Liebert® NXL™ UPS
Installation Manual – 250-400kVA, 60Hz, Three-Phase, Single-Module and Multi-Module Units
CONTACTING EMERSON NETWORK POWER® FOR SUPPORT
To contact Emerson Network Power Liebert® Services for information or repair service in the United
States, call 1-800-LIEBERT (1-800-543-2378). Liebert Services offers a complete range of start-up
services, repair services, preventive maintenance plans and service contracts.
For repair or maintenance service outside the 48 contiguous United States, contact Liebert Services,
if available in your area. For areas not covered by Emerson Network Power Liebert Services, the
authorized distributor is responsible for providing qualified, factory-authorized service.
For LGS to assist you promptly, please have the following information available:
Part numbers: _________________________________________________________________
Serial numbers:________________________________________________________________
Rating: _______________________________________________________________________
Date purchased: _______________________________________________________________
Date installed:_________________________________________________________________
Location: ______________________________________________________________________
Input voltage/frequency: ________________________________________________________
Output voltage/frequency: ______________________________________________________
Battery reserve time:___________________________________________________________
Product Warranty Registration
To register for warranty protection, visit the Service and Support section of our Web site at:
www.liebert.com
Click on Product Registration and fill out the form.
TABLE OF CONTENTS
CONTACTING EMERSON NETWORK POWER® FOR SUPPORT . . . . . . . . . . . . . . INSIDE FRONT COVER
IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.0
SINGLE-MODULE AND MULTI-MODULE MECHANICAL INSTALLATION . . . . . . . . . . . . . . . . . . .3
1.1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2
Preliminary Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3
Environmental Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3.1
1.3.2
1.4
UPS Room . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4.1
1.4.2
1.4.3
1.4.4
1.4.5
Moving the Cabinets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clearances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Raised Floor Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Kick Plate Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Considerations for 1+N Parallel Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
5
5
5
5
1.5
System Composition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.6
Cable Entry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.0
UPS ELECTRICAL INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
2.1
External Protective Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2
Power Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2.1
2.2.2
2.3
Sizing the Input Breaker Feeding a Liebert NXL UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Power Cable Connection Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Control Cable and Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.3.1
2.3.2
Dry Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Multi-Module Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.4
Digital LBS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.5
Configuring Neutral and Ground Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.5.1
2.5.2
2.5.3
2.5.4
2.5.5
Four-Wire Input connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Three-Wire Input Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preferred Grounding Configuration, Battery Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Multi-Module Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High Resistance Ground Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16
16
16
17
17
2.6
Grounding Diagrams, Single- and Multi-Module Systems . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.0
OPTIONAL EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.1
Single-Module System Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.1.1
3.1.2
3.1.3
3.1.4
3.2
Matching Maintenance Bypass Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Load Bus Synch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Alarm Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20
20
20
20
Communication and Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.2.1
3.2.2
3.2.3
Alber Monitoring System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Programmable Relay Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Input Contact Isolator Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
i
4.0
5.0
INSTALLATION DRAWINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
FIGURES
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
Cabinet arrangement—Liebert NXL single-module, battery cabinets, maintenance bypass
cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Cabinet arrangement—Liebert NXL 400kVA, 575-600V multi-module and battery cabinets . . . 7
Cabinet grounding plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Kick plate and filter locations, typical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
External Interface Board connections layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Inter-Module Communication Board wiring diagram—Multi-modules . . . . . . . . . . . . . . . . . . . . 15
Inter-Module Communication Board wiring diagram—Digital LBS . . . . . . . . . . . . . . . . . . . . . . . 15
Grounding diagram, three-wire single-module system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Grounding diagram, four-wire single-module system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Grounding diagram, three-wire multi-module system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Grounding diagram, four-wire multi-module system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Control wiring, Programmable Relay Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Programmable relay board dialog box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Input contact isolator dialog box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Optional Input Contact Isolator Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Outline drawing, 250kVA, 480V Liebert NXL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Outline drawing, 250kVA, 575/600V; and 300kVA, 480/575/600V Liebert NXL . . . . . . . . . . . . . 26
Outline drawing, 400kVA, 480V Liebert NXL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Outline drawing, 400kVA, 575V/600V Liebert NXL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Outline drawing, 400kVA, 575V/600V Liebert NXL with DC I/O cabinet . . . . . . . . . . . . . . . . . . 29
Main components, 250kVA, 480V Liebert NXL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Main components, 250kVA, 575/600V, and 300kVA, 480/575/600V Liebert NXL . . . . . . . . . . . . 31
Main components, 400kVA, 480V Liebert NXL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Main components, 400kVA, 575V/600V Liebert NXL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Main components, 400kVA, 575V/600V Liebert NXL with DC I/O cabinet . . . . . . . . . . . . . . . . . 34
Input/output conduit detail drawing, 250-300kVA, all voltages, Liebert NXL . . . . . . . . . . . . . . . 35
Input/output terminal detail, 400kVA, 480V Liebert NXL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Input/output terminal detail, 400kVA, 575V/600V Liebert NXL. . . . . . . . . . . . . . . . . . . . . . . . . . 37
Input/output terminal detail, 400kVA, 575V/600V Liebert NXL with DC I/O cabinet . . . . . . . . 38
Top cable entry routing and installation order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Bottom cable entry routing and installation order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Single-input busbar arrangement—250-400kVA units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Low-voltage cable entry—250-400kVA units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Inverter overload data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Bypass overload data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
ii
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
UPS input dry contacts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UPS control with battery cabinet or module battery disconnect . . . . . . . . . . . . . . . . . . . . . . . . . .
UPS control contacts with global maintenance bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UPS control contacts to remote status panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parallel from UPS module Inter-Module Communication Board to other Inter-Module
Communication Board in system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wire size, length for digital LBS connection of UPS Inter-Module Communication
Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Programmable Relay Board pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Contact Isolator Board pre-assigned values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Contact Isolator Board control wiring connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Liebert NXL UPS specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current ratings—rectifier input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current ratings—bypass input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current ratings—output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current ratings—battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended conduit and cable sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended lug sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended torque values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iii
13
13
13
14
14
15
21
24
24
42
44
44
44
44
45
49
49
iv
Important Safety Instructions
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important instructions that should be followed during installation of your
Liebert NXL UPS.Read this manual thoroughly, paying special attention to the sections that apply to
your installation, before working with the UPS. Retain this manual for use by installing
personnel.
! WARNING
Risk of electrical shock. Can cause personal injury or death.
This UPS has several circuits that are energized with high DC as well as AC voltages. Check
for voltage with both AC and DC voltmeters before working within the UPS. Check for voltage
with both AC and DC voltmeters before making contact.
Only properly trained and qualified personnel wearing appropriate safety headgear, gloves,
shoes and glasses should be involved in installing the UPS or preparing the UPS for
installation. When performing maintenance with any part of the equipment under power,
service personnel and test equipment should be standing on rubber mats.
In case of fire involving electrical equipment, use only carbon dioxide fire extinguishers or
those approved for use in fighting electrical fires.
Extreme caution is required when performing installation and maintenance.
Special safety precautions are required for procedures involving handling, installation and
maintenance of the UPS system. Observe all safety precautions in this manual before
handling or installing the UPS system. Observe all precautions in the Operation and
Maintenance Manual, SL-25425, before as well as during performance of all maintenance
procedures. Observe all DC safety precautions before working on or near the DC system.
! WARNING
Risk of heavy unit falling over. Improper handling can cause equipment damage, injury or
death.
Exercise extreme care when handling UPS cabinets to avoid equipment damage or injury to
personnel. The UPS module weight ranges from 3965 to 6380 lb. (1768 to 2894kg).
Locate center of gravity symbols
and determine unit weight before handling each
cabinet. Test lift and balance the cabinets before transporting. Maintain minimum tilt from
vertical at all times.
Slots at the base of the modules cabinets are intended for forklift use. Base slots will support
the unit only if the forks are completely beneath the unit.
Read all of the following instructions before attempting to move, lift, remove packaging from
or preparing unit for installation.
! WARNING
Risk of electrical shock and fire. Can cause equipment damage, personal injury or death.
Under typical operation and with all UPS doors closed, only normal safety precautions are
necessary. The area around the UPS system should be kept free of puddles of water, excess
moisture and debris.
Only test equipment designed for troubleshooting should be used. This is particularly true for
oscilloscopes. Always check with an AC and DC voltmeter to ensure safety before making
contact or using tools. Even when the power is turned Off, dangerously high potential electric
charges may exist at the capacitor banks and at the DC connections.
All wiring must be installed by a properly trained and qualified electrician. All power and
control wiring must comply with all applicable national, state and local codes.
One person should never work alone, even if all power is disconnected from the equipment. A
second person should be standing by to assist and to summon help in case of an accident.
1
Liebert® NXL™
Important Safety Instructions
NOTE
Materials sold hereunder cannot be used in the patient vicinity (e.g., use where UL, cUL or
IEC 60601-1 is required). Medical applications such as invasive procedures and electrical life
support equipment are subject to additional terms and conditions.
NOTICE
This unit complies with the limits for a Class A digital device, pursuant to Part 15 Subpart J
of the FCC rules. These limits provide reasonable protection against harmful interference in a
commercial environment. This unit generates, uses and radiates radio frequency energy and,
if not installed and used in accordance with this instruction manual, may cause harmful
interference to radio communication. Operation of this unit in a residential area may cause
harmful interference that the user must correct at his own expense.
Liebert® NXL™
2
Single-Module and Multi-Module Mechanical Installation
1.0
SINGLE-MODULE AND MULTI-MODULE MECHANICAL 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 NXL uninterruptible power supply and related equipment.
This chapter is a guide to general procedures and practices that should be observed by the installing
personnel. The particular conditions of each site will determine the applicability of such procedures.
! WARNING
Risk of electrical shock. Can cause injury or death.
Special care must 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.
NOTICE
All equipment not referred to in this manual is shipped with details of its own mechanical and
electrical installation.
NOTICE
Three-phase input supply required.
The standard Liebert NXL UPS is suitable for connection to three-phase, four-wire (+ Earth)
TN-C, TN-S, IT-G, IT-IG or, three-phase, three-wire plus ground, IT-UG.
If using with IT Power system, a 4-pole disconnect device must be included as part of building
installation.
NOTICE
Do not apply electrical power to the UPS equipment before the arrival of the commissioning
engineer.
1.2
Preliminary Checks
Before installing the UPS, please carry out the following preliminary checks:
• Visually examine the UPS equipment for transit damage, both internally and externally. Report
any damage to the shipper immediately.
• 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.
• Verify that the UPS room satisfies the environmental conditions stipulated in the equipment
specification, paying particular attention to the ambient temperature and air exchange system.
3
Liebert® NXL™
Single-Module and Multi-Module Mechanical Installation
1.3
Environmental Considerations
1.3.1
UPS Room
The UPS module is intended for indoor installation and should be located in a cool, dry, clean-air
environment with adequate ventilation to keep the ambient temperature within the specified
operating range (see Environmental Parameters in Table 10).
The Liebert NXL UPS is cooled with the aid of internal fans. To permit air to enter and exit and
prevent overheating or malfunctioning, do not cover the ventilation openings.
NOTE
To ensure proper airflow, the unit must be installed only on a solid surface made of a
noncombustible material, such as concrete.
The Liebert NXL UPS is equipped with air filters located behind the front doors. A schedule for
inspection of the air filters is required. The period between inspections will depend upon
environmental conditions.
When bottom entry is used, the conduit plate must be installed.
NOTE
The UPS is suitable for mounting on concrete or other non-combustible surface only.
1.3.2
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 Environmental Parameters in Table 10).
1.4
Positioning
The cabinet is structurally designed to handle lifting from the base.
Access to the power terminals, auxiliary terminals blocks and power switches is from the front.
The door can be opened to give access to the power connections bars, auxiliary terminal blocks and
power isolators. Front door can be opened at 180° for more flexibility in installations.
NOTE
The UPS must be placed a solid surface. There must be no openings in the surface except those
required for conduit landing areas. All provided kick plates must be installed.
1.4.1
Moving the Cabinets
The route to be travelled between the point of arrival and the unit’s position must be planned to make
sure that all passages are wide enough for the unit and that floors are capable of supporting its
weight (for instance, check that doorways, lifts, ramps, etc. are adequate and that there are no
impassable corners or changes in the level of corridors).
Ensure that the UPS weight is within the designated surface weight loading (kg/cm2) of any handling
equipment. For weight details, see Table 10.
The UPS can be handled with a forklift or similar equipment. Ensure any lifting equipment used in
moving the UPS cabinet has sufficient lifting capacity. When moving the unit by forklift, care must be
taken to protect the panels. Do not exceed a 15-degree tilt with the forklift. Bottom structure will
support the unit only if the forks are completely beneath the unit.
Handling with straps is not authorized.
Liebert® NXL™
4
Single-Module and Multi-Module Mechanical Installation
! WARNING
Risk of heavy unit falling over. Improper handling can cause equipment damage, injury or
death.
Because the weight distribution in the cabinet is uneven, use extreme care while handling
and transporting. Take extreme care when handling UPS cabinets to avoid equipment
damage or injury to personnel.
The UPS module weight ranges from 3965 to 6380 lb. (1768 to 2894kg).
Locate center of gravity symbols
and determine unit weight before handling each
cabinet. Test lift and balance the cabinets before transporting. Maintain minimum tilt from
vertical at all times.
1.4.2
Clearances
The Liebert NXL has no ventilation grilles at either side or at the rear of the UPS. Clearance around
the front of the equipment should be sufficient to enable free passage of personnel with the doors fully
opened. It is important to leave a distance of 24" (610mm) between the top of the UPS and any
overhead obstacles to permit adequate circulation of air coming out of the unit.
1.4.3
Raised Floor Installations
If the equipment is to be located on a raised floor it should be mounted on a pedestal suitably designed
to accept the equipment point loading. Refer to the base view to design this pedestal. The top of
pedestal must be solid.
NOTE
The UPS must be placed on a solid surface. There must be no openings in the surface except
those required for conduit landing areas. All provided kick plates must be installed.
1.4.4
Kick Plate Installation
Kick plates must be installed. If the unit is to be installed in a position that does not permit access to
the rear kick plates, then kick plates must be installed before the unit is placed in its final position.
1.4.5
Special Considerations for 1+N Parallel Systems
Consider the grounding configuration of your system before finalizing module placement See 2.5 Configuring Neutral and Ground Connections.
Emerson Network Power recommends matching the impedance in the bypass path of paralleled
systems as closely as possible.
The impedance mismatch can be minimized by controlling the wiring length of each unit. The design
and the layout of the UPS system and associated panels and cabling should be examined closely to
ensure that cable lengths and impedances are closely matched. The Liebert 1+N UPS module is
supplied with a sharing reactor to minimize the impact of cable impedance mismatch.
The cabling impedance must be carefully controlled to ensure good bypass current sharing.
For Liebert NXL Systems, the cabling impedances must be within 10% from maximum to minimum.
If the cabling impedances need to be greater than 10%, contact your Emerson representative to
calculate whether the system will result in an overload condition when operating on bypass.
When bringing the 1+N system online for the first time or after removing one unit, Emerson
recommends checking the bypass current mismatch. To check the bypass current mismatch:
1. Place a load on the bypass of each UPS module.
2. View the output current of each unit.
The accuracy of the currents displayed on the UPS module is sufficient for this check. If the
mismatch is greater than 10%, the bypass impedances must be balanced or the load must be
limited to less than the maximum rating.
5
Liebert® NXL™
Single-Module and Multi-Module Mechanical Installation
1.5
System Composition
A UPS system can comprise a number of equipment cabinets, depending on the individual system
design requirements, e.g. UPS cabinet, battery cabinet, maintenance bypass cabinet. In general, all
the cabinets used in a particular installation are of the same height. Refer to the drawings provided in
4.0 - Installation Drawings for the positioning of the cabinets as shown in Figures 1 and 2.
1.6
Cable Entry
Cables can enter the UPS cabinet from bottom or top into the Input/Output (I/O) section of the unit,
see the figures in 4.0 - Installation Drawings.
Figure 1
Cabinet arrangement—Liebert NXL single-module, battery cabinets, maintenance bypass
cabinet
Applicable to:
250 - 400 kVA 480V, 250 - 300 kVA
575/600V except without
Maintenance Bypass Cabinet
The side panels and
hangers must be removed
before the cabinets can
be bolted together.
Additional
Battery
Cabinet(s)
Additional
Battery
Cabinet(s)
Liebert® NXL™
Battery
Cabinet
Liebert
NXL
UPS
Liebert
NXL
UPS
Maintenance
Bypass
Cabinet
Battery
Cabinet
Liebert
NXL
UPS
Liebert
NXL
UPS
Liebert
NXL
UPS
6
Note: If a maintenance bypass
cabinet is used, it must be
installed on the right side of
the Liebert NXL UPS
Maintenance
Bypass
Cabinet
Battery
Cabinet
Additional
Battery
Cabinet(s)
Single-Module and Multi-Module Mechanical Installation
Figure 2
Cabinet arrangement—Liebert NXL 400kVA, 575-600V multi-module and battery cabinets
The side panels and hangers must
be removed before the cabinets can
be bolted together.
Liebert
NXL
UPS
DC I/O
Section
I/O
Bypass
Section
Battery
Cabinet
Battery
Cabinet
Liebert
NXL
UPS
7
Liebert® NXL™
UPS Electrical Installation
2.0
UPS ELECTRICAL INSTALLATION
This chapter provides guidelines for qualified installers who must have knowledge of local wiring
practices pertaining to the equipment to be installed.
! WARNING
Risk of electrical shock. Can cause injury or death.
The UPS contains high DC as well as AC voltages. Check for voltage with both AC and DC
voltmeters before working within the UPS.
Only properly trained and qualified personnel wearing appropriate safety headgear, gloves,
shoes and glasses should be involved in installing the UPS or preparing the UPS for
installation.
2.1
External Protective Devices
For safety, it is necessary to install circuit breakers in the input AC supply and external battery
system. Given that every installation has its own characteristics, this section provides guidelines for
qualified installation personnel with knowledge of operating practices, regulatory standards and the
equipment to be installed.
External overcurrent protection must be provided. See Table 10 - Liebert NXL UPS specifications
for overload capacity.
Dual Input
When wiring the UPS with a separate rectifier and bypass input, each input must be protected
separately. Size the breakers according to the input currents shown in Table 10.
Liebert® NXL™
8
UPS Electrical Installation
2.2
Power Cables
The UPS requires both power and control cabling. All control cables, whether shielded or not, should
be run separate from the power cables in metal conduits or metal ducts which are electrically bonded
to the metalwork of the cabinets to which they are connected
The cable design must comply with the voltages and currents in Table 10, follow local wiring
practices and take into consideration the environmental conditions (temperature and physical
support media), room temperature and conditions of installation of the cable and system’s overload
capacity (see 5.0 - Specifications).
For cable entry terminal, refer to Figures 26 28 and 29.
! WARNING
Risk of electrical shock. Can cause injury or death.
Before cabling 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 power distribution panel.
Check that these supplies are electrically isolated, and post any necessary warning signs to
prevent their inadvertent operation.
NOTICE
For dual input operation ensure that any busbars between the bypass and the rectifier input
are removed.
When sizing battery cables, a maximum volt drop of 2VDC is permissible at the current ratings given
in Table 14.
The following are guidelines only and superseded by local regulations and codes of practice where
applicable:
• Take special care when determining the size of the neutral cable (grounded conductor), because
current circulating on the neutral cable may be greater than nominal current in the case of nonlinear loads. Refer to the values in Table 10.
• The grounding conductor should be sized according to the fault rating, cable lengths, type of
protection, etc. The grounding cable connecting the UPS to the main ground system must follow
the most direct route possible.
• Consideration should be given to the use of paralleled smaller cables for heavy currents, as this
can ease installation considerably.
• AC and DC cables must be run in conduits according to local codes, national codes and standard
best practices. This will prevent creation of excess EMI fields.
2.2.1
Sizing the Input Breaker Feeding a Liebert NXL UPS
The rectifier nominal input current value (Table 11) is based on providing enough power to operate
the inverter at full rated load when the input voltage is nominal. The published rectifier maximum
input current value is based on the maximum input current limit setting of 125%.
The recommended input breaker ampacity is based on the NEC calculation for a branch circuit with
the current limit set at the maximum value. The calculation for an 80% rated breaker is 125% of the
nominal current (continuous) plus 100% of the difference between the nominal and the maximum
currents (non-continuous). The calculation for a 100% rated breaker is 100% of the nominal current
(continuous) plus 100% of the difference between the nominal and maximum currents
(noncontinuous).
The rectifier input current limit can be adjusted from 25% to 125% of the nominal value. This setting
is accessible only to a factory-trained service engineer. The effect of changing this setting is similar to
that of changing the setting of the trip unit on a solid-state circuit breaker. With a lower current limit
setting, the calculation for the branch circuit will result in a lower value.
The input current limit should not be set less than 105% of the current needed to support the inverter
at full load for normal operation. This results in sufficient power to recharge the battery in a
reasonable time and to operate over the published input voltage range.
9
Liebert® NXL™
UPS Electrical Installation
2.2.2
Power Cable Connection Procedure
The rectifier input, bypass, output and battery power cables (all require lug type terminations) are
connected to busbars situated in the I/O section as shown in Figures 26 through 31.
Equipment Ground
The equipment ground busbar is located in the I/O section as shown in Figures 26 through 31. The
grounding conductor must be connected to the ground busbar and bonded to each cabinet in the
system.
All cabinets and cabling should be grounded in accordance with local regulations.
NOTE
Proper grounding reduces problems in systems caused by electromagnetic interference.
! WARNING
Failure to follow adequate grounding procedures can result in electric shock hazard to
personnel, or the risk of fire, should a ground fault occur.
All operations described in this section must be performed by properly trained and qualified
electricians or technical personnel. If any difficulties are encountered, contact Emerson®
Network Power Liebert Services. See the back page of this manual for contact information.
The grounding and neutral bonding arrangement must be in accordance with local and
national codes of practice.
Once the equipment has been positioned and secured, connect the power cables as described below
(refer to the appropriate cable connection drawing in 4.0 - 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 exterior and interior panels on the front of the I/O.
3. Connect the ground and any necessary main bonding jumper to the equipment ground busbar
located in the I/O section.
4. Make power connections and tighten the connections to the proper torque according to one of the
two procedures below, depending on the type of installation:
Ensure correct phase rotation.
• Top Cable Entry (see Figures 19, 20, 25, 28, 29 and 30)
• Bottom Cable Entry (see Figures 19, 20, 25, 28, 29 and 31)
Top Cable Entry
When making the power connections for top cable entry, the recommended order of pulling
and installing cables is to start from the top connections to the bottom connections. The cables
must be routed around the fault braces (see Detail in Figure 30). This is to prevent the cables
from contacting other busbars. The recommended conduit layout is shown in Figure 26.
Bottom Cable Entry
When making the power connections for bottom cable entry, the recommended order of pulling
and installing cables is to start from the bottom connections to the top connections. The cables
must be routed around the fault braces (see Detail in Figure 31). This is to prevent the cables
from contacting other busbars. The recommended conduit layout is shown in Figure 26.
NOTE
For a single input configuration, linking busbars must be installed between the bypass and the
rectifier input.
! WARNING
Risk of electrical shock. Can cause injury or death.
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 termination.
Liebert® NXL™
10
UPS Electrical Installation
! WARNING
Risk of electrical shock. Can cause injury or death.
When connecting the cables between the battery extremities to the circuit breaker always
connect the circuit breaker end of the cable first.
5. For control connection details, see 2.3 - Control Cable and Communication.
NOTE
If fault bracing brackets were removed during installation, they MUST be replaced.
6. Close and secure the interior and exterior doors.
Figure 3
Cabinet grounding plates
Note location
of larger cutouts.
Orient ground plate
as shown.
A
Detail A
Grounding plates are installed
at each shipping split.
Figure 4
Mounting
Hardware
(Supplied)
Kick plate and filter locations, typical
KICKPLATE
G
KICKPLATE
REAR
D
FRONT
KICKPLATE
KICKPLATE
DETAIL D
INSTALL M6X25 BOLT,
LCKW AND WSHR
(4) PLACES, FRONT SIDE
E
DETAIL E
F
INSTALL M6X25 BOLT,
LCKW AND WSHR
(2) PLACES, EACH SIDE
DETAIL G
INSTALL M6X60 BOLT,
LCKW AND WSHR
(2) PLACES, FRONT SIDE
INSTALL M6X25 BOLT,
LCKW AND WSHR
(4) PLACES, REAR SIDE
NOTE
Kick plates must be installed. If the unit is to be installed in a position that does not permit
access to rear kick plates, then kick plates must be installed before the unit is placed in its final
position.
11
Liebert® NXL™
UPS Electrical Installation
2.3
Control Cable and Communication
Based on your site’s specific needs, the UPS may require auxiliary connections to manage the battery
system (external battery circuit breaker), communicate with a personal computer or provide alarm
signaling to external devices, or for Remote Emergency Power Off (REPO). The External Interface
Board, arranged for this purpose, is next to the option box in the Rectifier section (refer to 4.0 Installation Drawings). The contacts are rated for 250VAC @ 2A.
Figure 5
External Interface Board connections layout
MAINT BYP
ENABLE
TB0821
ACT FILT
TB035
CNTL
P0831
P66C
P99C
AUX SPARE
TEMP
P0832
P0801
BATT GND
FLT
TB0815
EXTERNA L
CAN
MOB
TB0811
MIB
TB0830
ACT FILT
STATUS
TB0810
TB0816
RIB
ON GEN
P0808
TB0823
TB0829
EPO
STATUS
OPT
PS
TB1154B
EXTERNA L
CAN
INT BATT
CAN
TB0813
TB0819
MBB
BYP CNTL
TB0817
BIB
RECT
CNTL
J5
TB0820
TB0818
REPO
FORM C
KEY
STATUS
INV
CNTRLN
REPO
J4
BATT MTR TB1156
OP
TB0826
TB0824
Liebert® NXL™
EXT BATT
CAN
TB0812
TB0825
LBS VO LTAGE
TB1154A
12
UPS Electrical Installation
2.3.1
Dry Contacts
NOTE
If connection to more than one module is required, use a separate contact for each module.
Table 1
UPS input dry contacts
Terminal
Block
Item
Remote EPO
Input Form C
On Generator
Input Form C
Table 2
TB0816
1
REPO Switch, normally open contact
2
REPO Switch, common contact
3
REPO Switch, normally closed contact, set jumper
J5: 1-2 to enable, 2-3 to disable
1
On Generator switch, closed = On Generator
2
On Generator switch, common
3
On Generator switch, closed = Not On Generator
Wire Size/
Max Length
14AWG/
500ft.
(150m).
UPS control with battery cabinet or module battery disconnect
Terminal
Block
Item
CAN Bus and
24V Power
Supply
Table 3
TB0824
Connects to
(Description of External Item)
Pin
TB1154A
Connects to
(Description of External Item)
Pin
1
Battery Interface Board TB1154-1
2
Battery Interface Board TB1154-2
3
Battery Interface Board TB1154-3
4
Battery Interface Board TB1154-4
Wire Size/
Max Length
18 AWG
1000ft.
(300m).
UPS control contacts with global maintenance bypass
Terminal
Block
Item
Maintenance
Isolation Breaker
(MIB) Form C 1
TB0811
Maintenance Bypass
Breaker (MBB) Form C 1
Maintenance Bypass
Enable Form C 1
Remote EPO Input 1
Key Status Input
1, 3
Module Output Breaker
(MOB) Form C 2
TB0813
TB0821
TB0825
TB0820
TB0815
Connects to
(Description of External Item)
Pin
1
CB aux. contact, closed = CB is closed
2
CB aux. contact, common
3
CB aux. contact, closed = CB is open
1
CB aux. contact, closed = CB is closed
2
CB aux. contact, common
3
CB aux. contact, closed = CB is open
1
Maintenance Bypass Cabinet,
closed = load not on inverter
2
Maintenance Bypass Cabinet, common
3
Maintenance Bypass Cabinet,
closed = load on inverter
1
REPO Switch, normally open contact
2
REPO Switch, common contact
1
Key status switch, closed = key removed
2
Key status switch, common
3
Key status switch, closed = key inserted
1
CB aux. contact, closed = CB is closed
2
CB aux. contact, common
3
CB aux. contact, closed = CB is open
Wire Size/
Max Length
14AWG/500ft.
(150m)
14AWG/500ft.
(150m)
14AWG/500ft.
(150m)
14AWG/500ft.
(150m)
14AWG/500ft.
(150m)
14AWG/500ft.
(150m)
1. For 1+N systems with a maintenance Bypass, these Aux contacts must be run to each module from an isolated source.
2. For 1+N systems, these breaker Aux contact go to the UPS that it is associated with.
3. Key Status Input can be either Form-C, N.O. or N.C. contact.
13
Liebert® NXL™
UPS Electrical Installation
Table 4
UPS control contacts to remote status panel
Terminal
Block
Item
CAN Bus and 24V
Power Supply
2.3.2
TB0829
Pin
Connects to
(Description of External Item)
1
Remote Status Panel TB-2
2
Remote Status Panel TB-1
3
Remote Status Panel TB-3
4
Remote Status Panel TB-4
Wire Size/
Max Length
18 AWG/1000ft.
(300m)
Multi-Module Communication
Paralleling cables that connect the module to the system are connected to terminals P3101 and P3103
on the Inter-Module Communication (IMC) board (refer to 4.0 - Installation Drawings).
Table 5
Parallel from UPS module Inter-Module Communication Board to other Inter-Module
Communication Board in system
Terminal Designation
From
To
Signal Name
Wire Size/
Max Length
Primary Connections
P3101-1
P3101-1
Share CAN +24V
P3101-2
P3101-2
Share CAN common
P3101-3
P3101-3
System CAN +24V
P3101-4
P3101-4
System CAN common
P3101-5
P3101-5
SER synch CAN+24V
P3101-6
P3101-6
SER synch CAN common
P3101-7
P3101-7
Ground - Drain Wire
P3101-14
P3101-14
Ground
P3101-8
P3101-8
PWM synch CAN +24V
P3101-9
P3101-9
PWM synch CAN common
P3101-10
P3101-10
MMS synch CAN +24V
P3101-11
P3101-11
MMS synch CAN common
1000ft.
(300m)
Redundant Connections
P3103-1
P3103-1
Redundant share CAN +24V
P3103-2
P3103-2
Redundant share CAN common
P3103-3
P3103-3
Redundant system CAN +24V
P3103-4
P3103-4
Redundant system CAN common
P3103-5
P3103-5
Redundant SER synch CAN +24V
P3103-6
P3103-6
Redundant SER synch CAN common
P3103-7
P3103-7
Ground - Drain Wire
P3103-14
P3103-14
Ground
P3103-8
P3103-8
Redundant PWM synch CAN +24V
P3103-9
P3103-9
Redundant PWM synch CAN common
P3103-10
P3103-10
Redundant MMS synch CAN +24V
P3103-11
P3103-11
Redundant MMS synch CAN common
1.
2.
3.
4.
5.
1000ft.
(300m)
Belden 810x or Belden 89901 cables are the only approved cables.
Belden 89901 cable can be used for underground installations.
If using multiple parallel cables for each run, all cables must be run in the same conduit.
Each cable group should be run in a separate grounded conduit to ensure redundancy.
The maximum lengths must include all the parallel cables from the first module to the last module. The primary and redundant
cable lengths can be counted separately.
6. The ground pins on the Inter-Module Communication Board (Pins 7 and 14) are connected together on the board. If using
cable with only one (1) drain wire, then connect the ground (drain wire) to Pin 7.
7. Care must be taken to prevent the drain wire from touching any other component in the module.
8. Attach control wires to the side of the control door where the Inter-Module Board (IMC) is attached. Do not run wires across
the IMC board.
Liebert® NXL™
14
UPS Electrical Installation
Figure 6
Inter-Module Communication Board wiring diagram—Multi-modules
IMC
02-806730-xx
P3103
P3101
UPS 1
2.4
IMC
02-806730-xx
P3103
IMC
02-806730-xx
P3101
P3103
P3101
UPS 3
UPS 2
Digital LBS
The Load Bus Sync interface enables independent UPS units to remain in sync when operating on
battery or when supplied by unsynchronized input sources.
Digital LBS cables that connect the module to the system are connected to terminals P3108 and
P3109 on the Inter-Module Communication (IMC) board. See Figure 7.
Table 6
Wire size, length for digital LBS connection of UPS Inter-Module Communication
Boards
Terminal Designation
From
To
Wire Size/
Max Length
Signal Name
Digital LBS from UPS inter-module communication board to other UPS inter-module
communication board
P3108-1
P3108-1
LBS Synch CANH
P3108-2
P3108-2
LBS Synch CANL
P3108-3
P3108-3
Ground - Drain Wire
3000ft
(900m)
Redundant Digital LBS from UPS Inter-Module Communication Board to Other UPS
Inter-Module Communication Board
P3109-1
P3109-1
Redundant LBS Synch CANH
P3109-2
P3109-2
Redundant LBS Synch CANL
P3109-3
P3109-3
Ground - Drain Wire
1.
2.
3.
4.
5.
6.
Figure 7
3000ft
(900m)
Belden 810x or Belden 89901 cables are the only approved cables.
Each cable group should be run in a separate grounded conduit to ensure redundancy.
The maximum lengths must include all the LBS cables from the first module to the last module.
The primary and redundant cable lengths can be counted separately.
Belden 89901 cable can be used for underground installations.
Attach the control wire to the side of the control door where the Inter-Module Board (IMC) is attached.
Do not run wires across the IMC board.
Inter-Module Communication Board wiring diagram—Digital LBS
IMC
02-806730-xx
UPS 1
P3108
P3109
IMC
02-806730-xx
UPS 2
15
P3108
P3109
IMC
02-806730-xx
P3108
P3109
UPS 3
Liebert® NXL™
UPS Electrical Installation
2.5
Configuring Neutral and Ground Connections
Improper grounding is the largest single cause of UPS installation and startup problems. Grounding
techniques vary significantly from site to site, depending on several factors.
Proper grounding should be based on NEC Section 250, but safe and proper equipment operation
requires further enhancements. The following pages detail recommendations for grounding various
system configurations to ensure optimal UPS system performance.
! CAUTION
The UPS ground lug must be solidly connected to the service entrance ground by an
appropriately sized wire conductor per NEC Article 250. Each conduit or raceway containing
phase conductors must also contain a ground wire, both for UPS input and output, which are
solidly connected to the ground terminal at each termination point. Conduit-based grounding
systems tend to degrade over time. Therefore, using conduit as a grounding conductor for UPS
applications may degrade UPS performance and cause improper UPS operation.
2.5.1
Four-Wire Input connections
The UPS module main input and bypass input are connected to a grounded service. In this
configuration, the UPS module is not considered a separately derived source. The UPS module output
neutral is solidly connected to the building service neutral, which is bonded to the grounding
conductor at the service entrance equipment.
Advantages of this configuration include:
• A measure of common-mode noise attenuation, since the isolation (common-mode rejection) occurs
as close to the load as practical (i.e., at the PDU).
• The UPS module can be located remotely from the PDU without compromising common-mode
noise performance.
• By using UPS modules with 480VAC input and output and creating 208VAC at the PDU, smaller
and less costly power feeders can be used and less voltage drop (as a percent of nominal) occurs.
2.5.2
Three-Wire Input Connections
This configuration must NOT be used when single-phase loads are directly connected to the UPS.
The UPS output transformer is considered a separately derived source. The UPS module neutral is
bonded to the UPS ground, which is connected to a local grounding electrode in accordance with
NEC 250-26. Please note that this configuration represents a price/performance trade-off. Whenever
the UPS module transfers to or from bypass, two AC sources (input and bypass) are briefly connected
together and circulating current must flow. In this configuration, the current flows through the
ground path, possibly tripping ground fault interrupters (GFIs) and distorting the bypass waveform
reference. Proper adjustment of ground fault interrupters is necessary to avoid unwanted tripping.
The time delay should be set to at least 0.2 seconds to prevent tripping when the UPS performs a
transfer or retransfer operation.
NOTICE
Risk of improperly set ground fault interrupters. Can cause equipment damage.
Failure to set the ground fault interrupters properly could cause loss of power to the critical
load.
2.5.3
Preferred Grounding Configuration, Battery Systems
Open-rack battery systems, depending on local code requirements and customer preference, are
normally:
• Floating (ungrounded)
OR
• Center-tapped and floating
Battery cabinet systems must be connected as floating (ungrounded) systems.
Liebert® NXL™
16
UPS Electrical Installation
Center-tapped or grounded battery systems are not possible with battery cabinet systems.
Whether the battery system is open-rack or cabinet, the metal rack parts or cabinet must be grounded
to the UPS module ground bus.
2.5.4
Multi-Module Systems
For both N+1 and 1+N systems, the neutrals of all UPS modules in the system must be connected
together inside the switchgear or parallel cabinet. The neutral conductors must be rated for 20% of
phase conductor current minimum. Site and load conditions will determine if larger neutrals are
required.
For Multi-Module systems using a 3-wire bypass, the Neutral-Ground bond must be made at the
common neutral connection point in the switchgear or parallel cabinet.
2.5.5
High Resistance Ground Systems
The Liebert NXL is compatible with High Resistance Ground Systems. See your local Emerson
representative for details.
2.6
Grounding Diagrams, Single- and Multi-Module Systems
Figure 8
Grounding diagram, three-wire single-module system
UPS
Source
N
N
G
Grounding diagram, four-wire single-module system
UPS
Source
BPSS
N
N
G
G
17
To connect equipment
Figure 9
G
To connect equipment
BPSS
Liebert® NXL™
UPS Electrical Installation
Switchgear
UPS #1
N
Source
G
N
UPS #2
G
N
G
UPS #3
Grounding for 1+N
systems is wired
exactly the same.
Liebert® NXL™
18
N
N
G
G
To connect equipment
Figure 10 Grounding diagram, three-wire multi-module system
UPS Electrical Installation
Figure 11
Grounding diagram, four-wire multi-module system
Switchgear
BPSS
N
Source
G
To connect equipment
UPS #1
UPS #2
N
BPSS
G
N
G
UPS #3
BPSS
19
N
N
G
G
Liebert® NXL™
Optional Equipment
3.0
OPTIONAL EQUIPMENT
3.1
Single-Module System Options
3.1.1
Matching Maintenance Bypass Cabinet
A matching Liebert NXL Maintenance Bypass cabinet is available. See Maintenance Bypass Cabinet
Installation Manual (SL-24532) for more details.
3.1.2
Battery Temperature Sensor
The optional external battery temperature sensor kit, supplied separately from the battery circuit
breaker, contains one probe and one temperature transport board.
3.1.3
Load Bus Synch
An optional Load Bus Synch (LBS) system can be used to synchronize two Liebert NXL UPSs or an
Liebert NXL UPS to a Liebert Series 610 UPS.
3.1.4
Remote Alarm Panel
The remote alarm panel has LED alarm lights. An audible alarm sounds upon any alarm condition.
The surface- or flush-mounted NEMA 1 enclosed panel indicates: Load on UPS, Load on Bypass,
Battery Discharging, Low Battery Warning, Overload Warning, Ambient Overtemp Warning, UPS
Alarm Condition and New Alarm Condition (for a second UPS alarm condition).
3.2
Communication and Monitoring
•
•
•
•
3.2.1
Liebert IntelliSlot™ Unity Card
Alber Battery Monitoring System
Programmable Relay Board
Input Contact Isolator Board
Alber Monitoring System
The matching Liebert NXL Battery Cabinet allows installing an optional Alber Battery monitoring
system in the cabinet. The Alber Battery Monitoring by Liebert continuously checks all critical
battery parameters, such as cell voltage, overall string voltage, current and temperature. Automatic
periodic tests of internal resistance of each battery will verify the battery’s operating integrity.
Additional capabilities include automatic internal DC resistance tests and trend analysis providing
the ability to analyze performance and aid in troubleshooting.
Liebert® NXL™
20
Optional Equipment
3.2.2
Programmable Relay Board
The Programmable Relay Board (PRB) provides a means to trigger an external device when an event
occurs in the Liebert NXL. Each PRB has eight channels. Each channel has Form-C dry contacts
rated at 1A @ 30VDC or 125VAC @ 0.45A.
Any alarm/event can be programmed to any channel or channels. Up to four (4) events can be
programmed to a relay. If multiple events are grouped to one relay, group the events logically to
simplify troubleshooting when an event is triggered. The same alarm/event can be programmed to
more than one channel. Up to two Programmable Relay Boards can be installed in the Liebert NXL
for a total of 16 channels. Programming is performed through the HMI touchscreen display.
NOTE
Up to two (2) PRB’s can be installed in the Liebert NXL.
Figure 12 Control wiring, Programmable Relay Board
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
J71
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
J72
1 2 3
1 2 3 4 5 6 7 8 9 10111213141516
J73
J74
1.
2.
3.
4.
5.
6.
Customer control wiring connection points are terminals 1 through 15. (Pin 16 not used on J71, J72, and
J73.)
Programmable Relay Board option includes eight signal channels with two Form-C dry contacts per
channel (see Table 7).
All control wiring (by others) must be run separate from power wiring. Control wiring runs should not be
combined in the same conduit.
Contact ratings: 1A @ 30VDC or 125VAC @ 0.45A
Maximum cable length 500 ft. (152m) with #16AWG and flexible stranded cable.
All wiring must be in accordance with national and local electrical codes.
Table 7
Terminal
Block
Programmable Relay Board pinout
Channel
CH1
J71
CH2
CH3
J72
CH4
CH5
CH6
TB3
J74
CH7
CH8
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
Pin No.
Common
Normally
Closed
Normally
Open
1-3
4-6
7-9
10-12
13-15
1-3
4-6
7-9
10-12
13-15
1-3
4-6
7-9
10-12
13-15
1-3
1
4
7
10
13
1
4
7
10
13
1
4
7
10
13
1
2
5
8
11
14
2
5
8
11
14
2
5
8
11
14
2
3
6
9
12
15
3
6
9
12
15
3
6
9
12
15
3
Note: Pin 16 not used on J71, J72, and J73.
21
Liebert® NXL™
Optional Equipment
Configuring the Programmable Relay Board Settings
1. Press Internal Option Settings from the Config menu.
2. Press which Programmable Relay Board will be configured. The Programmable Relay Board
dialog box is displayed.
3. Press the Relay channel
4. Press up to four (4) events. Selected events will show up under Relay 1 Assignment.
NOTE
To deselect an event, click on the event.
5. Repeat Steps 3 and 4 for each relay.
6. Press SAVE to keep the settings.
Figure 13 Programmable relay board dialog box
• Assignment—0 to 4 event (default: 0)
• Delay, sec—0 to 99.9 (default: 0)
3.2.3
Input Contact Isolator Board
The Input Contact Isolator Board (ICI) provides a Liebert NXL module interface for up to eight
external user alarm or message inputs to be routed through the NXL’s alarm network. The eight
contacts are normally open dry contacts. When a contact closes, an event is triggered.
NOTE
Up to two (2) ICI’s can be installed in a Liebert NXL.
The Input Contact Isolator options are configured through the Input Contact Isolator dialog box,
which is accessed from the Internal Option Settings under the Config dialog box on the HMI
touchscreen display. The Input Contact Isolator dialog box contains eight choices to match the eight
channel input board. You can label each button to identify the event associated with the contact.
When the dialog box is accessed, each button flashes to display the Input Contact Isolator number
and the user entered label. This label also appears in the Display Panel when an event related to an
Input Isolator Connector is triggered.
Liebert® NXL™
22
Optional Equipment
The Input Contact Isolator dialog box allows you to:
• Label the input contact assignments for your setup.
• Set the delay for an external event triggering an alarm.
• Review the isolator contact assignments, once the labels are entered.
The delay allows setting the number of seconds that a condition must exist before it will trigger an
alarm. To configure the Input Contact Isolator relays:
1. Press Internal Option Settings from the Config menu.
2. Press which Input Contact Isolator is to be configured. The Input Contact Isolator dialog box is
displayed.
Figure 14 Input contact isolator dialog box
•
•
•
3.
Assignment—Custom, Pre-assigned (default: “Input Contact” XY)
Delay, sec—0 to 99.9 (default: 0)
Message—Custom: 0-19 characters
To assign labels for each channel:
a. Press Pre-assigned for default labels on Channels 1-6 (See Table 8)
b. For Custom labels
1. Press Custom to unique labels.
2. Click on Input Contact XX button. A keyboard is displayed to allow naming alarms.
3. Enter the name of the alarm set for that input. For example, a fan problem could be
indicated by naming the button FAN.
4. Press OK on the keyboard to keep your label.
4. Press DELAY.
a. A keypad is displayed prompting you for a delay time, in seconds, for a condition to exist
before the alarm is triggered.
b. Enter the delay value. The range for the values are from 0 (zero) to 99.9 seconds.
c. Press OK on the keypad to keep your setting. The value you entered is displayed in the field
adjacent to the corresponding input contact.
5. Repeat Steps 3 and 4 for each input contact.
23
Liebert® NXL™
Optional Equipment
6. Press SAVE after you have configured all input contacts.
Be sure to press Save even if you have accessed this dialog only to change a setting.
7. This information is not saved if control power is removed.
Table 8
Input Contact Isolator Board pre-assigned values
Channel
Number
ICI #1
Pre-Assigned Label
ICI #2
Pre-Assigned Label
1
2
3
4
5
6
7
8
Reduced Rect ILimit
Reduced Batt ILimit
Stop Battery Charge
Inhibit Rect Restrt
Inhibit Byp Restrt
Inhibit Inv Restrt
Input Trap Filter Disconnect
Suspend ECO Mode
Stop Battery Charge
Stop Battery Charge
Stop Battery Charge
Stop Battery Charge
Stop Battery Charge
Stop Battery Charge
Inhibit IP Standby
Figure 15 Optional Input Contact Isolator Board
Table 9
No Customer Connection
Input Contact Isolator Board
control wiring connections
Input Contact
1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
J51
2
3
4
1.
2.
3.
4.
5.
6.
Customer control wiring connection points are terminals 1 through 16 (see
Table 9).
Customer provided normally open dry contacts for user alarm messages.
All control wiring (by others) must be run separate from power wiring.
Control wiring runs should not be combined in the same conduit.
Signal voltage: 100mA @ 12VDC.
Maximum cable length 500 ft. (152m) with #16AWG and flexible stranded
cable.
All wiring must be in accordance with national and local electrical codes.
Liebert® NXL™
24
5
6
7
8
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Installation Drawings
4.0
INSTALLATION DRAWINGS
Figure 16 Outline drawing, 250kVA, 480V Liebert NXL
57.5"
(1460mm)
64.2"
(1630mm)
Cable Entry
Conduit Plte
See Detail A
TOP VIEW
(Doors Open)
71.8" (1824mm)
15"
(380mm)
2.2 (57mm)
Outside
Panel
33.5" (850mm)
.9" (23mm)
Outside
Panel
21.4"
(544mm)
Power Cable
Conduit Plate
Control Cable
Conduit Plate
6.9" (175mm)
76.8"
(1950mm)
FRONT
CONDUIT
DETAIL A
11.4"
(290mm)
RIGHT SIDE
FRONT
Cable Entry
Conduit Plate
See Detail B
Control Cable
Conduit Plate
Power Cable
Conduit Plate
7.3"
(185mm)
BOTTOM
10.4"
(264mm)
1.7" (43mm)
Outside Frame
2.5" (64mm)
To Outside
7.1" (180mm)
.2"
(5mm)
21.9
(556mm)
11.9"
(302mm)
Notes
1. All dimensions are in inches (mm).
CONDUIT
2. 24" minimum clearance above unit required for air exhaust.
DETAIL B
3. Keep cabinet within 15 degrees of vertical while handling.
4. Top and bottom cable entry available through removable conduit plates.
Remove, punch to suit conduit size and replace.
5. Unit bottom is structurally adequate for forklift handling.
6. Control wiring and power wiring must be run in separate conduits.
7. All wiring is to be in accordance with national and local electrical codes
8. Width dimension is with side panels. Subtract 1.4" (35mm) for dimensions
with both side panels removed.
U40-2C-1001
9. Depth dimension includes the front door and rear panel.
Rev. 6
10. Refer to technical information drawing for 250kVA/225kW UPS.
25
12.1"
(307mm)
2.6 (66mm)
Outside Frame
Liebert® NXL™
Installation Drawings
Figure 17 Outline drawing, 250kVA, 575/600V; and 300kVA, 480/575/600V Liebert NXL
Cable Entry
Conduit Plate
See Detail A
63.8"
(1620mm)
TOP VIEW
(Doors Open)
78.5" (1994mm)
2.2" (57mm)
Outside Panel
15"
(380mm)
.9" (23mm)
Outside
Panel
33.5"
(850mm)
21.4"
(544mm)
Power Cable
Conduit Plate
6.9" (175mm)
Control Cable
Conduit Plate
76.8"
(1950mm)
12.1
(307mm)
CONDUIT
DETAIL A
FRONT
RIGHT SIDE
11.4"
(290mm)
FRONT
Cable Entry
Conduit Plate
See Detail B
Control Cable
Conduit Plate
Power Cable
Conduit Plate
7.3"
(185mm)
BOTTOM VIEW
Notes:
1. All dimensions are in inches (mm).
2.24" minimum clearance above unit required for air exhaust.
3. Keep cabinet within 15 degrees of vertical while handling.
4. Top and bottom cable entry available through removable
conduit plates. Remove, punch to suit conduit size and replace.
5. Unit bottom is structurally adequate for forklift handling.
6. Control wiring and power wiring must be run in separate conduits.
7. All wiring is to be in accordance with national and local electrical codes.
8. Width dimension is with side panels. Subtract 1.4" (35mm) for
dimensions with both side panels removed.
9. Depth dimension includes the front door and rear panel.
10. Refer to technical information drawing for 250kVA 575V or 600V UPS.
Liebert® NXL™
26
10.4"
(264mm)
1.7" (43mm)
Outside Frame
2.5" (64mm)
to Outside
7.1" (180mm)
.2"
(5mm)
21.9"
(556mm)
11.9"
(302mm)
CONDUIT
DETAIL B
U40-2C-1006
Rev. 2
2.6" (66mm)
Outside Frame
Installation Drawings
Figure 18 Outline drawing, 400kVA, 480V Liebert NXL
15.0"
(380mm)
2.2" (57mm)
Outside
of Panel
Cable Entry
Conduit Plate
See Detail A
69.5"
(1766mm)
.9" (23mm)
Outside Panel
Power Cable
Conduit Plate
27.3"
(693mm)
Top View (Doors Open)
Control Cable
Conduit Plate
6.9"
(175mm)
39.4"
(1000mm)
78.5"
(1994mm)
CONDUIT
DETAIL A
12.1"
(307mm)
76.8"
(1950mm)
11.4"
(290mm)
1.7" (43mm)
Outside Frame
2.5" (64mm)
To Outside
7.1" (180mm)
FRONT VIEW
.2"
(5mm)
RIGHT SIDE VIEW
FRONT
Control Cable
Conduit Plate
Cable Entry
Conduit Plate
See Detail B
Power Cable
Conduit Plate
7.3"
(185mm)
11.1"
(281mm)
27.8"
(706mm)
11.9"
(302mm)
2.6" (66mm)
CONDUIT
BOTTOM VIEW
Outside Frame
Note:
DETAIL B
1. All dimensions are in inches (mm).
2. 24" (610) minimum clearance above unit required for air exhaust and 36" (914)
front access required for service.
3. Keep cabinet within 15 degrees of vertical while handling.
4. Top and bottom cable entry available through removable access plates.
Remove, punch to suit conduit size and replace.
5. Unit bottom is structurally adequate for forklift handling.
6. Control wiring and power wiring must be run in separate conduits.
7. All wiring is to be in accordance with national and local electrical codes.
8. Width dimension includes side panels. Subtract 1.4" (35mm) when removing both side panels.
9. Depth dimension includes the front door and rear panel.
U40-4C-1001
10. See technical information drawing for shipping weights.
Rev. 5
27
Liebert® NXL™
Installation Drawings
Figure 19 Outline drawing, 400kVA, 575V/600V Liebert NXL
Cable Entry
Conduit Plate
Actual Usable Area
10.2" x 34.2"
(260mm x 870mm)
75.3"
(1912mm)
TOP VIEW
76.8"
(1950mm)
UPS Cabinet
I/O Bypass Cabinet
61.8" (1570mm)
36.6" (930mm)
39.4"
(1000mm)
98.4" (2500mm)
FRONT VIEW
RIGHT SIDE VIEW
FRONT
Outside
Frame
2.9"
(74mm)
FRONT
To Outside
Cable Entry
Conduit Plate
See Detail A
Cable Entry
Conduit Plate
Actual Usable Area
12.8" x 34.2"
(325mm x 870mm)
BOTTOM VIEW
NOTE:
1. All dimensions are in inches (mm).
2. 24" (610) minimum clearance above unit required
for air exhaust, and 36" (914) front access required for service.
3. Keep cabinet within 15 degrees of vertical while handling.
4. Top and bottom cable entry available through removable
access plates. Remove punch to suit conduit size and replace.
5. Unit bottom is structurally adequate for forklift handling.
6. Control wiring and power wiring must be run in separate conduits.
7. All wiring is to be in accordance with national and local electrical codes
8. Width dimension includes one side panel. Subtract 0.7" (17mm)
when removing the side panel.
9. Depth dimension includes the front door and rear panel.
10. See technical information drawing for shipping weights.
Liebert® NXL™
28
Detail A
I/O Bypass Cabinet
Bottom
Cable Entry
U40-4C-1006
Rev. 2
3.1"
(80mm)
Installation Drawings
Figure 20 Outline drawing, 400kVA, 575V/600V Liebert NXL with DC I/O cabinet
Cable Entry
Conduit Plate
Actual Usable Area
10.2" x 34.2"
(260mm x 870mm)
(Service)
Access Plate
12" x 12.3"
(305mm x 312mm)
19.2"
(488mm)
Cable Entry
Conduit Plate
Actual Usable
Area
12.1"
(307mm)
75.3"
(1912mm)
TOP VIEW
76.8"
(1950mm)
DC I/O Cab.
UPS Cabinet
I/O Bypass Cabinet
77.9" (1978mm)
36.6" (930mm)
114.5" (2908mm)
RIGHT SIDE VIEW
FRONT VIEW
Outside 3.1"
Frame (80mm)
FRONT
To Outside
2.9"
(74mm)
Outside
Frame
FRONT
To Outside
2.5"
(64mm)
Cable Entry
Conduit Plate
Actual Usable Area
12.8" x 34.2"
(325mm x 870mm)
Cable Entry
Conduit Plate
Actual Usable Area
9.2" x 34.2"
(233mm x 870mm)
39.4"
(1000mm)
DETAIL A
DC I/O Cabinet
Bottom Cable Entry
DETAIL B
I/O Bypass Cabinet
Bottom Cable Entry
FRONT
3.1"
(80mm)
Note:
1. All dimensions are in inches (mm].
2. 24" (610) minimum clearance above unit
required for air exhaust and 36" (914)
front access required for service.
3. Keep cabinet within 15 degrees of vertical
while handling.
4. Top and bottom cable entry available
through removable access plates. Remove,
punch to suit conduit size and replace.
5. Unit bottom is structurally adequate for
forklift handling.
6. Control wiring and power wiring must be
run in separate conduits.
7. All wiring is to be in accordance with national
and local electrical codes.
8. Width dimension includes side panels.
Subtract 1.4" (35mm) when removing both
side panels.
9. Depth dimension includes the front door
and rear panel.
10. See technical information drawing
for shipping weights.
Cable Entry
Conduit Plate
See Detail B
Cable Entry
Conduit Plates
See Detail A
U40-4C-1008
Rev. 2
BOTTOM VIEW
29
Liebert® NXL™
Installation Drawings
Figure 21 Main components, 250kVA, 480V Liebert NXL
HMI Keylock or
EMO Button
(Optional)
Liebert
IntelliSlot
Housings
HMI Screen
External
Interface
Board (EIB)
Module Output
Circuit Breaker (CB2)
Main Input
Circuit Breaker (CB1)
Back Feed
Breaker (BFB)
Option Box
(6 Slots Available)
Input/Output
Cabinet
Doors and Inner Skins Removed
Liebert® NXL™
30
U40-2C-1000
Rev. 4
Installation Drawings
Figure 22 Main components, 250kVA, 575/600V, and 300kVA, 480/575/600V Liebert NXL
HMI Screen
HMI Keylock or
EMO Button
(Optional)
Liebert
IntelliSlot
Housings
External
Interface
Board (EIB)
Module Output
Circuit Breaker (CB2)
Back Feed
Breaker (BFB)
Main Input
Circuit Breaker (CB1)
Option Box
(6 Slots Available)
Input/Output
Cabinet
Doors and Inner Skins Removed
31
U40-3C-1000
Rev. 5
Liebert® NXL™
Installation Drawings
Figure 23 Main components, 400kVA, 480V Liebert NXL
HMI Keylock or
EMO Button
(Optional)
HMI Screen
Liebert
IntelliSlot
Housings
External
Interface
Board (EIB)
Module Output
Circuit Breaker (CB2)
Main Input
Circuit Breaker (CB1)
Back Feed
Breaker (BFB)
Option Box
(6 Slots Available)
Input/Output
Cabinet
Doors and Inner Skins Removed
Liebert® NXL™
32
U40-4C-1000
Rev. 3
Installation Drawings
Figure 24 Main components, 400kVA, 575V/600V Liebert NXL
HMI Screen
External
Interface
Board
(EIB)
Module Output
Circuit Breaker
(CB2)
Main Input
Circuit
Breaker
(CB1)
Backfeed
Breaker
(BFB)
DC Negative
Busbar
DOORS REMOVED
DC Positive Busbar
Liebert
IntelliSlot
Housings
Bypass Input
& Neutral
Busbars
Output
& Neutral
Busbars
Rectifier
Input
Busbars
Ground
Busbar
DOORS AND INNER SKINS REMOVED
33
U40-4C-1005
Rev. 0
Liebert® NXL™
Installation Drawings
Figure 25 Main components, 400kVA, 575V/600V Liebert NXL with DC I/O cabinet
HMI Screen
Module Output
Circuit Breaker
(CB2)
External
Interface
Board (EIB)
Backfeed
Breaker (BFB)
Main Input
Circuit
Breaker
(CB1)
DOORS REMOVED
Liebert
IntelliSlot
Housings
Bypass Input &
Neutral Busbars
DC PosItive
Busbar
Output &
Neutral Busbars
DC Negative
Busbar
Ground
Busbar
Rectifier
Input
Busbars
Ground
Busbar
DOORS AND INNER SKINS REMOVED
Liebert® NXL™
34
U40-4C-1007
Rev. 0
Installation Drawings
Figure 26 Input/output conduit detail drawing, 250-300kVA, all voltages, Liebert NXL
DC
3" Conduit, 2 Places
Input
3.5" Conduit, 2 Places
Output
3.5" Conduit, 2 Places
Input
3.5" Conduit, 2 Places
DC
3" Conduit, 2 Places
Output
3.5" Conduit, 2 Places
Low Voltage
1.5" Conduit
FRONT
TOP VIEW
Low Voltage
1" Conduit, 14 Places
Low Voltage
1.5" Conduit
FRONT
BOTTOM VIEW
Extended position
76.8" (1950mm)
See Detail D
For DC Busbars
Bypass
Neutral
DC Positive
DC Negative
Ground Bus
(Top Entry)
See Note 6
See Detail D
For Input Busbars
59.4" (1509mm)
56.4" (1432mm)
UPS Input
52.9" (1343mm)
49.4" (1255mm)
46.4" (1178mm)
43.4" (1102mm)
B
D
31.4" (797mm)
28.4" (721mm)
25.4" (645mm)
Output
Inner Panel
Removed
For Clarity
21.9" (556mm)
Ground Bus
(Bottom Entry)
A
C
Output
Neutral
FRONT
Ø .56"
(14mm)
Typical
.87"
(22mm)
1.75
.87"
(44mm)
Typical (22mm)
1.75
1.75 (44mm)
(44mm) Typical
Typical
.98"
(25mm)
(Top
Entry)
1.10"
(28mm)
DETAIL A
RIGHT SIDE VIEW
1.75
(44mm) (Bottom
Typical
Entry)
.0"
(0mm)
Ø .56"
(14mm) Typical
Ø .56"
(14mm)
Typical
1.75
(44mm)
Typical
DETAIL C
Notes:
DETAIL B
1. All dimensions are in inches (mm).
1.75
2. 24" (610) minimum clearance above unit required for air exhaust,
(44mm)
and 36" (914) front access required for service.
Typical
3. Keep cabinet within 15 degrees of vertical while handling.
(Bottom
4. Top and bottom cable entry available through removable
Entry)
access plates. Remove punch to suit conduit size and replace.
5. Unit bottom is structurally adequate for forklift handling.
.88" x .56" Slot
6. These brackets can be removed during installation but must be
(22mm x 14mm)
replaced after installation.
6 Places
7. Control wiring and power wiring must be run in separate conduits.
Each Bar
8. All wiring is to be in accordance with national and local electrical
codes.
35
1.75
(44mm)
Typical
(Top Entry)
DETAIL D
Ø .56"
(14mm) Typical
U40-3E-1400
Rev. 3
Liebert® NXL™
Installation Drawings
Figure 27
Input/output terminal detail, 400kVA, 480V Liebert NXL
DC
(2) 3" Conduit
Bypass
(2) 3.5" Conduit
Ø.56
(14)Typ.
Output
(2) 3.5" Conduit
.87 (22)
.98 (25)
Input
(2) 3" Conduit
Input
(2) 3" Conduit
Output
(2) 3.5" Conduit
Bypass
(2) 3.5" Conduit
1.75 (44)
Typ.
.87
(22)
DC
(2) 3" Conduit
1.1
(28)
DETAIL A
Low Voltage
1.5" Conduit
1.75 (44)
Typ. (Bottom (Entry)
Low Voltage
(14) 1" Conduit
Low Voltage
(14) 1" Conduit
1.75 (44)
Typ.(Top
(Entry)
BOTTOM VIEW
TOP VIEW
76.8
(1950)
Bypass
Neutral
DC Positive
Dc Negative
Ground Bus
Location
(Top Entry)
DETAIL
59.4 (1509)
56.4 (1432)
1.75 (44)
52.9 (1343)
Typ.
49.4 (1255)
46.4(1178)
43.4 (1102)
.56
40.4 (1026)
(14)Typ.
37.4 (950)
34.4 (874)
31.4(797)
28.4 (721)
25.4 (645)
21.9 (556)
B
See Note 6
Bypass Input
Rectifier Input
D
Output
Inner Panel
Removed
For Clarity
A
Ground Bus
(Bottom Entry)
Output
Neutral
0
FRONT
Liebert® NXL™
RIGHT SIDE VIEW
36
1.75 (44)
Typ.
DETAIL C
1.75 (44)
Typ. (Top
(Entry)
1.75 (44)
Typ.
(Bottom
(Entry)
C
NOTES
1. All dimensions are in inches (mm).
2. 24" minimum clearance above unit required
for air exhaust.
3. Keep cabinet within 15 degrees of vertical.
4. Top and bottom cable entry available through
removable access plates. Remove, punch to
suit conduit size and replace.
5. Unit bottom is structurally adequate for forklift handling.
B
Ø .56
(14)Typ.
.88 x .56 Slot
6 Places DETAIL
Each Bar
D
Ø .56
(14)Typ.
6. These brackets can be removed during installation but
must be replaced after installation.
7. Control wiring and power wiring must be run in separate conduits.
8. Unless otherwise noted, use copper or aluminum conductors
suitable for at least 75°C.
9. All wiring is to be in accordance with national and local
electrical codes.
Installation Drawings
Figure 28 Input/output terminal detail, 400kVA, 575V/600V Liebert NXL
BOTTOM
Cable Entry
Conduit Plate
12.8" x 33.9"
(325mm x 861mm)
FRONT
TOP
Cable Entry
Conduit Plate
12.6" x 37"
(320mm x 940mm)
Bypass Input
and Neutral
See Detail A
3.1" (80mm)
Typ.
Between
Busbars
51.4"
(1305mm)
Output
and Neutral
See Detail B
Ground
See Detail D
32.9"
(835mm)
15.6"
(396mm)
RIGHT SIDE VIEW
3.1"
(80mm)
Typ. Between
Busbars
Ø .512"
(13mm) Typ.
DETAIL A
Detail A & B:
Suitable for two-hole lugs
(3 each) at 1.75" spacing
between hole centers and
1.75" max. tongue width.
15.2"
(385mm)
Rectifier Input
See Detail C
FRONT
Ø .512"
(13mm) Typ.
DETAIL B
Ø.563" (014mm) Typ.
Notes:
1.75" (44mm)
1.75" (44mm)
1. All dimensions are in inches (mm).
2. 24" minimum clearance above unit is required.
3. Keep cabinet within 15 degrees of vertical.
2.56"
0.87" (22mm)
4. Top and bottom cable entry available through removable
(65mm) Typ
0.99" (25mm)
access plates. Remove and punch to suit conduit size
1.1" (28mm)
and replace.
DETAIL D
5. Unit bottom is structurally adequate for forklift handling.
Ø .512"
6. These brackets can be removed during installation but must
(13mm) Typ.
U40-4E-1408
be replaced after installation.
DETAIL C
Rev. 0
7. Control wiring and power wiring must be run in separate conduits
8. All wiring is to be in accordance with national and local electrical codes.
37
Liebert® NXL™
Installation Drawings
Figure 29 Input/output terminal detail, 400kVA, 575V/600V Liebert NXL with DC I/O cabinet
FRONT
Ø.563" (014mm) Typ.
1.75"
(44mm)
Cable Entry
Conduit Plate
9.2" x 17.1"
(233 x 435mm)
2 Places
2" (51mm) Typ.
Cable Entry
Conduit Plate
20.6" x 15"
(524 x 381mm)
BOTTOM
DETAIL A
DC POSITIVE
Ø.563" (014mm) Typ.
1.75"
(44mm)
FRONT
TOP
2" (51mm) Typ.
DETAIL B
DC NEGATIVE
Ø.563" (014mm) Typ.
1.75"
(44mm)
DC Positive
See Detail A
1.75" (44mm)
DETAIL C
DC Negative
See Detail B
47.1"
(1197mm)
Ground
See Detail C
35.3"
(897mm)
24.5"
(622mm)
FRONT
LEFT SIDE VIEW
Liebert® NXL™
38
GROUND
NOTES
1. All dimensions are in inches (mm).
2 .24" minimum clearance above unit is required.
3 . Keep cabinet within 15 degrees of vertical.
4. Top and bottom cable entry available through
removable access plates. Remove and punch
to suit conduit size and replace.
5. Unit bottom is structurally adequate for
forklift handling.
6. These brackets can be removed during installation
but must be replaced after installation.
7. Control wiring and power wiring must be run
in separate conduits
8. All wiring is to be in accordance with national
and local electrical codes.
U40-4E-1407
Rev. 0
Installation Drawings
Figure 30 Top cable entry routing and installation order
FOR UNIT RATINGS
250kVA- 480/575/600V
300kVA- 480/575/600V
400kVA- 480V
Output Conduit
Input Conduit
Bypass Conduit
DC Conduit
DC (Positive)
DC (Negative)
DC (Positive)
DC (Negative)
Ground
(Top Entry)
Bypass Neutral
Bypass
Neutral
Fault Brace
Bypass Input
Fault Brace
Rectifier Input
Fault Brace
Output
Bypass
Input
Bypass Input
(Phase C)
Fault Brace
Bypass Input
Rectifier Input
(Phase C)
Fault Brace
Rectifier Rectifier Input
Input
Fault Brace
Output
OUTPUT
Output (Phase C)
Ground
(Bottom Entry)
Output
Neutral
Output Neutral
FRONT VIEW
SIDE VIEW
Recommended cable
installation order :
1. DC Power
2. Bypass Neutral
3. Bypass Input Power
(Phases A-B-C)
4. Rectifier Input Power
(Phases A-B-C)
5. Output Power
(Phases A-B-C)
6. Output Neutral
7. Ground
The cables must be routed
around the fault braces
to prevent the cables from
coming in contact with
other busbars.
39
Liebert® NXL™
Installation Drawings
Figure 31 Bottom cable entry routing and installation order
FOR UNIT RATINGS
250kVA- 480/575/600V
300kVA- 480/575/600V
400kVA- 480V
DC (Positive)
DC (Negative)
Ground (Top Entry)
DC (Positive)
DC (Negative)
Bypass Neutral
Bypass Neutral
Fault Brace
Bypass Input
Fault Brace
Rectifier Input
Fault Brace
Output
Bypass Input
Fault Brace
Bypass Input
Bypass Input
(Phase C)
Fault Brace
Rectifier Input
Rectifier
Input
Rectifier
Input
(Phase C)
Fault Brace
Output
Output
(Phase C)
Output
Ground (Bottom Entry)
Output
Neutral
Output Neutral
DC Conduit
FRONT VIEW
Output
Conduit
Input Conduit
Bypass Conduit
SIDE VIEW
Recommended cable
installation order :
1.) Output Neutral
2.) Output Power
(Phases A-B-C)
3.) Rectifier Input Power
(Phases A-B-C)
4.) Bypass Input Power
(Phases A-B-C)
5.) Bypass Neutral
6.) DC Power
7.) Ground
The cables must be routed
around the fault braces
to prevent the cables from
coming in contact with
other busbars.
Liebert® NXL™
40
Installation Drawings
Figure 32 Single-input busbar arrangement—250-400kVA units
12 x4
13 x4
11
13
x4
14 x8
15 x4
3 Places
Isometric View
250, 300 and 400kVA Units
Not all parts shown for clarity
Figure 33 Low-voltage cable entry—250-400kVA units
REMOVE PLATES
FLIP PLATES
INSTALL
Low-voltage cables can be install through the top of each unit. The entry conduit landing plate is shipped inverted.
To install, remove conduit plate, flip and reinstall. Removal of side plate is for access to pull wires.
41
Liebert® NXL™
Specifications
5.0
SPECIFICATIONS
Table 10
Liebert NXL UPS specifications
250kVA
480V
250kVA
575/600V
300kVA
480V
Input Parameters
Input Voltage to Rectifier, VAC
Input Voltage to Bypass, VAC
400kVA
480V
400kVA
575/600V
480/575/600V 3-phase, 3-wire
480/575/600V 3-phase, 3-wire
+10% to -15
-15% to -20% *
-20% to -30% **
<-30% ***
60
Input Voltage Range, VAC
Input Frequency, Hz
Permissible Input Frequency Range,
Hz
Reflected Input THDi at Nominal
Voltage at Full Load, %
Power Walk-In, sec
Bypass Neutral Current
Battery & DC Parameters
Battery Type
Nominal Battery Bus, VDC
Battery Float Voltage, VDC
Minimum End of Discharge Voltage,
VDC
DC Ripple Voltage in Float & Const
V Ch. Mode, %
Temperature Compensated Battery
Charging
Output Parameters
Inverter Type
Output Power, kW
Output Voltage, VAC
Output Voltage Regulation, %
Output Voltage Regulation (100%
Unbalanced Load)
Output Frequency, Hz
Output Frequency Regulation, %
Output THDv Linear Load at
Nominal Voltage, %
Output THDv at Nominal Voltage
Including a 100kVA Non Linear Load
per EN 62040-3, %
Capacity to Handle High Crest
Factor Load
Capacity to handle Step Load, %
Transient Recovery (linear loads), %
Unbalance Loads Current Capacity
300kVA
575/600V
55 to 65
<10% with 6-pulse & Passive Filter
1 to 30 (selectable) in 1 sec. Increment
1.7 times full-phase current
VRLA (Valve Regulated Lead Acid) or (FLA) Flooded Lead Acid
480V
540V
384V (for VRLA / Flooded Lead Acid)
<1 (RMS value) < 3,4% Vpp
Standard (with temperature probe)
225
IGBT-based Sine-Sine PWM Controlled
270
480V 3-ph, 4-w
< 1% (3-phase RMS average)
< 2% (3-phase RMS average)
60
± 0.1
<2%
2.5% (max)
3:1
0-100 or 100-0
Within 5% peak-to-peak in one line cycle.
100% of nominal phase current
* The UPS will operate at full load, but the battery charge will either be reduced or off (depending on input current).
** The UPS will operate at full load, but UPS may source share with the batteries (depending on input current).
*** UPS will be in Battery mode
Liebert® NXL™
42
360
400kVA
575/600V
with DC
I/O
Cabinet
Specifications
Table 10
Liebert NXL UPS specifications (continued)
250kVA
480V
Capacity to Handle Leading PF Load
0.9 lag to Nom
at 0.95 Lead
at 0,9 Lead
Voltage Displacement, ° el
Overload Conditions, % FL
Physical Parameters and Standards, in (mm)
71.8
Width, With Side Panels 1
(1823)
33.5
Depth 2
(850)
Height
SMS Weight, Unpacked, lb. (kg)
3965
approximate
(1798)
1+N Weight, Unpacked, lb. (kg)
4040
approximate
(1833)
Max heat Dissipation, Full Load, <54,000
BTU/hr (kW)
(15.8)
Cooling Air CFM
Color
Front Door Opening (for
serviceability)
Degree of Protection for UPS
Enclosure
Minimum Clearance, Top, in (mm)
Minimum Clearance, Back, in (mm)
Minimum Clearance, Sides, in (mm)
Location of Cable Entrance
Standards and Conformities
Environmental Parameters
Storage Temperature Range, °F
(°C)
Operating Temperature Range, °F
(°C)
Acoustical Noise, dBA
Relative Humidity
Maximum Altitude Above MSL, ft (m)
250kVA
575/600V
300kVA
480V
300kVA
575/600V
400kVA
480V
400kVA
575/600V
400kVA
575/600V
with DC
I/O
Cabinet
Subject to Max. kW rating
Subject to Max. kW rating
Subject to 12.5% kW derate or same Rating
and 50°F (10°C) Temp. Derate
120° ±1° el (with 100% unbalanced load)
105% for 85 minutes
110% for 60 minutes
125% for 10 minutes
150% for 1 minute
98.4
(2500)
114.5
(2908)
7945
(3604)
8045
(3649)
<86,300
(25.3)
7092
8275
(3754)
8375
(3799)
<86,300
(25.3)
78.5 (1993)
39.4 (1000)
5440
4840
(2468)
(2195)
5515
4915
(2502)
(2229)
<54,000
<62,000
(15.8)
(18.2)
5894
76.8 (1950)
5440
6280
(2468)
(2849)
5515
6380
(2502)
(2894)
<64,500
<74,500
(18.9)
(21.8)
Black (ZP-7021)
More than 180°
IP 20 (with and without front door open)
24 (610)
0
0
Top or Bottom
UL 1778, 4th Ed; CSA 22.2 107.3; FCC Part 15, Class A
FCC, Class A—Standard; IEC62040-2, Level 4, Criteria A
EN61000-4-3, Level 3, Criteria A;
EN61000-4-6, Level 4, Criteria A; EN61000-2-2, Criteria A
EN61000-4-4, Level 4, Criteria A
ANSI C62.41, Category A3 &B3; IBC 2012/CBC 2010
ISTA Procedure 1H; WEEE
-13 to 158 (-25 to 70)
32 to 104 (0 to 40) (UPS)
68
95% or less
Non-Condensing (Operating and Non-Operating)
4920 (1500) (as per IEC 62040/3) - 1% Max kW
derate / 328 rise between 4921-9842
(100m rise between 1500-3000m)
1. Width dimensions are with side panels attached. Subtract 1.4" (35mm) for dimensions without side panels.
2. Depth dimensions include the front door and rear panel.
43
Liebert® NXL™
Specifications
Table 11
Current ratings—rectifier input
UPS Rating
kVA
kW
Voltage,
VAC
Nominal
Current
Maximum
Current
250
225
480
312
389
250
225
575
260
326
250
225
600
250
312
300
270
480
371
464
300
270
575
308
386
300
270
600
295
368
400
360
480
497
621
400
360
575
419
524
400
360
600
401
502
Table 12
Current ratings—bypass input
UPS Rating
kVA
kW
Voltage,
VAC
Nominal
Current
250
250
250
300
300
300
400
400
400
225
225
225
270
270
270
360
360
360
480
575
600
480
575
600
480
575
600
301
251
241
361
301
289
481
402
385
Table 13
Current ratings—output
UPS Rating Voltage, Nominal
kVA kW
VAC
Current
250
250
250
300
300
300
400
400
400
225
225
225
270
270
270
360
360
360
Table 14
480
575
600
480
575
600
480
575
600
301
251
241
361
301
289
481
402
385
Notes on Tables
1. Nominal input current (considered continuous) is based on full-rated
output load. Maximum current includes nominal input current and
maximum battery recharge current (considered noncontinuous).
Continuous and noncontinuous current are defined in NEC 100.
2. Maximum input current is controlled by the current limit setting, which
is adjustable. Values shown are for a maximum setting of 125%. The
standard factory setting is 125%. If a smaller input feed breaker is used,
the input current limit must be adjusted accordingly.
3. For units with an input transformer, the Rectifier Input Feed Breaker
must be set to handle the Liebert NXL transformer inrush of up to eight
times the nominal current.
4. For breaker coordination while the module is overloaded, see the currentversus-time values on the overload curves, Figures 34 and 35.
5. The battery current is at an EOD voltage of 1.61 volts/cell.
Current ratings—battery
UPS Rating
kVA
kW
AC Input/Output
Voltage, VAC
Maximum Battery
Current at EOD
250
300
400
400
225
270
360
360
480, 575 and 600
480, 575 and 600
480
600
615
730
980
990
Liebert® NXL™
44
Specifications
Table 15
Recommended conduit and cable sizes
UPS Rating
kVA
kW
250
225
250
Voltage
(VAC)
(# of conduits); size of conduits; # -size of phase cables per conduit; size of cable
for ground per conduit
Copper Conductors
Aluminum Conductors
480
(2) 2C 3-250kcmil, #3AWG
(2) 2C 3-350kcmil, #1AWG
225
575
(2) 1.5C 3-#4/0AWG, #3AWG
(2) 1.5C 3-250kcmil, #1AWG
250
225
600
(2) 1.5C 3-#4/0AWG, #3AWG
(2) 1.5C 3-250kcmil, #1AWG
300
270
480
(2) 2C 3-350kcmil, #2AWG
(2) 2.5C 3-500kcmil, #1/0AWG
300
270
575
(2) 2C 3-250kcmil, #3AWG
(2) 2.0C 3-350kcmil, #1AWG
300
270
600
(2) 1.5C 3-#4/0AWG, #3AWG
(2) 2.0C 3-300kcmil, #1AWG
400
360
480
(2) 2.5C, 3-500kcmil, #1/0AWG
(2) 2.5C 3-750kcmil, #3/0AWG
400
360
575
(2) 2.5C 3-350kcmil, #2AWG
(2) 2.5C 3-500kcmil, #1/0AWG
400
360
600
(2) 2.5C 3-350kcmil, #2AWG
(2) 2.5C 3-500kcmil, #1/0AWG
Bypass Input
UPS Rating
kVA
kW
Voltage
(VAC)
250
225
250
(# of conduits); size of conduits; # -size of phase cables per conduit;
#-size of neutral cables per conduit; size of cable for ground per conduit
Copper Conductors
Aluminum Conductors
480
(2) 2.5C 3-250kcmil, 2-#4/0AWG, #3AWG
(2) 2.5C 3-350kcmil, 2-#250kcmil, #1AWG
225
575
(2) 2C 3-#4/0AWG, 2-#2/0AWG, #4AWG
(2) 2.0C 3-250kcmil, 2-#4/0AWG, #2AWG
250
225
600
(2) 2C 3-#4/0AWG, 2-#2/0AWG, #4AWG
(2) 2.0C 3-250kcmil, 2-#4/0AWG, #2AWG
300
270
480
(2) 2.5C 3-350kcmil, 2-#4/0AWG, #3AWG
(2) 2.5C 3-500kcmil, 2-300kcmil, #1AWG
300
270
575
(2) 2.5C 3-250kcmil, 2-#4/0AWG, #3AWG
(2) 2.5C 3-350kcmil, 2-250kcmil, #1AWG
300
270
600
(2) 2C 3-#4/0AWG, 2-#4/0AWG, #4AWG
(2) 2.5C 3-300kcmil, 2-250kcmil, #2AWG
400
360
480
(3) 3.5C, 3-600kcmil, 2-500kcmil, #1/0AWG
(2) 3.5C 3-750kcmil, 2-500kcmil, #1/0AWG
400
360
575
(2) 2.5C 3-#4/0AWG, 2-#4/0AWG, #2AWG
(2) 3C 3-300kcmil, 2-300kcmil, #1/0AWG
400
360
600
(2) 2.5C 3-#4/0AWG, 2-#4/0AWG, #2AWG
(2) 3C 3-300kcmil, 2-300kcmil, #1/0AWG
Output
UPS Rating
kVA
kW
Voltage
(VAC)
250
225
250
(# of conduits); size of conduits; # -size of phase cables per conduit;
#-size of neutral cables per conduit; size of cable for ground per conduit
Copper Conductors
Aluminum Conductors
480
(2) 2.5C 2-250kcmil, 2-#4/0AWG, #3AWG
(2) 2.5C 3-350kcmil, 2-#250kcmil, #1AWG
225
575
(2) 2C 3-#4/0AWG, 2-#2/0AWG, #4AWG
(2) 2.0C 3-250kcmil, 2-#4/0AWG, #2AWG
250
225
600
(2) 2C 3-#4/0AWG, 2-#2/0AWG, #4AWG
(2) 2.0C 3-250kcmil, 2-#4/0AWG, #2AWG
300
270
480
(2) 2.5C 3-350kcmil, 2-#4/0AWG, #3AWG
(2) 2.5C 3-500kcmil, 2-300kcmil, #1AWG
300
270
575
(2) 2.5C 3-250kcmil, 2-#4/0AWG, #3AWG
(2) 2.5C 3-350kcmil, 2-250kcmil, #1AWG
300
270
600
(2) 2C 3-#4/0AWG, 2-#4/0AWG, #4AWG
(2) 2.5C 3-300kcmil, 2-250kcmil, #2AWG
400
360
480
(3) 3.5C, 3-600kcmil, 2-500kcmil, #1/0AWG
(2) 3.5C 3-750kcmil, 2-500kcmil, #1/0AWG
400
360
575
(2) 2.5C 3-#4/0AWG, 2-#4/0AWG, #2AWG
(2) 3C 3-300kcmil, 2-300kcmil, #1/0AWG
400
360
600
(2) 2.5C 3-#4/0AWG, 2-#4/0AWG, #2AWG
(2) 3C 3-300kcmil, 2-300kcmil, #1/0AWG
Battery
UPS Rating
(# of conduits); size of conduits; # -size of phase cables per conduit; size of cable for ground
per conduit
kVA
kW
Copper Conductors
Aluminum Conductors
250
225
(2) 2C 2-600kcmil, #1/0AWG
(2) 2.5C 2-750kcmil, #3/0AWG
300
270
(2) 2.5C 2-750kcmil, #1/0AWG
(3) 2.0C 2-500kcmil, #3/0AWG
400
360
(3) 2C, 2-500kcmil, #2/0AWG
(3) 2.0C 2-600kcmil, #4/0AWG
45
Liebert® NXL™
Specifications
Table 15
Recommended conduit and cable sizes
Bonding
UPS Rating
Main Bonding Jumper/Grounding Electrode Conductor
kVA
kW
Copper Conductors
Aluminum Conductors
250
225
(1) #1/0AWG/ (1) #1/0AWG
(1) #1/0AWG/ (1) #1/0AWG
300
270
(1) #2/0AWG/ (1) #2/0AWG
(1) #2/0AWG/ (1) #2/0AWG
400
360
(1) #2/0AWG/ (1) #2/0AWG
(1) #2/0AWG/ (1) #2/0AWG
1. Recommended cable sizes are 167°F (75°C) (THW) wire at 86°F (30°C) ambient. Unless otherwise noted, use copper or aluminum
conductors suitable for at least 75°C.
2. For continuous operations not at 86°F (30°C), recommend that the site planner choose the appropriate cable type based on the
particular installation requirements.
3. Conduit size is based on FMC type conduit with two neutral conductors rated at 200% of phase.
Liebert® NXL™
46
Time, seconds
47
0
500
1000
1500
2000
1500
3000
3500
4000
4500
5000
5000
Continuous
100
110
3748
1363
120
937
600
130
394
250
150
60
40
Load, Percent
140
159 100
160
25
15
6
4
180
Time, seconds
170
10
2
190
1
0.5
200
Specifications
Figure 34 Inverter overload data
Liebert® NXL™
Liebert® NXL™
48
Continuous
110
120
3000
600
130
394
110% Load - 15,000 Seconds
0
100
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
250
140
159
150
60
40
25
160
Load, Percent
100
15
6
180
4
2
Time, Seconds
170
10
190
1
0.5
200
Specifications
Figure 35 Bypass overload data
Time, Seconds
Specifications
Table 16
Recommended lug sizes
Cable Size
T&B Copper
One Hole
T&B Copper
Two Hole
T&B Aluminum
One Hole
T&B Aluminum
Two Hole
#8AWG
54930BE
54850BE
60104-TB
—
#6AWG
54905BE
256-30695-868
60109-TB
—
#4AWG
54906BE
256-30695-733
60114-TB
—
#2-3AWG
54942BE
54811BE
60120
—
#1AWG
54947BE
54857BE
60126
—
#1/0AWG
54950BE
256-30695-593
60132
—
#2/0AWG
54951BE
54862BE
60138
60238
#3/0AWG
54965BE
54864BE
60144
60244
#4/0AWG
54970BE
54866BE
60150
60250
250kcmil
54913BE
54868BE
60156
60256
300kcmil
54914BE
54870BE
60162
60262
350kcmil
54915BE
54872BE
60165
60267
400kcmil
54916BE
54874BE
60168
60269
500kcmil
54918BE
54876BE
60171
60273
600kcmil
54920BE
54878BE
60176
60275
750kcmil
54922BE
54880BE
60178
60277
Table 17
Recommended torque values
Grade 5 Steel – Unified Thread System Torque Units - lbf.*in.
Fastener
Finish =>
Size
1/4
5/16
3/8
7/16
1/2
9/16
Threads/
Inch, Tpi
Plain Steel
No Washer/
Flat Washer
Class 8.8 Steel – Metric Thread System Torque Units - N*m
Fastener
Finish =>
Zinc Plating
Lock
Washer
No Washer/
Flat Washer
Lock
Thread
Washer Size Pitch Tp
20
101
—
91
—
28
116
—
104
—
18
209
224
188
203
24
231
246
208
223
16
370
392
333
355
24
420
442
378
400
14
593
—
534
—
20
662
—
596
—
13
904
934
814
844
20
1,020
1,050
918
948
12
1,305
—
1,175
—
18
1,456
—
1,310
—
M5
M6
M8
M10
M12
M14
49
Plain Steel
No Washer/
Flat Washer
Zinc Plating
Lock
Washer
No Washer/
Flat Washer
Lock
Washer
0.8
6.1
—
5.5
—
0.5
6.9
—
6.2
—
1
10
—
9
—
0.75
11
—
10
—
1.25
25
—
23
—
1
27
—
24
—
1.5
50
64
45
59
1.25
53
67
47
61
1.75
87
128
78
119
1.25
95
136
86
127
2
139
—
125
—
1.5
151
—
136
—
Liebert® NXL™
Technical Support / Service
Web Site
www.liebert.com
Monitoring
liebert.monitoring@emerson.com
800-222-5877
Outside North America: +00800 1155 4499
Single-Phase UPS & Server Cabinets
liebert.upstech@emerson.com
800-222-5877
Outside North America: +00800 1155 4499
Three-Phase UPS & Power Systems
800-543-2378
Outside North America: 614-841-6598
Environmental Systems
800-543-2778
Outside the United States: 614-888-0246
Locations
While every precaution has been taken to ensure the accuracy
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.
© 2013 Liebert Corporation
All rights reserved throughout the world. Specifications subject to change
without notice.
® Liebert is a registered trademark of Liebert Corporation.
All names referred to are trademarks
or registered trademarks of their respective owners.
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