Emerson Liebert eXM User manual

Liebert®eXM™MBC™
User Manual–480V, 50-250kVA, 60Hz

i
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.6.1 Power Cable Connection Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.0 INSTALLATION DRAWINGS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
3.0 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
3.1 Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.2 Torque Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
FIGURES
Figure 1 Cabinet arrangement—Liebert eXM 480V UPS, battery cabinets, 480V maintenance bypass
cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 2 One-line diagram, dual-input, two-breaker Liebert 480V MBC, 50-250kVA system . . . . . . . . . . 10
Figure 3 Bend radius—Ground wires through bottom feed, 50-250kVA system . . . . . . . . . . . . . . . . . . . . . 10
Figure 4 One-line diagram, single-input, three-breaker Liebert 480V MBC, 50-250kVA. . . . . . . . . . . . . . 11
Figure 5 One-line diagram, dual input four-breaker Liebert 480V MBC, 50-250kVA . . . . . . . . . . . . . . . . 12
Figure 6 Main components—200mm Liebert eXM 480V MBC, two to four breakers, 50-100kVA
system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 7 Main components—300mm Liebert eXM 480V MBC, two to four breakers, 150-250kVA
system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 8 Outline drawing—200mm Liebert eXM 480V MBC, two to four breakers, 50-100kVA
system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 9 Outline drawing—300mm Liebert eXM 480V MBC, two to four breakers, 150-250kVA
system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 10 Terminal details—200mm Liebert eXM 480V MBC, four breakers, 50-100kVA system . . . . . . . 17
Figure 11 Terminal details—300mmLiebert eXM 480V MBC, four-breaker system, 150-250kVA . . . . . . . 18
Figure 12 Control wiring diagram, Liebert eXM 480V MBC, two breakers. . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 13 Control wiring diagram, Liebert eXM 480V MBC, three breakers . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 14 Control wiring diagram, Liebert eXM 480V MBC, four breakers . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 15 Liebert eXM 480V MBC, key interlock control wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 16 Solenoid key release unit, 200mm Liebert eXM 480V MBC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 17 Solenoid key release unit, 300mm Liebert eXM 480V MBC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

ii
TABLES
Table 1 Control wiring for Liebert eXM UPS to Liebert eXM MBC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 2 Breaker configuration—200mm Liebert eXM 480V MBC, two to four breakers, 50-100kVA
system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 3 Terminal block details—200mm Liebert eXM 480V MBC, two to four breakers, 50-100kVA
system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 4 Breaker configuration, 300mm Liebert eXM 480V MBC, two to four breakers, 150-250kVA
system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 5 Terminal block details—300mm Liebert eXM 480V MBC, two to four breakers, 150-250kVA
system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 6 Breaker configuration—200mm Liebert eXM 480V MBC, four-breaker system. . . . . . . . . . . . . . 17
Table 7 Terminal block details—200mm Liebert eXM 480V MBC, four-breaker system . . . . . . . . . . . . . 17
Table 8 Breaker configuration—300mm Liebert eXM 480V MBC, four-breaker system. . . . . . . . . . . . . . 18
Table 9 Terminal block details—300mm Liebert eXM 480V MBC, four- breaker system. . . . . . . . . . . . . 18
Table 10 Liebert eXM 480V MBC specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 11 Dimensions for Liebert eXM 480V UPS with Liebert eXM 480V MBC . . . . . . . . . . . . . . . . . . . . . 25
Table 12 Weights—Liebert eXM UPS, 150-250kVA, and 300mm Liebert eXM 480V MBC * . . . . . . . . . . . 26
Table 13 Liebert eXM 480V MBC input currents, single input, main . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 14 Liebert eXM 480V MBC input currents, dual input, rectifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 15 Liebert eXM 480V MBC input currents, dual input, bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 16 Weights—Liebert eXM UPS, 50-100kVA and 200mm Liebert eXM 480V MBC * . . . . . . . . . . . . 26
Table 17 Liebert eXM 480V MBC output currents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 18 Recommended lug sizes (compression type) M10, 3/8" bolt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 19 Recommended lug sizes (Compression Type) M12, 1/2" bolt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 20 Busbar torque for power wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 21 Terminal block torque with compression lugs for control wiring. . . . . . . . . . . . . . . . . . . . . . . . . . 28

Important Safety Instructions
1Liebert
®eXM™MBC™
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important instructions that should be followed during installation of your
Liebert eXM 480V Maintenance Bypass Cabinet MBC).
!
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 225-332 lb. (102-151 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 102 à 151 kg (de 225 à 232 lb).
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.

Important Safety Instructions
Liebert®eXM™MBC™2
Read this manual thoroughly before working with the Liebert eXM Maintenance Bypass Cabinet.
Retain this manual for use by installing personnel.
!
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.
!
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.

Mechanical Installation
3Liebert
®eXM™MBC™
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.
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.
!
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.

Mechanical Installation
Liebert®eXM™MBC™4
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.
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 Table 10).
1.4 Positioning
The cabinet is structurally designed to handle lifting from the base.
Access to the power terminals, auxiliary terminals blocks and power switches is from the 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 Table 12 for the weight of the Liebert eXM MBC 200mm and 300mm
models. Tables 11 through 13 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.
Handling the unit with straps is not authorized.
NOTE
The Liebert eXM MBC is suitable for mounting only on concrete and other noncombustible
surfaces.
!
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 225-332 lb. (102-151 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.

Mechanical Installation
5Liebert
®eXM™MBC™
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.
!
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 102 à 151 kg (de 225 à 232 lb).
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.

Mechanical Installation
Liebert®eXM™MBC™6
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 Tables 14 through 16,
follow local wiring practices and take into consideration the environmental conditions (temperature
and physical support media).
For cable entry locations, refer to Figures 8 and 9.
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.
!
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.

Mechanical Installation
7Liebert
®eXM™MBC™
Figure 1 Cabinet arrangement—Liebert eXM 480V UPS, battery cabinets, 480V maintenance bypass
cabinet
NOTE
The 200mm and 300mm maintenance bypass cabinets ship attached to the UPS.
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.

Mechanical Installation
Liebert®eXM™MBC™8
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.
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.
!
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 Emerson Network Power®Liebert
Services. 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 Emerson Network Power®Liebert
Services. 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.
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.

Mechanical Installation
9Liebert
®eXM™MBC™
4. Connect the AC input supply cables between the power distribution panel and the Maintenance
Bypass input supply busbars (A-B-C terminals) and tighten the connections to the proper torque
(see Table 20). Ensure correct phase rotation!
5. Connect the UPS Input
a. For two-breaker Liebert eXM MBC’s
i. 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 terminals) and between the
power distribution panel and the UPS rectifier input supply busbars (A-B-C terminals).
Tighten the connections to the proper torque. Ensure correct phase rotation!
ii. 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 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 Table 20). Ensure correct phase rotation!
6. Connect the system output power cables between the Liebert eXM MBC output (A-B-C terminals)
and the critical load and tighten the connections to the proper torque (see Table 20). 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
Table 20).
8. Replace the panels.
Notes
Refer to the Liebert eXM 480V UPS installation manual, SL-26102, for additional details about the
Liebert eXM 50-250kVA, UPS. The manual is available at the Liebert Web site: www.liebert.com
The following are guidelines only and are superseded by local regulations and codes of practice where
applicable.
• 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.
Table 1 Control wiring for Liebert eXM UPS to Liebert eXM MBC
From Liebert eXM
UPS Bypass Module
(X9 J23 and J26)
To Liebert eXM MBC
Terminal Block (TB1)
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

Installation Drawings
Liebert®eXM™MBC™10
2.0 INSTALLATION DRAWINGS
Figure 2 One-line diagram, dual-input, two-breaker Liebert 480V MBC, 50-250kVA system
Figure 3 Bend radius—Ground wires through bottom feed, 50-250kVA system
MAINTENANCE BYPASS CABINET
MBB
MIB
*Bypass
AC Input
3 Wire + GND
See Note 5
AC Output
480V
3 Wire + GND
Static Bypass
UPS CABINET
BATTERY
Output
Busbar
NOTES:
1. Install in accordance with national and local electrical codes.
2. Input and bypass must share the same single source.
3. Bypass and rectifier inputs and output cables must be
run in separate conduits.
4. Control wiring must be run in separate conduits.
5. Customer must supply shunt trip on bypass breaker with 120V coil.
BIB - Bypass Isolation Breaker
MBB - Maintenance Bypass Breaker
MIB - Maintenance Isolation Breaker
* External Overcurrent Protection by Others
Field-Supplied Wiring
*UPS
AC Input
3 Wire + GND
When attaching ground wires
from the bottom feed, connection must
be made to the ground busbar
as shown for required bend radius.
Ground Busbar

Installation Drawings
11 Liebert®eXM™MBC™
Figure 4 One-line diagram, single-input, three-breaker Liebert 480V MBC, 50-250kVA
MAINTENANCE BYPASS CABINET
MIBBIB
MBB
*Bypass
AC Input
3 Wire + GND
AC Output
480V
3 Wire + GND
Static Bypass
UPS CABINET
BATTERY
Output
Busbar
NOTES:
1. Install in accordance with national and local electrical codes.
2. Input and bypass must share the same single source.
3. Bypass and rectifier inputs and output cables must be
run in separate conduits.
4. Control wiring must be run in separate conduits.
BIB - Bypass Isolation Breaker
MBB - Maintenance Bypass Breaker
MIB - Maintenance Isolation Breaker
* External Overcurrent Protection by Others
Field-Supplied Wiring

Installation Drawings
Liebert®eXM™MBC™12
Figure 5 One-line diagram, dual input four-breaker Liebert 480V MBC, 50-250kVA
MAINTENANCE BYPASS CABINET
MIB
RIB
BIB
MBB
*Bypass
AC Input
3 Wire + GND
*Rectifier
AC Input
3 Wire + GND
AC Output
480V
3 Wire + GND
Static Bypass
UPS CABINET
BATTERY
Output
Busbar
NOTES:
1. Install in accordance with national and local electrical codes.
2. Input and bypass must share the same single source.
3. Bypass and rectifier inputs and output cables must be
run in separate conduits.
4. Control wiring must be run in separate conduits.
RIB - Rectifier Input Breaker
BIB - Bypass Isolation Breaker
MBB - Maintenance Bypass Breaker
MIB - Maintenance Isolation Breaker
* External Overcurrent Protection by Others
Field-Supplied Wiring

Installation Drawings
13 Liebert®eXM™MBC™
Figure 6 Main components—200mm Liebert eXM 480V MBC, two to four breakers, 50-100kVA system
Table 2 Breaker configuration—200mm Liebert eXM 480V MBC, two to four breakers, 50-100kVA
system
Liebert eXM MBC Breaker
Configuration Configured Breaker
2——MBBMIB
3 — BIB MBB MIB
4 RIB BIB MBB MIB
Table 3 Terminal block details—200mm Liebert eXM 480V MBC, two to four breakers, 50-100kVA
system
Terminal
Block
Single Input
System
Dual Input
System
TB2 Input Bypass
TB3 Output Output
TB4 — Rectifier
TB4
TB2
TB3
MBB
MIB
BIB
RIB
Ground
Busbar
LEFT SIDE
Panel Removed
RIGHT SIDE
Panel Removed
FRONT
Door Removed
EXM42005
Pg. 2, Rev. 0

Installation Drawings
Liebert®eXM™MBC™14
Figure 7 Main components—300mm Liebert eXM 480V MBC, two to four breakers, 150-250kVA system
Table 4 Breaker configuration, 300mm Liebert eXM 480V MBC, two to four breakers,
150-250kVA system
Liebert eXM MBC Breaker
Configuration Configured Breaker
2——MBBMIB
3 — BIB MBB MIB
4 RIB BIB MBB MIB
Table 5 Terminal block details—300mm Liebert eXM 480V MBC, two to four breakers,
150-250kVA system
Terminal
Block
Single Input
System
Dual Input
System
TB2 Input Bypass
TB3 Output Output
TB4 — Rectifier
TB4
TB2
TB3
MBB
MIB
BIB
RIB
Ground
Busbar
LEFT SIDE
Panel Removed
RIGHT SIDE
Panel Removed
FRONT
Door Removed
EXM42006
Pg. 2, Rev. 0

Installation Drawings
15 Liebert®eXM™MBC™
Figure 8 Outline drawing—200mm Liebert eXM 480V MBC, two to four breakers, 50-100kVA system
Leveler
DETAIL A
TOP BOTTOM
EXM42005
Pg. 1, Rev. 0FRONT RIGHT SIDE
7.8"
(200mm)
78.9"
(2000mm)
34.3"
(872mm)
Cable Entry Area
5.3" x 7.3"
(135mm x 185mm) Cable Entry Area
8.3" x 7.9"
(211mm x 201mm)
Cable Entry Area
5.7" x 8.3"
(145mm x 211mm)
4.7"
(119mm)
Front
8.2"
(208mm) 39.1 (993mm)
See
Detail A
NOTES:
1. All dimensions are in inches (mm).
2. 24" (610) minimum clearance above unit
for air exhaust; 36" (914) front access required for service.
3. Keep cabinet within 15 degrees of vertical.
4. Top and bottom cable entry available through removable
access plates. Remove, punch to suit conduit size
and replace.
5. Unit bottom is structurally adequate for forklift handling.
6. Control wiring and power wring must be run in
separate conduits.
7. Copper cables only are recommended.
8. All wiring is to be in accordance with national and local
electrical codes.

Installation Drawings
Liebert®eXM™MBC™16
Figure 9 Outline drawing—300mm Liebert eXM 480V MBC, two to four breakers, 150-250kVA system
NOTES:
1. All dimensions are in inches (mm).
2. 24" (610) minimum clearance above unit
for air exhaust; 36" (914) front access required for service.
3. Keep cabinet within 15 degrees of vertical.
4. Top and bottom cable entry available through removable
access plates. Remove, punch to suit conduit size
and replace.
5. Unit bottom is structurally adequate for forklift handling.
6. Control wiring and power wring must be run in
separate conduits.
7. Copper cables only are recommended.
8. All wiring is to be in accordance with national and local
electrical codes.
Leveler
DETAIL A
TOP BOTTOM
EXM42006
Pg. 1, Rev. 0FRONT RIGHT SIDE
11.8"
(300mm)
78.9"
(2000mm)
34.3"
(872mm)
Cable Entry Area
10" x 11.8"
(254mm x 300mm)
Cable Entry Area
10" x 14.8"
(254mm x 376mm)
Cable Entry Area
8.3" x 7.9"
(211mm x 201mm)
8.6" (218mm)
Front
12."
(308mm) 39.1 (993mm)
See
Detail A