Vertiv Liebert EXM MBC User Manual

Liebert®

EXM™ MBC™

User Manual—10-200kVA, 208/120V and 220/127V, 60Hz

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.

TABLE OF CONTENTS

IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

SAVE THESE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.0 MECHANICAL INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.2 Preliminary Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.3 Environmental Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.3.1 Room . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.3.2 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.4 Positioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.4.1 Moving the Cabinets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.4.2 Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.4.3 Floor Installation/Anchoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.5 Cable Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.6 Power Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.6.1 Power Cable Connection Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.0 INSTALLATION DRAWINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.0 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

3.1 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

3.2 Torque Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

FIGURES

Figure 1 Cabinet arrangement—Liebert EXM UPS, battery cabinets, maintenance bypass cab-

inet6

Figure 2 One-line diagram, single-input Liebert EXM 10-40kVA UPS with three-breaker Lieb-

ert EXM

MBC and input/output transformer cabinet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 3 One-line diagram, single-input Liebert EXM 10-200kVA UPS with three-breaker Lieb-

ert

EXM MBC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 4 One-line diagram, dual-input Liebert EXM 10-100kVA with two-breaker Liebert MBC

12

Figure 5 One-line diagram, dual-input Liebert EXM 10-100kVA UPS with four-breaker Liebert

EXM MBC

and input isolation transformer cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 6 One-line diagram, dual-input Liebert EXM 10-200kVA UPS with three-breaker Lieb-

ert

EXM MBC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 7 One-line diagram, dual input Liebert EXM 10-200kVA with four-breaker Liebert MBC

15
Figure 8 Bend radius—Neutral and ground wires through bottom feed, 10-40kVA system . . 15
Figure 9 Main components—200mm Liebert EXM MBC, two to four breakers, 10-40kVA sys-

tem16

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Figure 10 Main components—300mm Liebert EXM MBC, two to four breakers, 60-100kVA sys-

tem17
Figure 11 Main components—600mm Liebert EXM MBC, two breakers, 120-200kVA system 18
Figure 12 Main components—600mm Liebert EXM MBC, three to four breakers, 120-160kVA

system18
Figure 13 Main components—800mm Liebert EXM MBC, three or four breakers, 160-200kVA

system19
Figure 14 Outline drawing—200mm Liebert EXM MBC, two to four breakers, 10-40kVA system

20
Figure 15 Outline drawing—300mm Liebert EXM MBC, two to four breakers, 60-100kVA sys-

tem21

Figure 16 Outline drawing—600mm Liebert EXM MBC 120-200kVA system . . . . . . . . . . . . . . . . .22

Figure 17 Outline drawing—800mm Liebert EXM MBC 160-200kVA system . . . . . . . . . . . . . . . . . 23

Figure 18 Terminal details—200mm Liebert EXM MBC, two to four breakers, 10-40kVA system

24
Figure 19 Terminal details—300mm Liebert EXM MBC, two to four breakers, 60-100kVA sys-

tem25
Figure 20 Terminal details—600mm Liebert EXM MBC, two breakers, 120-200kVA system . .26
Figure 21 Terminal details—600mm Liebert EXM MBC, three breakers, 120-160kVA system. 27
Figure 22 Terminal details—600mm Liebert EXM MBC, four breakers, 120-160kVA system . .28
Figure 23 Terminal details—800mm Liebert EXM MBC, three breakers, 160-200kVA system 29
Figure 24 Terminal details—800mm Liebert EXM MBC, four breakers, 160-200kVA system. .30

Figure 25 Control wiring diagram, Liebert EXM MBC, two to four breakers, with interlock . . . . 31

Figure 26 Solenoid key release unit, 200mm Liebert EXM MBC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Figure 27 Solenoid key release unit, 300mm Liebert EXM MBC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Figure 28 Solenoid key release unit, 600mm Liebert EXM MBC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Figure 29 Solenoid key release unit, 800mm Liebert EXM MBC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

TAB LES

Table 1 Control wiring for Liebert EXM UPS to Liebert EXM MBC. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Table 2 Breaker configuration—200mm Liebert EXM MBC two to four breakers, 10-40kVA

system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Table 3 Terminal block details—200mm Liebert EXM MBC, two to four breakers, 10-40kVA

system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Table 4 Breaker configuration, 300mm Liebert EXM MBC, two to four breakers, 60-100kVA

system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Table 5 Terminal block details—300mm Liebert EXM MBC, two to four breakers, 60-100kVA

system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Table 6 Breaker configuration—200mm Liebert EXM MBC, two to four breakers, 10-40kVA

system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Table 7 Breaker configuration—300mm Liebert EXM MBC, two to four breakers, 60-100kVA

system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Table 8 Terminal block details—300mm Liebert EXM MBC, two to four breakers, 60-100kVA

system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Table 9 Terminal block details—200mm Liebert EXM MBC, two to four breakers, 10-40kVA

system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Table 10 Liebert EXM MBC specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

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Table 11 Dimensions for Liebert EXM UPS with Liebert EXM MBC . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Table 12 Weights—Liebert EXM UPS, 10-40kVA, and 200mm Liebert EXM MBC . . . . . . . . . . . .36

Table 13 Weights—Liebert EXM UPS, 60-100kVA, and 300mm Liebert EXM MBC . . . . . . . . . .36

Table 14 Additional weight for Liebert EXM 10-40kVA UPS with internal batteries *. . . . . . . . .36

Table 15 Liebert EXM MBC input currents, single input, main . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Table 16 Liebert EXM MBC input currents, dual input, rectifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Table 17 Liebert EXM MBC input currents, dual input, bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Table 18 Recommended lug sizes (compression type) M10, 3/8" bolt . . . . . . . . . . . . . . . . . . . . . . . 40

Table 19 Liebert EXM MBC output currents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Table 20 Recommended lug sizes (Compression Type) M12, 1/2" bolt . . . . . . . . . . . . . . . . . . . . . . . . 41

Table 21 Busbar torque for power wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Table 22 Terminal block torque with compression lugs for control wiring . . . . . . . . . . . . . . . . . . . . 41

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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 Maintenance Bypass Cabinet MBC).

Read this manual thoroughly before working with the Maintenance Bypass Cabinet. Retain this
manual for use by installing personnel.

WARNING

Risk of moving heavy units and tipping hazard. Can cause equipment damage, injury and
death.

Exercise extreme care when handling cabinets to avoid equipment damage or injury to
personnel. The Liebert EXM MBC’s weight ranges from 198 to 700 lb. (89.9 to 317.5 kg).
Locate center of gravity symbols and determine unit weight before handling each
cabinet. Test lift and balance the cabinets before transporting. Maintain minimum tilt from
vertical at all times.

Slots at the base of the cabinets are intended for forklift use. Base slots will support the unit
only if the forks are completely beneath the unit.

In case of fire involving electrical equipment, use only carbon dioxide fire extinguishers or
those approved for use in fighting electrical fires.

Extreme caution is required when performing maintenance.
Be constantly aware that the system contains high DC as well as AC voltages.
Check for voltage with both AC and DC voltmeters prior to making contact.

AVERTISSEMENT

Le centre de gravité élevé des appareils présente un risque de renversement lors des
déplacements pouvant entraîner des dommages matériels, des blessures et même la mort.
Faites preuve d’une extrême prudence lors de la manutention des armoires afin d’éviter de
les endommager ou de blesser le personnel. Les armoires de dérivation d’entretien EXM de
Liebert pèsent de 198 à 700 lb (de 89.9 à 317.5 kg).

Identifiez les symboles de centre de gravité et déterminez le poids de l’appareil avant
de manipuler chaque armoire. Testez le levage et l’équilibre des armoires avant de
transporter l’appareil. Maintenez en tout temps l’inclinaison verticale minimale.

Les fentes situées à la base des armoires sont conçues pour utiliser le chariot élévateur.
Les fentes situées à la base peuvent soutenir le système seulement si les fourches se
trouvent complètement sous le système.
En cas d’incendie associé à du matériel électrique, n’utilisez que des extincteurs à dioxyde
de carbone ou homologués pour la lutte contre les incendies d’origine électrique.

Les opérations d’entretien requièrent une extrême prudence.
Soyez toujours conscient du fait que le système contient des tensions c.c. et c.a. élevées.
Vérifiez les tensions avec des voltmètres c.a. et c.c. avant d’établir tout contact.

Vertiv™|Liebert® EXM™ MBC Installation Manual | 1

.

WARNING

Risk of arc flash and electric shock. Can cause equipment damage, injury and death.
Under typical operation and with all doors closed, only normal safety precautions are

necessary. The area around the system should be kept free of puddles of water, excess
moisture and debris.
Special safety precautions are required for procedures involving handling, installation and
maintenance of the Maintenance Bypass Cabinet. Observe all safety precautions in this
manual before handling or installing the Maintenance Bypass Cabinet. Observe all
precautions in the Operation and Maintenance Manual, before as well as during
performance of all maintenance procedures.
This equipment contains circuits that are energized with high voltage. Only test equipment
designed for troubleshooting should be used. This is particularly true for oscilloscopes.
Always check with an AC and DC voltmeter to ensure safety before making contact or
using tools. Even when the power is turned Off, dangerously high potential electric charges
may exist.
All power and control wiring should be installed by a qualified electrician. All power and
control wiring must comply with the NEC and applicable local codes.
ONLY properly trained and qualified personnel should perform maintenance on the
Maintenance Bypass Cabinet. When performing maintenance with any part of the equipment
under power, service personnel and test equipment should be standing on rubber mats. The
service personnel should wear insulating shoes for isolation from direct contact with the floor
ground.
One person should never work alone, even if all power is removed from the equipment. A
second person should be standing by to assist and summon help in case of an accident.

Vertiv™|Liebert® EXM™ MBC Installation Manual | 2

AVERTISSEMENT

Risque d’arc ou de décharge électrique pouvant entraîner des dommages matériels, des
blessures et même la mort.

Les précautions de sécurité habituelles suffisent lorsque le système est en mode de
fonctionnement normal et que toutes les portes sont fermées. La zone entourant le
système doit être exempte de flaques d’eau, d’humidité excessive et de débris.

Des précautions de sécurité spéciales sont requises pour les procédures associées à la
manutention, à l’installation et à l’entretien de l’armoire de dérivation d’entretien. Observez
toutes les précautions de sécurité décrites dans le présent manuel avant de manipuler ou
d’installer l’armoire de dérivation d’entretien. Observez également toutes les précautions
décrites dans le manuel d’utilisation et d’entretien, avant et pendant toutes les procédures
d’entretien.

Cet équipement comporte des circuits à haute tension. Seuls des équipements d’essai
conçus pour le dépannage doivent être utilisés. Cette mise en garde couvre notamment les
oscilloscopes. Utilisez toujours un voltmètre c.a. et c.c. pour vérifier les tensions avant
d’établir un contact ou d’utiliser des appareils. Des tensions dangereusement élevées
peuvent demeurer dans le système même une fois l’alimentation coupée.
Tous les câbles d’alimentation et de contrôle doivent être installés par un électricien
qualifié. Tous les câbles d’alimentation et de contrôle doivent être conformes au Code
national de l’électricité des États-Unis (NEC) et ainsi qu’aux codes locaux en vigueur.

L’entretien de l’armoire de dérivation d’entretien ne doit être confié qu’à des professionnels
qualifiés et dûment formés. Les responsables de l’entretien et l’équipement d’essai doivent
reposer sur des tapis de caoutchouc lors de toute intervention sur une pièce d’équipement
sous tension. Les responsables de l’entretien doivent porter des chaussures isolantes pour
prévenir tout contact direct avec le plancher.

Une personne ne devrait jamais travailler seule, même si toute l’alimentation de
l’équipement est coupée. Une deuxième personne devrait toujours être présente pour
porter assistance ou chercher de l’aide en cas d’accident.

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1.0 MECHANICAL INSTALLATION

1.1 Introduction

This section describes the requirements that must be taken into account when planning the
positioning and cabling of the Liebert EXM MBC.

This chapter is a guide to general procedures and practices that should be observed by the
installing engineer. The particular conditions of each site will determine the applicability of such
procedures.

WARNING

Risk of arc flash and electric shock. Can cause equipment damage, injury and death.
Installation must be performed only by properly trained and qualified personnel wearing

appropriate safety clothing.
Eye protection should be worn to prevent injury from accidental electrical arcs. Remove
rings, watches and all other metal objects. Only use tools with insulated handles. Wear
rubber gloves.

AVERTISSEMENT

Risque d’arc ou de décharge électrique pouvant entraîner des dommages matériels, des
blessures et même la mort.

L’installation ne doit être confiée qu’à des professionnels qualifiés et dûment formés
portant des vêtements de sécurité adéquats.

Des lunettes de sécurité doivent être portées afin de prévenir les blessures en cas d’arcs
accidentels. Retirez montre, bagues et tout autre objet métallique. Utilisez uniquement des
outils dont le manche est isolé. Portez des gants de protection en caoutchouc.

NOTICE

Risk of improper installation. Can cause equipment damage and void warranty.
The Liebert EXM MBC should be installed by a qualified engineer in accordance with the information

contained in this chapter
All equipment not referred to in this manual is shipped with details of its own mechanical and electrical

installation.
Do not apply electrical power to the UPS equipment before the arrival of the commissioning engineer.

1.2 Preliminary Checks

Before installing the Liebert EXM MBC, carry out the following preliminary checks:

• Visually examine the equipment for transit damage, both internally and externally. Report any damage to
the shipper immediately.

• Verify that the correct equipment is being installed. The equipment supplied has an identification tag on
the back of the main door reporting: the type, size and main calibration parameters of the UPS.

• Verify that the room satisfies the environmental conditions stipulated in the equipment specifications,
paying particular attention to the ambient temperature and air exchange system.

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1.3 Environmental Considerations

1.3.1 Room

The Liebert EXM MBC is intended for indoor installation and should be located in a cool, dry,
clean-air environment with adequate ventilation to keep the ambient temperature within the
specified operating range (see 3.0 - Specifications).

All models of the Liebert EXM MBC are convection-cooled. To permit air to enter and exit and
prevent overheating or malfunctioning, do not cover the ventilation openings.

When bottom entry is used, the conduit plate can be removed and punched and replaced. The
bottom conduit plate must be replaced for proper airflow. If necessary to cool the room, install a
system of room extractor fans.

NOTE

The Liebert EXM MBC is suitable for mounting only on concrete and other noncombustible
surfaces.

1.3.2 Storage

Should the equipment not be installed immediately, it must be stored in a room for protection
against excessive humidity and or heat sources (see Tab le 1 0).

1.4 Positioning

The cabinet is structurally designed to handle lifting from the base.
Access to the power terminals, auxiliary terminals blocks and power switches is from the top and

sides.
The top and side removable panels are secured to the chassis by screws. The side panel can be

removed for access to the power connections bars, auxiliary terminal blocks and power isolators.

1.4.1 Moving the Cabinets

The route to be travelled between the point of arrival and the unit’s position must be planned to
make sure that all passages are wide enough for the unit and that floors are capable of supporting
its weight (for instance, check that doorways, lifts, ramps, etc. are adequate and that there are no
impassable corners or changes in the level of corridors).

Ensure that the cabinet weight is within the designated surface weight loading (kg/cm2) of any
handling equipment. See Ta bl e 12 for the weight of the Liebert EXM MBC 200mm, 300mm,
600mm, and 800mm models. Tab le s 11 through 14 provide detailed dimension and weight
information for the Liebert EXM UPS and Liebert EXM MBC when they are bolted together and
shipped as a system.

Ensure that any lifting equipment used in moving the cabinet has sufficient lifting capacity.
The Liebert EXM MBC can be handled by means of a fork lift or similar equipment. For operations

with a fork lift, refer to installation drawings in 2.0 - Installation Drawings.
Because the weight distribution in the cabinet is uneven, use extreme care during handling and

transporting.
When moving the unit by forklift, care must be taken to protect the panels. Do not exceed a

15-degree tilt with the forklift.

Vertiv™|Liebert® EXM™ MBC Installation Manual | 5

Handling the unit with straps is not authorized.

WARNING

Risk of moving heavy units and tipping hazard. Can cause equipment damage, injury and
death.

Exercise extreme care when handling cabinets to avoid equipment damage or injury to
personnel. The Liebert EXM MBC’s weight ranges from 198 to 700 lb. (89.8 to 317.5 kg).

Locate center of gravity symbols and determine unit weight before handling each
cabinet. Test lift and balance the cabinets before transporting. Maintain minimum tilt from
vertical at all times.

AVERTISSEMENT

Le centre de gravité élevé des appareils présente un risque de renversement lors des
déplacements pouvant entraîner des dommages matériels, des blessures et même la mort.
Faites preuve d’une extrême prudence lors de la manutention des armoires afin d’éviter de
les endommager ou de blesser le personnel. Les armoires de dérivation d’entretien EXM de
Liebert pèsent de 198 à 700 lb (de 89.8 à 317.5 kg).
Identifiez les symboles de centre de gravité et déterminez le poids de l’appareil avant de
manipuler chaque armoire. Testez le levage et l’équilibre des armoires avant de transporter
l’appareil. Maintenez en tout temps l’inclinaison verticale minimale.

1.4.2 Clearances

Liebert EXM MBC’s have no ventilation grilles at either side or at the rear. Clearance around the
front of the equipment should be sufficient to enable free passage of personnel with the doors
fully opened. It is important to leave a distance of 24" (610mm) between the top of the cabinet and
any overhead obstacles to permit adequate circulation of air coming out of the unit.

1.4.3 Floor Installation/Anchoring

The installation diagrams in 2.0 - Installation Drawings of this manual identify the location of the
holes in the base plate through which the equipment can be bolted to the floor. If the equipment
is to be located on a raised floor it should be mounted on a pedestal suitably designed to accept
the equipment point loading.

1.5 Cable Entry

Cables can enter the Liebert EXM MBC from the bottom or top.

1.6 Power Cables

The Liebert EXM MBC requires both power and control cabling once it has been mechanically
installed. All control cables must be separate from the power cables. Run control cables in metal
conduits or metal ducts that are electrically bonded to the cabinets they are connected to.

The cable design must comply with the voltages and currents provided in Ta bl es 1 5 through 17,
follow local wiring practices and take into consideration the environmental conditions
(temperature and physical support media).

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For cable entry locations, refer to Figures 14 and 15.

WARNING

Risk of electric shock. Can cause equipment damage, injury and death.
Before cabling up the cabinet, ensure that you are aware of the location and operation of
the external isolators that connect the input/bypass supply.
Check that these supplies are electrically isolated, and post any necessary warning signs to
prevent their inadvertent operation.

AVERTISSEMENT

Risque de décharge électrique pouvant entraîner des dommages matériels, des blessures
et même la mort.

Avant de procéder au câblage de l’armoire, assurez-vous que vous êtes au courant de
l’emplacement et du fonctionnement des isolateurs externes qui raccordent l’alimentation
d’entrée ou de dérivation.

Vérifiez que ces raccords sont isolés électriquement et installez tous les panneaux
d’avertissement nécessaires pour empêcher leur utilisation accidentelle.

The following are guidelines only and are superseded by local regulations and codes of practice
where applicable:

• Take special care when determining the size of the neutral cable (grounded conductor), because current
circulating on the neutral cable may be greater than nominal current in the case of nonlinear loads.

• The grounding conductor should be sized according to local or NEC codes, cable lengths, type of
protection, etc. The grounding cable connecting the UPS to the main ground system must follow the most
direct route possible.

• Consider using smaller, paralleled cables for heavy currents as a way of easing installation.

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Figure 1 Cabinet arrangement—Liebert EXM UPS, battery cabinets, maintenance bypass cabinet

Liebert

EXM

UPS

Liebert

EXM

UPS

Maintenance

Bypass
Cabinet

(Matching)

Battery

Cabinet

(Matching)

Liebert

EXM

UPS

Maintenance

Bypass
Cabinet

(Matching)

Additional

Battery

Cabinet(s)

(Matching)

If a maintenance bypass
cabinet is used, it must be
installed on the right side of
the Liebert EXM UPS.

NOTE

The 200mm and 300mm maintenance bypass cabinets ship attached to the UPS.
The 600mm and 800mm maintenance bypass cabinets ship separately from the UPS.

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1.6.1 Power Cable Connection Procedure

The system input, UPS bypass, UPS output and system output cables (all require lug type
terminations) are connected to power blocks behind the power isolator switches as shown in

2.0 - Installation Drawings. These are accessible when the side or top panel is removed.

Equipment Ground

The equipment ground busbar is near the input and output power supply connections as shown
in 2.0 - Installation Drawings. The grounding conductor must be connected to the ground
busbar.

All cabinets and cable trunking should be grounded in accordance with local regulations.

WARNING

Risk of electric shock. Can cause equipment damage, injury and death.
Failure to follow adequate grounding procedures can result in electric shock hazard to

personnel and the risk of fire, should a ground fault occur.

AVERTISSEMENT

Risque de décharge électrique pouvant entraîner des dommages matériels, des blessures
et même la mort.

Le non-respect des procédures de mise à la terre peut entraîner des risques
d’électrocution du personnel, ou des risques d’incendie en cas de défectuosité de la mise à
la terre.

WARNING

Risk of electric shock. Can cause equipment damage, injury and death.
The operations described in this section must be performed by authorized electricians or
properly trained and qualified technical personnel wearing adequate safety clothing, eye
protection and gloves.
If you have any difficulties, do not hesitate to contact Vertiv. See the back page of this
manual for contact information.

AVERTISSEMENT

Risque de décharge électrique pouvant entraîner des dommages matériels, des blessures
et même la mort.

Toutes les opérations décrites dans cette section ne doivent être effectuées que par des
électriciens ou des techniciens professionnels dûment formés et qualifiés portant gants,
lunettes et vêtements de protection adéquats.

En cas de problème, n’hésitez pas à communiquer avec Vertiv. Pour obtenir les
renseignements de contact, consultez la dernière page de ce manuel.

NOTE

Proper grounding considerably reduces problems in systems caused by electromagnetic
interference.

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Once the equipment has been finally positioned and secured, connect the power cables as
described in the following procedure.

Refer to the appropriate cable connection drawing in 2.0 - Installation Drawings.

1. Verify that the bypass equipment is isolated from its external power source and all the power isolators are

open. Check that these supplies are electrically isolated and post any necessary warning signs to prevent
their inadvertent operation.

2. Remove the panels.

3. Connect the ground and any necessary main bonding jumper to the equipment ground busbar.

NOTE

The grounding and neutral bonding arrangement must be in accordance with local and national
codes of practice.

NOTE

Care must be taken when routing power cables. Ensure that the cables do not touch other
busbars.

4. Connect the AC input supply cables between the power distribution panel and the Maintenance Bypass

input supply busbars (A-B-C or A-B-C-N terminals) and tighten the connections to the proper torque (see
Ta bl e 2 1). Ensure correct phase rotation!

5. Connect the UPS Input

a. For two-breaker Liebert EXM MBC’s

1. If the system is a two-input type, connect the AC input supply cables between the Liebert EXM MBC

and the UPS bypass input supply busbars (A-B-C or A-B-C-N terminals) and between the power
distribution panel and the UPS rectifier input supply busbars (A-B-C or A-B-C-N terminals). Tighten the
connections to the proper torque. Ensure correct phase rotation!

2. If the system is a single-input type, connect the AC input supply cables between the Liebert EXM MBC

and the UPS bypass input supply busbars (A-B-C or A-B-C-N terminals) and connect AC jumper
connectors between UPS bypass input supply busbars and UPS rectifier input supply busbars (A-B-C
terminals). Tighten the connections to the proper torque (see Tab le 2 1). Ensure correct phase rotation!

6. Connect the system output power cables between the Liebert EXM MBC output (A-B-C or A-B-C-N

terminals) and the critical load and tighten the connections to the proper torque (see Tab le 2 1). Ensure
correct phase rotation!

7. Connect the control wiring from the Liebert EXM MBC terminal block TB1 to the Liebert EXM UPS Bypass

Module (X9 J23 and J26). Tighten the connections to the proper torque (see Ta bl e 2 1).

8. Replace the panels.

Table 1 Control wiring for Liebert EXM UPS to Liebert EXM MBC

From Liebert EXM

UPS Bypass Module

(X9 J23 and J26)

J26-15 TB1-6

J26-13 TB1-5

J26-11 TB1-4

J26-9 TB1-3

J23-3 TB1-9

J23-4 TB1-11

J23-6 TB1-12

To Liebert EXM MBC
Terminal Block (TB1)

Notes

Refer to the Liebert EXM UPS installation manual, SL-25648, SL-25650, or SL-26100, for
additional details about the Liebert EXM 10-40kVA, 60-100kVA, and 120-200kVA UPS's. The
manual is available at the Liebert Web site: www.liebert.com

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The following are guidelines only and are superseded by local regulations and codes of practice
where applicable.

• Take special care when determining the size of the neutral cable, because current circulating on the neutral
cable may be greater than nominal current in the case of non-linear loads.

• The ground conductor should be sized according to local or NEC codes, cable lengths, type of protection,
etc. The ground cable connecting the UPS to the main ground system must follow the most direct route
possible.

• Consideration should be given to the use of smaller, paralleled cables for heavy currents, as a way to ease
installation.

• In most installations, the load equipment is connected to a distribution network of individually protected
busbars fed by the Liebert EXM MBC output rather than being connected directly to the Liebert EXM MBC
itself. Where this is the case, the Liebert EXM MBC output cables can be rated to suit the individual
distribution network demands rather than being fully load-rated.

• When laying the power cables, do not form coils to avoid increasing formation of electromagnetic
interference.

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