries associated with the Liebert NX UPS
system. When all the cells are connected together, the battery terminal voltage is potentially hazardous. The battery installation must be segregated from all but appropriately qualified maintenance
personnel by locating the cells in a key-lockable cabinet or in a purpose-designed, dedicated battery
room.
NOTE
Full safety instructions concerning the use and maintenance of UPS batteries are provided in
the appropriate battery manufacturers manuals. The battery safety information contained in
this section relates to key considerations that must be taken into account during the
installation design process and might affect the design outcome depending on localised
conditions.
!
WARNING
Hazardous battery voltage present behind covers
No user-serviceable parts are located behind covers that require a tool for their removal. Only
qualified service personnel are authorised to remove such covers.
When using internal batteries in 30 and 40kVA units, the batteries are always connected
through power fuses to the UPS and to the segregated terminal bars available for connection
to an external battery.
Isolate any internal battery connections before attempting to access the segregated terminal
bars available for connection to an external battery.
The following general battery safety precautions and warnings should be observed at all
times:
• A battery can present risk of electric shock or burn from high- short-circuit currents.
• The full nominal string voltage, when the battery blocks are interconnected, is 480VDC,
which is hazardous
• Only qualified personnel should install or service batteries.
• Eye protection should be worn to prevent injury from electrical arcs.
• Remove rings, watches, necklaces, bracelets and all other metal objects.
• Use only tools with insulated handles.
• Wear rubber gloves and a rubber apron when handling batteries.
• If a battery leaks electrolyte or is otherwise damaged, it should be placed in a container
resistant to sulfuric acid and disposed of in accordance with local regulations.
• If electrolyte comes into contact with the skin the affected area should be washed immediately with plenty of clean water.
• Batteries must always be disposed of according to local environmental laws.
• When replacing batteries, use the same number and type that were originally fitted.
• Disconnect charging source before connecting or disconnecting battery terminals.
• Determine whether the battery is inadvertently grounded. If it is inadvertently grounded,
remove the source of the ground. Contact with any part of a grounded battery can result in
electrical shock.
2.3
Battery Cabinet
2.3.1
Introduction
This cabinet can also be used in conjunction additional cabinets, to provide the necessary accommodation required by the larger cells associated with system’s having a long autonomy time.
Where two (or more) cabinets are used they are positioned alongside each other and secured and
bonded together. If the cabinet(s) is located immediately adjacent to the main UPS equipment the two
units are bolted together.
18
Battery Installation
2.3.2
Temperature Considerations
Valve-regulated, lead acid battery cells are sensitive to ambient temperature and should be operated
between 15°C and 25°C (59-77°F). Battery capacity is increased by 1% for every 1°C (2°F) increase in
temperature up to 25°C (77°F). Battery life is reduced at temperatures above 25°C (77°F).
When batteries are mounted in the same room as the UPS unit, it is the battery that dictates the
designed maximum ambient temperature, not the UPS. — i.e. in the case of valve-regulated cells, the
ambient room temperature should be kept between 15°C and 25°C (59-77°F), and not between 0°C
and 40°C (32-104°F) (which is the specified main equipment operating temperature range). Temperature deviations are permissible for short periods, provided the average temperature does not exceed
25°C (77°F).
2.3.3
Dimensions
The external dimensions are shown in Table 8. These are the same height and depth as the UPS
module and provide a matching appearance when bolted together. All cabinets are fitted with doors,
which must be fully opened in order to fit or remove the batteries. The door swing must therefore be
taken into consideration when planning the positioning of the cabinets.
2.3.4
Weight
The unladen weight is shown below in Table 8. When designing the battery installation the weight of
the batteries and cables must be added to the unladen weight. This is particularly important when
placing the NX on a raised floor.
Table 8
2.3.5
Dimensions and weight
Rated Service
Current (In)
Rated
Uninterrupted
Current (IU)
External Cabinet
WxDxH, mm (in)
Cabinet Weight
Without Batteries,
kg (lb)
Model
UPS Ratings
Narrow
Cabinet
30kVA
40kVA
60kVA
80kVA
125A
200A
160A
250A
828x825x1600
(32.6x32.4x63)
200 (441)
Wide
Cabinet
30kVA
40kVA
60kVA
80kVA
125A
200A
160A
250A
1490x825x1600
(58.7x32.4x63)
270 (595)
Large
Cabinet
100kVA
120kVA
140kVA
160kVA
200kVA
400A
500A
400A
500A
1490x825x1800
(58.7x32.4x76.9)
305 (672)
Circuit Breaker Features
In 30 to 40kVA models fitted with internal battery and in all models fitted with a Battery Start kit,
the UPS is fitted with an internal contactor for automatic connection and disconnection of the batteries. External battery banks connected to such models generally are protected by a standard battery
circuit breaker (with status contacts and without undervoltage trip coil). Refer to 2.5 - Battery Control for details.
When no internal contactor for automatic disconnection is installed in the UPS module, the external
battery disconnection is performed by fitting a Circuit Breaker Controller Board and an undervoltage
coil to the battery circuit breaker.
The circuit breaker can then be manually closed once the DC busbar is above the ‘low battery; trip
voltage. Once closed, the circuit breaker can be opened manually at any time and is tripped automatically by the UPS module following certain fault occurrences, an emergency power off command or if
low/high DC busbar voltage is detected. Refer to 2.5 - Battery Control for details.
19
Battery Installation
2.3.6
Moving the Battery Cabinets
!
WARNING
Ensure any lifting equipment used in moving the cabinet has sufficient lifting capacity.
Ensure that the weight is within the designated surface weight loading of any handling equipment.
See Table 8 for weight details.
Battery cabinets can be handled by means of a fork lift or similar equipment.
NOTE
Care must be taken when maneuvering units fitted with batteries. Keep such moves to a
minimum.
When the equipment has been finally positioned ensure the adjustable feet are set so that the
battery cabinet will remain stationary and stable.
2.3.7
Cable Entry
Cables enter the battery cabinet from either the top or the bottom. Cable entry is made possible by
removing a blanking piece fitted at the bottom to reveal the cable entry hole.
20
Battery Installation
2.3.8
General Arrangement Drawings
Refer to Figures 6 through 10 for general arrangement of battery cabinet models.
Narrow battery cabinet with top and bottom cable entry locations
828
825
1600
FRONT VIEW
566,5
FRONT VIEW
Door Open
TOP
VIEW
660
55
630
250
55
55
96,5
100
BOTTOM
VIEW
55
Figure 6
BACK VIEW
21
SIDE VIEW
Battery Installation
Narrow battery cabinet with top cable entry location
Top
Cable Entry
100x250 mm
(3.9x9.8")
225
(8.8")
Figure 7
Front
96,5
(3.8")
Front
Front
22
Battery Installation
Figure 8
Wide battery cabinet with top and bottom cable entry locations
1600
825
Side View
100
603
603
70
100
Side View
Front View
1490
Top View
55
630
55
1321
55
Bottom View
23
55
Battery Installation
Wide battery cabinet with bottom cable entry location
265
150
150
152
Figure 9
270
270
Bottom View
Front View
24
Battery Installation
Figure 10 Wide battery cabinet with fuse or optional circuit breaker locations
Output
busbar
connections
Fuses
(alternative
to BCB)
Battery
Circuit Breaker
Top Cable
entry
BCB
controller board
Adjustable
Fixing Feet
Bottom Cable entry
25
Battery Installation
180
552
Figure 11 Large battery cabinet dimensions
Top View
660
300
116
Front
1800
300
1488
130
270
270
691
130
567
630
150
55
825
Side
55
116
55
660.5
660.5
Bottom View
26
55
Battery Installation
Figure 12 Large battery cabinet with fuse or optional circuit breaker locations
Fuses
(alternative
to BCB)
Output
busbar
connections
Battery
Circuit Breaker
BCB
controller board
27
RED
GREEN
GREEN
RED
X108-1
X108-2
X108-3
X102-1
X102-2
X102-3
X102-4
P
W301
X100-2
X100-1
Temp. transport
J1
Temp. channels reserved for Batt. cabinet Paralleling
BLUE
BLUE
X100-4
TO UPS
TO UPS
RED
X101-3
X105-1
X105-2
BCB Control board
N
X106-1
X106-2
X106-3
3. Used for: NPX-100; UH12V140/A; UH12V200/A; UPS12-100; UPS12-140; UPS12-170; UPS12-200.
NOTE:
1. Please refer to BCB BOX user instructions for cable connection.
2. If no internal Control board used, temp. transport cables should be connected
directly to external BCB control board. Meanwhile, the undervoltage release function
for the internal BCB is not needed.
W302
P12
W102
Layer 1
Layer 2
Layer 3
Layer 4
FRONT VIEW
W101
BCB
SPACE
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
Tray in Layer 1
W001
W001
W002
W002
BCB(125/200A)
X103-1
X103-2
X100-3
X103-3
OUT
28
X104-1
X104-2
N.O.
GND
BLACK
X101-1
X105-3
V<
X104-3
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
Tray in Layer 2
W001
W001
W001
W001
W001
W001
Tray in Layer 3
W002
W002
Tray in Layer 4
Battery Installation
Figure 13 SENXA0NBCN4LCB.eps
W002
W002
FWP-120A/200A
(Bussmann Fuses)
W003
W004
GREEN
Temp. transport
P12
W005
W006
BLUE
J1
PP120/180-BLACK
(Anderson connector)
PP120/180-RED
(Anderson connector)
2. Used for: NPX-100; UH12V140/A; UH12V200/A; UPS12-100; UPS12-140; UPS12-170;
UPS12-200.
NOTE:
1. When fuses are used for overcurrent protection, the temp.signals shall go
directly to the control board in external BCB BOX.
RED
TO BCB BOX
TO BCB BOX
OUT
29
GND
Layer 1
Layer 2
Layer 3
Layer 4
FRONT VIEW
BCB
SPACE
W001
W001
W001
W001
W001
W001
W001
W001
Tray in Layer 1
W001
W001
W001
W001
W001
W001
W001
W001
W002
W002
W002
W001
W001
W001
W001
W001
W001
W001
W001
W001
Tray in Layer 2
W001
W001
W001
W001
W001
W001
W001
Tray in Layer 3
W002
W002
Tray in Layer 4
Battery Installation
Figure 14 SENXA0NBCN4LF
W002
X100-3
X100-4
W301
Temp. transport
J1
Temp. channels reserved for Batt. cabinet Paralleling
BLUE
BLUE
X103-3
RED
X101-3
BCB Control board
N
W102
X106-1
X106-2
TO UPS
TO UPS
NOTE:
1. Please refer to BCB BOX user instructions for cable connection.
2. If no internal Control board used, temp. transport cables should be connected directly
to external BCB control board. Meanwhile, the undervoltage release function for the
internal BCB is not needed.
RED
GREEN
GREEN
RED
X108-1
X108-2
X108-3
X102-1
X102-2
X102-3
X102-4
P
X100-1
X104-1
X104-2
W302
P12
FRONT VIEW
Layer 1
Layer 2
Layer 3
Layer 4
Layer 5
W001
W001
W001
W001
W001
BCB
SPACE
W002
W002
W001
Tray in Layer 1
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W002
W002
Tray in Layer 4
W002
W002
BCB(125/200A)
X103-1
X103-2
X100-2
X104-3
N.O.
OUT
BLACK
X101-1
X105-1
X105-2
30
X105-3
V<
GND
W001
W001
W001
W001
W001
W001
Tray in Layer 2
W001
W001
W001
W001
W001
W001
Tray in Layer 3
W002
W002
Tray in Layer 5
Battery Installation
Figure 15 SENXA0NBCN5LCB
X106-3
W101
FWP-120A/200A
(Bussmann Fuses)
GREEN
PP120/180-RED
(Anderson connector)
Temp. transport
J1
2. Used for: UH12V100/A; NPX-150; NPL24-12,38-12; S512/38; 12XLB150; P12V570,875; L12V32.
Layer 1
Layer 2
Layer 3
Layer 4
Layer 5
FRONT VIEW
W001
W001
W001
W001
W001
W001
BCB
SPACE
W001
W001
W001
W001
W001
W001
Tray in Layer 1
W001
W001
W001
W001
W001
W001
W001
W002
W002
Tray in Layer 4
W002
W002
W005
W006
BLUE
PP120/180-BLACK
(Anderson connector)
NOTE:
1. When fuses are used for overcurrent protection, the temp.signals shall go directly to the
control board in external BCB BOX.
RED
TO BCB BOX
P12
W002
W002
W003
W004
TO BCB BOX
OUT
31
GND
W001
W001
W001
W001
W001
W001
Tray in Layer 2
W001
W001
W001
W001
W001
W001
Tray in Layer 3
W002
W002
Tray in Layer 5
Battery Installation
Figure 16 SENXA0NBCN5LF
RED
TO UPS
TO UPS
FRONT VIEW
Layer 1
Tray master
Layer 2
Tray master
X106-1
X106-2
W301
J1
BCB
SPACE
Temp. channels reserved for Batt. cabinet Paralleling
BLUE
BLUE
N
RED
X101-3
X105-1
X105-2
BCB Control board
Temp. transport
Layer 3
Tray master
RED
GREEN
GREEN
X108-1
X108-2
X108-3
P
X100-1
X104-1
X104-2
X102-1
X102-2
X102-3
X102-4
P12
W302
X103-1
X103-2
X100-2
X104-3
X100-3
X103-3
OUT
X100-4
GND
BLACK
X101-1
X105-3
NOTE:
W102
W101
W001
Tray in Layer 3
W002
W001
Tray in Layer 2
W001
1. Please refer to BCB BOX user instructions for cable connection.
2. If no internal Control board used, temp. transport cables should be
connected directly to external BCB control board. Meanwhile, the
undervoltage release function for the internal BCB is not needed.
3. Used for: A412/32 G6.
W002
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W002
W002
W001
Tray in Layer 1
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
32
W001
N.O.
W001
W001
W001
V<
W001
BCB(125/200A)
Battery Installation
Figure 17 SENXA0NBCWXX3LCB
X106-3
FWP-120A/200A
(Bussmann Fuses)
W005
GREEN
TO BCB BOX
BLUE
Temp. transport
P12
FRONT VIEW
Layer 1
Tray master
Layer 2
Tray master
Layer 3
Tray master
RED
W003
W004
GND
W006
TO BCB BOX
OUT
PP120/180-BLACK
(Anderson connector)
J1
BCB
SPACE
NOTE:
W102
W101
W001
W002
W001
Tray in Layer 2
W001
3. Used for: A412/32 G6.
2. If no internal Control board used, temp. transport cables
should be connected directly to external BCB control board.
Meanwhile, the undervoltage release function for the internal
BCB is not needed.
1. Please refer to BCB BOX user instructions for cable connection.
W002
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W002
W002
W001
Tray in Layer 1
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
W001
33
W001
PP120/180-RED
(Anderson connector)
Tray in Layer 3
Battery Installation
Figure 18 SENXA0NBCWXX3LF
W302
34
RED
GREEN
GREEN
RED
X108-1
X108-2
X108-3
P
TO UPS
TO UPS
FRONT VIEW
Layer 1
Tray slave
Layer 1
Tray master
BCB
SPACE
Layer 2
Tray slave
J1
Layer 2
Tray master
Layer 3
Tray master
X106-1
X106-2
W301
Temp. channels reserved for Batt. cabinet Paralleling
BLUE
BLUE
N
RED
X101-3
BCB Control board
X100-4
Temp. transport
P12
X100-1
X104-1
X104-2
X102-1
X102-2
X102-3
X102-4
X103-1
X103-2
Layer 4
Tray master
N.O.
GND
X100-2
X104-3
X100-3
X103-3
OUT
BLACK
X101-1
X105-1
X105-2
V<
X105-3
BCB(125/200A)
Tray in Layer 2
W102
W101
W004
3. Used for: UH12V270/A,310/A,370/A,500/A; UPS12-270,310,370,475;
A412/50,65 G6; NPL65-12; NPL78-12; NPL100-12; 1290S.
2. If no internal Control board used, temp. transport cables should be
connected directly to external BCB control board. Meanwhile, the
undervoltage release function for the internal BCB is not needed.
NOTE:
1. Please refer to BCB BOX user instructions for cable connection.
W001
W001
W001
W001
W001
W001
W004
W001
W001
W001
W001
Tray master
W001
Tray in Layer 4
W001
W001
Tray master
W002
W002
W001
W001
Tray slave
W004
W002
BCB
SPACE
Tray slave
W001
W001
W001
W001
W001
W001
Tray master
Tray master
W003
W004
W001
W001
W001
Tray in Layer 1
W001
W001
W001
Tray in Layer 3
W001
W001
W001
Tray slave
W003
Tray slave
Battery Installation
Figure 19 SENXA0NBCWXX4LCB_2x4
W003
X106-3
FRONT VIEW
Layer 1
Tray slave
Layer 1
Tray master
BCB
SPACE
Layer 2
Tray slave
J1
Layer 2
Tray master
Layer 3
Tray master
X106-1
X106-2
W301
Temp. channels reserved for Batt. cabinet Paralleling
BLUE
BLUE
W001
Tray in Layer 2
W002
Tray slave
W002
BCB
SPACE
W001
W001
W001
W001
W001
W001
W101
W002
W002
NOTES:
1. Please refer to BCB BOX user instructions for cable connection.
2. If no internal Control board used, temp. transport cables should be connected directly
to external BCB control board. Meanwhile, the undervoltage release function for the internal BCB is not needed.
3. Used for: A412/85 F10.
W002
Tray master
W002
W001
TO UPS
TO UPS
RED
X101-3
X105-1
X105-2
BLACK
X101-1
X105-3
BCB Control board
X100-4
Temp. transport
Layer 4
Tray master
RED
GREEN
GREEN
RED
X108-1
X108-2
X108-3
P12
X100-1
X104-1
X104-2
X102-1
X102-2
X102-3
X102-4
X103-1
X103-2
X100-2
X104-3
X100-3
X103-3
OUT
N
W001
W001
W001
W302
GND
P
W001
W001
W002
W001
W001
Tray slave
W001
W001
Tray in Layer 4
Tray master
Tray master
W001
W001
Tray master
W001
W001
W001
35
Tray in Layer 3
Tray in Layer 1
W001
W001
N.O.
W003
W001
W002
W002
W001
V<
W001
Tray slave
Tray slave
W001
BCB(125/200A)
Battery Installation
Figure 20 SENXA0NBCWXX4LCB_4x2
W001
W102
X106-3
FWP-120A/200A
(Bussmann Fuses)
W003
GREEN
BLUE
Temp. transport
P12
FRONT VIEW
Layer 1
Tray slave
Layer 1
Tray master
BCB
SPACE
Layer 2
Tray slave
J1
PP120/180-BLACK
(Anderson connector)
Layer 2
Tray master
Layer 3
Tray master
Layer 4
Tray master
RED
W005
W006
TO BCB BOX
OUT
36
GND
W004
TO BCB BOX
W101
PP120/180-RED
(Anderson connector)
W001
W001
W001
W001
W004
Tray in Layer 2
W004
W001
W001
W001
W001
Tray master
W001
W001
W001
W001
W001
Tray in Layer 4
NOTES:
1. Please refer to BCB BOX user instructions for cable connection.
2. If no internal Control board used, temp. transport cables should be connected
directly to external BCB control board. Meanwhile, the undervoltage release
function for the internal BCB is not needed.
3. Used for: UH12V270/A,310/A,370/A,500/A; UPS12-270,310,370,475; A412/50,65 G6;
NPL65-12; NPL78-12; NPL100-12; 1290S.
W102
Tray master
W002
W002
W001
W001
Tray slave
W004
W002
BCB
SPACE
Tray slave
W001
W003
W004
W001
W001
W001
Tray in Layer 1
W001
Tray master
W001
W001
W001
Tray in Layer 3
W001
W001
W001
W001
Tray master
W001
W001
W001
Tray slave
W003
Tray slave
Battery Installation
Figure 21 SENXA0NBCWXX4LF_2x4
W003
FWP-120A/200A
(Bussmann Fuses)
BLUE
OUT
P12
Layer 1
Tray slave
Layer 1
Tray master
FRONT VIEW
Layer 2
Tray slave
BCB
SPACE
Layer 2
Tray master
Layer 3
Tray master
Layer 4
Tray master
Temp. transport
PP120/180-BLACK
(Anderson connector)
J1
W001
W002
Tray in Layer 2
W001
W001
W001
W101
NOTES:
1. Please refer to BCB BOX user instructions for cable connection.
2. If no internal Control board used, temp. transport cables should be connected
directly to external BCB control board. Meanwhile, the undervoltage release
function for the internal BCB is not needed.
3. Used for: A412/85 F10.
W001
W003
RED
GREEN
W001
Tray master
W001
W005
TO BCB BOX
W001
W001
W004
TO BCB BOX
W002
W001
W001
W001
W002
Tray slave
W002
BCB
SPACE
W002
W002
W001
W001
W002
W001
W001
Tray slave
Tray master
Tray master
W001
W001
Tray in Layer 4
W001
W001
W001
Tray in Layer 3
Tray in Layer 1
W001
W001
W006
GND
W003
W001
W002
W002
W001
37
W001
Tray slave
Tray slave
W001
Tray master
Battery Installation
Figure 22 SENXA0NBCWXX4LF_4x2
W001
W001
W102
PP120/180-RED
(Anderson connector)
Battery Installation
2.4
Battery Power Cables
2.4.1
Connection Principles
The following notes, in conjunction with the diagrams, illustrate the broad principles to be followed
when fitting and connecting the majority of battery installations.
2.4.2
Fitting the Batteries
1. In general, at least 10mm (3/8") must be left unobstructed on all vertical sides of the battery
blocks to permit free air movement around the cells.
2. Clearance should be allowed between the top of the cells and the underside of the shelf above (this
is necessary for monitoring and servicing the cells).
3. When installing the batteries on racks always work from the bottom shelf upwards to prevent
raising the centre of gravity.
2.4.3
Connecting the Battery
1. When the battery cabinet is installed on a raised floor the battery power cables and optional
circuit breaker control cables can be routed to the UPS cabinet via the floor of the cabinet. If the
UPS and battery cabinet are located adjacent to each other and located on a solid floor these
cables can be passed between the cabinets via the lifting apertures located in the lower sides of
the cabinets.
2. In general it is recommended that the inter-connecting cables be fitted to the batteries within
their particular level before fitting the inter-level connecting cables, followed finally by the cables
to the circuit breaker.
3. An insulating shroud should be fitted to each terminal after its connection has been made.
4. When connecting the cables between the battery string ends to the optional circuit breaker always
connect the circuit breaker end of the cable first.
2.4.4
Battery Room Design
Whatever the type of mounting system selected, the following conditions should be noted:
• Cell Layout—1
Whichever battery mounting system is used, the batteries should be arranged to prevent the possibility of simultaneous contact with two exposed live parts having a potential greater an 150V.
Where this is not possible, insulated terminal shields must be installed and insulated cables must
be used for connections.
• Service Platform—2
The service platform (or duckboard) must be slip-proof, insulated from the floor and at least one
metre (39 in.) wide.
• Connections—3
All connections must be as short as possible.
• Battery Protection Fuses/Circuit Breaker—4
The battery circuit breaker is generally installed at the front of the battery room. See 2.5 - Battery Control for details on connecting the circuit breaker box available for the Liebert NX.
Figure 23 Battery room design
4
1
3
2
38
Battery Installation
2.5
Battery Control
The battery circuit breaker is controlled by the battery circuit breaker controller board, which is
located within the battery cabinet or adjacent to the battery circuit breaker when the batteries are
rack-mounted. This board controls the circuit breaker's undervolt release coil and also provides a path
for the circuit breaker auxiliary contacts to signal the circuit breaker status back to the UPS control
logic. Refer to Figure 25. All connections between the controller board and the UPS unit are made
via auxiliary terminal Block X3 BCB of the Monitor Board, which is located at the rear of the door in
the UPS Cabinet (refer to 1.8.3 - External Circuit-Breaker Interface).
Battery temperature sensor cables are connected between UPS auxiliary terminal block X3 BCB, the
Battery Circuit Breaker controller board and the battery as shown in Figures 25 and 26.
Cables connected to X3 BCB must contain a protective earth wire or a shield, be segregated from
power circuits, double insulated and of a typical 0.5 to 1mm2 cross-section area for maximum runs
between 25 and 50 meters respectively. The shield should be connected to the protective earth of the
battery cabinet or battery breaker, not at the UPS
!
CAUTION
UPS containing an internal automatic battery contactor do not require BCB board, nor
undervoltage control of the BCB.
In this case, direct wiring to the NX Monitor Board is required:
• the auxiliary NO contact of the battery circuit breaker is wired directly to the NX monitor
board terminal X3 BCB: 2-3.
• “On-Line” X3 BCB terminals 4-3 of the NX monitor board are linked.
• Any temperature sensor is wired directly to the NX monitor board terminal X7:
2(+12V),3(signal),4(GND).
For details, refer to 1.7 - Control Cables and Communication
The above applies to:
• 30 to 40kVA models with internal battery
• - any model with the Battery Start option
• The commissioning engineer must program the UPS accordingly (e.g., enable or disable battery temperature compensation, enable internal battery contactor).
39
Battery Installation
2.6
Battery Circuit Breaker Box
The box contains a battery isolating circuit breaker and the circuit breaker controller board as also
mounted in the battery cabinet.
A range of battery circuit breaker boxes is available for use in installations where the battery is not
installed in the battery cabinet, in which case the appropriate battery box is fitted as close as possible
to the battery and connected to the UPS equipment as illustrated in Figure 25.
The battery circuit breaker box, used with the circuit breaker controller board, is required to protect
the battery from deep discharging and overcurrents. It also provides electrical isolation between the
UPS and the battery, permitting technical service personnel to reduce the risks involved in maintenance work to a minimum. Inside the box are connection bars for power cables arriving from the UPS
and from the battery.
NOTE
The control cables from the UPS unit to the controller board must be made using a 5-core
shielded cable located in a separate conduit to that containing the battery power cables.
The control signal cable is connected to the circuit breaker controller board through the terminal
board.
The cable shield must be earthed to prevent induced noise affecting the control operation, and a separate safety earth must be connected between the UPS unit and circuit breaker box.
The configurations in Table 9 are available, depending on the UPS power rating.
Table 9
UPS-circuit breaker configurations
UPS
Dimensions
HxWxD, mm (in)
Weight
kg (lb)
558x378x180
(22x14.9x7)
21.5 (47.4)
30 to 40 kVA
60 to 80 kVA
100 to 120 kVA
140 to 160kVA
200kVA
825x530x195
(32.4x21x7.7)
Circuit Breaker
125A 4p
200A 4p
25 (55)
400A 4p
30 (66)
400A 4p
32 (71)
500A 4p
Listed weights do not include packaging.
The BCB box contains a battery isolating circuit breaker and a circuit breaker controller board and
offers the following features:
• Short-circuit and End Of Discharge protection—The circuit-breaker (or internal UPS battery contactor when fitted) automatically opens when the EOD voltage is reached
• UPS Emergency Stop compatibility—The circuit-breaker (or internal UPS battery contactor when
fitted) opens when the emergency stop button is pressed on the UPS front panel.
NOTE
30 to 40kVA UPS models fitted with internal battery and any UPS models fitted with a Battery
Start kit contain an internal UPS battery contactor for automatic connection and
disconnection of the batteries and the battery circuit breaker undervoltage coil is not used.
Refer to 2.5 - Battery Control for details
40
Battery Installation
Figure 24 Battery circuit breaker box—30-120kVA and 140-200kVA
6
30-120kVA
Circuit Breaker Box
9
8
9
10
3
4
2
7
5
1
6
140-200kVA
Circuit Breaker Box
Table 10
Key #
Battery circuit breaker box legend
Component
1
Battery connections, positive and negative
2
Connections from UPS, positive and negative
3
Battery circuit breaker controller board
4
Battery circuit breaker
5
Plate for cabling holes (User to size and cut holes for the cables to be used)
6
Wall mounting holes
7
Earth bar
8
Insulating cover
9
Top plate
10
Hinged door
Standard cable entry is from bottom side. The baseplate can be rotated to permit top cable entry.
41
Battery Installation
Figure 25 Battery circuit breaker box connection
+
N
-
Temp NC
Sensor 12V
OUT
TMP-2 GND
W3
BCB
UPS
+
X100
UV
Battery
OUT-P
OUT-N
AUX1
AUX2
220VDC
UHW241U2
J10
X103
X104
X105
X106
Auxiliary
Contactor
UHW241C2
X7
UPS +
Black
UPS -
Red
Black
Red
X101
X108
W3
+12V
OL
GND
FB
DRV
W2
X102
Battery Battery
+
+12V
BAT-T
GND2
BAT-T
GND
USE
GND1
AUX
DRV
NOTES
1. Cable W3 supplied with temperature sensor (5m) and with BCB Box (30m)
2. Cable W2 supplied with BCB Box (30m)
3. X102 labels are 1(DRV), 2(AUX), 3(GND1), 4(USE) - refer to Table 11 for full X102 label
descriptions
4. X101 - HAZARDOUS VOLTAGE - do not connect to battery bus before authorised by the
commissioning engineer
5. X103-X106 are for connecting temperature sensors from multiple battery cabinets.
42
Battery Installation
Table 11
Battery control label description (X102)
BCBB
X-102
Ref Label
Monitor Bd
Reference
Label
Description
1 DRV
DRV
2 IN (AUX) BCB-X3
FB (IN)
on U2 Monitor
board
OL =
4 USE
On Line
Signal status
Battery circuit breaker tripping
control signal from UPS
Normal: H level voltage, BCB can close
Abnormal: L level voltage, BCB trips
Bat CB auxiliary status contact
(Open contact = CB open)
Normal: OV when BCB is closed.
Abnormal: open when BCB is open
Bat CB Board status signal
(GND = OV from BCB Bd)
Normal: 0V, the BCB Board is in use.
Abnormal:. open, the BCB Board is not
in use.
3 GND1
GND
GND1
GND1 to GND on U2 board
5 (1) +12V
P12
+12V Power supply from
Monitor Bd to Temp Monitoring
Probe & Buffer
Power available: 3W.
GND2
GND2 to GND on U2 board
X7
on U2 Monitor
GND2
board
6 (3) 0V
7 (2) Out
Buffered Bat temp Probe signal
from BCB Bd to Monitor Bd
OUT
1. Cables connected to X3 BCB must be segregated from power circuits, double insulated and of a typical 0.5 to 1mm2 cross
section area for maximum runs between 25 and 50 meters respectively.
2. Battery temperature sensing cables must be less than 10 m long.
3. 30 and 40kVA UPS models fitted with internal battery and any UPS models fitted with Battery Start kit contain an internal UPS
battery contactor for automatic connection and disconnection of the batteries and the battery circuit breaker undervoltage coil is
not used. Refer to 2.5 - Battery Control for details.
!
2.6.1
CAUTION
Leave terminals open if the corresponding facility is not used. The commissioning engineer
must program the UPS accordingly (e.g., disable battery temperature compensation, enable
internal battery contactor)
Battery Temperature Sensor—Optional
The optional external battery temperature sensor kit, supplied separately from the battery circuit
breaker, contains one probe and one temperature transport board as illustrated in Figure 26. It is
connected to the UPS Monitor Board (either directly or in case of multiple sensors, through the battery circuit breaker board - see Figures 26 and 27).
Figure 26 Single temperature sensor and monitor board—U2
Name: W2 L = 30m
Temperature
Sensor
X7
NC
12V
OUT
GND
+
IN
TMP-2
Cable W2 is packed with the temperature sensor.
43
Monitor
Board
– U2
-12V
BAT-T
GND
UPS
Battery Installation
Figure 27 Multiple temperature sensors, battery circuit breaker box and UPS module
Type: W3 L = 5m
Type: W3 L = 30m
Temperature
Sensor
X103
NC
12V
OUT
GND
+
IN
TMP-2
Temperature
Sensor
X104
NC
12V
OUT
GND
+
IN
TMP-2
X108
+12V
OUT
GND
Temperature
Sensor
X105
NC
12V
OUT
GND
+
IN
-
X7
Monitor
Board
– U2
-12V
BAT-T
GND
UPS
TMP-2
BCB Control
Board – C2
Temperature
Sensor
X106
NC
12V
OUT
GND
+
IN
TMP-2
BCB Box
Cable W3 (L=5m) is packed with the temperature sensor.
Cable W3 (L=30m) is packed with the BCB box.
NOTE:
1. Each probe consists one OT6-4 terminal and one precision temperature sensor that is
sealed in the OT6-4's terminal. The whole probe is supplied as one cable.
2. The type of temperature transport board illustrated in Figure 27 is TMP-2.
3. The signal cables in the Figure 27 must be shielded and double insulated.
4. The temperature monitoring cable must be less than 10m while the signal transmission
distance of the transport board must be less than 100m.
44
UPS Multi-Module Installation
3.0
UPS MULTI-MODULE INSTALLATION
3.1
General
The installation of a multi-module UPS configuration must follow the installation procedure for a single UPS module with the additional requirements detailed in this chapter.
In addition to the local EPO push button on the front panel of the UPS module (that stops operation of
that module), the UPS supports also a remote emergency stop to permit simultaneous multi-module
shutdown.
NOTES
1. The remote emergency power off switch must be voltage-free and Normally Open or
Normally Closed.
2. The open voltage supplied is 12VDC, < 20mA
3. This external emergency stop may be supplied with a second set of contacts that can be used
to trip incoming mains or bypass supply circuit breakers supplied by others and fitted with
remote trip units.
4. Normally Closed EPO - X2: 1&2, these terminals are supplied factory-linked on the monitor
board.
Figure 28 Emergency power off connections
UPS2
X2:3
X2:4
X2:3
X2:4
Monitor Board
Monitor Board
UPS1
EPO
UPS2
X2:1
X2:2
X2:1
X2:2
Monitor Board
UPS1
EPO
45
Monitor Board
UPS Multi-Module Installation
3.2
Paralleled UPS Modules
The basic installation procedure of a parallel system comprising two or more UPS modules is the
same as that of single module system. The following sections only introduce the installation procedures specific to the parallel system.
3.2.1
Cabinet Installation
Place the UPS modules side by side and interconnect as shown in Figure 29. The distribution panel
(external bypass cabinet) is optional but recommended for ease of maintenance and system testing.
Figure 29 Typical 1+N system block diagram with common input supply, with separate batteries and
optional output / bypass distribution panel
Supplied
by Others
Input Mains
Input Mains
Supply L1, L2, L3, N
Supply L1, L2, L3, N
Q1
Q1
UPS1
UPS2
Rectifier
Rectifier
Charger
Charger
Inverter
Inverter
Q2
Q2
Q3
Q3
Q5
Q5
L1, L2, L3, N
L1, L2, L3, N
Q1EXT
QUPS
Q2EXT
QBYP
Distribution Cabinet
To Load
NOTE
Internal maintenance bypass switch Q3 must be removed when the load exceeds the capacity of
one UPS module.
46
UPS Multi-Module Installation
Figure 30 Dry contacts, multiple UPS modules with distribution panel
Input Distribution
UPS 1
UPS 2
UPS N
M3 Board
X3
Ext. Maint. Ext. Out
M3 Board
X3
Ext. Maint. Ext. Out
M3 Board
X3
Ext. Maint. Ext. Out
Q1Ext
Q2Ext
QnExt
QByp
QUPS
To Load
3.2.2
External Protective Devices
Refer to the instructions in 1.0 - Single Module UPS Installation.
3.2.3
Power Cables
The wiring of power cables is similar to that of single module system. The Bypass and the Main input
sources must be referenced to the same neutral potential and input earth leakage monitoring devices,
if installed, must be located upstream of the common neutral sinking point. Refer to the instructions
in 1.0 - Single Module UPS Installation.
NOTE
The length and specification of power cables including the bypass input cables and UPS output
cables should be the same. This facilitates load sharing when operating in bypass mode.
47
UPS Multi-Module Installation
3.2.4
Control Cables
Intermodule Control
Shielded and double insulated control cables available in lengths of up to 30 meters must be interconnected in a ring configuration between UPS modules as shown below. The parallel control board is
mounted on the top, behind protective cover of each UPS module (refer to Figure 44). The ring configuration ensures high reliability of the control (refer to Figure 31).
Figure 31 Connection of 1+N system parallel control cables
3.3
Hot-Standby UPS Modules
3.3.1
Cabinet Installation
X1-1
X1-2
X1-1
X2-1
P1
X2-2
P2
P1
P2
X1-2
X2-1
X1-2
P4
X1-1
X2-2
X4
P3
X1-2
X2-1
P1
P2
P2
X1-1
X2-2
Parallel Board
X3
P5
X4
P4
X1-2
X4
X2-1
6
Parallel Board
X3
P5
P3
X1-1
X2-2
5
Parallel Board
X3
P5
P3
X1-2
X2-1
4
X4
P3
P2
P1
X2-2
P3
P3
X1-1
X2-1
P4
P2
X2-2
X4
P1
X4
Parallel Board
X3
P5
P1
Parallel Board
X3
P5
P4
Parallel Board
X3
P5
UPS
3
P4
2
P4
1
Place the UPS modules side by side and interconnect as shown below.
The hot standby mode comprises two series-connected UPS modules of the same rating. One module
is designated as the hot standby master (downstream), and the other module is designated as the hot
standby slave (upstream). Their roles are determined by power connection and configuration software. In normal operation, both slave and master operate in normal mode and the output from one
upstream (slave) UPS feeds the bypass input to the other (downstream, master) UPS. The output of
the downstream (master) UPS is connected to the critical load and is always synchronised to the output of the upstream (slave) UPS. If the inverter of the UPS connected to the load fails, the inverter of
the upstream (slave) UPS supplies the load through the downstream (master) UPS bypass circuit.
The system can be programmed to cycle the downstream (master) UPS between normal mode and
bypass mode so that both UPS units are equally exercised.
NOTE
If it is a hot-standby system, the master must be turned on first.
3.3.2
External Protective Devices
Refer to the instructions in 1.0 - Single Module UPS Installation.
48
UPS Multi-Module Installation
3.3.3
Power Cables
The wiring of power cables is similar to that of single module system except that the output of the
upstream UPS is fed into the bypass input of the downstream UPS, and the load is fed by the downstream UPS through its inverter or bypass. The bypass and the main input sources must be referenced to the same neutral potential and input earth leakage monitoring devices, if installed, must be
located upstream of the common neutral sinking point. Refer to the instructions in 1.0 - Single Module UPS Installation.
No control wires other than those specified for the single module configuration are required.
Figure 32 Hot standby configuration
Input Distribution
Upstream
Downstream
Mains L1,
L2, L3, N
Bypass L1,
L2, L3, N
Bypass L1,
L2, L3, N
Mains L1,
L2, L3, N
Q1
Q1
UPS1
UPS2
Rectifier
Rectifier
Charger
Charger
Inverter
Inverter
Q2
Q2
Q3
Q3
Q5
Q5
L1, L2, L3, N
L1, L2, L3, N
UPS1 Output
49
UPS Multi-Module Installation
3.4
Dual Bus System
3.4.1
Cabinet Installation
The Dual Bus System consists of two independent UPS configurations each consisting of one or more
UPS modules. Dual Bus Systems are high availability configurations suitable for loads with multiple
input terminals. For single input loads an optional Static Transfer Switch may be added and the standard Load Bus Synchroniser activated. Depending on the configuration, follow the appropriate installation instructions for each system.
Place the UPS modules side by side and interconnect as shown below.
The objective of the Dual-bus Synchronizer (DBS) is to keep the output of two independent UPS systems (or parallel systems) in synchronization. One system is designated as the master; the other is
designated as the slave. The operating modes covered comprise master and or slave operating
inverter or bypass mode.
Figure 33 Typical dual bus system configuration with static transfer switch and Load Bus Synch
Bypass Supply
Input
Rectifier
Bypass Supply
Input
Rectifier
Q1
Input
Rectifier
Q1
UPS1
Q1
UPS1
UPS1
RECTIFER
RECTIFER
CHARGER
RECTIFER
CHARGER
INVERTER
CHARGER
INVERTER
Q2
INVERTER
Q2
LBS
Q3
INTERMODULE
CONTROL CABLE
Q2
Q3
Q5
INVERTER
Q2
Q3
Q3
Q5
Q1
UPS1
RECTIFER
CHARGER
Input
Rectifier
Q5
Q5
INTERMODULE
CONTROL CABLE
STS
Load
3.4.2
External Protective Devices
Refer to the instructions supplied in 1.0 - Single Module UPS Installation.
3.4.3
Power Cables
The wiring of power cables is similar to that of single module system. The Bypass and the Main input
sources must be referenced to the same neutral potential and input earth leakage monitoring devices,
if installed, must be located upstream of the common neutral sinking point. Refer to the instructions
in 1.0 - Single Module UPS Installation
50
UPS Multi-Module Installation
3.4.4
Control Wires
For Liebert NX to NX dual bus configuration, interconnect the optional DBS cable between any DBS
ports of two parallel systems as illustrated in Figure 34.
Figure 34 Connections of a typical dual bus system utilising Load Bus Synch
UPS
Parallel Board
X3
P5
8
X2-2
X1-1
X1-2
P4
X1-2
X2-1
P1
X2-1
P2
P2
X1-1
X1-2
X4
P3
X2-2
P4
X1-1
P3
DBS Cable
P1
X2-1
Parallel Board
X3
P5
X4
P1
P2
X2-2
X1-2
P4
X1-1
P3
X2-1
P1
P2
X2-2
X4
P4
X4
Parallel Board
X3
P5
P3
Parallel Board
X3
P5
UPS
8
Parallel System I
A
Parallel System II
B
NOTE
Example shown with ring control cables (“8”) for DSB applied to two 1+1 paralleled systems.
3.4.5
Extended Dual Bus Synchronization Option (DBS Interface Box)
For Liebert NX to non- NX (whether another Liebert UPS range or not) dual bus configuration, one
DBS interface box shall be mounted on the non- Liebert NX UPS and one on the Liebert NX UPS. In
this situation, the other UPS system is always treated as a master and the following conditions are
covered:
• Master and slave are both on inverter
• Master on bypass, slave on inverter
NOTE
Extended DBS interface box is also used for extending DBS cable length up to 150 metres for
DBS configuration between two groups of NX UPS systems.
51
External Optional Cabinets
4.0
EXTERNAL OPTIONAL CABINETS
4.1
External Maintenance Bypass Cabinets
The bypass cabinet enables maintenance operations and repairs to be performed in full isolation
while also allowing the disabling of each UPS without affecting the ordinary operation of the system
(depending on the redundancy level).
The optional maintenance bypass cabinet must be used in all configurations where one internal maintenance bypass switch is insufficient to supply the full system load.
Each kVA rating has maintenance bypass cabinets sufficient to supply the full system load up to six
units in parallel power operation.
4.2
Interlock with UPS Module
Interlock the External Maintenance Bypass Switch with the operation of the UPS module(s) prevents
backfeed of the External Bypass AC power into the Inverter if an incorrect switching sequence is
used. A volt-free auxiliary status contact from external bypass switch QF3 is connected to UPS terminal X3 (MBC interface) of the parallel control board (M3).
Figure 35 External maintenance bypass cabinet with separate bypass input
4P
400V, 50Hz
4W
4P
S
Q2
Q1
Q5
4P
Q5
4P
Q5
4P
X3
UPS1
CB
Supplied
by Others
Q3
X1
Q2
Q3
Q1
400V, 50Hz
4W
X3
UPS2
CB
X1
Q3
Q2
Q1
X3
UPS3
CB
X1
52
400V, 50Hz
3 or 4W
External Optional Cabinets
EXT-Maint X3-1&2 on UPS Parallel Board M3 (leave open if no external bypass switch is used). Provides external maintenance bypass interlock protection for the UPS. Short circuit means external
bypass closed.
EXT-Out (X3-3&4) on UPS Parallel Board (leave shorted if no external output switch is used). Provides external output interlock protection for paralleled UPS modules. Short circuit means external
output switch closed.
4.3
Isolation Transformer Option
Isolation transformers are required in cases requiring galvanic isolation between the input supply
mains and the UPS.
These options are housed in cabinets and they are available for every range of UPS.
These optional cabinets provide the Top Cable entry function.
NOTE
Terminals and cabling for the battery connection is not a part of the MBP or TC cabinet.
Figure 36 Equipment arrangement—UPS, battery cabinet and top-entry Isolation Transformer Cabinet
TCE
BATTERY
cabinet
UPS
TX
FRONT
Figure 37 Single input external isolation transformer cabinet
Isolation Transformer Cabinets
QF1
3P
T1
Bypass
Supply
Q3
N
Q2
Q1
Q5
Input Mains Supply
Supplied by
Others
X3
UPS
CB
53
X1
To Load
External Optional Cabinets
Figure 38 Dual input external isolation transformer cabinet
Maintenance
Bypass Supply
Isolation Transformer Cabinets
QF2
3P
QF1
Input
Supply
3P
Q2
N
Q1
Q3
To Load
Q5
Input Mains Supply
Supplied
by Others
X3
UPS
CB
X1
Figure 39 Output external isolation transformer cabinet
Isolation Transformer Cabinets
QF5
4P
Tout
Supplied
by Others
Q2
Q1
Q5
Input Mains
Supply
X3
UPS
CB
4.4
Q3
X1
Top Cable Entry Option
Optional Top Cable entry cabinets are available for every range of UPS.
54
To Load
Installation Drawings
5.0
INSTALLATION DRAWINGS
Figure 40 Electrical connections
UPS
EARTH
TO CUSTOMER SAFETY EARTH
W2
TO CRITICAL LOAD 380/415V 50HZ
V2
U2
N
W3
POWER BUSBARS
BYPASS SUPPLY 380/415V 50HZ
V3
POWER CABLES
U3
N
CONNECTOR BARS THAT NEED TO BE REMOVED FOR DUAL INPUT SYSTEMS
W1
INPUT SUPPLY
380/415V 50HZ
V1
U1
Monitoring Board-U2
PWR FOR
MODEM &
X5
SNMP CARD
0V
12V
RS485-2
2
3
4
2
X1
INV
3
4
2
ACF
3
4
X2
EXT EPO
EPO
1
2
ENV
BtG
GEN
+12V
1
2
T_IT
AUX_I
+12V
GND
1
2
FUSE
F_FAN
T_OT
AUX_O
1
2
1
2
3
4
BFP-O
BFP-S
BFP-C
INV-O
INV-S
INV-C
ACF-O
ACF-S
ACF-C
EPO-NC
EPO-NC
EPO-NO
EPO-NO
ENV-T
3
X6
4
IN DRY
3
4
X3
3
4
BCB BOX
MBC
3
4
BCB-X3
BATTERY
X7
+
BAT-P
-
BAT-N
TO
BATTERY
P
N
TO BATTERY
DRV
FB
OL
GND
+12V
BAT-T
GND
X4
BFP
A-IN
+12V
ENV-T
GND
+
+
-
RS485-1
1
2
4
3
2
3
4
2
IN
1
DRV
5
4
55
N
OUT-N
3
7
OUT-P
AUX-1
AUX-2
BAT-N
GND2
OUT
P12
GND1
ONLINE
6
V<
N.O.
BAT-P
P
GND2
OUT
P12
4
3
2
GND (TMP-2)
OUT BATTERY TEMPERATURE
P12 TRANSPORT
Installation Drawings
Figure 41 General arrangement—30-40kVA UPS
825
1) Air inlet grille
2) Air outlet grille
3) Castors for manoevring
4) Adjustable fixing feet
5) Seismic anchors (Optional)
6) Cable entry
7) Fans
8) Operator control and
display panel
All dimensions are in mm.
56
Installation Drawings
Figure 42 Front view, door open30-40kVA NX
Internal battery trays behind
cover
5x (159 x 364 x 685mm) HWD
1) Output Switch—Q5
2) Maintenance Bypass Switch—Q3
3) Bypass Input Switch—Q2
4) Mains Input Switch—Q1
5) Monitor Board—U2
NXa 30-40kVA
Front View
57
Installation Drawings
Figure 43 Cable terminal layout—30-40kVA NX
348
323
299
258
1) Main (Rectifier) connections (N1-U1-V1-W1)
2) Bypass connections (N1-U3-V3-W3)
3) Output connections (N2-U2-V2-W2)
4) Battery connections (+/-)
4.1 > to internal battery
4.2 > to external battery
5) Earth
Note 1: For split Bypass operation ensure that the
busbars (*) between Bypass and Rectifier input
are removed.
All dimensions are in mm.
58
Installation Drawings
Figure 44 Location of parallel logic board M3 and options—30-40kVA NX
Indicator
S
k t
B tt
3
2
1
20
1. Parallel logic board
2 & 2a. Battery Ground Fault
detection, optional
3. Battery start interface,
optional
59
21
2a
Current
Transformer
W1-A35S
Installation Drawings
Figure 45 Internal battery layout and connections—30-40kVA NX
1
3
BATTERY
120.5
36
BLUE RED
+BATTERY
364
+
38.5
+
+
BATTERY
BLUE RED
38.5
+
BLUE
RED
+
BATTERY
BLUE RED
+
RED
BLUE
685
+
38.5
+
+
BATTERY
BLUE RED
+
38.5
+
BATTERY
+
BLUE
RED
1) Internal battery Fuses (+/-)
2) Ebattery connections (+/-)
3) Cable entry
4) Rectifier fuses
5) Contactor
All dimensions are in mm.
BATTER
Y
60
Installation Drawings
Figure 46 General arrangement—60-80kVA NX
FRO NT VIEW
Section A-A
TO P VIEW
1) Air inlet grille
2) Air outlet grille
3) Castors for manoevring
4) Adjustable fixing feet
5) Seismic anchors (Option)
6) Cable entry
7) Fans
8) Operator control and display panel
All dimensions are in mm.
61
Installation Drawings
Figure 47 Front view doors open—60-80kVA NX
1) Parallel logic board
2) Monitor board
3) Battery start Interface
4 and 4a) Battery Ground Fault detection
(optional)
62
Installation Drawings
Figure 48 Cable terminal layout—60-80kVA NX
U1
V1
PE
W1
U3
V3
W3
U2
V2
W2
N1
N2
U1
V1
W1
Input
1.
2.
3.
4.
5.
N1
Batt +
Batt -
N1
Batt
Main (Rectifier) connections (N1-U1-V1-W1)
Bypass connections (N1-U3-V3-W3)
Output connections (N2-U2-V2-W2)
Battery connections (+ / -)
Earth
U3
V3
Bypass
6.
7.
8.
9.
W3
U2
V2
W2
N2
Output
Mains Input isolator (Q1)
Bypass Input isolator (Q2)
Maintenance bypass isolator (Q3)
Output isolator (Q5)
NOTE
1. For split bypass operation, ensure that the busbars (*) between bypass and rectifier
input are removed.
2. All dimensions are in millimeters.
63
Installation Drawings
Figure 49 General arrangement—100-120kVA NX
825
700
1800
800
83
1
5
Front view
696
3
Side view
2
6
Top view
Base view
64
4
1) Air inlet grille
2) Air outlet grille
3) Castors
4) Adjustable fixing feet
5) Seismic anchors (option)
6) Cable entry
Installation Drawings
Figure 50 Front view, door open—100-120kVA NX
5
1) Input s witch (Q1)
2) B ypas s s witch (Q2)
3) Maintenance bypas s
s witch (Q3)
4) Output s witch (Q5)
5) Monitor board U2
1
2
3
4
Figure 51 Parallel logic board location—100-120kVA NX
Parallel cable
65
Installation Drawings
Figure 52 Cable terminal layout—100-120kVA NX
U1
U1
V1
V1
W1
W1
N1
Input
Batt +
Batt -
N1
Batt
U3
V3
Bypass
W3
U2
V2
W2
N2
Output
Figure 53 General arrangement—140-200kVA NX
2
1
1. Air inlet grille
2. Air outlet grille
3. Casters
4. Adjustable fixing feet
5. Seismic anchors (optional)
6. Cable entry
4
5 3
66
Installation Drawings
Figure 54 Front view, door open—140-200kVA NX
5
1. Input switch, Q1
2. Bypass switch, Q2
3. Maintenance bypass switch, Q3
4. Output switch, Q5
5. Monitor board, U2
1
3
2
Figure 55 Parallel logic board location—140-200kVA NX
Parallel
Cable
67
4
Installation Drawings
Figure 56 Cable terminal layout—140-200kVA NX
N1 U1
V1 W1 U3
Main Input
V3
W3
U2
Bypass
V2 W2 N3
Output
68
Battery
Installation Drawings
Figure 57 Optional external Maintenance Bypass Cabinet, 600mm wide
474
Top
View
160
190
120
50
120
260
top cable
entry 120x160
50
600
824
1600
388
100
100
585
100
Front View
Side View
175
250
175
13 (12x) diameter
50
55
152,5
100
Bottom
View
bottom cable
entry 250x100
630
571,5
55
100
28,5
55
433
55
28,5
69
Installation Drawings
Figure 58 Optional external Maintenance Bypass Cabinet, 800mm wide
539
Top
View
140
145
120
50
120
460
top cable
entry 120x160
50
825
800
1600
100
588
100
100
585
100
100
Front View
Side View
275
250
275
13 (12x)
diameter
50
55
165
100
Bottom
View
bottom cable
entry 250x100
630
559
55
28,5
55
633
55
28,5
70
Installation Drawings
Figure 59 Optional External Maintenance Bypass Cabinet, 850mm wide
479
Top
View
200
145
150
56
150
438
top cable
entry 150x200
56
850
824
1800
638
100
100
585
100
Side View
290
270
Front View
290
100
13 (12x) diameter
50
55
152,5
150
Bottom
View
630
bottom cable
entry 270x150
55
28.5
55
683
55
28.5
71
Installation Drawings
Figure 60 Cabling diagram, 30-200kVA, MBP-T cabinet, configuration 1.1.1
72
Installation Drawings
Figure 61 Cabling diagram, 30-200kVA, MBP-T cabinet, configuration 1.1.3
73
Installation Drawings
Figure 62 Cabling diagram, 30-200kVA, MBP-T cabinet, configuration 1.1.5
74
Operation
6.0
OPERATION
WARNING
!
Hazardous mains and / or battery voltage present behind covers.
No user-serviceable parts are located behind covers that require a tool for their removal. Only
qualified service personnel are authorised to remove such covers.
6.1
Introduction
The Liebert NXa Uninterruptible Power System is connected between the Mains AC input source and
the critical load to provide uninterruptible power to the latter. The power from the UPS is free from
voltage and frequency variations and from disturbances experienced at the Mains AC input supply.
This is achieved through high frequency double conversion power pulse width modulation (PWM)
associated with full digital signal processing control (DSP).
As shown in Figure 63, the AC input mains source is supplied at Q1 and converted into a DC source.
This DC source feeds a DC/DC Bidirectional Battery Converter (that ensures the battery to remain
charged at all times) and at the same time feeds the Inverter that converts the DC source into a clean
and input independent AC source. The battery powers the load through the bidirectional battery converter and through the inverter in case of an AC input mains power failure. In case of Inverter
unavailability or excessive overload, the load may also be powered from an external AC Bypass source
through input isolator Q2 and the static bypass. Besides this, if maintenance or repair of the UPS is
necessary, the UPS can support the load through the internal and manually controlled maintenance
bypass isolator Q3. With the exception of the maintenance bypass isolator, all the isolators shown are
closed during normal UPS operation.
Figure 63 Single unit block diagram with split-bypass input
Bypass
Mains
Supply
UPS Module
Maintenance Bypass Isolator Q 3
Bypass Side
Bypass Isolator Q 2
DC Bus
N
Input
Mains
Supply
Inverter
Rectifier
Input
Isolator
Q1
Input
Static
Switch
Battery
Converter
1
Battery
Circuit
Breaker
CB
2
Battery
75
Static Switch
Output
Isolator
Q5
UPS
Output
Operation
6.1.1
Split-Bypass Input
Figure 63 illustrates the Liebert NX UPS in what is known as the split-bypass configuration
wherein a separate power switch to a dedicated bypass power source that also feeds the maintenance
bypass line connects the static bypass line. Where a separate power source is not available, the bypass
and rectifier input supply connections are linked.
6.1.2
Static Transfer Switch
The circuit blocks labeled Static Switch in Figure 63 contain electronically controlled switching circuits that enable the critical load to be connected to either the inverter output or to a bypass power
source via the static bypass line. During normal system operation the load is connected to the
inverter; but in the event of a UPS overload or inverter failure, the load is automatically transferred
to the static bypass line.
To provide a clean (no-break) load transfer between the inverter output and static bypass line, the
static switch activates, connecting the load to bypass. To achieve this, the inverter output and bypass
supply must be fully synchronized during normal operating conditions. This is achieved through the
inverter control electronics, which make the inverter frequency track that of the static bypass supply,
provided that the bypass remains within an acceptable frequency window.
A manually controlled, maintenance bypass supply is incorporated into the UPS design. It enables the
critical load to be powered from the utility (bypass) supply while the UPS is shut down for routine
maintenance.
NOTE
When the UPS is operating in bypass mode or on maintenance bypass, the connected
equipment is not protected from power failures or surges and sags.
6.1.3
Battery Circuit Breaker
Any external battery is connected to UPS through a circuit breaker fitted inside the battery cabinet –
or located adjacent to the batteries where a battery cabinet is not used. This circuit breaker is closed
manually, but it contains an undervoltage release coil, which enables it to be tripped from the UPS
control electronics following certain detected faults. It also has a magnetic trip facility for overload
protection. The undervoltage release coil control is replaced by a battery contactor located inside the
UPS fitted with either internal batteries or with battery start option or both
6.1.4
Battery Temperature Compensation
For 30-40kVA UPS with internal batteries, a standard temperature probe is installed to measure the
internal battery temperature to optimize battery management. The measured temperature can be
displayed from the UPS front panel.
For UPS with external batteries, an optional battery temperature interface equally optimises the
external battery management by connecting up to four external temperature sensors from the battery
cabinet(s) to a control unit inside the UPS.
For details, refer to Figure 27.)
6.1.5
Redundant Control Power Supply Board
The UPS is equipped with two identical and fully redundant control power supply boards. Each of
them takes inputs from the AC and DC sources. When one of the sources or even if one of the control
power boards fails, the UPS system can still operate normally. This feature further enhances the reliability of the system.
6.1.6
Socket Outlet
One single-phase Shuko-type universal outlet of 3A current handling capability provides nominal
UPS output voltage of up to 3A current capacity for the ease of testing, commissioning & servicing of
the UPS.
76
Operation
6.2
Multi Module UPS—1+N
Multi-module UPS are formed by several “single unit” UPS modules to constitute “1+N”system where
groups of one or more, up to six, single units operate together for the purpose of providing additional
power or reliability or both. The load is equally shared between any paralleled UPS.
Figure 64 1+N multi-module UPS with external maintenance bypass switch
Qin UPS1
Qin UPS2
Qin UPS3
Qin Ext Byp
SUPPLIED BY OTHERS
INPUT MAINS SUPPLY
INPUT MAINS SUPPLY
BYPASS MAINS SUPPLY
L1, L2, L3, N
L1, L2, L3, N
L1, L2, L3, N
Q1
INPUT MAINS SUPPLY
BYPASS MAINS SUPPLY
L1, L2, L3, N
L1, L2, L3, N
Q1
Q1
UPS1
UPS3
UPS2
RECTIFER
RECTIFER
CHARGER
RECTIFER
CHARGER
CHARGER
INVERTER
INVERTER
Q2
INVERTER
Q2
Q2
Q3
Q3
Q3
Q5
Q5
UPS1 OUTPUT
Q5
UPS2 OUTPUT
UPS3 OUTPUT
L1, L2, L3, N
L1, L2, L3, N
Qout UPS1
L1, L2, L3, N
L1, L2, L3, N
Qout UPS3
Qout UPS2
Distribution Cabinet
Qout all UPS
Qout
BYP
Further, single unit or 1+N groups may be configured as “distributed redundant” systems with independent outputs that nevertheless are synchronised through a Load Bus Synchroniser (LBS) so that
critical loads can be seamlessly transferred from one system to another. See 6.3 - Modes of Operation for more information.
6.2.1
Features of NX Multi-Module UPS Configurations
1. The hardware and firmware of single module UPS units is completely compatible with the
requirements of a multi-module system. Multi-module configuration is achieved merely through
settings in configuration software and control cables.
2. Parallel control cables are connected in a ring, providing both performance and redundancy.
Dual-bus control cables are connected between any two UPS modules of each bus. The intelligent
paralleling logic provides the user with maximum flexibility. For example, shutting down or
starting up UPS modules in a parallel system can be done in any sequence. Transfers between
Normal and Bypass modes of operation are synchronised and self –recovering e.g. following
overloads and their clearance.
3. The total load of the multi-module system can be queried from each module’s LCD.
77
Operation
6.2.2
Requirements for Paralleling of UPS Modules
A group of paralleled modules behave as if it were one large UPS with the advantage of presenting
higher reliability. In order to assure that all modules are equally utilised and to comply with relevant
wiring rules, the following requirements apply:
1. All UPS modules must be of the same rating and must be connected to the same bypass source.
2. The bypass and the main input sources must be referenced to the same neutral potential.
3. Any RCD, Residual Current monitoring device, if installed, must be of an appropriate setting and
located upstream of the common neutral bonding point. Alternatively, the device must monitor
the combined 4-wire rectifier and split-bypass input currents of the system. Refer to the High
Leakage Current Warning on page 1.
4. The outputs of all UPS modules must be connected to a common output bus.
NOTE
Optional isolation transformers are available for applications where sources do not share the
same neutral reference or where the neutral is not available.
5. Passive bypass current equalising chokes are available as an option in systems comprising more
than three parallel redundant UPS modules (or two or more parallel capacity UPS modules).
6.3
Modes of Operation
The NX UPS is an on-line, double-conversion, reverse-transfer UPS that permits operation in these
modes:
•
•
•
•
•
•
•
•
•
6.3.1
Normal Mode
Battery Mode (Stored Energy Mode)
Auto-Restart Mode
Bypass Mode
Maintenance Mode (Manual Bypass)
ECO Mode
Parallel Redundancy Mode
Hot-Standby Mode
Frequency Converter Mode
Normal Mode
The UPS inverter continuously supplies the critical AC load. The rectifier/charger derives power from
the AC mains input source and supplies DC power to the inverter while simultaneously FLOAT or
BOOST charging its associated backup battery.
6.3.2
Battery Mode (Stored Energy Mode)
Upon failure of the AC mains input power; the inverter, which obtains power from the battery, supplies the critical AC load. There is no interruption in power to the critical load upon failure or restoration of the AC mains input power after which the “Normal Mode” operation will continue without the
necessity of user intervention.
6.3.3
Auto-Restart Mode
The battery may become exhausted following an extended AC mains failure. The inverter shuts down
when the battery reaches the End Of Discharge voltage (EOD). The UPS may be programmed to
“Auto Recovery after EOD” after a delay time. This mode and any delay time are programmed by the
commissioning engineer.
78
Operation
6.3.4
Bypass Mode
If the inverter overload capacity is exceeded, or if the inverter becomes unavailable for any reason,
the static transfer switch will perform a transfer of the load from the inverter to the bypass source,
with no interruption in power to the critical AC load. Should the inverter be asynchronous with the
bypass, the static switch will perform a transfer of the load from the inverter to the bypass with interruption in power to critical AC load. This is to avoid paralleling of unsynchronised AC sources. This
interruption is programmable but typically set to be less than 3/4 of an electrical cycle, e.g., less than
15ms (50Hz) or less than 12.5ms (60Hz).
6.3.5
Maintenance Mode (Manual Bypass)
A manual bypass switch is available to ensure continuity of supply to the critical load when the UPS
becomes unavailable e.g. during a maintenance procedure. This manual bypass switch is fitted in all
UPS modules and rated for full load of one module.
6.3.6
ECO Mode (Single UPS Only)
If ECO mode is selected, the double-conversion UPS operation is inhibited at most times for the purpose of saving energy. In this mode of operation, not unlike UPS of line-interactive or stand-by technology, the bypass is the preferred source and only when the voltage and / or frequency of the bypass
supply are beyond pre-defined and adjustable limits the critical AC load is transferred to the inverter.
This transfer takes place with an interruption of less than 3/4 of an electrical cycle, e.g., less than
15ms (50Hz) or less than 12.5ms (60Hz).
6.3.7
Parallel Redundancy Mode (System Expansion)
For higher capacity or higher reliability or both, the outputs of up to six UPS modules can programmed for directly paralleling while a built-in parallel controller in each UPS ensures automatic
load sharing.
6.3.8
Hot-Standby Mode
This is an alternative 1+1 redundancy application that ensures higher availability or better usage
control or both. Two UPS are connected in Hot Stand By mode as follows: UPS 1connects to the critical load, and UPS 2 connects to the bypass of UPS 1. The remaining AC inputs are connected to the
incoming AC mains supply. UPS 1 synchronises to the output of the UPS 2 ensuring uninterrupted
load transfer from UPS 1 to UPS 2 or vice versa. This ensures that any specified load is supplied by a
UPS while still providing a bypass path to cater for overloads. Further, the system can also be programmed to reverse UPS1 between Normal and Bypass Modes so that each UPS is equally utilised.
This interval is programmable from 1 to 4,320 hours (180 days).
6.3.9
Frequency Converter Mode
The NX UPS can be programmed into frequency converter mode for either 50Hz or 60Hz stable output frequency. The input frequency may vary from 40Hz to 70Hz. In this mode the static bypass operation is disabled, and the battery becomes optional depending on any requirement to operate in
battery mode (stored energy mode).
6.3.10 Source Share Mode (Co-Generation)
NXa modules have the capability of fully supporting their critical load while limiting the amount of
power taken from the incoming AC mains supply. Any balance of power required is supplied by the
UPS battery. This feature is useful e.g. in applications where peak-hour tariffs apply or where a generator smaller than needed feeds the UPS during mains outages. The Source Share Mode is user-activated and the ratio of the main AC input power is programmable from 20% to 100% of the rated UPS
power.
79
Operation
6.4
Battery Management—Set During Commissioning
6.4.1
Normal Function
• Constant charging current—Current can be set up to limit charging power.
• Constant boost voltage (if applicable)—Voltage of boost charging can be set as required by the
type of battery.
For Valve Regulated Lead Acid (VRLA) batteries, maximum boost charge voltage should not
exceed 2.4V / cell.
• Float Charge—Voltage of float charging can be set as required by the type of battery.
For VRLA, float charge voltage should be between 2.2V to 2.3V.
• Float Charge Temperature Compensation (optional)—A coefficient of temperature compensation can be as required by the type of battery.
• End of discharge protection (EOD)—If the battery voltage is lower than the EOD, the battery
converter will shut down and the battery is isolated to avoid further battery discharge. EOD is
adjustable from 1.6V to 1.75V per cell (VRLA) or 0.9 to 1.1 V per cell (NiCd).
• Battery Low Warning Time—Adjustable between 3 and 60 minutes. The default is 5 minutes.
6.4.2
Advanced Functions (Software Settings Performed by the Commissioning Engineer)
Battery Self-Test and Self-Service
At periodic intervals 20% of the rated capacity of the battery will be discharged automatically at a
rate equal to 15% (kW) of the rated UPS (kVA) capacity. During discharge the rectifier provides the
balance necessary to feed the load. The minimum amount of load must exceed 20% of the nominal rating of the UPS module. If the load is less than 20%, auto-discharge cannot be executed. The periodic
interval can be set from 30 to 360 days. The periodic testing can also be inhibited.
• Conditions—Battery at float charge for at least 5 hours, load 20~100% of rated UPS capacity
• Trigger—Manually through the command of Battery Maintenance Test in LCD panel or automatically
• Battery Self-Test Interval—30-360 days (default setting is 60 days)
6.5
Battery Protection (settings by commissioning engineer)
Battery Undervoltage Pre-warning
The battery undervoltage pre-warning occurs before the end of discharge. After this pre-warning, the
battery should have the capacity for 3 remaining minutes discharging with full load. The time is user
configured from 3 to 60 minutes.
Battery End of Discharging (EOD) Protection
If the battery voltage is lower than the EOD, the battery converter will be shut down. EOD is adjustable from 1.6V to 1.75V per VRLA cell (or 1.0 to 1.1 V per NiCd cell).
Battery Contactor Fault Warning
If the battery contactor monitor status is different from the drive signal, this warning will occur.
Battery Disconnect Devices
For 30- 40kVA models with internal batteries and for any model fitted with a Battery Start kit, the
UPS contains an internal contactor for automatic connection and disconnection of the batteries. The
relevant features are:
• Low battery safety cutoff
• Connect/disconnect status displayed via LCD
• Overcurrent protection
• Maximum discharging time protection (1 to 72 hours)
For models above 40kVA and not fitted with an internal contactor:
The features above (except automatic connect) are performed by connecting the external battery to
the UPS through an external battery circuit breaker, which is manually closed and electronically
tripped via the UPS control circuits.
80
Operating Procedures
7.0
OPERATING PROCEDURES
!
WARNING
Hazardous mains and / or battery voltage present behind covers.
No user-serviceable parts are located behind covers that require a tool for their removal. Only
qualified service personnel are authorised to remove such covers.
7.1
Introduction
Following installation and commissioning by an authorised service engineer, the UPS will operate in
one of the modes described in 6.3 - Modes of Operation. This chapter describes the various procedures available for the operator to intervene with the UPS mode of operation including starting up,
transferring load to bypass and shutting down.
NOTE
All the user controls and indicators mentioned in these procedures are identified in 8.0 Operator Control Panel and Display.
All power switches mounted inside the cabinet and accessible after opening the key-locked front
door are shown in Figure 63 and described in 7.0 - Operating Procedures.
7.2
Startup in Normal Mode
This procedure must be followed when turning on the UPS from a fully powered down condition - i.e.,
where the load is not being initially supplied at all or where supplied by the maintenance bypass
switch. It is assumed that the installation is complete, the system has been commissioned by authorized personnel and the external power isolators are closed.
81
Operating Procedures
In multi-module systems—perform each step of the procedure in every UPS module before proceeding to the next step.
WARNING
!
Mains Voltage will be applied to UPS output terminals.
This procedure results in mains voltage being applied to the UPS output terminals.
• Isolate and attach warning labels to any downstream load connections, as applicable.
• No operator serviceable parts are located behind covers that require a tool for removal.
• Only qualified service personnel are authorised to remove such covers.
1. Open the UPS door to gain access to the main power switches.
2. Close Bypass input power switch Q2 and UPS output power switch Q5.
Close also any external output isolation switches, where used.
The LCD becomes active and after initialization, the UPS output is powered from the bypass,
with the bypass and load indicators turned on.
The UPS Mimic LED's will indicate (refer to Figure 67):
# LED
LED Function
Status
3
Bypass indicator
Green
5
Output indicator
Green
2
Battery indicator
Red
6
Alarm indicator
Amber / red
3. Close the Rectifier AC Input Power Switch Q1.
The Rectifier indicator flashes on the UPS mimic panel during the startup of rectifier and
becomes steady green once the rectifier reaches normal operation state after about 30s.
4. Close external battery circuit breaker (where an external battery is used). This breaker is located
inside the battery cabinet (if used) or is otherwise adjacent to the battery racks
5. Following battery availability being detected by the UPS, the red battery indicator extinguishes
moments after when the battery charger starts operation.
6. Open (or confirm open) the internal Manual Bypass Power Switch Q3.
Open also any external Maintenance Bypass Switch, where used.
7. Press INVERTER ON button for two seconds.
The inverter will start up and the inverter indicator flashes while it synchronises to the bypass
voltage frequency.
After the inverter is ready, the UPS transfers from bypass to inverter, the bypass indicator turns
off, and the inverter indicator becomes steady green.
8. Check that no “Warning” message is displayed in the top right corner of the LCD Monitor and the
status of the indicators are:
# LED
LED Function
Status
1
Rectifier indicator
Green
2
Battery indicator
Off
3
Bypass indicator
Off
4
Inverter indicator
Green
5
Output indicator
Green
6
Alarm indicator
Off
The UPS is now operating in NORMAL mode.
82
Operating Procedures
7.3
Startup into ECO Mode
Applies only to a single module UPS and when programmed by the commissioning engineer to perform ECO mode control of the power delivered to the load.
Follow 7.2 - Startup in Normal Mode and observe at the end of the procedure that the mimic panel
bypass indicator remains green (indicating that the load is supplied by the bypass mains).
The UPS is now operating in ECOMODE.
7.4
Battery Test Mode Procedures
The Battery test mode procedures transfer the UPS into shared source mode wherein approximately
15% of the rated load power is supplied by the battery and the balance by the AC input mains. There
are two Battery tests to select from:
Maintenance test—verifies battery integrity and leads to a 20-percent battery discharge.
Battery Capacity test—verifies the battery’s precise capacity and leads to a full battery discharge
(until “Battery Low” alarm).
The battery test procedures are password-controlled and menu-driven. The test is immediately terminated in the event of a battery or a mains failure and the total load power is supported from the
remaining source without interruptions.
The tests can be carried out from the UPS control panel by the operator when the following conditions
are satisfied:
• The load must be between 20% and 100% of rated UPS capacity
• The battery must have been float charging for 5 hours or more.
7.4.1
Test Procedure
1. Select “Commands” window on the UPS control panel.
Use the right or left arrow keys to navigate to the “Commands” window.
2. Select desired Test.
Use “page” (F1) and up / down arrow keys (F2, F3) to highlight the desired test. Press “enter” (F4).
When prompted, enter each password digit with up arrow (F2) and use right arrow (F3) to access
next field. Press “enter” (F4) when all digits have been entered.
3. Wait until the test completes.
This tests updates the battery information used to calculate the expected back-up time (displayed
during AC input failure) and the battery capacity percentage when compared to a new battery
(displayed in normal mode).
4. Stop test.
If required, the test may be stopped before completion by selecting “Stop Test” in the “Commands”
window.
For more details on how to operate the UPS control panel refer to 8.0 - Operator Control Panel
and Display.
83
Operating Procedures
7.5
UPS Self-Test
The UPS test procedure checks the control functions of the UPS, the mimic flow chart LEDs and the
audible alarm. This self-test is password controlled and menu driven. It can be carried out from the
UPS front panel by the operator and takes 5 seconds.
7.5.1
UPS Self-Test Procedure
1. Select “Commands” window on the UPS front panel.
Use the right or left arrow keys to navigate to the “Commands” window
2. Select desired Test.
Use “page” (F1) and up / down arrow keys (F2, F3) to highlight the desired test. Press “enter” (F4).
When prompted, enter each password digit with up arrow (F2) and use right arrow (F3) to access
next field. Press “enter” (F4) when all digits have been entered.
3. Wait until the test completes.
After 5 seconds, a popup window will appear to showing the result of this diagnosis: Rectifier,
Inverter, Monitor OK or Fault
4. Stop test.
If required, the test may be stopped before completion by selecting “Stop Test” in the “Commands”
window.
For more details on operating the UPS front panel, see 8.0 - Operator Control Panel and Display.
7.6
Maintenance Bypass Procedure and UPS Shutdown
The following procedure transfers the load supply from being protected by the UPS into being connected
directly to the AC input bypass supply though a maintenance bypass switch. This switch is either:
• internal (Q3- located behind the front door) for “Single module” or “1+1 redundant multi-module”
UPS applications.
• external (located in the bypass cabinet) for “1+1 capacity” and “1+N redundant” multi-module
UPS applications – refer to Figure 64.
In multi-module systems—perform each step of the procedure in every UPS module before proceeding to the next step.
!
CAUTION
Risk of Load Interruption
Except in emergency situations, so as not to risk a short interruption in powering the load,
before initiating this bypass procedure, confirm that no WARNING status is displayed in the
top right corner of the UPS Monitor.
If a WARNING status is displayed, the operator will be prompted to confirm (“enter”) or
cancel (“ESC”) any action that can lead to load interruption.
1. Press INVERTER OFF direct access key on the UPS front panel.
The UPS inverter will shut down and the load is supplied through the Static Bypass supply.The
UPS Mimic indicator Inverter ON (4) will extinguish, the Status LED (6) turns on.
2. In “Single module” or “1+1 redundant” multi-module UPS—Close the internal maintenance
bypass power switch Q3 and any external maintenance bypass switch, if used.
3. In “1+N redundant” or “1+1 capacity” multi-module UPS—Close the external maintenance switch
only.
4. The Maintenance Bypass supply is now in parallel with the UPS Static Switch supply.
5. The display window will show messages reflecting the actions taken (i.e. Maintenance Bypass
closed, etc.).
6. Open output power switch Q5.
This ends the Bypass Procedure. The load is now powered directly from the Maintenance Bypass
supply.
NOTE
The load equipment is NOT protected from AC supply aberrations.
Proceed with the following steps to shutdown the rectifier and battery.
84
Operating Procedures
7. Press the EPO (Emergency Power Off) button at the UPS front panel of this UPS module only.
This will disable further Rectifier, Inverter, Static Switch and Battery operation. This will not
affect the manual maintenance bypass power switch.
NOTE
Do not press any remote EPO button.
8. Open the Rectifier input power switch Q1 and Static bypass input power switch Q2
9. When an external battery is connected, open external battery circuit breaker. This breaker is
located inside the battery cabinet (if used) or is otherwise adjacent to the battery racks
All mimic panel LED indications and messages will extinguish as the mains driven internal
power supplies decay.
The load is now powered from the maintenance bypass supply and the UPS is completely
shut down.
!
WARNING
Hazardous Voltage at UPS terminals
No operator-serviceable parts are located behind covers that require a tool for their removal.
Only qualified service personnel are authorised to remove such covers.
The input and output AC and DC battery and connecting terminals remains energized at
hazardous voltage levels at all times. The battery is located behind protective covers that
require a tool for their removal. inside the UPS cabinet (30 and 40kVA models), inside a freestanding battery cabinet or on open racks inside a dedicated battery room that may be locked.
Figure 65 Example of configuration for single UPS with external Maintenance Bypass Cabinet
External Maintenance Bypass Cabinet
U3/V3/W3/N3
QF3
U5/V5/W5/N5
QF2
QF4
U4/V4/W4/N4
U6/V6/W6/N6
Q3
Q2
Q5
Q1
U1/V1/W1/N1
U2/V2/W2/N2
Supplied
by Others
UPS
CB
85
Operating Procedures
7.7
Isolation of One Module in a Multi-Module System
7.7.1
Multi-Module Systems With External Output CB1
Figure 66 Typical 1+N system block diagram with common input supply, with separate batteries and
optional output / bypass distribution panel
Supplied
by Others
Input Mains
Input Mains
Supply L1, L2, L3, N
Supply L1, L2, L3, N
Q1
Q1
UPS1
UPS2
Rectifier
Rectifier
Charger
Charger
Inverter
Inverter
Q2
Q2
Q3
Q3
Q5
Q5
L1, L2, L3, N
L1, L2, L3, N
Q1EXT
QUPS
Q2EXT
QBYP
Distribution Cabinet
To Load
1. Turn Off inverter.
2. Open External Output isolator (Q1ext or Q2ext).
The UPS enters Isolation Status automatically, parallel signaling and communication becomes
masked, and output becomes inhibited.
3. Power Off unit for maintenance.
4. Power On unit.
5. Unit enters Test Mode by configuration software setting.
6. Diagonosis or testing.
7. The UPS exits Test Mode by configuration software setting.
Output becomes inhabited because of Isolation Status.
8. Return all switches to the Normal position.
9. Close External Output isolator (Q1ext or Q2ext).
The UPS exits Isolation Status automatically, parallel signaling and communication recovers,
86
Operating Procedures
output becomes enabled but interlocking works now.
10. Turn On inverter and join the parallel system.
7.7.2
Multi-Module System Without External Output Circuit Breaker 1
This procedure is indicated for isolation of one UPS module from other modules of a group of otherwise normally operating paralleled UPS modules. Only the power switches, isolators and circuit
breakers in the module to be isolated will be opened. This procedure does not require the supply of
any bypass power to the critical load.
1. Turn Off the inverter
2. Open Internal Output isolator (Q5) but keep Internal Maintenance Circuit Breaker open.
The UPS enters Isolation Status automatically, parallel signaling and communication become
masked, and internal output becomes inhibited.
3. Power Off unit for maintenance.
4. Power On unit with Internal Output isolator (Q5) open.
5. The UPS enters Test Mode by configuration software setting.
6. Diagonosis or testing.
7. The UPS exits Test Mode by configuration software setting.
Output becomes inhibited because of Isolation Status.
8. Return all switches of Unit 1 to the Normal position, including Internal Output Circuit Breaker 1.
When Internal Output isolator (Q5) is closed, unit will exit Isolation Status automatically, parallel
signaling and communication recovers, output becomes enabled but interlocking works now.
9. Turn On Inverter1 and join the parallel system.
!
WARNING
Hazardous Battery Voltage
No operator serviceable parts are located behind covers that require a tool for their removal.
Only qualified service personnel are authorised to remove such covers.
The UPS battery and connecting terminals remains energized at hazardous voltage levels at
all times. The battery is located behind protective covers that require a tool for their removal:
inside the UPS cabinet (30 and 40kVA models), inside a free-standing battery cabinet or on
open racks inside a dedicated battery room that may be locked.
87
Operating Procedures
7.8
Insertion of One Module in a Multi-Module System
This procedure is indicated to reintegrate a UPS module that has been previously isolated from other
modules of a group of paralleled UPS modules. It is assumed that the installation is complete, the system has been commissioned by authorized personnel and the external power isolators are closed.
WARNING
!
Mains voltage will be applied to UPS output terminals.
No operator serviceable parts are located behind covers that require a tool for their removal.
Only qualified service personnel are authorised to remove such covers.
1. Open the UPS door to gain access to the main power switches.
2. Open (or confirm disabled) maintenance bypass power switch Q3
3. Close input bypass power switch Q2 and UPS output power switch Q5.
(Close also any external output isolation switches, where used). The LCD display becomes active.
4. Close the Rectifier AC Input Power Switch Q1.
The Rectifier indicator flashes on the UPS mimic panel during the startup of rectifier and
becomes steady green once the rectifier reaches normal operation state after about 30s.
5. Close external battery circuit breaker QF1 (where an external battery is used). This breaker is
located inside the battery cabinet (if used) or is otherwise adjacent to the battery racks
6. Following battery availability being detected by the UPS, the red battery indicator extinguishes
moments after when the battery charger starts operation.
7. Press INVERTER ON button for two seconds.
The inverter will start up and the inverter indicator flashes while it synchronises to the load voltage frequency. After the inverter is ready, the UPS connects to the load, the inverter indicator
becomes steady green and the output indicator turns green.
8. Check that no “Warning” message is displayed in the top right corner of the LCD Monitor and the
status of the indicators as follows:
# LED
LED Function
Status
1
Rectifier indicator
green
2
Battery indicator
off
3
Bypass indicator
off
4
Inverter indicator
green
5
Output indicator
green
6
Alarm indicator
off
The UPS is now operating in NORMAL mode
88
Operating Procedures
7.9
Shutdown Procedure—Complete UPS and Load Shutdown
This procedure must be followed to completely power down the UPS and LOAD. All power switches,
isolators and circuit breakers will be opened and power will be removed from the load.
In multi-module systems – perform each step of the procedure in every UPS module before proceeding
to the next step.
!
CAUTION
The following procedure will switch off all power to the load equipment.
1. Press the EPO (Emergency Power Off) button at the UPS front panel only. This will disable
Rectifier, Inverter, Static Switch and Battery operation. The Load will be de-energised.
NOTE
Except in an emergency situation, do not press any remote EPO button.
2. Open the UPS door to gain access to the main power switches.
3. Open the Rectifier input power switch Q1
4. Open external battery circuit breaker (where an external battery is used). This breaker is located
inside the battery cabinet (if used) or is otherwise adjacent to the battery racks
5. Open Output power switch Q5
6. Open bypass input power switch Q2
7. Ensure maintenance bypass power switch Q3 is open.
8. All mimic panel LED indications and messages will extinguish as the mains driven internal
power supplies decay.
9. To completely isolate the UPS from the AC supplies, the main external power input isolator (both
isolators, where split supplies are provided for rectifier and bypass) and external output isolator
must be opened and tagged with warning labels accordingly.
!
WARNING
Hazardous Battery Voltage
No operator serviceable parts are located behind covers that require a tool for their removal.
Only qualified service personnel are authorised to remove such covers.
The UPS battery and connecting terminals remains energized at hazardous voltage levels at
all times. The battery is located behind protective covers that require a tool for their removal:
inside the UPS cabinet (30 and 40kVA models), inside a free-standing battery cabinet or on
open racks inside a dedicated battery room that may be locked.
7.10
Emergency Shutdown With EPO
This circuit has been designed to switch off the UPS in emergency conditions (i.e., fire, flood, etc.). The
system will turn off the rectifier, inverter and stop powering the load immediately (including the
inverter and bypass), and the battery stops charging or discharging.
If the input utility is present, the UPS’s controls will remain active; however, the output will be
turned off. To remove all power from the UPS, the external feeder breaker should be opened.
89
Operating Procedures
7.11
Reset After Shutdown for Emergency Stop (EPO Action) or Other Conditions
Once all appropriate measures have been taken to correct the problem indicated by the alarm message appearing on the operator control panel display, carry out this procedure to restore the UPS to
regular operation following an EPO action or for the following reasons: Inverter Overtemperature,
Cut-off Overload, Battery Overvoltage, excessive switching (BYP: XFER COUNT BLOCK), etc.
When the user confirms that the fault is cleared & the remote EPO signal is not active:
1. Press the FAULT CLEAR button to let the system exit the Emergency Off state.
2. Press the INVERTER ON button on the right side of the operator control panel for longer than
2 seconds.
NOTE:
UPS manufactured before March 2006 may first require a full power down, i.e., manual
opening of the input isolators, for the "Fault Clear" to take effect
NOTE
The rectifier will start again, and the bypass will begin to power the load (for units with
internal battery contactor installed, the battery contactor will close). The Rectifier indicator
flashes while the rectifier is starting up. When the rectifier enters the normal operation state
(about 30 seconds), the rectifier indicator turns green.
NOTE
The rectifier will be turned On automatically when the overtemperature fault disappears at 5
minutes after the disappearance of overtemperature signals.
After the EPO button is pressed, if the input utility is removed, the UPS will shut down completely.
When input utility returns, if the Bypass input power switch (Q2) and UPS output power switch (Q5)
are closed, the UPS will startup on Bypass. There will be power at the output terminals of the UPS.
!
7.12
WARNING
If the internal Manual Bypass Power Switch (Q3) is closed and input utility is present, there
will be power at the output terminals of the UPS.
Auto Restart
When the main and bypass sources fail, the UPS draws power from the battery system to supply the
load until the batteries are depleted. When the UPS reaches its end of discharge (EOD) threshold, it
will shut down.
The UPS will automatically restart and enable output power:
• After utility power is restored
• If “Auto Recovery after EOD Enabling” is enabled
• After the “Auto Recovery after EOD Delay Time” expires (the default delay is 10 minutes) .
If the “Auto Recovery after EOD Enabling” feature is disabled, the user may restart the system manually by pressing “Fault Clear” button.
90
Operating Procedures
7.13
Language Selection
The LCD menus and data display are available in 12 languages: Chinese, Dutch, English, French,
German, Italian, Japanese, Polish, Portuguese, Russian, Spanish and Swedish.To select a different
language than the one being displayed:
1. From the main menu, press the F1 (shift) key to move the cursor to the menu at the top of the
screen.
2. Press F2 and F3 (left and right arrows) as needed to select the Language menu.
3. Press F1 (shift) to move the cursor to the data and settings area of the LCD.
4. Use F2 and F3 (up and down) to select the required language.
5. Press the F4 (enter) key to accept the language selection.
6. Return to the main menu by repeatedly pressing F1 (ESC) as needed; all text on the LCD will now
be displayed in the selected language.
7.14
Changing the Current Date and Time
To change the system date and time:
1. From the main menu, press the F1 (shift) key to move the cursor to the menu at the top of the
screen.
2. Press F2 and F3 (left and right arrows) as needed to select the Settings menu.
3. Press F1 (shift) to move the cursor to the data and settings area of the LCD.
4. Use F2 and F3 (up and down) to select the Date & Time option, then press F4 (enter).
5. Position the cursor on the row in which the date and time are displayed, then press F4 (enter).
6. Using the F2 and F3 (up and down) keys, enter the current time and date information.
7. Press F4 (enter) to save the settings, then press F1 (ESC) to return to the main menu.
7.15
Command Password
Password protection is used to limit the control functions accessible to the operator. The default password is 12345. This password provides access to UPS and battery test functions.
91
Operator Control Panel and Display
8.0
OPERATOR CONTROL PANEL AND DISPLAY
8.1
Introduction
The operator control panel and display is located on the front door of the UPS. The panel is the access
point for operator control and monitoring of all measured parameters, UPS and battery status and of
event and alarm logs.
Figure 67 UPS control and display panel
The operator control panel is divided into three functional areas
Mimic Power Flow Chart
Graphic LCD monitor with menu keys
Direct Access keys
6
3
Status
1
4
Liebert NX
200kVA 3X3
2005-10-22
Single
17:32:20
Normal
8
5
Bypass
2
7
Output
L1-N/L2
L1-N/L2 voltage (V) 229.5
L-N current (A)
24.5
Frequency (Hz)
49.97
L-L voltage (V)
397.5
Power Factor
0.99
Rotary SW. normal pos.
Manual turn on
Normal mode
Load
L2-N/L3
229.5
24.5
49.97
397.5
1.00
07-07
07-07
07-07
L3-N/L1
229.5
24.5
49.97
397.5
0.99
EPO
INVERTER ON
INVERTER OFF
FAULT CLEAR
SILENCE ON /OFF
17:24
17:29
17:30
?
F1
Table 12
F2
F3
F4
HELP
UPS control and display panel components
Component #
Button
Function
Function
1
Rectifier (Input AC to DC)
EPO
Emergency Power Off button
2
Battery (DC Back-up)
Inverter ON
Inverter start button
3
Bypass Input
Inverter OFF
Inverter shutdown button
4
Inverter (DC to AC)
Fault Clear
Reset button
5
Load (AC Output)
Silence On/Off
Audible Alarm Mute
6
UPS Status and Alarm indicator
7
Audible Alarm (Buzzer)_
8
Emergency Power Off Button cover
—
F1-F4, Help
92
—
—
LCD Menu keys
—
Operator Control Panel and Display
8.1.1
Mimic Power Flow
The LED mounted on the mimic flow chart represent the various power paths and current UPS operational status.
Table 13
Green
Rectifier in Normal Operation
Flashing
Green
Input AC Normal, but rectifier not operating
Red
Rectifier Failed
Off
Rectifier Not operating, Input AC Not Available or out of normal range
Table 14
Battery indicator—2
Green
Battery Normal, but discharging and powering the load
Flashing
Green
Battery End of Discharge pre-warning
Red
Battery abnormal (Failed, Absent or Polarity Reversed) or Battery
Converter abnormal
(Failed, overcurrent, overtemperature)
Off
Battery and Converter Normal, Battery charging.
Table 15
Bypass indicator—3
Green
Load on Bypass power
Red
Bypass not available, out of normal range or Static bypass switch fault.
Off
Bypass Normal, load not on bypass
Table 16
Inverter indicator—4
Green
Inverter Normal and powering the load
Flashing
Green
Inverter ON, starting up, synchronising,
or standing by (ECO mode)
Red
Inverter failed
Off
Inverter not operating
Table 17
Load indicator—5
Green
UPS output ON and Normal
Red
UPS output ON and Overloaded
Off
UPS output OFF.
Table 18
8.1.2
Rectifier indicator—1
Status (Alarm) indicator—6
Green
Normal Operation
Yellow
UPS Warning e.g. AC Input Failure
Red
UPS fault e.g. Fuse or Hardware failure
Audible Alarm (Buzzer)
UPS activity is accompanied by the following sounds
Table 19
Audible alarm key
Single beep
Direct Access key acknowledgement
One beep
per second
UPS Warning e.g. AC Input Failure
Continuous
beep
Fault e.g. Fuse or Hardware failure
93
Operator Control Panel and Display
8.1.3
Direct Access Push Buttons (Keys)
Emergency Power Off (EPO)
Disconnects Power to the Load. Disables rectifier, inverter, static bypass
and battery operation.
Inverter ON
Enables Inverter Operation
Inverter OFF
Disables Inverter Operation
Fault clear
Resets blocked UPS functions (subject to any fault being cleared)
Silence ON/OFF
Toggle type buzzer mute. Any new fault re-enables the buzzer.
Press and hold Direct Access key briefly until acknowledged by a single beep.
8.1.4
LCD Monitor and Menu keys
The user-friendly and menu-driven 320 x 240 dot graphic LCD monitor displays real time data and at
the same time stores 512 historical records that can retrieve for reference and diagnosis.
The user can perform commands or easily browse through the input, output, load and battery parameters. For quick reference, the UPS status and any warnings are always highlighted without the need
of navigating through the menu. The versions of converter firmware, inverter firmware and internal
monitor firmware can also be displayed on the LCD.
Menu keys F1 to F4 are used to navigate within the graphic LCD monitor windows.
Table 20
Menu key Icons and their meaning
Key
F1
F2
F3
F4
Help
?
Window Type 1
LEFT
RIGHT
ENTER
Next Data Window
HELP
ESC
Window Type 2
Escape
UP
DOWN
Figure 68 Graphic LCD monitor windows and keypad
Liebert NX
200kVA 3X3
2005-10-22
Unit #1
Bypass
Main
A(AB)
220
20.5
50.1
380
0.99
Vphase V
Iphase A
Freq. Hz
Vline V
P.F.
Input breaker closed
Manual turn on
UPS in normal mode
17:32:20
Normal
Output
B(BC)
220
20.5
50.1
380
0.99
C(CA)
220
20.5
50.1
380
0.99
01-12 12:28:16
01-12 12:30:06
01-22 12:30:16
?
F1
F2
F3
94
F4
HELP
1 - UPS System
Window
2 - UPS Menu
Window
3 - UPS Data
Window
4 - Current Record
Window
5 - Keypad Window
Operator Control Panel and Display
The function of keys F1 to F4 is shown by a self-explanatory icon as appropriate for the particular
window. As shown in Figure 68 above, pressing F1 moves the cursor (resting in “OUTPUT”) from the
UPS Menu Window (2) to current record window (4) where it would first rest in “Input breaker closed’.
In a similar manner, pressing F2 would move the cursor from the Output data window to the Bypass
data window.
The summary menu tree is shown below. Refer to 8.2 - All Status and Event Messages Displayed
on the UPS Front Panel for a detailed description of each menu item.
Figure 69 Menu tree
Mains (input)
TX Input *
Bypass
Output
TX Output **
L-N voltage (V)
L-N current (A)
Frequency (Hz)
L-L voltage (V)
Power factor
L-N voltage (V)
L-L voltage (V)
L-N voltage (V)
Frequency (Hz)
L-L voltage (V)
L-N voltage (V)
L-N current (A)
Frequency (Hz)
L-L voltage (V)
Power factor
L-N voltage (V)
L-L voltage (V)
Load
System
Battery
Records
Sout (kVA)
Pout (kW)
Qout (kVAR)
Loadlevel %
Crest factor
Sout (kVA)
Pout (kW)
Qout (kVAR)
Single unit, no
parallel data
Battery voltage (V)
Battery current (A)
Battery temperature (°C)
Remain Time Min.
Battery capacity (%)
Battery boost charging
Battery float charging
Battery disconnected
(history log)
Language
Settings
Command
Version
(Choices for
display)
Display contrast
Date format set
Date & time
Comm1 baud rate
Comm2 baud rate
Comm3 baud rate
Communication address
Communication mode
Callback times
Phone No.1
Phone No.2
Phone No.3
Command password
Battery maintenance test
Battery capacity test
System test
Stop testing
Freshening Charge
Stop Freshening Charge
UPS version
UPS model
* When configured, input transformer voltages are
displayed on the front LCD. When not activated, the
values are hidden.
** When configured, output transformer voltages are
displayed on the front LCD. When not activated, the
values are hidden.
95
Operator Control Panel and Display
8.1.5
Detailed Description of Menu Items
The description that follows refers to the graphic LCD monitor window shown on Figure 68.
UPS System Window: This fixed-pane window displays current time and date and identifies the UPS,
its configuration and its status.
Table 21
UPS system window
Description
Explanation
Liebert NX
UPS family name
2005-10-22
YYYY-MM-DD (see Settings menu for other date formats)
12:30:36
Current Time (24 hr HH:MM:SS format)
200kVA-3x3
200kVA = UPS rated output, 3 x 3 = 3-phase input and output
(Configuration)
Single = single double-conversion unit
ECO = single stand-by unit with double-conversion fall-back
Master = master in a 1+1 Hot Stand By system
Slave = slave in a 1+1 Hot Stand By system
Unit # 1 = of max 6 double-conversion units in a parallel system
Single, ECO, Master, Slave or Unit # 1
(Status)
Normal, Warning or Fault
Normal = UPS operating Normal
Warning = System attention required, e.g. AC Input Failure
Fault = UPS Fuse or Hardware Failure
Menu and Data Window
Use the horizontal arrow keys to navigate between any of the selectable menu and data windows.
Table 22
Menu
Type
Mains
(input)
TX Input
Bypass
Output
TX Output
Load
Descriptions of UPS menus and data window items
Item Type
Explanation
L-N voltage (V)
Phase voltage
L-N current (A)
Phase current
Frequency (Hz)
Input frequency
L-L voltage (v
Line-line voltage
Power factor
Power factor
L-N voltage (V)
Phase voltage
L-L voltage (V)
Line-line voltage
L-N voltage (V)
Phase voltage
Frequency (Hz)
Bypass frequency
L-L voltage (A)
Line-line voltage
L-N voltage (V)
Phase voltage
L-N current (A)
Phase current
Frequency (Hz)
Input frequency
L-L voltage (V)
Line-line voltage
Power factor
Power factor
L-N voltage (V)
Phase voltage
L-L voltage (V)
Line-line voltage
Sout (kVA)
Sout: Apparent power
Pout (kW)
Pout: Active power
Qout (kVAR)
Qout: Reactive power
Loadlevel %
The percent of the UPS rating load
Crest factor
Output current Crest Factor
96
Operator Control Panel and Display
Table 22
Menu
Type
System
Battery
Descriptions of UPS menus and data window items (continued)
Item Type
Explanation
Sout (kVA)
Sout: Apparent power
Pout (kW)
Pout: Active power
Qout (kVAR)
Qout: Reactive power
Single unit, no parallel data
When configured as a single unit, UPS has only native load, no system
load.
Battery voltage (V)
Battery bus voltage
Battery current (A)
Battery bus current
Battery temperature (°C)
Internal battery temperature °C
Remain Time Min.
Battery run time remaining
Battery capacity (%)
Percentage of battery life remaining
Battery boost charging
Battery is boost charging
Battery float charging
Battery is float charging
Battery disconnected
Battery is not connected
Records
(history log)
Displays all records in the history log
Language
(choices for text displayed)
User may select any of 12 languages for LCD text.
Display contrast
Adjust the LCD display contrast
Date format set
Choose the format for date display: M/D/Y, D/M/Y, M/D/Y, Y/M/D
Date & time
Set the date and time
Comm1 baud rate
Communication baud rate setting for Intellislot 1
Comm2 baud rate
Communication baud rate setting for Intellislot 2
Settings
Command
(start/stop
battery &
system
tests)
Version
Comm3 baud rate
Communication baud rate setting for Intellislot 3
Communication address
This setting is applicable to RS485 communication mode
Communication mode
Communication Mode Setting
Callback times
When Intellislot 1 Communication mode is Modem, this parameter sets
the number of times a number is redialed to send an alarm notification.
Phone No.1
When Intellislot 1 Communication mode is Modem, this is the first
phone number to be dialed (to send an alarm notification).
Phone No.2
When Intellislot 1 Communication mode is Modem, this is the second
phone number to be dialed (to send an alarm notification).
Phone No.3
When Intellislot 1 Communication mode is Modem, this is the third
phone number to be dialed (to send an alarm notification).
Command password
User can modify the command password.
Battery maintenance test
This test performs a partial discharge of the battery to obtain a rough
estimate of the battery capacity. Load must be between 20% and 80%.
Battery capacity test
This test performs a full discharge of the battery to obtain a precise
measure of the battery capacity. Load must be between 20% and 80%.
System test
This is a self-test of the UPS. When the user activates this function, a
pop-up window appears about 5 seconds later to show the results.
Stop testing
Manually stops a battery maintenance test, battery capacity test or
system test.
Freshening Charge
This command will allow a temporary Equalize charge for the batteries.
This charge is configurable for 1 to 36 hours
Stop Freshening Charge
Manually stops a Freshening Charge
UPS version
Provides UPS firmware version numbers for the inverter, rectifier and
software display board.
UPS model
Provides UPS model information—for example, 208V-60Hz.
97
Operator Control Panel and Display
Current Record Window
Keeps a log the events that resulted in the current mode of operation. Ignores transient conditions
that have been resolved.
Use “page” (F1) and up / down arrow to read the events.
For a complete history log, refer to the Records tab of the Menu and Data Window.
Refer to Table 23 for a complete list of supported status messages.
8.2
All Status and Event Messages Displayed on the UPS Front Panel
This is the complete list of UPS events and status messages supported for display in either the Record
window (Historic data) or in the Current window (Prevailing data) as described in 8.1.4 - LCD Monitor and Menu keys.
Table 23
UPS messages
Message
Description / Suggested Action (if any)
Inverter Comm. Fail
Internal RS485 communication failure between monitor and inverter
Rectifier Comm. Fail
Internal RS485 communication failure between monitor and rectifier
Parallel Comm. Fail
The CAN communication between different UPSs within a parallel system fails.
1.Check if there are some UPSs not powered on in the parallel system. If so, power
on these UPSs and check if the alarm disappears.
2. Press Fault Clear push button.
Battery Overtemp.
The Battery temperature is over limit. Check the battery temperature and ventilation
Ambient Overtemp.
The Ambient temperature is over limit. Check the ventilation of UPS room.
Battery Fault
Battery detected faulty (Reserved)
Replace Battery
Battery test failed, Battery should be replaced.
Battery Low Pre-warning
Before the end of discharge, battery undervoltage pre-warning should occur. After
this pre-warning, battery should have the capacity for 3 minutes discharging with full
load. The time is user-configured from 3 to 60 minutes.
Shut down the load in time.
Battery End of Discharge
Inverter turned off due to low battery voltage. Check the utility failure and try to
recover it.
Mains Volt. Abnormal
Mains Voltage exceeds the upper or lower limit and results in rectifier shutdown.
Check the input line-to-neutral voltage amplitude of rectifier.
Mains Undervoltage
Mains Voltage is undervoltage with derated load.
Check the input line-to-line voltage amplitude of rectifier
Mains Freq. Abnormal
Mains frequency is out of limit range and results in rectifier shutdown.
Check the rectifier’s input voltage frequency
Rectifier Fault
Rectifier detected faulty. Rectifier shuts down. Battery discharges.
Rectifier Overtemp.
The temperature of heat sink is too high to keep the rectifier running.
The UPS can recover automatically. Check the environment and ventilation.
Batt. Contactor Fail
Battery contactor or circuit breaker not responding to control signals.
Batt. Charger Fault
The voltage of the battery charger is too high.
Control Power 1 Fail
UPS operates but Redundant Control Power is not available.
Mains Phase Reversed
AC Input phase sequence is reversed.
Rectifier Overcurrent
Rectifier is overloaded.
Soft Start Fail
Rectifier could not start due to low DC bus voltage
98
Operator Control Panel and Display
Table 23
UPS messages
Message
Description / Suggested Action (if any)
Bypass Unable to Trace
This alarm is triggered by an inverter software routine when the amplitude or
frequency of bypass voltage is beyond the normal range.
The amplitude threshold is fixed for positive and negative 10% rating.
This alarm automatically resets once the bypass voltage goes normal.
1. First verify that the bypass voltage and frequency displayed on the panel is within
the selected range. Note here the rated voltage and frequency are specified by
“Output voltage level” and “Output frequency level” respectively.
2. If the displayed voltage is believed to be abnormal, then verify the bypass voltage
and frequency presented to the UPS. Check the external supply if it is found to be
faulty.
Bypass Abnormal
This alarm is triggered by an inverter software routine when the amplitude or
frequency of bypass voltage exceeds the limit.
This alarm automatically resets once the bypass voltage goes normal.
First check if there are some relevant alarms such as “Bypass disconnect open”,
“Bypass phase reverse” and “Mains neutral lost”. If they appear, solve them first.
1. Then verify that the bypass voltage and frequency displayed on the panel is
within the bypass limit. Note here the rated voltage and frequency are specified by
“Output voltage level” and “Output frequency level” respectively.
2. If the displayed voltage is believed to be abnormal, then verify the bypass voltage
and frequency presented to the UPS. Check the external bypass supply if it is found
to be faulty. If the utility is likely to trigger this alarm frequently, the bypass limit can
be changed a little larger through the configuration software according to the
customer’s agreement.
Inverter Asynchronous
This alarm is triggered by an inverter software routine when the inverter and bypass
waveforms are misaligned by more than 6 degrees in phase. This alarm resets
automatically once the condition is no longer true.
1. First check if the alarm “Bypass unable to trace” or “Bypass abnormal” occurs. If
so, solve it first.
2. Verify the waveform of the bypass voltage. If it is too distorted, ask the customer
to verify and seek any possible measurements.
Inverter Fault
Inverter output voltage beyond limits. Load transfers to bypass.
Inverter Overtemp.
The temperature of the inverter heat sink is too high to keep inverter running.
This alarm is triggered by the signal from a temperature monitoring thermostat on
the inverter bridge heat sink.
The UPS will recover automatically after a 5 minute delay from the disappearance
of the overtemperature signal.
If the overtemperature condition is true, then check for and verify:
1. high ambient air temperature.
2. blocked cooling airway.
3. any fan failure.
4. prolonged inverter overload
Fan Fault
At least one of the cooling fans has failed
Inverter STS Fail
At least one of the static switches of inverter side is open or short circuit. This fault is
locked until power off.
Bypass STS Fail
At least one of the static switches of bypass side is open or short circuit. This fault is
locked until power off
Operation Invalid
This record is registered following an incorrect operation:
Output Fuse Fail
At least one of the inverter output fuses is blown. Inverter shuts down. Load
transfers to bypass.
Control Power 2 Fail
UPS operates but Redundant Control Power is not available.
Unit Over load
The UPS is confirmed to be overload when the load arises above 105% nominal
rating.
The alarm automatically resets once the overload condition is removed.
1. Confirm that the alarm is true by checking the load percent indicated on the LCD
panel to determine which phase is being overloaded.
2. If the alarm is true, measure the actual output current to verify that the indications
are valid.
Disconnect unnecessary load and ensure the safety. In a parallel system, a severe
load sharing error can also leads to the alarm.
99
Operator Control Panel and Display
Table 23
UPS messages
Message
Description / Suggested Action (if any)
System Over load
The UPS parallel system is confirmed to overload when the total load arises above
105% nominal rating for the set basic number of UPSs. The alarm automatically
resets once the overload condition is removed.
1. Confirm that the alarm is true by checking the system load percent indicated on
the LCD panel to determine which phase is being overloaded.
2. If the alarm is true, measure the actual output current to verify that the indications
are valid.
Disconnect unnecessary load and ensure the safety. In a parallel system, a severe
load sharing error can also leads to the alarm.
Unit Over load Timeout
The UPS is confirmed to overload and the overload times out.
Note 1: the highest loaded phase will indicate overload timing-out first.
Note 2: When the timer is active then alarm “unit overload” should also be active as
the load is above nominal.
Note 3: When the timer has expired, the inverter Static Switch is opened and the
load transferred to bypass. The inverter shutdown and will restart after 10 seconds.
Note 4: If the load decreases lower than 95% after 5 minutes, the system will
transfer back to inverter mode.
Confirm that the alarm is genuine by checking the load percent indicated on the
LCD. If an overload is indicated then check the load, and investigate any additional
load connected prior to the alarm (if applicable).
Byp. Abnormal Shutdown
Both bypass and inverter voltages unavailable. Load interruption
Inverter Over Current
Inverter Pulse Width Modulation module overloaded.
Bypass Phase Reversed
The phase sequence direction of bypass voltage is reversed.
Normally, the phase of phase B lags 120 degrees behind phase A, and the phase of
phase C lags 120 degrees behind phase B.
Verify that the phase rotation of the bypass supply presented to the UPS is correct,
and rectify it if it is found to be in error
Load Impact Transfer
A transfer to bypass occurred due to a large step load. The UPS should recover
automatically. Turn on connected equipment in sequential order to reduce the step
loading of the inverter.
Transfer Time-out
The load is on bypass power due to excessive number of transfers that occurred
within the last hour.
The UPS will recover automatically and will transfer the load back to inverter power
within an hour.
Load Sharing Fault
UPS modules within a parallel system are not sharing the load current equally.
DC Bus Abnormal
DC input voltage to inverter beyond limits. Inverter shuts down. Load transfers to
bypass.
System Transfer
The whole paralleled UPS system transferred to bypass at the same time. This
message will appear on the UPS which passive transfer to bypass
Parallel Board Fault
Malfunction of the paralleling control circuits of this UPS module. Can cause
“System Transfer” to bypass.
DC Bus Over Voltage
Rectifier, inverter and battery converter were shutdown because DC bus voltage is
too high. Check whether there is a fault in rectifier side. If no, then check whether
overload occurs. Restart the inverter after resetting the fault
Parallel Connect Fault
The parallel cables are not connected correctly in a parallel system.
Reset the fault by pressing the “fault clear” button, then restart the inverter by
pressing the “inverter on” button.
Bypass Over Current
Bypass current is over limit above 135% rating. The UPS just alarms and does
nothing.
LBS Active
Load Bus Synchronisation is active. The UPS is acting as an LBS master or slave in
a dual bus configuration.
Setting Save Error
History records not saved. (Reserved)
Mains Neutral Lost
AC Input mains reference neutral not detected.
Protocol version clash
Firmware incompatibility between Monitor Board and Digital Signal Processor
Board.
Battery ground fault
Battery leakage to ground detected (option)
Inv. turned On Manually
Manual Turn On via front panel
100
Operator Control Panel and Display
Table 23
UPS messages
Message
Description / Suggested Action (if any)
Inv. turned Off Manually
Manual Turn Off via front panel
EPO
Emergency Power Off direct access key pressed or external command received
Transfer Confirm
Prompt to press “enter” key to acknowledge that an interrupted load transfer to
bypass will happen.
Transfer Cancel
Prompt to press “ESC” key to avoid that an interrupted load transfer to bypass will
happen.
Unit Off Confirm
Prompt to press “enter” key to acknowledge that the UPS will be disconnected from
other paralleled UPS modules.
System Off Confirm
Prompt to press “enter” key to acknowledge that the all paralleled UPS will be
disconnected from the load.
Fault Reset
Fault clear direct access key pressed
Alarm Silence
Silence On/Off direct access key pressed
Turn On Fail
Inverter failed to turn on when Inverter On direct access key was pressed. This may
be as a result of Invalid Operation (Maintenance bypass on) or DC bus or rectifier
not ready.
Alarm Reset
Fault clear or Silence On/Off direct access key pressed
Bypass Mode
Load supplied from AC input bypass supply.
Normal Mode
Load supplied from Inverter output through double conversion of the AC mains input
supply.
Battery Mode
Load supplied from Inverter output through double conversion of the Battery supply.
Source share mode
Load supplied from Inverter output through shared double conversion of the AC
mains input supply and of the Battery supply.
UPS Shutdown
UPS Shutdown, output power-down
Check UPS Output
Inverter off during normal startup (diagnostics information only)
Generator Connected
Generator active signal received. Source share mode may be activated pending
UPS settings.
BCB open
Battery Circuit Breaker status (open)
BCB closed
Battery Circuit Breaker status (closed)
Battery Float Charging
Battery status (Float charge mode)
Battery Boost Charging
Battery status (Boost charge mode)
Battery Discharging
Battery status (discharge mode)
Battery Period Testing
Automatic periodic battery maintenance discharge test (20% capacity discharge)
Batt. Capacity Testing
User initiated battery capacity discharge test (100% capacity discharge)
Batt. Maint. Testing
User initiated maintenance discharge test (20% capacity discharge)
UPS System Testing
User initiated UPS self test
Inverter in Setting
Inverter starting up and synchronising
Rectifier in Setting
Rectifier starting up and synchronising
MBP-T cabinet Fan Fault
Maintenance bypass cabinet fans fault.
Ext Input TX Overtemp
External Input Isolation Transformer Over Temperature
Ext Output TX Overtemp
External Output Isolation Transformer Over Temperature
Battery Room Alarm
Environment in Battery Room Needs Attention
Rotary Sw. Test Pos.
Rotary switch is in test position.
Rotary Sw. Normal Pos.
Rotary switch is in normal position.
Rotary Sw. Bypass Pos.
Rotary switch is in bypass position.
Rotary Sw. Maint. Pos.
Rotary switch is in maintenance position.
Battery Contactor Open
Battery Contactor Open
Battery Contactor Close
Battery Contactor Closed
Battery Reverse
Connect the battery again and check the wiring of batteries
No Battery
Check the battery and the wiring of batteries
101
Operator Control Panel and Display
Table 23
UPS messages
Message
Description / Suggested Action (if any)
Auto start
After UPS was shutdown at EOD, inverter auto starts when utility restore
REC FLASH UPDATE
Rectifier firmware is being updated
INV FLASH UPDATE
Inverter firmware is being updated
MONITOR FLASH UPDATE
Monitor firmware is being updated
Input contactor fault
Input contactor fault
Contactor P.S. 1 fault
Contactor Power Supply board 1 Fault
Contactor P.S. 2 fault
Contactor Power Supply board 2 Fault
LBS abnormal
LBS is abnormal
DSP firmware error
The inverter firmware does not match with the rectifier firmware.
Input Fuse
Fail Internal AC Input Fuse to Rectifier Failed. Rectifier shuts down. Battery
discharges. Not applicable for 30-40kVA models.
Input Disconnect Open
AC mains input power switch open
Input Disconnect Closed
AC mains input power switch closed
Maint. Disconnect Open
Maintenance bypass power switch open
Maint. Disconnect Closed
Maintenance bypass power switch closed
Bypass Disconnect Open
AC bypass input power switch open
Bypass Disconnect Closed
AC bypass input power switch closed
Output Disconnect Open
UPS Output power switch open
Output Disconnect closed
UPS Output power switch closed
Input Inductor Overtemp.
Overheating of Rectifier input filter choke. Rectifier shuts down. Battery discharges.
Balancer Fault
Internal VDC(+) and VDC(-) off-set by over 50V exceeding the Inverter DC offset
compensation capacity. Inverter shuts down. Load transfers to bypass.
Balancer Over Current
Internal Inverter DC off-set balancing IGBT current rating exceeded 300%. Inverter
shuts down. Load transfers to bypass.
Balancer overtemp.
Inverter voltage offset control choke overheated. Inverter shuts down. Load
transfers to bypass.
Inv. Inductor Overtemp.
Inverter output filter choke overheated. Inverter shuts down. Load transfers to
bypass.
Batt. Converter Fault
Battery converter output voltage beyond limits or battery fuse failed. Battery
converter shuts down. Battety backup not available.
Batt. Conv. Over. Curr.
Battery converter overloaded. Battery converter shuts down. Battery backup not
available.
Batt. Converter Overtemp.
Overheating of Battery converter heatsinks. Battery converter shuts down. Battery
backup not available.
Output Disabled
UPS Output Disabled (test mode)
102
Operator Control Panel and Display
8.3
Prompt (Pop-Up) Windows
The prompt window is displayed during the operation of the system to alert the user to certain conditions and / or to require user confirmation of a command.
Table 24
Prompt windows, meanings
Prompt
Meaning
Transfer with interrupt, please confirm or cancel
Inverter and Bypass supplies are not synchronised and
any load transfer between the supplies will cause a brief
load interruption.
The load is too high to be transferred with interrupt
The total load must be less than the capacity of one unit
to allow a parallel system to perform an interrupted
transfer from bypass to inverter.
This Operation Leads to Output Shutdown, Confirm or
Cancel
No alternative supply is available and any Inverter Off
operation will cause the load to be de-energised.
This operation leads to inverter overload, confirm or
cancel
The turn-off this inverter will lead to the overload of
remaining inverter(s) in a parallel system.
Turn on more UPS to carry current load
The number of paralleled inverters already turned on is
insufficient to carry the existing load.
Battery will be depleted, confirm
Battery Capacity test discharges the battery 100%
System self test finished - everything is ok.
No action required
System self test finished - Please check the current
warnings.
Check “Current Records” window
Enter control password
Required for Battery or UPS test (default = 12345)
Battery Self Test aborted, condition not met
Battery self-test condition is not enough. User should
check whether battery state is boost charging and
whether load level is greater than 20 percent.
Battery Refresh Charge aborted, condition not met
Boost charging condition is not enough, such as no
battery, charger has failed, etc).
103
Operator Control Panel and Display
8.4
Dynamic Energy Flow Chart and UPS Help Screen
This screen displays a mimic diagram of the UPS that includes energy flow and status of isolation and
transfer switches. Press the Help key to activate this screen. Press again to toggle between this screen
and the main screen.
Figure 70 Help screen
Help information
Select the current record window
Select the previous menu item
Q3
Q2
Q5
Q1
Press help key back to main menu
F1
8.5
F2
F3
F4
HELP
Default Screen Saver
This default screen is displayed following at least 2 minutes of operation with no new alarm. After
another delay, the backlight turns off. Press any key (F1-F4 or Help) to reactivate the screen.
Figure 71 Default screen
Liebert NX
200 kVA-3x3
2005-05-22
UNIT #1
12:30:36
NORMAL
Press any key, back to main menu
F1
F2
F3
104
F4
HELP
Options—For Assembly Inside the UPS Cabinet
9.0
OPTIONS—FOR ASSEMBLY INSIDE THE UPS CABINET
Several items of optional equipment are available for connection to the Liebert NX UPS. These are
described in this section of the manual and should be fitted prior to installation.
9.1
Protection
9.1.1
Redundant Back-Feed Protection
In addition to the dry output back-feed protection contact provided for tripping of an external circuitbreaker upon a shorted static bypass semiconductor condition (refer to 1.8.4 - Output Dry Contacts), an optional contactor can be fitted in series with bypass semiconductors (SCR) in order to provide air-gap isolation between upstream of the UPS input bypass mains and the Inverter output. The
power supply to the coil of contactor is taken from the bypass mains input line voltage. When the
bypass mains input is unavailable, the contactor is opened and the UPS is disconnected from the
bypass mains supply.
9.1.2
Seismic Anchors
Seismic anchors avoid or lessen the damage caused by a possible earthquake or vibration and ensure
that the UPS does not overturn or move laterally under such a situation.
Table 25
Seismic anchor sizing
UPS
Anchor Width
mm (in)
Anchor Length
mm (in)
30-120kVA
500 (19.7)
83 (3.3)
140-200kVA
750 (29.5)
83 (3.3)
The Seismic Anchor classification when bolted into a suitable concrete slab, exceeds the requirements
of Level 2, Table 2 IEC60068.3.3 and complies with UBC 1994, Seismic Zone 4 for strong to very
strong earthquakes
9.1.3
Degree of Protection for the UPS Enclosure
The standard degree of protection is IP20. A canopy option for IP21 is also available.
9.1.4
Battery Start Facility
The battery start kit consists of controls, a push button, a charging resistor and an internal battery
contactor that replaces any end of discharge battery circuit breaker trip control. The battery is permanently connected to the UPS DC input.
105
Options—For Assembly Inside the UPS Cabinet
1
2
3
GND IN P12
Blue
Green
Red
TMP-2
Temperature
Transport
P12 OUT
GND
Figure 72 Battery Start Option for UPS with external battery
4
3
2
Contactor
J12-33
J12-34
Auxiliary Contact
Main Contact
OT6-4 LM35
+
Batt-P
Contactor
Control Coil
+
X7
2 3
4
Monitor Board
-U2
J15-1
J15-2
Batt-P
Detection Board
-M4
X2-1
X2-2
Battery
Cabinet
X1-1
Battery Black-Start
Board
-
P
C
+
NO
Manual Press-Button
(AB6M)
Soft-Out
Black-Start Resistor
X1-2
Soft-In
Batt-N
P-Bus
N-Line
P-Bus
N-Line
N
Black-Start LED
AL6-M
Batt-N
UPS
NOTE
Battery contactor opens after Inverter shutdown at end of battery discharge. Battery Start
settings disable the end of discharge trip command to external battery circuit breaker.
9.1.5
Bypass Current Sharing Inductors
Applicable in paralleled UPS configurations to ensure that the (passive) static bypass switches, when
activated, share the load current. The inductors provide droop type current compensation for the otherwise inherent current dispersion due to SCR and cable impedance differences.
Table 26
Bypass current sharing inductors-dimensions, values
Dimensions
WxLxH, mm (in)
Inductor
Value (uH)
30/ 40 kVA
70x100x140
(2.8x3.9x5.5)
122
60/80 kVA
140x100x200
(5.5x3.9x7.9)
65
100/120kVA
210x100x250
(8.3x3.9x9.8)
40
140/160kVA
160x190x240
(6.3x7.5x9.4)
26
200kVA
160x190x240
(6.3x7.5x9.4)
22
UPS
Three bypass current sharing inductors are assembled within each UPS cabinet without requirement
of additional footprint. The resulting degree of unbalance is typically less than 20% of the rated system current depending on the external cable configuration. Cable lengths from the Bypass supply to
each UPS module and from the UPS module output to the paralleling point should be kept as identical as possible.
106
Options—For Assembly Inside the UPS Cabinet
Figure 73 Bypass current sharing inductances
UPS 1
N
N2
U3
U2
Input
Output
V3
V2
W3
W2
Q2
Bypass Current
Sharing Induct.
Static Switch
107
Q5
Options—For Assembly Inside the UPS Cabinet
9.1.6
Battery Ground Fault Detection
In addition to any residual current device mounted externally and upstream the UPS or when
optional isolation transformers are fitted to the UPS, an optional residual battery current device can
be fitted to detect leakage current from the battery into the PE (Protective Earth) Residual current
range monitored: 30~3000mA.
Power supply voltage for the set: AC230V (L-N);
When a battery ground fault is detected, an alarm will appear on the UPS display panel.
An additional Dry contact fault Alarm signal is available for remote monitoring:
Table 27
Terminal
Dry contact fault alarm signal is available for remote monitoring
Name
Definition
21
Common
Battery Ground Fault Detection – can be
programmed as Alarm or Pre-Alarm
22
NC
24
NO
The Battery ground fault detection set contains one CT (current transformer) and one DC sensitive
residual current monitor. The connection of this set for UPS is illustrated as follows.
Figure 74 Battery ground fault detection set connections
Current
Transformer
W1-A358
Battery
BCB or
Contactor
X
Batt-N
K1
Socket
Output
Phase
K2
I2
Monitor Board
-U2
I2
A1
11
4 +12V
A2
14
2
IN DRY-X3
Output
Neutral
Battery Ground
Fault Detection
Resys B470
(AC230)
BtG
The Battery Ground Fault Detection Set is assembled within the UPS cabinet.
108
UPS
Options—For Assembly Inside the UPS Cabinet
9.1.7
Replacing Dust Filters
Installing the two dust filters in the Liebert NX requires only a Phillips screwdriver. Each filter is
held in place by a bracket on either side of each filter. To install each filter:
1. Open the UPS door and locate the filters on the back side of the front door (see Figure 75).
2. Remove one bracket and loosen the screw on the second bracket. The second bracket need not be
removed (see Figure 75).
3. Remove the dust filter to be replaced.
4. Insert the clean filter.
5. Reinstall the bracket, tightening the screw securely.
6. Tighten the screw on the second bracket.
Figure 75 Replacing the dust filters
Bracket
Sems screw
9.1.8
Bracket
Redundant Fan for Power Module
In addition to the monitored fans installed in the UPS cabinet to ensure sufficient cooling power at
various operation modes with 100% rated load, a redundant power module fan set can be supplied,
thus ensuring continuity of UPS operation even with the failure of some fans. No extra footprint is
required.
109
Options—For Assembly Inside the UPS Cabinet
9.2
Communication and Monitoring
Figure 76 Communication bays and cable location
DB-9
Monitor
Board
Location
Preferred Device This Location
RS-232-1 DB-9 (COM Port 1) - Serial MultiLink Software
(Port Setting 2400 Baud)
RS-232-2 DB-9 (COM Port 2 - Service Access Software
(Port Setting 9600 Baud)
(
Location
Top Bay
Mid Bay
Bottom Bay
Preferred Device This Location
Relay Card (no port setting req’d)
Multiport4 (no port setting req’d)
OCWeb LB / OC485 (port setting
2400 Baud)
Suggested routing of customer-supplied
communication cables
=
Gland plate
for cable exit
Notes:
a) All Intellislot cards are supported in any bay.
b) Port sharing is:
- PERMITTED between RS232-x DB9 devices and Relay /
Multiport4 Intellislot cards (i.e., Serial Multilink software
will work from RS232-1 DB9 also when relay card is
inserted in the top bay.
- NOT PERMITTED between RS-232-x D-B9 devices and
OCWeb / OC485 cards (i.e., Serial MultiLink software will
not work from RS232-1 DB-9 when OCWeb card is inserted
in the top bay.
c) Monitor board firmware version will be m131 or greater.
The version may be verified from the UPS LCD (refer to
8.0 - Operator Control Panel and Display).
110
Options—For Assembly Inside the UPS Cabinet
9.2.1
OC Web Card - SNMP/HTTP Network Interface Card
This network interface card provides all real-time data and status information as SNMPv1 traps for
connection to a 10/100-baseT Ethernet network and in addition the same card will also transmit the
same status information and all measured parameters for display via a Web browser.
This card is supported in the top, middle and bottom Intellislot bays.
Figure 77 OC Web Card data summary window
Figure 78 OC Web Card battery data summary
111
Options—For Assembly Inside the UPS Cabinet
9.2.2
Relay Card
The Relay card provides voltage-free contact closures for remote monitoring of alarm conditions.
Delivering On Battery, On Bypass, Low Battery, Summary Alarm, UPS Fault and On UPS signals,
the easy-to-install card integrates with AS/400 computers (additional cable required) and other relay
contact monitoring systems.
The Relay card is rated for 24 VAC/VDC at 1A and supported in any of the three NX Intellislot bays.
Table 28
Pin
Relay Card pin configuration
Function
Operation
Closed if no UPS failure
1
UPS Fault
2-3
Not Used
4
UPS Fault
Closed if UPS fails
5
Summary Alarm**
Closed if SUMMARY ALARM** occurs
6
Summary Alarm**
Closed if no alarm conditions are present
7
Any Mode Shutdown return
Not – use External EPO terminal
8
Not Used
9
Common - Low Battery
10
Low Battery
Closed if battery is OK
11
Low Battery
Closed if LOW BATTERY point occurs.
12-13
Not Used
14
UPS Any Mode Shutdown
15
On UPS
Closed if ON UPS (inverter) power
16
On Battery
Closed if ON BATTERY power (Utility failure)
17
Common - UPS Fault, Summary Alarm,
On UPS, On Battery, On Bypass
18
On Battery
19 ÷ 23
Not support– use External EPO terminal
Closed if not ON Battery power (Utility OK)
Not Used
24
On Bypass
25
Not Used
Closed if ON BYPASS
**A Summary Alarm occurs when any of the following conditions exist:
•
•
•
•
Utility power is out of the acceptable range (voltage and/or frequency)
UPS is in BYPASS MODE (load not on Inverter power)
UPS Battery is LOW
UPS fault has occurred
Table 29:
#
Connection
Description
JP01
Pin 9 to Pin 17
Allows all relay COMMONS to be tied together.
JP02
Pin 7 to Pin 17
REMOVE - (Interconnects all relay COMMONS and the (not supported)
ANY MODE SHUTDOWN Return.
112
Options—For Assembly Inside the UPS Cabinet
9.2.3
Multiport-4 Card
The Multiport-4 card provides 4 sets of voltage-free contact closures for remote monitoring of alarm
conditions UPS operation On Battery and battery low condition. A typical application is to allows a
maximum of four computer systems to simultaneously monitor the status (e.g., utility power failure /
low battery) of a single UPS.
This card is supported in any of the three NX Intellislot bays.
Figure 79 SiteNet MultiPort4 Intellislot pin configuration
CPU
CPU
UPS
CPU
CPU
Table 30
Pin
SiteNet MultiPort4 Intellislot pin assignment
Assignment
Description
1
Low Battery
2
Not Used
3
Not Used
4
Not Used
5
Not Used
6
Not Used
7
Low Battery Common
8
Utility Fail Common
9
Utility Fail
113
Options—For Assembly Inside the UPS Cabinet
9.2.4
OC485 Web Card – Modbus, Jbus, IGM Net
The OpenComms 485 Card facilitates SiteScan Web or Building Management Systems monitoring.
The RS232 port is used for connection to a personal computer for setting up.
The RS-485 port supports IGM Net and Modbus/JBus protocols and maps the operation of the UPS
including status, alarms and data (voltages, currents, frequency, power, power factor, temperatures
etc.)
Figure 80 OC485 Web card
Table 31
NX communication options
Physical
description
of port
Top
Intellislot
Middle
Intellislot
Bottom
Intellislot
9.2.5
Labeled
ID Name
of Port
Intellislot 2
(On Monitor Board)
Intellislot 1
(On Monitor Board)
Intellislot 3
(On Monitor Board)
On the UPS
LCD screen,
under Settings,
controlled by:
Comm 1
Comm 2
Comm 3
Monitoring
Devices
supported
Baud
rate
Multiport 4
any
Relaycard-int
any
OCWEB-LB
2400
Modbus/Jbus
2400
Multiport 4
any
Relaycard-int
any
OCWEB-LB
2400
Modbus/Jbus
2400
Multiport 4
any
Relaycard-int
any
OCWEB-LB
2400
Modbus/Jbus
2400
Comments
Not simultaneous with
Multilink in RS232-1
Not simultaneous with
Multilink in RS232-2
Top
DB9 port
RS232-1
Comm 1
Multilink Serial
9600
Not simultaneous with Web
card in top Intellislot.
Bottom
DB9 port
RS232-2
Comm 2
Service
Software
(Reserved)
9600
Not simultaneous with Web
card in middle Intellislot.
Remote Alarm Monitor
Status and alarm conditions are available on an optional remote alarm monitor (RAM) panel that is
driven by volt-free alarm status contacts from an optional relay alarm board.
114
Technical Specifications
10.0 TECHNICAL SPECIFICATIONS
10.1
Conformity and Standards
The UPS has been designed to conform to the following European and international standards:
Table 32
Compliance with European, international standards
Description
Normative reference
General and safety requirements for UPS used in operator
access areas
EN 50091-1-1 /IEC 62040-1-1 / AS 62040-1-1
Electromagnetic compatibility (EMC) requirements for UPS
EN 50091-2 / IEC 62040-2 / AS 62040-2 (Class A)
Method of specifying the performance and test requirements of
UPS
EN 50091-3 / IEC 62040-3 / AS 62040-3 (VFI
SS 111)
The above mentioned product standards incorporate relevant compliance clauses with generic IEC
and EN standards for safety (IEC/EN/AS60950), electromagnetic emission and immunity (IEC/EN/
AS61000 series) and construction (IEC/EN/AS60146 series and 60529). For more details, see below:
Description
Normative reference
Safety for Information technology equipment
EN60950 / IEC 60950 / AS 60950
Degrees of protection provided by enclosures (IP code).
EN 60529/ IEC60529 / AS 60529
Semiconductor convertors. Part 1: General requirements and line
commutated convertors. Part 1-1: Specifications of basic requirements
IEC 60146-1-1 / AS 60146-1-1
Electromagnetic compatibility (EMC): immunity test
IEC / AS 61000-4-2, -3-4, -5, -6
Limits for harmonic current emission
IEC / AS 61000-3-2, -3-4, -3-6
The product standards in Table 32 incorporate relevant compliance clauses with generic IEC and EN
standards for safety (IEC/EN/AS60950), electromagnetic emission and immunity (IEC/EN/AS61000
series) and construction (IEC/EN/AS60146 series and 60529).
Table 33
Environmental characteristics
Rated Power, kVA
Acoustic noise level at 1 meter
Unit of
Measurement
30
40
60
80
100
120
140
160
200
dBA
55
55
59
59
62
62
65
65
66
m (ft)
≤1000 (3280) above sea level
derate power by 1% per 100m between 1000 and 2000 (3280-6562)
—
0 to 95% non condensing
Operating Temperature
°C (°F)
0 to 40 (32 to 104)
Note: Battery life is halved for every 10°C increase above 20°C
UPS Storage-Transport Temperature
°C (°F)
-20 to 70 (-4 to 158)
Recommended Battery Storage
Temperature
°C (°F)
-20 to 30 (-4 to 86)
(20 for optimum battery storage)
Altitude of Operation
Relative Humidity
115
Technical Specifications
Table 34
Efficiency, AC/AC
Input and output voltage 400VAC, battery charged, full rated linear load
Unit of
Measurement
30
40
60
80
100
120
140
160
200
%
89
90
91
91
90.6
91.1
92.5
92.7
92.8
ECO Mode
%
94
94.8 94.3
95
95
95.6
Inverter Efficiency (DC/AC) (battery at nominal voltage 480VDC and full-rated linear load)
Battery Mode
%
93
93
94
94
94
94
95.5
95.7
95.7
94
94
94
Rated Power, kVA
Normal Mode
(dual conversion)
Heat Losses & Air Exchange—Ventilation
Normal Mode
kW
ECO Mode
kW
No Load
kW
L/sec
M3/hr
Forced air cooling
(front intake, top exhaust)
Table 35
3.0
3.6
4.7
6.3
7.9
9.5
10.8
11.8
14.5
1.5
1.6
2.0
2.6
3.5
4.3
7.0
7.6
9.9
1.3
1.4
1.9
2.4
3.0
3.7
4.9
4.9
333
333
1200
458
458
1650
500
500
1800
671
671
2415
5.6
721
2595
Mechanical characteristics
Unit of
Measurement
Rated Power, kVA
Dimensions, H x W x D
mm (in)
Mass, without batteries
kg (lb)
Finish
Colour
IEC 60529
Protection Degree
30
40
60
80
100
120
140
160
200
1600 x 600 x 825
1800 x 700 x 825
1800 x 1000 x 825
(63 x 23.6 x 32.5)
(70.8 x 27.5 x 32.5)
(70.8 x 39.4 x 32.5)
312
341
401 445
720
720
960
960
1060
(688) (752) (884) (981) (1587)
(1587) (2116) (2116) (2337)
Pantone 877 (Silver grey)
eqvl Becker Silver epoxy polyester powder 041-37-2
IP20
(finger-proof with front doors open or closed)
Values listed are the mass of the units with options added (ground fault sensor, bypass share inductors and redundant fans).
Table 36
Rectifier AC input (mains)
Unit of
Measurement
Rated power, kVA
Rated AC Input Voltage 1
VAC
Input voltage tolerance 2
Frequency 1
Power Factor
full load
VAC
Hz
half load
kW/kVA
30
40
60
80
100
120
140
160
200
380/400/415 V
(three-phase and sharing neutral with the bypass input)
305V to 477V 304V to 208V (output de-rated from 99% to 70%)
50/60Hz (tolerance 40Hz to 72Hz)
0.99
0.99
0.99
0.99
0.99
0.99
0.99
0.99
0.99
0.98
0.98
0.98
0.98
0.98
0.98
0.98
0.98
0.98
27.2
35.9
53.3
71.0
88.8
107
122
139
174
32.9
43.0
64.6
85.2
107
128
159
182
228
39
52
77
103
128
154
177
201
252
48
62
93
123
154
185
231
264
330
3
3
3
3
3
3
3.5
3
3
Input power
rated 3
maximum 4
kVA
Input current
rated 3
maximum 4
Harmonic Current Distort (with
linear or non-linear balanced
load and at input THVD ≤ 2%)
Duration of progressive power
walk-in
1.
2.
3.
4.
A
THID
% FL
sec
10 seconds to reach full rated current
(selectable 5 through 30 seconds in 5 second intervals)
Rectifier operates at any of the rated supply voltages and frequencies without further adjustment.
At 305V input mains, the UPS maintains the specified output voltage at rated load without discharging a previously charged battery.
EN 50091-3: at rated load and input voltage 400V, battery charged
EN 50091-3: at rated load and input voltage 400V, battery charging at maximum rated power.
116
Technical Specifications
Table 37
Intermediate DC circuit, battery
Rated Power, kVA
Unit of
Measurement
30
40
60
80
100
120
140
160
200
VDC
Nominal: 480V (VRLA Float charge is 540V)
Range: 400V ~ 600V
Nominal
—
240 = [40 x 6-cell (12V) blocks]
Maximum
—
252 = [42 x 6-cell (12V) blocks]
Minimum
—
228 = [38 x 6-cell (12V) blocks]
V/cell
2.25 V/cell (selectable from 2.2 –2.3V/cell)
Constant current and constant voltage (IU) charge mode
mV/°C/cl
- 3.0 (selectable 0 to – 5.0 around 25°C [77°F] or 20°C [68°F]or inhibit)
% V float
≤1
% C10
≤5
V/cell
2.35 V/cell (selectable from 2.30-2.40V/cell)
Constant current and constant voltage (IU) charge mode
—
- float-boost current trigger 0.050 C10 (selectable 0.030-0.070)
- boost-float current trigger 0.010 C10 (selectable 0.005-0.025) with
24 hr safety time-out (selectable 8-30 hr)
- boost mode inhibit also selectable
End Of Discharge (VRLA)
V/cell
1.63 V/cell (selectable from 1.60~1.75 V/cell
Auto Inverse EOD voltage x discharge current mode
(The end of discharge voltage increases at low discharge currents).
Battery Charge
V/cell
2.4 V/cell (selectable from 2.3-2.4V/cell)
Constant current and constant voltage (IU) charge mode
Programmable auto trigger or inhibit of boost mode
Battery bus voltage
Quantity of lead-acid cells
Float Voltage (VRLA)
Temperature
compensation
Ripple Voltage
Ripple Current
1
Boost Voltage (VRLA)
Boost Control
Battery Charging Power 2
Max Current
(Adjustable) 3
kW
5.1
6.7
10
13
17
20
23.8
27.2
34
A
13
17
25
33
43
50
60
68
85
1. For a battery capacity of 24Ah or that corresponding to a rated back-up time of 10 minutes, whichever is greatest.
2. At low input voltage the UPS recharge capability increases with load decrease (up to the maximum capacity indicated).
3. Maximum currents listed are for end of discharge voltage of 1.67 V/cell for 240 cells.
117
Technical Specifications
Table 38
Inverter output to critical load
Rated Power
(load pf 0.8 lag)
kVA
30
40
60
80
100
120
140
160
200
(load pf unity)
kW
24
32
48
64
80
96
112
128
160
(load pf 0.9 lead)
kVA
24
32
48
64
80
96
112
128
160
Rated AC Voltage 1
Frequency 2
Overload
Fault Current
Non linear load capability
4
Neutral current capability
V (ac)
380/400/415 V
(three-phase, four-wire with neutral referenced to the bypass neutral)
Hz
50 / 60
% rated
110% for 60 min
125% for 10 min
150% for 1 min
225% for 200 msec
% rated
320% current limitation for 200 msec
% rated
100%
% rated
170%
152%
135%
Steady state voltage stability 5
%
± 1 (balanced load),
± 2 (100% unbalanced load),
Transient voltage response 6
%
±5
Total Harmonic Voltage Distortion
(THDV) 4
%
< 1 (linear load)
<3.5 (non linear load, 380V)
<4.0 (non linear load, 400V
< 4.5 (non linear load, 415V)
Hz
Rated frequency ± 2 Hz (selectable ± 0.5 to ± 3Hz)
Hz/sec
1 Hz/sec
selectable 0.1 to 3Hz/s (single UPS), 0.2Hz/sec (paralleled.UPS)
%V
(AC)
±5
Synchronisation - Window
- Slew Rate (Max change rate of
synch frequency)
Inverter Voltage Tolerance
1.
2.
3.
4.
5.
6.
Factory set to 400V – 380 or 415V selectable by commissioning engineer.
Factory set to 50Hz; 60 Hz selectable by commissioning engineer. Frequency converter operation also selectable.
EN 50091-3 (1.4.50).
Crest factor > 3:1 limited by IEC 62040-3 definition of non linear load.
EN 50091-3 (4.3.4).
EN 50091-3 (4.3.7) also for 0-100-0% load transient. Transient recovery time: return to within 5% of steady state output voltage within
half a cycle.
118
Technical Specifications
Table 39
Bypass input
Rated Power, kVA
Unit of
Measurement
Rated AC Voltage 1
V (ac)
30
40
60
80
100
120
140
160
200
380/400/415 V
three-phase four-wire, sharing neutral with the rectifier input and
providing neutral reference to the output
Rated current
380V
45
61
91
121
151
182
212
242
303
400V
43
58
87
116
145
174
202
230
288
415V
42
56
83
111
139
167
194
222
278
Overload capacity
A
135% long term
170% 10 min
1000% 100 ms
%
125% long term
150% 10 min
1000% 100 ms
Thermomagnetic circuit-breaker, rated up to 125% of nominal output
current. IEC 60947-2 curve C.
Upstream protection, bypass
line (by others)
Current rating of neutral cable
A
Frequency 2
Hz
50 / 60
ms
Synchronous transfer: ≤ 1ms
Asynchronous transfer (default): 15 ms (50 Hz), 13.3 ms (60 Hz)
or 40, 60, 80, 100 ms selectable
% V (ac)
Upper limit: +10, +15 or +20, default +15
Lower limit –10, -20, -30 or -40, default: -20
(delay time to accept steady bypass voltage: 10 sec)
Bypass frequency tolerance
%
± 2.5, ±5, ±10 or ±20 default ±10
Synchronisation - Window
Hz
Rated frequency ±2 Hz (selectable ± 0.5 to ± 3Hz)
Transfer time (between
Bypass and Inverter)
Bypass voltage tolerance
1.7 In
1.52In
1.35In
1. Factory set to 400V – 380 or 415V selectable by commissioning engineer.
2. Factory set to 50Hz; 60 Hz selectable by commissioning engineer. Bypass condition ignored when UPS set as frequency converter.
119
Ensuring The High Availability
0f Mission-Critical Data And Applications.
Emerson Network Power, the global leader in enabling business-critical
continuity, ensures network resiliency and adaptability through
a family of technologies—including Liebert power and cooling
technologies—that protect and support business-critical systems.
Liebert solutions employ an adaptive architecture that responds
to changes in criticality, density and capacity. Enterprises benefit
from greater IT system availability, operational flexibility and
reduced capital equipment and operating costs.
Technical Support / Service
Web Site
www.liebert.com
Monitoring
800-222-5877
monitoring@liebert.com
Outside the US: 614-841-6755
Single-Phase UPS
800-222-5877
upstech@liebert.com
Outside the US: 614-841-6755
Three-Phase UPS
800-543-2378
powertech@liebert.com
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800-543-2778
Outside the United States
614-888-0246
Locations
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and completeness of this literature, Liebert Corporation assumes no
responsibility and disclaims all liability for damages resulting from use of
this information or for any errors or omissions.
© 2006 Liebert Corporation
All rights reserved throughout the world. Specifications subject to change
without notice.
® Liebert and the Liebert logo are registered trademarks of Liebert
Corporation. All names referred to are trademarks
or registered trademarks of their respective owners.
SL-25230 (07/06) Rev. 5
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