Page 1
Liebert®
EXM™ Distribution Cabinet
User Manual - 50 kVA -250kVA, 3 Phase, 60 Hz
Page 2
The information contained in this document is subject to change
without notice and may not be suitable for all applications. While
every precaution has been taken to ensure the accuracy and
completeness of this document, Vertiv assumes no responsibility
and disclaims all liability for damages resulting from use of this
information or for any errors or omissions. Refer to other local
practices or building codes as applicable for the correct methods,
tools, and materials to be used in performing procedures not
specifically described in this document.
The products covered by this instruction manual are manufactured
and/or sold by Vertiv This document is the property of Vertiv and
contains confidential and proprietary information owned by Vertiv.
Any copying, use or disclosure of it without the written permission of
Vertiv is strictly prohibited.
Names of companies and products are trademarks or registered
trademarks of the respective companies. Any questions regarding
usage of trademark names should be directed to the original
manufacturer.
Technical Support Site
If you encounter any installation or operational issues with your product, check the pertinent
section of this manual to see if the issue can be resolved by following outlined procedures.
Visit https://www.VertivCo.com/en-us/support/ for additional assistance.
Page 3
TABLE OF CONTENTS
IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.0 INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.0 INSTALLATION INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1 Unpacking and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1.1 Unpacking and Preliminary Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1.2 Handling Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1.3 Unit Preparation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1.4 Location Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Power and Control Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2.1 Input Power Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.2.2 Equipment Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.2.3 Grounding Electrode Conductor for Liebert EXM Distribution Cabinets with Transformer
17
2.2.4 Output Power Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.0 EQUIPMENT INSPECTION AND STARTUP . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.1 Internal Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
3.2 Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
4.0 OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.1 Startup Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.1.1 Normal System Shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.1.2 Normal System Turn On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.0 INSPECTION AND STARTUP CHECKLIST. . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
5.1 Exterior Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
5.2 Internal Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
5.2.1 Interior Inspection Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.3 Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
5.3.1 Startup Checklist. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.0 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
6.1 Repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
6.2 Inspection and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
6.2.1 Inspection Schedule. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.0 SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | i
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FIGURES
Figure 1 Typical cabinet and floor planning dimension data, 23.6" (600mm) cabinet . . . . . . . . . 4
Figure 2 Typical cabinet and floor planning dimension data, 34.6" (880mm) cabinet . . . . . . . . . 5
Figure 3 Recommended minimum front and top clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 4 Wiring diagram, 480V Liebert EXM 600mm Distribution Cabinet with transformer for
panelboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 5 Wiring Diagram, 480V Liebert EXM 600mm Distribution Cabinet with subfeed break-
ers9
Figure 6 Wiring Diagram, 480V Liebert EXM 880mm Distribution Cabinet with subfeed break-
ers10
Figure 7 Wiring diagram, 480V Liebert EXM 880mm Distribution Cabinet with transformer for
subfeed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 8 Electrical connection locations for 23.6" (600mm) cabinet . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 9 Subfeed SF2 electrical connection location for 23.6" (600mm) cabinet. . . . . . . . . . . . . 14
Figure 10 Ground lug detail for 23.6" (600mm) cabinet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 11 Electrical connection location for 34.6" (880mm) cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 12 Subfeed SF6 electrical connection location for 34.6" (880mm) cabinet. . . . . . . . . . . . . 16
Figure 13 Lug details for 34.6" (880mm) cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 14 Typical Liebert EXM 600mm Distribution Cabinet equipment arrangement. . . . . . . . 18
Figure 15 Typical Liebert EXM 880mm Distribution Cabinet equipment arrangement. . . . . . . . 19
TAB LES
Table 1 23.6-inch (600mm) cabinet weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Table 2 34.6-inch (880mm) cabinet weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Table 3 Liebert EXM Distribution Cabinet heat output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 4 Physical standards and parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Table 5 Suggested minimum input wire size data—208V Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Table 6 Suggested minimum input wire size data—480V Units, No Transformer . . . . . . . . . . .26
Table 7 Main input circuit breaker interrupt rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Table 8 Torque specifications, general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Table 9 Panelboard main circuit breaker torque specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Table 10 Branch circuit breaker torque specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 11 Terminal block compression lug torque specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | ii
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IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important instructions that should be followed during installation of your Liebert
EXM Distribution Cabinet. 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 electric shock and arc flash. Can cause equipment damage, injury and death.
Verify that all incoming line voltage (power) and low-voltage (control) circuits are
de-energized and locked out before installing cables or making connections.
Equipment inspection and startup should be performed only by trained personnel wearing
appropriate safety headgear, gloves, shoes and glasses. Lethal voltages are present during
startup procedures. Electrical safety precautions must be followed throughout inspection
and startup.
Only properly trained and qualified service personnel wearing appropriate safety headgear,
gloves, shoes and glasses should perform maintenance on the Liebert Distribution Cabinet
system. All voltage sources to the unit must be disconnected before inspecting or cleaning
within the cabinet.
Lethal voltages exist within the equipment during operation. Observe all warnings and
cautions in this manual. Failure to comply may result in serious injury or death. Obtain
qualified service for this equipment as instructed.
The monitoring system contains a lithium battery for memory backup. There is a danger of
explosion if this battery is incorrectly replaced. Replace only with same or equivalent type.
Dispose of used batteries according to the manufacturer’s instructions.
NOTE
The unit should not be loosened from the shipping pallet until all handling by fork lift or pallet jack
is completed.
All power and control wiring should be installed by licensed electricians and must comply with
the NEC and applicable codes.
ELECTROMAGNETIC COMPATIBILITY—The Liebert EXM Distribution Cabinet complies with
the limits for a Class A digital device, pursuant to Part 15 of FCC rules.
Operation is subject to the following conditions:
• This device may not cause harmful interference.
• This device must accept any interference received, including interference that may cause undesired
operation.
Operating this device in a residential area is likely to cause harmful interference that users must
correct at their own expense.
The Liebert EXM Distribution Cabinet complies with the requirements of EMC Directive
2014/30/EU and the published technical standards. Continued compliance requires installation in
accordance with these instructions and use of accessories approved by Vertiv.
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 1
Page 6
1.0 INTRODUCTION
The Liebert EXM Distribution Cabinet is designed to operate in UPS normal mode, static bypass
mode and maintenance mode. The Liebert EXM Distribution Cabinet offers 50-250kVA capacity
to match the associated Liebert EXM frame offerings. Each of the Liebert EXM Distribution
Cabinet capacities offers an optional 208/120V output transformer as well as multiple output
distribution selections.
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 2
Page 7
2.0 INSTALLATION INSTRUCTIONS
2.1 Unpacking and Installation
NOTE
Read the entire manual before installing and operating the system. Upon receipt of a Liebert EXM
Dis
tribution Cabinet, the installer should perform the following steps to ensure a quality
installation.
2.1.1 Unpacking and Preliminary Inspection
A quality installation begins on the receiving dock.
1. Inspect the shipment for damage or signs of mishandling before unpacking the unit(s).
2. If the Liebert EXM
carefully.
Use care to avoid puncturing the container with sharp objects that would damage the contents.
3. Remove the packing and vapor barriers and inspect the equipment for any obvious shipping damages.
NOTE
The units should not be loosened from the shipping pallet until all handling by forklift or pallet
jack is completed. Complete internal inspection should be accomplished only after equipment
positioning and prior to electrical hookup.
4. If any damage is observed, immediately file a damage claim with the shipping agency and forward a copy
to:
Vertiv Corporation
1050 Dearborn Drive
P.O. Box 29186
Columbus, Ohio 43229 USA
Distribution Cabinet was shipped in an export crate, open the shipping crate
2.1.2 Handling Considerations
The Liebert EXM Distribution Cabinet is bolted to a wooden pallet to allow handling by forklift
equipment.
The Liebert EXM Distribution Cabinet is furnished with casters to allow the unit to be rolled into
place after it has been unbolted from the pallet. The unit should be kept on the shipping pallet
until it has been moved by forklift as close as practical to its installation location.
Refer to the cabinet drawings furnished with the Liebert EXM Distribution Cabinet for the unit’s
size and weight. Typical cabinet dimensions and weights are shown in Figures 1 and 2.
The route to the Liebert EXM Distribution Cabinet’s installation area should be planned to ensure
that all passages, including doorways, elevators, ramps and hallways, are large enough to
accommodate the unit and that the floors are strong enough to support the weight. Determine
whether any corners or offsets would cause problems in maneuvering the unit.
Vertiv recommends removing the exterior side panels, if supplied, before the unit is moved. This
will prevent scratches, dents and other damage to the panels.
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 3
Page 8
Figure 1 Typical cabinet and floor planning dimension data, 23.6" (600mm) cabinet
Base
Pan
DETAIL B
39.5" (1003.7mm)
39.1" (93.7mm)
1.55"
(39.4mm)
Ventilation
Area
Customer Input
Conduit Plate **
When Stand-Alone
Panelboard
Output **
1
1
C
23.95"
(608.4mm)
Liebert
Liebert
LDMF
LDMF
E-Box Cover
78.7"
(1999.9mm)
(125mm)
375"
(14.76mm)
4.9"
8.3"
(210mm)
4" (103mm)
31.5"
(800.8mm)
B
22"
(560.4mm)
11.98"
(304.2mm)
DETAIL C
A
34.9"
(886mm)
(746.1mm)
29.4"
Ventilation
Cover Plate**
1
Customer input conduit plate and panelboard output
conduit plate may be exchanged in the field to allow customer
to decide whether to cable the unit from top or bottom.
16.1"
(409mm)
21.7"
(550mm)
DETAIL A
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 4
Page 9
Table 1 23.6-inch (600mm) cabinet weight
Unit
kVA
50
150
Maximum
Weight, lb
(kg)
1749 (793)100
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 5
Page 10
Figure 2 Typical cabinet and floor planning dimension data, 34.6" (880mm) cabinet
A
B
Ventilation
Area
Ventilation
Cover
Plate
1
1
1
1
Input Conduit
Plate for
Stand-Alone
Configuration
Subfeed
Output
Conduit
Plate
E-Box Cover
35" (888.4mm)
4.9"
(125mm)
4.9"
(125mm)
4.9"
(125mm)
4.9"
(125mm)
14.7"
(375mm)
31.9"
(809.7mm)
17.1"
(434.2mm)
78.7"
(1999.9)
39.5" (1003.7mm)
39.1" (993.7mm)
31.9"
(809.7mm)
15.9"
(403.6mm)
1.5" (38.9mm)
DETAIL B
DETAIL A
34.3"
(872.2mm)
28.3"
(718.1mm)
Input conduit plate and subfeed conduit plate can be
exchanged to permit either top or bottom cable entry.
26" (660mm)
31.5" (799mm)
Table 2 34.6-inch (880mm) cabinet weight
Unit kVA
150
250
Maximum
Weight, lb (kg)
2538 (1151)200
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 6
Page 11
2.1.3 Unit Preparation
The Liebert EXM Distribution Cabinet may be easily removed from the shipping pallet and installed
by customer personnel. A typical procedure is:
1. Set the pallet assembly in a level area where there is enough room to move the Liebert EXM Distribution
Cabinet off the pallet onto the floor.
2. Remove side panels from the Liebert EXM D
panels is furnished in the installation packet.
3. Remove the bolts and two mounting brackets holding the unit to the shipping pallet.
Mounting brackets are located on either side of the unit.
4. Use a forklift to move the unit off the pallet. If a ramp is available from the pallet, it can be used to roll the
distribution cabinet off the pallet onto the floor.
5. Roll the Liebert EXM
use care when positioning unit over the floor cutout to prevent the casters from falling through the
cutout.
Distribution Cabinet to the installation area. For units to be placed on a raised floor,
istribution Cabinet, if supplied. An Allen wrench for the side
NOTE
Before maneuvering the unit into its final position, read and follow all advisories in 2.1.4 Location Considerations.
2.1.4 Location Considerations
The Liebert EXM Distribution Cabinet should be placed near the load(s) it will supply, preferably
within the data center.
Equipment location should employ the shortest output distribution cable runs consistent with
logical equipment arrangement and allowance for expansion.
The Liebert EXM Distribution Cabinet is intended for indoor installation in an area with ambient
temperatures of 32°F to 104°F (0°C to 40°C) with a relative humidity of 0% to 95% (noncondensing).
Bottom clearance is required for units with bottom entry/exit of cables. This clearance may be
provided by a raised floor at least 6" (150mm) high. Figures 1 and 2 show the typical raised-floor
cutout dimensions for cables and cooling airflow.
Recommended minimum service clearances are shown in Figure 3. The National Electrical
Code (NEC) requires the indicated front and rear clearances for service access. Clearance above
the unit is required for cooling airflow (exhaust).
As do all electrical devices, the Liebert EXM Distribution Cabinet produces heat under normal
operation (see Tab le 3). This heat must be accounted for when calculating the environmental
conditions of the room.
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 7
Page 12
Figure 3 Recommended minimum front and top clearances
18" (457mm)
36"
(914mm)
Front
NOTE
Service access is required at the front.
Table 3 Liebert EXM Distribution Cabinet heat output
Unit kVA
50 4700 (1.37)
100 8300 (2.43)
150 11,600 (3.39)
200 15,500 (4.45)
250 18,400 (5.39)
Full Load Heat Output
BTU/Hr (kW)
2.2 Power and Control Wiring
Power and control wiring should be installed by licensed electricians. All power and control wiring
must comply with the NEC and applicable local codes.
Input power connections are always to be fed from the Liebert EXM UPS. Either attached using
factory-provided cables or remotely using cables provided by others.
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 8
Page 13
Figure 4 Wiring diagram, 480V Liebert EXM 600mm Distribution Cabinet with transformer for panelboard
Phase C
Phase B
Phase A
Neutral
Ground
Panelboard
42 / 54 / 72 84 Pole
Main Breaker
W28
W29
W30
Neutral
W91
W94
Ground
W92
W25
X1
W26
W27
X2
Isolation
Transformer
H2
H1
X3
W90
H3
Future
Use
X0
Neutral
Busbar
Ground
to Unit
Frame
W95
Customer
Ground Busbar
Ground
Electrode
Ground
to Unit
POWER BLOCK TB2
See
Note 2
Frame
609363
Local GEC
Pg. 3, Rev. 2
PANELBOARD
W01
W02
W03
Input Breaker
Phase C
Phase B
Phase A
INPUT with BREAKER
Utility
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 9
Ground
Input
W01
W02
W03
Phase C
Phase B
Phase A
Utility
Input
INPUT without BREAKER
W00
Ground
Factory-Supplied Wiring
Field-Supplied Wiring
LEGEND
TRANSFORMER
NOTES
1. Wiring furnished by factory.
Busbar
2. Field-supplied grounding electrode
conductor to be installed in accordace
with National Electrical Code Article 250-26.
Page 14
Figure 5 Wiring Diagram, 480V Liebert EXM 600mm Distribution Cabinet with subfeed breakers
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 10
Page 15
Phase B
Phase C
Phase A
Ground
Phase B
Phase C
Phase A
Ground
Phase B
Phase A
Phase C
Ground
609363
Pg. 1, Rev. 2
CB2
W12
W11
W10
CB1
W09
SUBFEED BREAKERS
W08
W07
TB2
Power Block
W25
W26
Phase B
Busbar
Phase A
W27
Phase C
Customer
Ground Busbar
POWER BLOCK TB2
Ground Electrode
See Note 2
Ground
to Unit
Frame
DISTRIBUTION BUSBAR
Factory-Supplied Wiring
Factory-Supplied
or Field-Supplied Wiring
Busbar
LEGEND
W01
W02
W03
Input Breaker
Phase A
INPUT BREAKER
Utility
Ground
Input
Phase C
Phase B
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 11
W01
W02
Phase B
Phase A
Utility
INPUT without BREAKER
Input
W03
W00
Phase C
Ground
NOTES
1. Wiring furnished by factory.
2. Field-supplied grounding electrode
conductor to be installed in accordace
with National Electrical Code Article 250-26.
Page 16
Figure 6 Wiring Diagram, 480V Liebert EXM 880mm Distribution Cabinet with subfeed breakers
Phase A
Phase B
Phase C
Ground
Phase B
Phase C
Phase A
Ground
Phase B
Phase C
Phase A
Ground
Phase B
Phase C
Phase A
Ground
Phase B
Phase C
Phase A
Ground
Phase B
Phase C
Phase A
Ground
609365
Pg. 1, Rev. 2
W22
CB5
W21
W20
CB6
W24
W23
SUBFEED BREAKERS
W22
W19
W16
W13
W10
W07
Busbar
Phase A
W01
W19
W23
W20
W17
W14
Phase B
W02
W11
CB4
W08
W18
W17
W24
W21
W18
Phase C
W03
W15
W16
W12
W09
CB3
DETAIL A
W15
W14
W13
BUSBAR
Ref. Detail A
Phase B
Phase A
CB2
Phase C
W12
W11
Customer
CB1
W10
Ground
Electrode
See
Ground Busbar
Ground
to Unit
W09
Note 2
Frame
W08
W07
LEGEND
Factory-Supplied Wiring
Field-Supplied Wiring
Distribution Busbar
Busbar
W01
W02
Input Breaker
Phase B
Phase A
INPUT BREAKER
Utility
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 12
W03
Ground
Phase C
Input
W01
W02
W03
W00
Ground
Phase C
Phase B
Phase A
Utility
INPUT without BREAKER
Input
NOTES
1. Wiring furnished by factory.
2. Field-supplied grounding electrode
conductor to be installed in accordace
with National Electrical Code Article 250-26.
Page 17
Figure 7 Wiring diagram, 480V Liebert EXM 880mm Distribution Cabinet with transformer for subfeed
609365
Pg. 2, Rev. 2
INPUT with BREAKER
INPUT without BREAKER
Input Breaker
Utility
Input
Utility
Input
Phase C
Phase B
Phase A
Ground
W01
W02
W03
W01
W02
W03
Phase C
Phase B
Phase A
Phase C
Phase B
Phase A
Ground
W24
W23
W22
CB6
W21
W20
W19
CB5
W18
W17
W16
CB4
W15
W14
W13
CB3
W12
W11
W10
CB2
W09
W08
W07
CB1
Busbar
DETAIL A
W22
W04
W19
W16
W13
W10
W07
Phase A
W23
W05
W20
W17
W14
W11
W08
Phase B
W24
W06
W04
W05
W06
W90
W21
W18
W15
W12
W09
Phase C
SUBFEED BREAKERS
TRANSFORMER
LEGEND
Ground
to Unit
Frame
Ref. Detail A
BUSBAR
Customer
Ground Busbar
Neutral
Busbar
Ground
to Unit
Frame
Phase A
Phase B
Phase C
Neutral
Ground
Phase A
Phase B
Phase C
Neutral
Ground
Phase A
Phase B
Phase C
Neutral
Ground
Phase A
Phase B
Phase C
Neutral
Ground
Phase A
Phase B
Phase C
Neutral
Ground
Phase A
Phase B
Phase C
Neutral
Ground
Factory-Supplied Wiring
Field-Supplied Wiring
Busbar
NOTES
1. Wiring furnished by factory.
2. Field-supplied grounding electrode
conductor to be installed in accordace
with National Electrical Code Article 250-26.
H1
X1X2X3
X0
H2
H3
Isolation
Transformer
Local GEC
Ground
Electrode
See
Note 2
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 13
Page 18
2.2.1 Input Power Connections
WARNING
Risk of electric shock and arc flash. Can cause injury and death.
Verify that all incoming line voltage (power) and low-voltage (control) circuits are
de-energized and locked out before installing cables or making connections, whether in
the junction box or in the Liebert EXM Distribution Cabinet.
The 3-phase power input to the Liebert EXM Distribution Cabinet is supplied directly from the
Liebert EXM UPS.
The input feeder circuit should be sized in accordance with the NEC and any local building codes
to ensure the feeder’s ability to safely carry the system’s full load current, including losses.
Typical conductor size data is shown in Ta bl e 5 . All connections must comply with the NEC and
all other applicable codes.
The main input feeder should consist of 3-phase conductors and one (safety) ground conductor
(3W + G).
Stand-alone distribution cabinets have an input circuit breaker; attached distribution cabinets do
not have an input circuit breaker.
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 14
Page 19
Figure 8 Electrical connection locations for 23.6" (600mm) cabinet
ON
OFF
Lug Set
Mech for
Input
Breaker
Ground Connection
For Customer
Term Lug Mech
#14-2/0 1/4"
Clear
Plastic
Cover
37.5" (953.3mm)
Panelboard
Output
Input
Breaker
23.6" (600mm)
ON
OFF
78.7"
(1999.9mm)
Top Input Cable
to Input Breaker
in Stand-Alone
Configuration
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 15
Page 20
Figure 9 Subfeed SF2 electrical connection location for 23.6" (600mm) cabinet
37.53" (953.3mm)
23.62" (600mm)
Subfeed
Breaker
Ground
Busbar
Input
Breaker
Lug Set
Mech
for Input
Breaker
Neutral
Bar
Subfeed
Breaker
Output
Top Input Cable
to Input Breaker
in Stand-Alone
Configuration
78.7"
(1998mm)
0.4"
(10.2mm)
Ø 0.265"
(6.7mm)
0.6"
(15.2mm)
0.2" (5mm)
1.5" (38.1mm)
0.8"
(20.3mm)
0.8"
(20.3mm)
Slotted or hex
recessed screw
included with lug
(not shown).
Rated for minimum
14 AWG, maximum
2/0 STR copper
or aluminum wire
Notes
1. Part must be marked with UL
and CSA logos and wire range.
2. Thomas and Betts part is marked BKB.
E-362B
Rev. 4
Figure 10 Ground lug detail for 23.6" (600mm) cabinet
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 16
Page 21
Figure 11 Electrical connection location for 34.6" (880mm) cabinet
34.7" (880mm)
Subfeed
Breaker
Input
Breaker
Lug Set
Mech for
Input
Breaker
Lug Set
Mech for
Input and
Subfeed
Ground
Lug Set
Mech
For Subfeed
Neutral
Lug Set
Mech for
Subfeed
Breaker
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 17
Page 22
Figure 12 Subfeed SF6 electrical connection location for 34.6" (880mm) cabinet
37.53" (953.3mm)
34.65" (880mm)
Subfeed
Breaker
Input
Breaker
Lug Set
Mech
for Subfeed
Neutral
Lug Set
Mech
for Subfeed
Ground
Lug Set
Mech
for Input
Breaker
Subfeed
Breaker
Output
78.7"
(1999mm)
Ground Lug Detail
Item No. 14014
Number of Ports: 2
Conductor Range; 14--2/0 AWG
Torque: 50 lb-in (5.6Nm)
Input and Subfeed Breaker Lug
Item No. 552950P1
Number of Ports: 2
Conductor Range; 2/0 AWG--500 kcmil
Torque: 442 lb-in (50Nm)
Neutral Lug Detail
Item No. 421-337
Number of Ports: 4
Conductor Range; 2 AWG--600 kcmil
Torque: 375 lb-in (42.4Nm)
Figure 13 Lug details for 34.6" (880mm) cabinet
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 18
Page 23
2.2.2 Equipment Grounding
Equipment grounding is primarily for safety. Correct implementation of grounding also enhances
equipment performance. All power feeders must include equipment grounding means as
required by the NEC and local codes.
An insulated ground conductor is recommended to be run in each feeder conduit. Ground
conductors must be at least the minimum size per NEC Table 250-66. Larger wire sizes may be
used for increased system performance.
If the input power feeder conduit is used as a grounding conductor, adequate electrical continuity
must be maintained at all conduit connections.
WARNING
Risk of electric shock. Can cause equipment damage, improper operation, injury and death.
Isolating bushings must not be used in a metal conduit run. These busings might prevent
the system from being properly grounded.
2.2.3 Grounding Electrode Conductor for Liebert EXM Distribution Cabinets with
Transformer
Required by code - The Liebert EXM Distribution Cabinet with transformer must be grounded
according to the safety practices of NEC 250-26. A local grounding electrode conductor is
recommended in addition to the equipment safety ground which is normally run with the input
power conductors. (See Figures 8 through 13.)
2.2.4 Output Power Connections
Output circuit breaker(s) and/or panelboards with ground and neutral provisions are provided
inside the unit for connecting load(s) as required. (See Figures 8 through 13.)
WARNING
Risk of electric shock and arc flash. Can cause injury and death.
Verify that all incoming line voltage (power) and low-voltage (control) circuits are
de-energized and locked out before installing cables or output breakers or making
connections, whether in the junction box or in the unit.
Verify that incoming line voltage circuits are de-energized and locked out before installing
output breakers and cables.
Code Compliance—All output cables and connections must comply with the NEC and all other
applicable codes.
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 19
Page 24
Figure 14 Typical Liebert EXM 600mm Distribution Cabinet equipment arrangement
34.6" (880mm)
94" (2388mm)
23.6"
(600mm)
11.8"
(300mm)
23.6"
(600mm)
78.7"
(2000mm)
Battery
Cabinet #1
NOTES
1. 18" (457mm) minimum clearance above unit for ventilation.
2. Keep cabinet within 15 degrees of vertical.
3. Cable Entry
UPS: Bottom cable entry through removable plates
MBC: Top and bottom entry through removable plates
Remove, punch to suit conduit size and replace.
4. Unit bottom is structurally adequate for forklift handling.
5. Control wiring and power wiring must be run in separate conduits.
6. All wiring is to be in accordance with national and local electrical codes.
7. All battery cabinets must be positioned on the left side of the UPS.
FRONT
MBCUPS
Distribution
Cabinet
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 20
Page 25
Figure 15 Typical Liebert EXM 880mm Distribution Cabinet equipment arrangement
47.2" (1200mm)
127.2" (3228mm)
32.9"
(840mm)
11.8" (300mm)
34.6" (880mm)
78.7"
(2000mm)
Battery Cabinet #1 UPS
FRONT VIEW
EXM43016
Rev. 0
MBC Distribution Cabinet
NOTES
1. All dimensions are in inches (mm).
2. 24" (610mm) minimum clearance above the unit for ventilation.
3. Keep cabinet within 15 degrees of vertical.
4. Top and bottom cable entry available through removable access plates.
Remove, punch to suit conduit 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 must be in accordance with national and local electrical codes.
8. All battery cabinets must be positioned on the left side of the UPS.
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 21
Page 26
3.0 EQUIPMENT INSPECTION AND STARTUP
3.1 Internal Inspection
A detailed internal inspection should be performed after the unit is in place and before it is
energized, to ensure trouble-free startup. The same internal inspection should be carried out
when performing preventive maintenance.
WARNING
Risk of electric shock and arc flash. Can cause injury and death.
Verify that all incoming line voltage (power) and low-voltage (control) circuits are
de-energized and locked out before performing the internal inspection.
Open the unit - Gain access to the internal components of the Liebert EXM Distribution Cabinet
unit by removing the exterior panels and internal accent panels.
Visually inspect - Be sure wiring and components are not damaged.
Check power connections - Check all power connections for tightness. Refer to Tab le s 8
through 11 for torque requirements of all electrical connections.
Perform formal detailed inspection - Follow the procedures described in 5.0 - Inspection and
Startup Checklistwhen performing detailed inspection.
3.2 Startup
Checklists
Follow the detailed step-by-step checklist (5.0 - Inspection and Startup Checklist) when
installing and starting up the Liebert EXM Distribution Cabinet.
Initial System Startup
A qualified electrician must be employed to perform the equipment inspection and startup.
Liebert system startup may be arranged by calling your local Vertiv sales representative or Vertiv.
In the United States, call 1-800-543-2378.
Warranty
A copy of the appropriate checklist (furnished with the equipment) must be completed, signed,
dated and returned to Vertiv. Warranty coverage of the equipment is not effective unless the
checklist has been received by the factory.
WARNING
Risk of improper startup. Can cause equipment damage, personal injury and death.
Hazardous voltages are present during startup procedures. Electrical safety precautions
must be followed throughout inspection and startup.
Equipment inspection and startup should be performed only by properly trained and
qualified personnel wearing appropriate safety headgear, gloves and shoes.
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 22
Page 27
4.0 OPERATING INSTRUCTIONS
4.1 Startup Procedures
Before the unit is placed into service after initial installation, after equipment relocation, or after
equipment has been de-energized for an extended period of time, perform equipment inspection
and startup procedures as detailed in 3.0 - Equipment Inspection and Startup and 5.0 -
Inspection and Startup Checklist.
After initial system startup, the following guidelines can be used for standard equipment
operation. These guidelines should be reviewed for any special equipment modifications, special
site considerations or company policies that may require changes to the standard equipment
operation.
4.1.1 Normal System Shutdown
To perform a normal system shutdown, perform an orderly load equipment shutdown according
to the load equipment manufacturer’s recommended shutdown sequence. The load equipment
can be turned Off at each piece of load equipment or at the Liebert EXM Distribution Cabinet’s
output distribution (circuit breaker) panels located behind the Liebert EXM Distribution Cabinet’s
front door. Turn Off all unit output breakers, then turn Off the unit’s main input circuit breaker. To
remove all power from the Liebert EXM Distribution Cabinet, turn Off the building power to the
Liebert EXM Distribution Cabinet’s input breaker or junction box.
4.1.2 Normal System Turn On
Make certain all of the Liebert EXM Distribution Cabinet’s circuit breakers are in the Off position. All
unit circuit breakers are located behind the front doors. Turn On building power to the Liebert
EXM Distribution Cabinet. Turn On the Liebert EXM Distribution Cabinet’s main input circuit breaker.
If the circuit breaker has been tripped Off (instead of being turned Off), the circuit breaker handle
must be moved to the Off position before being turned On. If the Liebert EXM Distribution Cabinet
has a voltage monitoring panel, verify proper output voltages before turning On output circuit
breakers. Turn On the panelboard main breakers. Turn On each output circuit breaker following
the load equipment manufacturer’s startup sequence.
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 23
Page 28
5.0 INSPECTION AND STARTUP CHECKLIST
5.1 Exterior Inspection
Exterior Inspection Checklist
___ 1. Confirm that the exterior of the unit is undamaged.
___ 2. Confirm that service and ventilation clearances are adequate. (See Figure 3).
5.2 Internal Inspection
A detailed internal inspection should be performed after the unit is in place and before it is
energized to insure trouble-free startup. The same internal inspection should be carried out when
performing preventive maintenance.
WARNING
Risk of electric shock. Can cause injury and death. Verify that all incoming power circuits
are de-energized and locked out before performing the internal inspection.
Gain access to the internal components of the Liebert EXM Distribution Cabinet™ unit by
removing the external and interior side panels.
5.2.1 Interior Inspection Checklist
___ 1. Inspect all wire and conductor insulation for damage.
___ 2. Check all breaker connections for tightness. Retorque if necessary. Unless otherwise labeled, use the
recommended tightening torque as shown in Table 10.
___ 3. Check all terminal block connections for tightness. Retorque if necessary. Unless otherwise labeled, use the
recommended tightening torque as shown in Table 11.
___ 4. Verify that input phase cables A, B and C are properly connected to the input breaker (standalone units)
with the correct phase rotation. Refer to Figures 4 and 7 for additional details. When the Liebert EXM
Distribution Cabinets are attached, the input power connects to a busbar or transformer.
___ 5. Verify that the input ground cable connects to the internal customer ground busbar.
___ 6. Verify that the internal customer ground busbar is connected to the Liebert EXM Distribution Cabinet
frame.
___ 7. Verify that the output neutral cable is connected to the internal customer ground busbar.
___ 8. Verify that the output ground cable is connected to the internal customer ground busbar.
___ 9. Remove any foreign objects from the components or the interior area of the unit.
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 24
Page 29
5.3 Startup
A qualified electrician should be employed to perform the equipment inspection and startup.
Liebert system startup may be arranged by calling your local Vertiv sales representative or Vertiv.
In the United States, call 1-800-543-2378.
A copy of the appropriate checklist (furnished with the equipment) must be completed, signed,
dated and returned to Vertiv. Warranty coverage of the equipment is not effective unless the
checklist is received by the factory.
WARNING
Equipment inspection and startup should be performed only by qualified trained personnel.
Electrical safety precautions must be followed throughout inspection and startup.
Hazardous voltages are present in the equipment throughout the majority of the startup
procedure. Use proper safety equipment. Proceed with caution.
5.3.1 Startup Checklist
___ 1. Make certain that all circuit breakers are in the Off position and that power to the unit is locked out.
___ 2. Verify proper input power connections to unit, including the equipment grounding conductor.
___ 3. Turn On the building power to the unit.
___ 4. Check the phase rotation at the input busbars. Phase rotation should be A, B, C, left-to-right.
___ 5. Check and record the input voltage. Measured voltages should correspond to the unit’s nameplate input
voltage.
Input
Volts, Phase A to Phase
B =
Volts, Phase B to Phase
C =
Volts, Phase C to Phase
A =
___ 6. Check the phase rotation at the panelboard main breakers. Phase rotation should be A, B, C, left-to-right.
___ 7. Check the phase rotation at the transformer output. Phase rotation should be A, B, C, left-to-right.
___ 8. Check and record the input voltage at each of the panelboard main breakers. Measured voltages should
correspond to the unit’s nameplate input voltage.
Panelboard 1 Panelboard 2 Panelboard 3 Panelboard 4
Volts, Phase A to Phase
B =
Volts, Phase B to Phase
C =
Volts, Phase C to Phase
A =
If output voltage or phase rotation is incorrect, check for wiring errors or incorrect input voltage, Contact
Vertiv at 1-800-543-2378) in the USA or the local factory representative for assistance.
___ 9. Turn On the panelboard main breakers.
___ 10.Replace internal and external panels, if supplied.
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 25
Page 30
6.0 MAINTENANCE
6.1 Repair
Even the most reliable equipment may fail. Vertiv is at your service to ensure fast repair of your
unit and minimum downtime of your installation.
WARNING
Risk of electric shock and arc flash. Can cause equipment damage, injury and death.
Only properly trained and qualified service personnel wearing appropriate safety headgear,
gloves, shoes and glasses should perform maintenance on the Liebert EXM Distribution
Cabinet system.
Standard electrical troubleshooting procedures should be used to isolate problems in the unit. If
there are questions, don’t hesitate to contact Vertiv.
Repair or replacement of standard items, such as circuit breakers, fuses, transformers, capacitors
and indicator lights can either be handled by qualified electricians or referred to Vertiv.
Repairs related to the monitoring system should be referred to Vertiv. To contact Vertiv for
information or repair service in the United States, call 1-800-543-2378.
6.2 Inspection and Cleaning
Air circulation through the cabinet may cause dust to accumulate on internal components.
Cleaning should be done as necessary during electrical inspections.
Annual general system inspections, cleaning, and operation checks are recommended to ensure
system performance and long service life.
WARNING
Risk of electric shock and arc flash. Can cause equipment damage, injury and death.
Only properly trained and qualified service personnel wearing appropriate safety headgear,
gloves, shoes and glasses should perform maintenance on the Liebert EXM Distribution
Cabinet system. All voltage sources to the unit must be disconnected before inspecting or
cleaning within the cabinet.
6.2.1 Inspection Schedule
• It is difficult to establish a schedule for periodic cleanings because conditions vary from site to site.
Inspections after the first 24 hours, 30 days and 6 months of operation should help determine a pattern for
the inspection schedule.
• Electrical connections and component mountings should be inspected after the first 24 hours, 30 days, and
6 months of operation. Inspections should be conducted annually thereafter.
• Ventilation openings and grilles should be inspected and cleaned every 6 months to one year.
• A complete inspection and operational checkout should be performed annually. This is best done by
performing the inspection and startup procedure as detailed in
Checklist.
• Vertiv offers a complete range of preventive maintenance services. These include thorough equipment
performance checks and calibration of electronics. Contact Vertiv in the United States by calling
1-800-543-2378 for details.
5.0 - Inspection and Startup
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 26
Page 31
7.0 SPECIFICATIONS
Table 4 Physical standards and parameters
Distribution Cabinet Parameters
Standard Color Black (ZP-7021)
Front Door Opening (for serviceability)
Degree of Protection
Minimum Clearance, Top 18" (457mm)
Minimum Clearance, Back 0"
Minimum Clearance, Sides 0"
Cable Entrance Top or Bottom
Standards & Conformities
IP 20 (with and without front door open)
UL 60950-1-01 2nd Ed.; CSA C22.2 No. 60950-1-07
FCC Part 15, Class A; ISTA Procedure 1H; WEEE;
Environmental
Storage Temperature Range, °F (°C) -13°F to 158°F (-25°C to 70°C)
Operating Temperature Range, °F (°C) 32°F to 104°F (0 to 40°C)
Relative Humidity
up to 95% Non-Condensing
(Operating and Non-Operating)
Table 5 Suggested minimum input wire size data—208V Units
Input data with Transformer (3-Phase + Ground)
Recommended
Rating
(kVA)
100 480 123 175 2/0 4/0 2/0 4/0
150 480 184 250 250 350 250 350
200 480 246 350 (2) # 2/0 (2) # 4/0 (2) # 2/0 (2) # 4/0
250 480 307 400 (2) # 3/0 (2) # 250 (2) # 3/0 (2) # 250
Subfeed (3-Phase + 2 Neutral + Ground)
Output
Vol ta g
208 250 (2) # 2/0 (2) # 4/0 (2) # 2/0 (2) # 3/0
208 400 (2) # 250 (2) # 350 (2) # 250 (2) # 350
Input
Vol ta geInput Current
50 480 62 80 4 2 4 2
Subfee
e
d
Rating
Amps
Recommende
d
Wire Size 75°C
(Copper at
30°C
Ambient)
Recommended
Breaker, Amps
Recommended
Wire Size 75°C
(Aluminum at
30°C
Ambient)
Wire Size 75°C
(Copper at
30°C
Ambient)
Recommended
Wire Size 90°C
(Copper at
40°C
Ambient)
Val ue s
More than 180°
Recommended
Wire Size 75°C
(Aluminum at
30°C
Ambient)
Recommended
Wire Size 90°C
(Aluminum at
40°C
Ambient)
Recommended
Wire Size 90°C
(Copper at
40°C
Ambient)
Recommended
Wire Size 90°C
(Aluminum at
40°C
Ambient)
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 27
Page 32
Table 6 Suggested minimum input wire size data—480V Units, No Transformer
Input data without Transformer (3-Phase + Ground)
Recommende
d
Rating
kVA
50 480 60 80 4 2 4 2
100 480 120 150 1/0 1/0 3/0 3/0
150 480 180 225 4/0 4/0 300 300
200 480 241 300 2/0 2/0 3/0 3/0
250 480 301 400 3/0 3/0 250 250
Subfeed (3-Phase + Ground)
Outpu
Vol tag
480 60 6 4 6 4
480 70 4 3 4 3
480 80 4 2 4 2
480 125 1 2/0 1 2/0
480 150 1/0 3/0 1/0 3/0
480 175 2/0 4/0 2/0 4/0
480 200 3/0 250 3/0 250
Input
,
Vol tageInput Current
t
Subfee
e
d
Rating
Amps
Recommende
d
Wire Size 75°C
(Copper at
30°C
Ambient)
Recommended
Breaker, Amps
Recommended
Wire Size 75°C
(Aluminum at
30°C
Ambient)
Wire Size 75°C
(Copper at
30°C
Ambient)
Recommende
d
Wire Size
90°C
(Copper at
40°C
Ambient)
Recommended
Wire Size 75°C
(Aluminum at
30°C Ambient)
Recommended
Wire Size 90°C
(Aluminum at
40°C
Ambient)
Recommende
d
Wire Size
90°C
(Copper at
40°C
Ambient)
Recommend
(Aluminum
ed
Wire Size
90°C
at
40°C
Ambient)
Table 7 Main input circuit breaker interrupt rating
Standard Interrupt Rating*
480V
65 kAIC
* Refer to unit specification sheet for units equipped with non-standard main
input breakers.
Table 8 Torque specifications, general
Electrical Connections
with 1 Belleville Washer
Torque Torque
lb-in N-m lb-in N-m
Bolt Shaft Size, in./mm
1/4 / M6 40 4.5 80 9.0
5/16 / M8 80 9.0 160 18.0
Electrical Connections
with 2 Belleville Washers
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 28
Page 33
Table 8 Torque specifications, general
Electrical Connections
with 1 Belleville Washer
Torque Torque
lb-in N-m lb-in N-m
3/8 / M10 120 13.6 240 27.1
1/2 / M12 240 27.1 480 54.2
Input and Output Breakers
Up to 150 amp 80 9.0 160 18.0
175 - 500A 120 13.6 240 27.1
Electrical Connections
with 2 Belleville Washers
Table 9 Panelboard main circuit breaker torque specifications
Tor qu e
lb-
in N-m
Busbar-to-Breaker 240 27.1
Table 10 Branch circuit breaker torque specifications
Breaker Size lb-in N-m
Up to 30 amp 35 4.0
40 to 100 amp 45 5.1
Table 11 Terminal block compression lug torque specifications
AWG Wire Size
or Range
#14 - #10 35 4.0
#8 40 4.5
To rqu e
lb-in N-m
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 29
Page 34
NOTES
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 30
Page 35
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 31
Page 36
Vertiv™ |Liebert® Distribution Cabinet™ for Liebert EXM™ User Manual | 32
Page 37
Page 38
VertivCo.com | Vertiv Headquarters, 1050 Dearborn Drive, Columbus, OH, 43085, USA
© 2018 Vertiv Co. All rights reserved. Vertiv and the Vertiv logo are trademarks or registered trademarks of Vertiv Co. All other names and logos referred to
are trade names, trademarks or registered trademarks of their respective owners. While every precaution has been taken to ensure accuracy and
completeness herein, Vertiv Co. assumes no responsibility, and disclaims all liability, for damages resulting from use of this information or for any errors or
omissions. Specifications are subject to change without notice.
SL-25657_REV2_8-18
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