APC Symmetra MW Installation guide
Symmetra MW UPS
800 kW
400 V
Installation
Guide
Contents
Safety ......................................................................1
IMPORTANT SAFETY INSTRUCTIONS
- SAVE THESE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Symbols used in this guide . . . . . . . . . . . . . . . . . . . . . . . . . 1
Installation safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
System Overview......................................................3
UPS Sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Serial number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Inverter Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Control Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Input/Output Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Configuration 1 (Inverter Section placed to the left) . . . . . . . . 4
Configuration 2 (Inverter Section placed to the right) . . . . . . . 5
External Bypass Static Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Serial number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical Installation ................................................7
Typical UPS Wiring Principle . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Power wiring overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
External disconnection switches . . . . . . . . . . . . . . . . . . . . . 8
Input/Output wiring precautions . . . . . . . . . . . . . . . . . . . . . 8
Top Cable Entry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Preparing for top cable entry (Default) . . . . . . . . . . . . . . . . . 9
Battery cable connections (top cable entry) . . . . . . . . . . . . . 10
PE and AC cable connections (top cable entry) . . . . . . . . . . . 12
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
i
Bottom Cable Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Preparing for bottom cable entry . . . . . . . . . . . . . . . . . . . . 13
Battery cable connection (bottom cable entry) . . . . . . . . . . . 15
PE and AC cable connections (bottom cable entry) . . . . . . . . 17
External Bypass Static Switch Wiring . . . . . . . . . . . . . . . . . . . . 18
Top cable entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Bottom cable entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Communication cable overview . . . . . . . . . . . . . . . . . . . . . . . . 21
Relay Board (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Location of optional Relay Board . . . . . . . . . . . . . . . . . . . . 22
Communication cables with optional Relay Board
. . . . . . . . 23
Relay Board functions . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Specifications ........................................................ 27
Low-Impedance/High-Impedance Earthing . . . . . . . . . . . . . . . . 27
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
AC Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
DC Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
AC Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
AC Input External Bypass SSW . . . . . . . . . . . . . . . . . . . . . 29
Heat dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Torque specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Required Breaker Settings (400 V Systems) . . . . . . . . . . . . . . . 31
Input and upstream breakers — minimum settings . . . . . . . . 31
Output and downstream breakers -— minimum settings . . . . 31
Appendix .............................................................. 33
System and Protective Earthing . . . . . . . . . . . . . . . . . . . . . . . . 33
TN Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Reference to IEC 60364-4-41 413.1.3 . . . . . . . . . . . . . . . . . 34
Reference to IEC 60364-5-54 546.2.3 . . . . . . . . . . . . . . . . . 34
Additional requirements for generating sets
(IEC 60364-5-55 551.4.2) . . . . . . . . . . . . . . . . . . . . . . . . . 35
Protective devices in TN systems . . . . . . . . . . . . . . . . . . . . 35
ii
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
TT Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Reference to IEC 60364-4-41 413.1.4 . . . . . . . . . . . . . . . . . 37
Protective devices in TT systems . . . . . . . . . . . . . . . . . . . . . 37
IT Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Reference to IEC 60364-4-41 413.1.5 . . . . . . . . . . . . . . . . . 39
Protective devices in IT systems . . . . . . . . . . . . . . . . . . . . . 40
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
iii
Safety
IMPORTANT SAFETY INSTRUCTIONS
- SAVE THESE INSTRUCTIONS
This guide contains important instructions for 800K800H that should be followed when handling the
UPS, External Bypass Static Switch, Battery Enclosures, and Batteries.
Symbols used in this guide
WARNING!
Indicates an electrical hazard, which, if not avoided, could result in injury or death.
CAUTION!
Indicates a hazard, which, if not avoided, could result in injury or death.
Indicates important information.
Note
Indicates that more information is available on this subject in a different section of this
manual.
Indicates that more information is available on the same subject in a different manual.
See also
Main Protective Earthing Terminal symbol.
Ground symbol.
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
1
Safety: IMPORTANT SAFETY INSTRUCTIONS - SAVE THESE INSTRUCTIONS
Installation safety
EPO
Press the optional EPO (Emergency Power Off) button to switch off all AC and DC
power supply to connected equipment in the room and to cut off the load supply. The
EPO is typically located on a wall in the room in which the UPS is installed. See
“Communication cable overview” section for information on how to wire the UPS to
the EPO.
WARNING!
Before installation work is carried out, check and test that all AC and DC power
source breakers are in open position.
WARNING!
Only personnel trained in the construction and operation of the equipment, and the
electrical and mechanical hazards involved, may install or remove system
components.
WARNING!
Do not use High Voltage Testing Equipment. This equipement will destroy the
electronic circuits in the unit.
CAUTION!
The system is equipped with an optional auto-start function, enabling the system to start
without any warning when power is applied.
CAUTION!
All wiring to be in accordance with applicable national and/or local electrical wiring
rules.
This unit contains components that are sensitive to electrostatic discharge (ESD).
Follow proper ESD procedures to avoid severe damage to electronic components.
2
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
System Overview
UPS Sections
Serial number
The serial number is stated on the type label behind the finishing panel above the display unit.
Remove finishing panel to see serial number.
Inverter Section
The Inverter Section regulates the UPS output and operates from battery power in the event of utility
input loss.
Control Section
The Control Section controls and monitors the UPS and the Mains Static Switch Module
(incorporated in the Control Section).
Input/Output Section
The Input/Output Section provides electrical connection of input and output.
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
3
Configurations
The UPS system can be configured in two ways. The Inverter Section can be placed either to the left
or to the right of the Control Section. The two configurations are shown below.
Configuration 1 (Inverter Section placed to the left)
OFF
EMO
2032 mm
ON
1067 mm
Inverter Section
Control Section
Input/Output Section
Width:
1690 mm
Weight:
Without Power Modules: 2456 kg
With Power Modules: 3130 kg
Width:
1012 mm
Weight:
610 kg
Width:
1014 mm
Weight:
480 kg
Total width of UPS sections:
3716 mm
4
Total weight of UPS sections:
4220 kg
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
System Overview: Configurations
2032 mm
Configuration 2 (Inverter Section placed to the right)
1067 mm
Input/Output Section
Control Section
Inverter Section
Width:
1014 mm
Width:
1012 mm
Width:
1690 mm
Weight:
480 kg
Weight:
610 kg
Weight:
Without Power Modules: 2456 kg
With Power Modules: 3130 kg
Total width of UPS sections:
3716 mm
Total weight of UPS sections:
4220 kg
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
5
External Bypass Static Switch
The External Bypass Static Switch (External Bypass SSW) transfers the load (manually or
automatically) from the UPS to an alternate source without interrupting the supply to the load.
~
~
2032 mm
1067mm
External Bypass Static Switch
Width:
1016 mm
Weight:
1 MW: 460 kg
Serial number
The serial number is stated on the type label behind the finishing panel above the display unit.
Remove finishing panel to see serial number.
6
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
MAINS
9.
13.
14.
6. UPS AND STATIC BYPASS WITHSTAND RATING, Icw = 200 KA
7.
SEE THE INSTALLATION GUIDE FOR THE BREAKER SETTINGS OF Q1, Q3, Q4 AND Q5.
11.
12.
4. ALL AC POWER CABLING IS L1,L2,L3,N,PE.
5. UPS INPUT AND OUTPUT CONDUCTORS MUST BE IN SEPARATE CABLE RUNS.
WITH 24VOLT DC UNDER VOLTAGE RELEASE (UVR) AND 2NO/2NC AUXILIARY CONTACTS.
3. Q7, Q8 DC RATED THERMAL MAGNETIC TRIP MOLDED CASE CIRCUIT BREAKER.
10.
8.
- Q6 WITH 2NO/2NC AUXILIARY CONTACTS.
2. Q1
6
6
Battery Breaker Box 2
Battery Breaker Box 1
Batteries 2
Batteries 1
INSTALLATION MUST COMPLY WITH NATIONAL AND LOCAL ELECTRICAL RULES.
= CABLING PROVIDED BY OTHERS
DC CIRCUIT CABLE LENGTHS SHOULD BE EQUAL ON ALL MODULES
AC CIRCUIT CABLE LENGTHS (INPUT AND OUTPUT) SHOULD BE EQUAL ON ALL MODULES
POWER WIRING AND CONTROL WIRING MUST BE SEGREGATED.
SEE BATTERY INSTALLATION INFORMATION
DC CABLING SHOULD BE SEGREGATED FROM AC CABLING
External Bypass Static Switch
Symmetra MW
1. MAINS SOURCE 3X400/230V TN-S (PROVIDED BY OTHERS).
Maintenance Bypass Panel (MBP)
9
9
Electrical Installation
Typical UPS Wiring Principle
Power wiring overview
See separate guide on parallel operation for wiring overview in parallel systems.
See also
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
7
Electrical Installation: Typical UPS Wiring Principle
External disconnection switches
WARNING!
The UPS has no internal manual disconnect devices to switch off external AC (Q1
and Q5) and DC (Q7 and Q8) input power. Ensure that disconnection devices are
available as separate components for this installation.
Note
The installer must provide each external disconnection device for this UPS system with
labels displaying the following text:
“Isolate the Uninterruptible Power Supply (UPS) as instructed in the User Guide before
working on circuit.”
Input/Output wiring precautions
WARNING!
Only personnel trained in the construction and operation of the equipment, and the
electrical and mechanical hazards involved, may install or remove system
components.
WARNING!
Before installation work is carried out, check and test that all AC and DC power
source breakers are in open position.
WARNING!
Supply the UPS from a 3 × 400/230 V, L1, L2, L3, N, PE source or a high-impedance
grounded system.
CAUTION!
All wiring to be in accordance with applicable national and/or local electrical wiring
rules.
Use only copper conductors.
Note
8
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
Top Cable Entry
Preparing for top cable entry (Default)
Cable entry in Top Cover of Input/Output Section.

Top view
M6 Bolt
44.45 mm
DC
cable
entry
AC IN cable
entry
DC
cable
entry
44.45 mm
58 mm
AC OUT
cable entry

IN/OUT power cable (top entry)

BAT 1
BAT 2
Top view
AC IN
AC OUT
90
L3 IN
95
L3 OUT
91
L2 IN
94
L2 OUT
92
L1 IN
93
L1 OUT
L1 IN
L2 IN
92
93
91
94
90
95
L1 OUT
L2 OUT
L3 IN
L3 OUT
N
N
 Loosen the 8 bolts in both cable entry covers (4 bolts in each cover). Drill holes for the
grommets in areas shown. Install the grommets and re-fit the covers.
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
9
Electrical Installation: Top Cable Entry
 Install cable lugs on busbars. Use M12 bolts. Feed cables through the top grommets.
 Connect L1, L2 and L3 to busbars where indicated.
Battery cable connections (top cable entry)
WARNING!
Make sure that the battery breakers are open (OFF) prior to running the cables.
CAUTION!
Refer to the battery manufacturer’s installation manual.
CAUTION!
The minimum DC voltage rating of the battery supply over-current protective device is
500 V.
Over-current protection for the battery circuit is required by national wiring rules.
Note
10
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
Electrical Installation: Top Cable Entry
Top view of Input/Output Section
M6 Bolt
44.45 mm
44.45 mm
58 mm
DC
cable
entry
AC IN
cable entry
DC
cable
entry
AC OUT
cable entry
IN/OUT power cable (top entry)
Battery 1
(DC1 +/-)
Battery 2
(DC2 +/-)


BAT1BAT1-
BAT2+
BAT2+
L1 In
L1 Out
L2 In
L2 Out
L3 In
L3 Out

BAT1+
BAT2—
N
N
BAT1+
BAT2-
Input/Output Section
 Feed the battery cables through the grommets
 Connect cables from battery system.
 Connect cables from battery system.
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
11
Electrical Installation: Top Cable Entry
PE and AC cable connections (top cable entry)
Bonding
Jumper (TNsystems) to
Input Neutral
Bar
Battery 2
PE
Battery 1


Protective Earthing
conductors (red) for
Battery 2 & AC OUT
Earthing conductor
connected to
suitable earth
electrode TNsystems
Protective Earthing
conductors (red) for
Battery 1 & AC IN
N
Output circuit
grounding bar.
N
44.45 mm
44.45 mm
58 mm
 Feed the AC and PE cables through the top of Input/Output Section.
 Connect cables.
12
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
Bottom Cable Entry
Preparing for bottom cable entry
Cable entry in bottom cover of Input/Output Section

Top view
DC
cable
entry
AC IN
cable entry
M6 Bolt
44.45 mm
DC
cable
entry
44.45 mm
58 mm
AC OUT
cable entry
Top view
Front view
BAT 1
BAT 2
M14
M14
M14
M10

M10
AC IN
90 L3 IN
L2 IN
M10
M10
92 L1 IN

M14
AC OUT
M10
95 L3 OUT
M10

L2 OUT
93 L1 OUT
M10
L1 IN
L2 IN
L3 IN
BAT 1
90
95
L1 OUT
91
94
L2 OUT
92
93
L3 OUT
BAT 2
N
N
Top view
AC IN
90 L3 IN
AC OUT
95 L3 OUT
L2 IN
L2 OUT
92 L1 IN
93 L1 OUT
IN/OUT power cable (bottom entry).
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
13
Electrical Installation: Bottom Cable Entry
 Preparation for bottom cable entry
a. Loosen bolts of both cable entry covers and remove.
b. Drill holes for grommets for AC, DC, and Output circuit grounding electrode cable in areas
shown.
No drilling or cutting should take place inside the UPS.
Note
c. Install grommets.
d. Remount covers.
 Interchange of AC IN busbars for bottom entry
a. Remove nuts from M14 bolts at busbars 90 and 92.
b. Remove bolt, washer and fuse.
c. Remove bolts from M10 at busbars 90 and 92.
d. Remove busbars 90 and 92 at AC IN.
e. Move the two front isolators in the topmost busbar position two steps to the front.
f. Move the two front isolators in the lowest busbar position two steps to the rear.
g. Install busbar 90 in original position of busbar 92.
h. Install busbar 92 in original position of busbar 90.
i. Reattach M14 bolts at busbars 90 and 92.
j. Install cable lugs on busbars using M12 bolts.
 Interchange of AC OUT busbars for bottom entry
a. Remove nuts from M14 bolts at busbars 93 and 95.
b. Remove bolt, washer and fuse.
c. Remove bolts from M10 at busbars 93 and 95.
d. Remove busbars 93 and 95 at AC OUT.
e. Move the two front isolators in the topmost busbar position two steps to the front.
f. Move the two front isolators in the lowest busbar position two steps to the rear.
g. Install busbar 93 in original position of busbar 95.
h. Install busbar 95 in original position of busbar 93.
i. Reattach M14 bolts at busbars 93 and 95.
j. Install cable lugs on busbars using M12 bolts.
 Moving busbar for grounding
a. Move busbar for grounding from upper right corner to lower left corner as illustrated.
14
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
Electrical Installation: Bottom Cable Entry
Battery cable connection (bottom cable entry)
WARNING!
Make sure that the battery breakers are open (OFF) prior to running the cables.
CAUTION!
Refer to the battery manufacturer’s installation manual.
CAUTION!
The minimum DC voltage rating of the battery supply over-current protective device is
500 V.
Over-current protection for the battery circuit is required by national wiring rules.
Note
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
15
Electrical Installation: Bottom Cable Entry
Bottom view of Input/Output Section
M6 Bolt
44.45 mm
44.45 mm
58 mm
DC
cable
entry
AC IN
cable entry
DC
cable
entry
AC OUT
cable entry

BAT1-
L1 In
L1 Out
L2 In
L2 Out
L3 In
BAT2+
BAT1-
BAT 2+

L3 Out
BAT1+
BAT2—
BAT1+
N
N
BAT2-
Battery 1
(DC1 +/-)
Battery 2
(DC2 +/-)
IN/OUT power cable (bottom entry)
 Connect cables from battery system.
 Connect cables from battery system.
16
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
Electrical Installation: Bottom Cable Entry
PE and AC cable connections (bottom cable entry)
Output circuit
grounding bar
Bonding
Jumber (TNsystems) to
Input Neutral
Bar
Earthing conductor
connected to suitable
earth electrode TNsystems
Protective Earthing
Conductors for Battery 2 &
AC OUT
Protective Earthing Conductors
for Battery 1 & AC IN
Output circuit
grounding bar
N
N
PE
Battery 1
Battery 2


44.45 mm
44.45 mm
58 mm
 Feed the AC and PE cables through the bottom of Input/Output Section.
 Connect cables.
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
17
External Bypass Static Switch Wiring
WARNING!
Before installation work is carried out, check and test that all AC and DC power
source breakers are in open position.
WARNING!
Use only manual reset protection as input over-current protection.
WARNING!
Over-current protection required by national wiring rules.
WARNING!
The UPS has no internal manual disconnect devices to switch off external AC (Q1
and Q5) and DC (Q7 and Q8) input power. Ensure that disconnection devices are
available as separate components for this installation.
CAUTION!
The External Bypass Static Switch is not provided with built-in backfeed protection.
Use suitable breakers with a minimum of 0.8 in/20 mm air gap and trip function. The
breaker is controlled from the External Bypass SSW and will be tripped in case of
backfeed.
Note
The installer must provide each external disconnection device for this UPS system with
labels displaying the following text:
“Isolate the Uninterruptible Power Supply (UPS) as instructed in the User Guide before
working on circuit.”
The installation of the External Bypass Static Switch must comply with local and national
regulations.
Note
Run matched set of phase cables in the same cable run(s).
Do not separate phases into different cable runs.
Note
Use only copper conductors.
Note
Electrical Installation: External Bypass Static Switch Wiring
Top cable entry
 Top view of AC IN & OUT cable
 Top view of top cable entry
L3 OUT
L3 IN
L2 OUT
L2 IN
L1 OUT
L1 IN
connections
PE


X017
X012
X008A

X014B
X013
X014A
X008B
X011
X405
X010
Normal
Normal
X007
X021
UPS Summary
Port for communication cables
X022
~
~

L1 IN
L2 IN
L1 OUT

L2 OUT


L3 IN
L3 OUT

Ext. Bypass SSW
44.45 mm
44.45 mm
58 mm
 Loosen the 8 screws to remove top covers. Drill holes for grommets. Re-fit the covers and
install the grommets.
No drilling or cutting should take place over the top of the External Bypass SSW.
Note
 Feed the cables through the grommets. Connect cables at cable connection points.
 Connect grounding electrode conductor to busbar locations.
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
19
Electrical Installation: External Bypass Static Switch Wiring
Bottom cable entry
Ext. Bypass SSW
 Top view of AC IN & OUT
 Top view of bottom cable entry
bottom cable connections
X017
X012
X008A
X014B
X013
X014A
X008B
X011
X405
X010
X007
X021
Normal
Normal
UPS Summary

L1 IN

L2 IN
L1 OUT
Communication cable Port


L3 IN
L2 OUT

L3 OUT
L3 OUT
L3 IN
L2 OUT
L2 IN
~
L1 OUT
~
L1 IN
X022


PE
44.45 mm
44.45 mm
58 mm
 Loosen the 8 screws to remove bottom covers. Drill holes for the grommets. Re-fit the covers
and install the grommets.
No drilling or cutting should take place inside the External Bypass SSW.
Note
 Feed the cables through the grommets. Connect cables at cable connection points.
 Connect grounding electrode conductor to busbar locations.
20
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
Communication cable overview
Terminator
0M-1878
External Bypass Static Switch
Maintenance Bypass Panel
Relay output
X134A
1
MBP
Breakers
X173
1
4
3
2 1
Q
1
X127A
3
1
+
Note 3
Q
2
X126A
+
C1
6 5
2
1
X129
C2
0P4533
7
Q
3
X127B
-
MBP CAN I/O board 2
Q
4
X126B
Note 1
X129
8
EMO (Display)
Q
5
1
X128
X174
Earth fault sensor
X128
12 11 10 9
Q
6
X131
12 3 4
X170
X175
Norm.op
4
2
1
2
X130
X134B
X177
2
2
2
1
2
1
1
X178
X177
2
Connection plane
0P0957
X134A
2
2
1
3
+
4 5
6
- +
- +
H3
Lamps
X172
8 9 10
7
H4
- +
H5
11
1
12
+
-
X176
3 4
2
-
+
5
-
Q5
H6
6
+
-
Q6
24VDC
Shunt trip for
back feed
protection
+
External Lamp
supply VDC or V DC
- Max. 250VAC 5A
Terminator
0M-1878
UPS
Note 1
6
7
8
X172
Lamps
9
11
10
12
C2
12 3 4
X170
+
C1
1
6
5
X173
MBP
Breakers
X176
3 4
2
Q1
-
1
EMO (Display)
+
+
1
2
Backfeed protection
Earth fault sensor
X174
1
X127A
Norm.op
X175
2
1
24VDC
Shunt trip
Relay output
Maintenance Bypass Panel
H8
H7
Note 2
Q8
Q7
EPO out
X185
1 2
2
Note 3
X129
1
1
2
2
1
X128
9 10 11 12
X129
2
+
8
X128
+
MBP CAN I/O board1
0P4533
7
X130
6
X127B
1
External
EPO
2
placed on
wall
4 5
X126B
X177
2 3
X126A
5
1
X131
X133A
4
Q2
2
3
3
1
2
2
2
1
1
X178
Connection plane
0P0957
EPO out X177
X134A
4
X134B
X134A
-
+
4
+
4
1
2 3
X183
4
Battery CAN I/O board
ID 0
X185
0P4512
+
+
UVR
Q8
UVR
Q7
Temp sensor
NTC
+ Temp sensor
NTC
+
Fuse4
Fuse1
X186
1 2 3 4 5 6 7 8
Fuse3
X133A
X133B
X184
2 3
3
1
X182
X181
1 2 3 4
2
Fuse2
1
2 1 2 34
X180
1
Note 1: Contact APC Application Team for correct
sizing.
Note 2: H7, H8 = 5V LED
Note 3: Q2, Q4 and Q6 are optional. If Q2 is not
present pins 3 and 4 must be shorted on both boards. If
Q4 is not present pins 7 and 8 must be shorted on both
boards. If Q6 is not present pins 11 and 12 must be
shorted on both boards.
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
21
Relay Board (Optional)
NC 3
1
2
3
1
2 3
1
2
3
1 2
3
1
2 3
1
2
3
1
2
3
1
2 3
Location of optional Relay Board
22
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
Electrical Installation: Relay Board (Optional)
Communication cables with optional Relay Board
External Lamp
supply VAC or V DC
Max. 250VAC 5A
24VDC
Shunt trip
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
23
Electrical Installation: Relay Board (Optional)
Relay Board functions
The Relay Board informs the user of the operation mode, status, and alarm conditionsand has 8 ports
on the input side and 16 output terminals.
Use Normally Closed (NC) contacts for Fail safe Mode and Normally Open (NO) for
Active on.
Note
24
Relay
ID
Name
Events that will trigger the alarm
Mode
Comment
K1
Common Alarm
• Any of the functions below, except relays
K8, K9, K10, K11;
• Inverter section fault;
• Main PSU fault;
• System locked in operation mode;
• Internal memory fault;
• Internal communication fault.
Fail safe
Warning
K2
Battery voltage out of
tolerance
• DC voltage is too high (shut down);
• DC voltage is under warning level;
• DC voltage is low (shut down).
Fail safe
Warning
K3
Mains out of tolerance
• Mains voltage RMS value is out of
tolerance;
• Mains waveform not accepted (fast
detector);
• Mains frequency is out of tolerance.
Fail safe
Warning
K4
Bypass out of tolerance
• Bypass voltage RMS value is out of
tolerance;
• Bypass waveform not accepted (fast
detector);
• Bypass frequency is out of tolerance.
Fail safe
Warning
K5
Battery condition fault
• Battery monitor has detected a weak
battery;
• Battery monitor has detected a defective
battery.
Fail safe
Fault
K6
Battery disconnected
• Battery breaker tripped/open.
Fail safe
Fault
K7
System overload
• Output load exceeded 100%;
• Delta Inverter current limiter is active;
• Main Inverter current limiter is active.
Fail safe
Fault
K8
Output out of tolerance
• Output voltage RMS value is out of
tolerance;
• Output waveform not accepted (fast
detector);
• Output frequency is out of tolerance.
Fail safe
Fault
K9
Normal operation
• UPS is running in normal operation.
Active on
Opr. mode
K10
Battery operation
• UPS is running in battery operation.
Active on
Opr. mode
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
Electrical Installation: Relay Board (Optional)
Relay
ID
Name
Events that will trigger the alarm
Mode
Comment
K11
Bypass operation
• UPS is running in normal operation/
bypass operation according to AS400/
Novell.
Active on
Opr. mode
K12
Maintenance bypass ON
• The maintenance bypass switch is active.
Active on
Opr. mode
K13
Stand-by operation
• UPS is in stand-by operation.
Active on
Opr. mode
K14
Boost charge operation
• UPS is boost charging the batteries.
Active on
Opr. mode
K15
Fan fault
• Blocked or faulty fan.
Fail safe
Fault
K16
High equipment
temperature or inverter
fuse blown
• Static Switch temperature is high;
• Main Inverter failure (high temperature
or blown fuse);
• Delta Inverter temperature is high;
• Magnetics temperature is high;
• Isolation Transformer temperature is high
(optional);
• Battery temperature is high.
Fail safe
Warning
IN1
Generator active
• System on generator
System is
running on
generator.
Battery
charging is
derated.
IN2
Battery room ventilation
fault
• Battery room ventilation
Ventilation
fault in
battery
room.
Battery
charging is
off.
IN3 IN8
Reserved for future use
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
25
Specifications
Low-Impedance/High-Impedance Earthing
The Symmetra® MW is easily integrated into either a solid grounded system, or a high-impedance
grounded system.
In a solid grounded system, the neutral power source (mains, generator, or UPS) is solidly grounded.
In the event of a down-stream ground fault, the fault current will have a path back to the source, and
the over-current device feeding the faulted part of the installation will trip and isolate the fault.
In a high-impedance grounded system, the source is grounded with an impedance (grounding
resistor). In the event of a down-stream fault, the fault current will be limited by the impedance of the
grounding resistor. The value of a high-impedance system is its ability to maintain operation with a
given system fault to ground, i.e. the over-current device will only trip at line-to-line faults or double
ground faults. For a high-impedance system to provide enhanced power system reliability and
availability, a ground-fault monitoring/alarm system is required.
Grounding electrode conductor to be supplied by the customer.
Note
For more information refer to “Appendix” in Installation Guide.
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
27
Electrical Specifications
WARNING!
Supply the UPS from a dedicated, 3 × 400/230 V, L1, L2, L3, N, PE source or a
high-impedance grounded system.
CAUTION!
Ensure clockwise phase rotation (L1, L2, L3) of input voltages.
CAUTION!
AC and DC disconnect switches and over-current protection must be included in the
installation.
All wiring must comply with all applicable national and/or local electrical codes.
Note
Max. prospective RMS short-circuit current on input terminals: 200 kA
Max. prospective RMS short-circuit current on DC terminals: 50 kA
Note
AC Input
AC Input
Input rating
800 kW/kVA
Power Factor
1
Input Voltage
380 V
Input Frequency
50 Hz
Nominal input current (note 1)
1132 A
Input Current Limitation (note 2)
1422 A
Input Voltage
400 V
Input Frequency
50 Hz
Nominal input current (note 1)
1203 A
Input Current Limitation (note 2)
1466 A
Input Voltage
28
415 V
Input Frequency
50 Hz
Nominal input current (note 1)
1159 A
Input Current Limitation (note 2)
1447 A
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
Specifications: Electrical Specifications
DC Input
DC Input
Nominal Voltage (note 3)
2 x 384 V
INom Discharge (note 4)
1085 A
IMax Discharge (note 5)
1276 A
CAUTION!
The minimum DC voltage rating of the battery supply over-current protective device is
500 V.
AC Output
AC Output
Voltage
380 V
- Current Nom (note 8)
1094 A
- Max (note 7)
1311 A
Voltage
400 V
- Current Nom
1155 A
- Max (note 7)
1444 A
Voltage
415 V
- Current Nom
1113 A
- Max (note 7)
1391 A
AC Input External Bypass SSW
The External Bypass SSW is rated to a thermal overload of 25%.
AC Input External Bypass SSW
External Bypass SSW Max Input Current (100% load)
380 V
1094 A
400 V
1155 A
415 V
1113 A
Heat dissipation
24.74 kW / 84.4 kBTU/hr (note 6)
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
29
Specifications: Electrical Specifications
Notes
1. Nominal (Nom): Input current based on rated load, nominal input voltage and fully charged
batteries.
2. Current limitation is maximum allowed via electronic current limiting and is based on full
battery recharge + nominal load and -10% input voltage.
3. Nominal battery voltage assumed to be 2.0 volts/cell (lead technology).
4. Nominal Battery Discharge current based on rated load, and nominal Battery voltage.
5. Maximum Battery Discharge current based on rated load at end of Discharge.
6. Heat dissipation calculated at rated load capacity.
7. This current is at 125% of rated load and is electronically current-limited to a maximum of 10
minutes. This value is only provided so the engineer can ensure that the selected AC output
circuit overcurrent device’s time-current characteristic will support this condition.
8. At 380 V, nominal output is reduced from 200 kW to 180 kW in each section.
Torque specifications
Torque specifications
30
Bolt Size M8
13.5 Nm
Bolt Size M10
30 Nm
Bolt Size M12
50 Nm
Bolt Size M14
75 Nm
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
Required Breaker Settings (400 V Systems)
Contact APC Application Team for Required Breaker Settings in 380 V and 415 V
systems.
Note
The Symmetra® MW is a fault-tolerant system capable of handling and surviving overloads and
internal/external faults. The overload performances and fault clearings are possible when the system
meets specified minimum requirements for breaker settings. The settings are specified in the tables
below, but some of them can also be found in the Electrical Specification section. The settings are all
minimum settings and may not result in a drop-out.
See separate guide on parallel operation for information on required breaker settings in
parallel systems.
See also
Input and upstream breakers — minimum settings
Q1, Q5, and any upstream breaker
Duration [S]
Current [A]
Total load [%]
Event/Operation
< 0.005
22 kA
--
Internal fault clearing
600
1466*
127
Overload on-line
∞
1203
100
On-line
∞
1270
110
On-line+ Max. Battery
charge
* Only applicable to Q1
Output and downstream breakers -— minimum settings
Q2, Q4, Q6, and any downstream breaker
Duration [S]
Current [A]
Total load [%]
Event/Operation
< 0.005
22 kA
--
Internal fault clearing.
Will end as upstream
60
2406*
200
Overload on-line
600
1504*
125
Overload on-line
∞
1155
100
On-line
* Only applciable to Q2 and Q4
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
31
Specifications: Required Breaker Settings (400 V Systems)
22 kA is the maximum peak let-through current (including safety factor) available during clearing of
an internal fault in a 200 kW section or a Power Module. During or after a controlled fault clearing,
none of the breakers are allowed to trip on the instantaneous trip setting below the specified value.
The maximum peak let through current is applicable to utility with prospective short-circuit currents
up to 200 kA.
Note
The instantaneous trip setting must not be derated even though the UPS system is derated
in system output power. The system size has no influence on the instantaneous trip
setting.
For derated or parallel systems, the APC Application Team provides the correct breaker
settings and breaker frame sizes.
Note
For upstream breakers not mentioned in the table, the APC Application Team provides
the correct breaker settings for on-line, overload, and trip currents.
Note
The following diagram shows a dual mains systems in which the upstream breakers are named Q.
Correct settings of upstream breaker settings are mandatory. The systems can also be configured as
single mains systems.
Dual Mains Single Installation
Q3
T1
Q
Q5
Q6
Q
Q1
Q2
T2
32
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
Q4
Appendix
System and Protective Earthing
The purpose of this appendix is to describe the system- and protective earthing principles of the
Symmetra® MW.
CAUTION!
All wiring to be in accordance with applicable national and/or local electrical wiring
rules.
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
33
TN Systems
Characteristics
TN systems have one point connected directly to ground. All exposed conductive parts must be
connected to that point by protective conductors.
Depending on the way the neutral and protective conductors are fed, there are three types of TN
systems:
• TN-S system: a separate protective conductor is used in the system
• TN-C-S system: the neutral and protective conductors are combined to one single conductor in
a part of the system
• TN-C system: the neutral and protective conductors are combined to one single conductor in the
whole system
Reference to IEC 60364-4-41 413.1.3
All exposed conductive parts of the installation must be connected to the earthed point of the power
system by protective conductors which must be earthed at or near to each relevant transformer or
generator.
Exposed conductive parts that are accessible at the same time must be connected to the same earthing
system, either individually, in groups or collectively.
Normally the earthed point of the power system is the neutral point. If a neutral point is not available
or accessible, a phase conductor must be earthed. The phase conductor must not serve as a PEN
conductor.
In fixed installations a single conductor may serve both as a protective conductor and a neutral
conductor (PEN conductor).
Reference to IEC 60364-5-54 546.2.3
If from any point in the installation the neutral and protective functions are provided by separate
conductors, it is inadmissible to connect these conductors to each other from that point. At the point
of separation, separate terminals or bars must be provided for the protective and neutral conductors.
The PEN conductor must be connected to the terminal or bar intended for the protective conductor.
If there are other effective earth connections, the protective conductors must be connected to such
points when it is possible. It may be necessary to earth at additional points to ensure that the
potentials of protective conductors remain as close as possible to that of earth in case of a fault.
34
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
Appendix: TN Systems
Additional requirements for generating sets (IEC 60364-5-55 551.4.2)
To be used when the generating set provides a switched alternative to the public supply.
Protection by automatic disconnection of supply must not rely on the connection to the earthed points
of the public supply system when the generator is operating as a switched alternative to a TN system.
A suitable earth electrode must be provided.
Protective devices in TN systems
The following protective devices are recognized in TN systems:
• Overcurrent protective devices
• Residual current protective devices (not to be used in TN-C systems)
SOURCE
L1
L1
L1
PEN
Residual Current Sense
When a residual current protective device is used in a TN-C-S system, a PEN conductor must not be
used on the load side. The connection of the protective conductor to the PEN conductor must be made
on the source side of the residual current protective device (see below illustration):
L1
L1
SOURCE
L1
N
PE
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
35
Appendix: TN Systems
The characteristics of protective devices and the circuit impedances shall be such that, if a fault of
negligible impedance occurs anywhere in the installation between a phase conductor and a protective
conductor or exposed conductive part, automatic disconnection of the supply will occur within 5
seconds (valid for distribution circuits), the following condition fulfilling this requirement:
Zs × Ia ≤ U0
In the condition:
Zs
is the impedance of the fault loop comprising the source, the live conductor up to the point of the
fault, and the protective conductor between the point of the fault and the source
Ia
is the current causing the automatic operation of the disconnecting protective device within a
conventional time not exceeding five seconds
U0
is the nominal AC RMS voltage to earth
If a fault occurs close to the UPS (before the power distribution) while the UPS system is in Battery
Operation and Bypass is unavailable, the available power is unable to activate the protective device.
In that situation the Inverter will shut down in five seconds (IEC 60364-4-41 413.1.3.5 norm). If a
residual current protective device is used, this device will disconnect the supply.
The four diagrams show the Symmetra MW installed in four different TN systems:
• Earthing arrangements and protective conductors - Symmetra® MW in “TN-S installation”
• Earthing arrangements and protective conductors - Symmetra® MW in “TN-S installation”
(Legal in DK - special cases)
• Earthing arrangements and protective conductors - Symmetra® MW in “TN-C-S installation”
• Earthing arrangements and protective conductors - Symmetra® MW in “TN-C installation”
36
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
TT Systems
Characteristics
TT systems have one point connected directly to ground and all exposed conductive parts of the
installation must be connected to an earth electrode. This earth electrode is independent of the power
system earthed point.
Reference to IEC 60364-4-41 413.1.4
All exposed conductive parts that are protected collectively by the same protective device must be
connected to a common earth electrode together with the protective conductors. In installations where
several protective devices are utilized in series, the requirement applies separately to all exposed
conductive parts protected by each device.
The neutral point or, if a neutral point does not exist, a phase conductor of each generator station or
transformer station must be earthed.
Protective devices in TT systems
The following protective devices are recognized in TT systems:
• Overcurrent protective devices
• Residual current protective devices
Overcurrent protective devices are only applicable for protection against indirect contact in TT
systems where a low RA value exists (see specification below).
The condition RA × I a ≤ 50V must be fulfilled.
In the condition:
RA
is the sum of resistance of the earth electrode and the protective conductor for the exposed
conductive parts
Ia
is the current causing the automatic operation of the protective device.
When the protective device is a residual current protective device, Ia is the rated residual operating
current I ∆ n
For discrimination purposes, S-type residual current protective devices may be used in series with
general type residual current protective devices. To provide discrimination with S-type residual
current protective devices, an operating time not exceeding 1 second is permitted in distribution
circuits.
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
37
Appendix: TT Systems
When the protective device is an overcurrent protective device, it must be either:
• a device with inverse time characteristics and Ia must be the current causing automatic
operation within 5 seconds, or
• a device with an instantaneous tripping characteristic and Ia must be the minimum current
causing instantaneous tripping
The following diagram shows a Symmetra® MW installed in a TT system:
• Earthing arrangements and protective conductors - Symmetra® MW in “TT installation”
38
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
IT Systems
Characteristics
In IT systems the installation is insulated from earth or connected to earth through a sufficiently high
impedance. Exposed conductive parts are earthed individually, in groups, or collectively.
Reference to IEC 60364-4-41 413.1.5
In IT systems the installation must be insulated from earth or connected to earth through a sufficiently
high impedance. This connection must be made either at the neutral point of the system or at an
artificial neutral point. The latter may be connected directly to earth if the resulting zero-sequence
impedance is sufficiently high. In installations where no neutral point exists, a phase conductor can
be connected to earth through an impedance. In case of a single fault to an exposed conductive part or
to earth, the fault current will be low and disconnection will not be imperative.
Exposed conductive parts must be earthed individually, in groups or collectively and the condition
R A × I d ≤ 50V must be fulfilled.
In the condition:
RA
is the resistance of the earth electrode for exposed conductive parts
Id
is the fault current of the first fault of negligible impedance between a phase conductor and an
exposed conductive part. The Id value takes the leakage currents and the total earthing impedance
of the electrical installation into account
In systems where an IT system is used for continuity of supply, an insulation monitoring device must
be provided to indicate the occurrence of a first fault from a live part to the exposed conductive parts
or to the earth. It is recommended to eliminate a first fault as soon as possible.
Depending on whether all exposed conductive parts are interconnected by a protective conductor
(collectively earthed) or are earthed in groups or individually, after a first fault, the disconnection
conditions of the supply for a second fault must be as follows:
a. In installations where the exposed conductive parts are earthed in groups or individually, the
protection conditions for TT systems apply (see 413.1.4.1)
b. In installations where the exposed conductive parts interconnected by a protective conductor
collectively earthed, the conditions for TN systems apply
In installations where the neutral is not distributed, the following conditions must be fulfilled:
3×U
Zs ≡ -------------------02 × Ia
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
39
Appendix: IT Systems
In installations where the neutral is distributed, the following conditions must be fulfilled:
U0
Z′ s ≤ ------------2 × Ia
In the condition:
U0
is the nominal AC RMS voltage between phase and neutral
Zs
is the impedance of the fault loop comprising the phase conductor and the protective conductor of
the circuit
Z′ s
is the impedance of the fault loop comprising the neutral conductor and the protective conductor of
the circuit
Ia
is the operating current of the protective device. The disconnecting time is 5 seconds (distribution
circuits)
Protective devices in IT systems
The following protective devices are recognized in IT systems:
• Insulation monitoring devices
• Overcurrent protective devices
• Residual current protective devices
The following diagram shows a Symmetra® MW installed in a IT system:
• Earthing arrangements and protective conductors - Symmetra® MW in “IT installation”
40
Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B
N
PE
Residual current protective device can not be
used at this point.
Owing to parallel return path for the fault current
Minimum cross-sectional areas:
IEC 364-5-54 § 543.1.1
With reference to:
IEC 60364-4-41 § 413.1.3.1
Residual Current Sense
Suitable earth electrode
with reference to IEC 60364-5-55 § 551.4.2
Protective Earthing Conductor
Q1
Q5
Switchgear
Bypass - input
PE
Battery
rack
PE
Battery
breaker
box Q7
PE
E
N
L3
L2
L1
Mains - input
PE
L3
L2
L1
Battery 1
+
Battery 1
-
Battery 2
-
Q8
i
Delta
Inverter
Battery 2
+
i
i
M
Main
inverter
u
Main Protective Earthing Terminal
u
Symmetra MW
Main Protective Earthing Terminal
External SSW-Bypass
Q3
See: IEC 60364-4-41 § 413.1.3
u
Service Entrance
Common-mode filter
Protective Earthing Conductor
PE
N
L3
L2
L1
UPS - output
PE
L3
L2
L1
Bypass - output
Q6
Q4
Earthing arrangements and protective conductors - Symmetra MW in TN-S installation
Residual Current Sense
PE
Residual current protective device
can be used.
( PDU )
N
PE
Residual current protective device can not be
used at this point.
Owing to parallel return path for the fault current
Minimum cross-sectional areas:
IEC 364-5-54 § 543.1.1
With reference to:
IEC 60364-4-41 § 413.1.3.1
With reference to:
Stærkstrømsbekendtgørelsen § 551.6.3 Note
( § 551.6.3 is missing in IEC 60364-5-55 )
Legal in DK ( Special cases )
Protective Earthing Conductor
Q1
Q5
PE
Battery
rack
PE
Battery
breaker
box Q7
PE
E
N
L3
L2
L1
Mains - input
PE
L3
L2
L1
Bypass - input
Battery 1
+
Common-mode filter
Battery 1
Switchgear
-
Battery 2
-
Q8
i
Delta
Inverter
Battery 2
+
i
i
M
Main
inverter
u
Main Protective Earthing Terminal
u
Symmetra MW
Main Protective Earthing Terminal
External SSW-Bypass
Q3
PE
N
L3
L2
L1
UPS - output
PE
L3
L2
L1
Bypass - output
See: IEC 60364-4-41 § 413.1.4 and "Stærkstrømsbekendtgørelsen" § 551.6.3, Note
u
Service Entrance
Residual Current Sense
Q6
Q4
Earthing arrangements and protective conductors - Symmetra MW in "TN-S installation"
( Legal in DK - special cases )
Residual Current Sense
Protective Earthing Conductor
PE
Residual current protective
device can be used.
( PDU )
PEN
Service Entrance
With reference to:
IEC 60364-4-41 § 413.1.3.1
PEN
Residual current protective
device can not be used.
Residual Current Sense
PE
Suitable earth electrode
with reference to IEC 60364-5-55 § 551.4.2
Q1
Q5
PE
Battery
rack
PE
Battery
breaker
box Q7
PE
E
N
L3
L2
L1
Mains - input
PE
L3
L2
L1
Bypass - input
Battery 1
+
Battery 1
-
Battery 2
-
Q8
i
Delta
Inverter
Battery 2
+
i
i
M
Main
inverter
u
Main Protective Earthing Terminal
u
Symmetra MW
Main Protective Earthing Terminal
External SSW-Bypass
Q3
See: IEC 60364-4-41 § 413.1.3
u
Switchgear
Common-mode filter
Protective Earthing Conductor
PE
N
L3
L2
L1
UPS - output
PE
L3
L2
L1
Bypass - output
Q6
Q4
Earthing arrangements and protective conductors - Symmetra MW in "TN-C-S installation"
Residual Current Sense
PE
Residual current protective
device can be used.
( PDU )
PEN
With reference to:
IEC 60364-4-41 § 413.1.3.1
PEN
PEN
Suitable earth electrode
with reference to IEC 60364-5-55 § 551.4.2
Q1
Q5
PE
Battery
rack
PE
Battery
breaker
box Q7
PE
E
N
L3
L2
L1
Mains - input
PE
L3
L2
Battery 1
+
-
Q3
-
Q8
i
M
Main
inverter
u
PE
N
L3
L2
L1
UPS - output
PE
L3
L2
L1
Bypass - output
The "Common-Mode Filter" has no effect in this
system configuration.
Main Protective Earthing Terminal
u
Symmetra MW
External SSW-Bypass
Delta
Inverter
Battery 2
+
i
i
Main Protective Earthing Terminal
Bypass - input
L1
Common-mode filter
Battery 1
Switchgear
Battery 2
Service Entrance
This system configuration is not recommended
See: IEC 60364-4-41 § 413.1.3
PEN
Q6
Q4
Earthing arrangements and protective conductors - Symmetra MW in TN-C installation
u
PEN
PE
N
( PDU )
N
With reference to IEC 60364-4-41 § 413.1.4.1
PE
With reference to IEC 60364-4-41 § 413.1.4.2
Suitable earth electrode: R A x Ia < 50V
Q1
Q5
Switchgear
Bypass - input
PE
Battery
rack
PE
Battery
breaker
box Q7
PE
E
N
L3
L2
L1
Mains - input
PE
L3
L2
L1
Battery 1
+
Common-mode filter
Battery 1
Residual current protective device can not be
used at this point.
Owing to parallel return path for the fault current
Residual Current Sense
-
Battery 2
-
Q8
i
Delta
Inverter
Battery 2
+
i
i
M
Main
inverter
u
Main Protective Earthing Terminal
u
Symmetra MW
Main Protective Earthing Terminal
External SSW-Bypass
Q3
See: IEC 60364-4-41 § 413.1.4
u
Service Entrance
Protective Earthing Conductor
PE
N
L3
L2
L1
UPS - output
PE
L3
L2
L1
Bypass - output
Q6
Q4
Earthing arrangements and protective conductors - Symmetra MW in TT installation
Residual Current Sense
PE
Residual current protective device
can be used.
( PDU )
N
Grounding
Z impedance
Requirement !!
IEC 60664-4-41 § 413.1.5.4
Insulation
Monitoring
Device
Grounding
impedance
Z
Suitable earth electrode: RA x Id < 50V
With reference to IEC 60364-4-41 § 413.1.5.3
Alternative:
The exposed-conductive-parts can be earthed individually or in groups.
But special demands are required. See IEC 60364-4-41 § 413.1.5.5 a)
( Alternative to earth electrode )
Protective Earthing Conductor
Q1
PE
Battery
rack
PE
Battery
breaker
box Q7
PE
E
N
L3
L2
L1
Mains - input
PE
L3
L2
Battery 1
+
-
Q3
-
Q8
i
M
Main
inverter
u
Main Protective Earthing Terminal
u
Symmetra MW
External SSW-Bypass
Delta
Inverter
Battery 2
+
i
i
Main Protective Earthing Terminal
Bypass - input
L1
Common-mode filter
Battery 1
Q5
Battery 2
Switchgear
u
Service Entrance
Earthing Conductor
See: IEC 60364-4-41 § 413.1.5
PE
N
L3
L2
L1
UPS - output
PE
L3
L2
L1
Bypass - output
Q6
Q4
Earthing arrangements and protective conductors - Symmetra MW in "IT - installation"
Residual Current Sense
PE
Residual current protective device
can be used.
( PDU )
APC Worldwide Customer Support
Customer support for this or any other APC product is available at no charge in any of the following ways:
• Visit the APC Web site to access documents in the APC Knowledge Base and to submit customer
support requests.
– www.apc.com (Corporate Headquarters)
Connect to localized APC Web sites for specific countries, each of which provides customer
support information.
– www.apc.com/support/
Global support searching APC Knowledge Base and using e-support.
• Contact an APC Customer Support center by telephone or e-mail.
– Regional centers:
Direct InfraStruXure Customer Support Line
(1)(877)537-0607 (toll free)
APC headquarters U.S., Canada
(1)(800)800-4272 (toll free)
Latin America
(1)(401)789-5735 (USA)
Europe, Middle East, Africa
(353)(91)702000 (Ireland)
Japan
(0) 35434-2021
Australia, New Zealand, South Pacific area
(61) (2) 9955 9366 (Australia)
– Local, country-specific centers: go to www.apc.com/support/contact for contact information.
Contact the APC representative or other distributor from whom you purchased your APC product for
information on how to obtain local customer support.
Entire contents © 2005 American Power Conversion. All rights reserved. Reproduction in
whole or in part without permission is prohibited. APC, the APC logo, and Symmetra are
trademarks of American Power Conversion Corporation and may be registered in some
jurisdictions. All other trademarks, product names, and corporate names are the property of
their respective owners and are used for informational purposes only.
990-1510B
*990-1510B*
07/2005
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