Emerson NXL UPS Systems User Manual
Liebert® NXL™ Battery System
Installation Manual
AC Power
For Business-Critical Continuity™
BATTERY CABINET PRECAUTIONS
The following warning applies to all battery cabinets supplied with UPS systems. Additional
warnings and cautions applicable to battery cabinets may be found in Important Safety
Instructions beginning on page 1.
WARNING
!
Internal battery strapping must be verified prior to moving a battery cabinet (after initial
installation).
• Battery cabinets contain non-spillable batteries.
• Keep units upright.
• Do not stack.
• Do not tilt.
Failure to heed this warning could result in smoke, fire or electric hazard.
Call 1-800-LIEBERT prior to moving battery cabinets (after initial installation).
CONTACTING LIEBERT FOR SUPPORT
To contact the Liebert Services section of Emerson Network Power for information or repair service in
the United States, call 1-800-LIEBERT (1-800-543-2378). Liebert Services offers a complete range of
startup services, repair services, preventive maintenance plans and service contracts.
For repair or maintenance service outside the 48 contiguous United States, contact Liebert Services,
if available in your area.
For LGS to assist you promptly, have the following information available:
Part Numbers:
Serial Numbers:
Rating:
Date Purchased:
Date Installed:
Location:
Battery Voltage:
Battery Reserve Time:
Product Warranty Registration
To register for warranty protection, visit the Service and Support section of our Web site at:
www.liebert.com
Click on Product Registration and fill out the form.
TABLE OF CONTENTS
IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.0 MECHANICAL INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Preliminary Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Environmental Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3.1 Battery Room . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3.2 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.4 Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4.1 Moving the Cabinets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4.2 Clearances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.3 Raised Floor Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.5 System Composition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.0 BATTERY INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2.1 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Cable Entry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.4 Power Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.4.1 Connected System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.4.2 Stand-Alone System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.4.3 Attached/Detached System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.4.4 MBD voltage sense leads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.4.5 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.5 Control Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.6 Alber Monitoring System—Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.7 External Battery Room Temperature Sensor—Optional. . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.0 INSTALLATION DRAWINGS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.0 S
PECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
FIGURES
Figure 1 Shipping bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2 Battery cabinets connected, attached to UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 3 Battery cabinets connected, detached from UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 4 Battery cabinets connected, with Module Battery Disconnect, attached to UPS . . . . . . . . . . . . . . 8
Figure 5 Battery cabinets connected, with Module Battery Disconnect, detached from UPS. . . . . . . . . . . . 8
Figure 6 Battery cabinets connected, detached from Module Battery Disconnect, detached from UPS . . . 9
Figure 7 Stand-alone battery cabinets, with Module Battery Disconnect, detached from UPS . . . . . . . . . . 9
Figure 8 Stand-alone battery cabinets, no Module Battery Disconnect, detached from UPS . . . . . . . . . . . 10
Figure 9 Wiring external interface board in UPS to battery interface board in battery cabinet . . . . . . . . 12
Figure 10 Control cable layout—Liebert NXL UPS to Liebert NXL Battery Cabinet . . . . . . . . . . . . . . . . . . 13
Figure 11 Battery temperature sensor control connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 12 Outline drawing, Liebert Battery Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 13 Main components, Liebert Battery Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 14 Terminal details, Liebert Battery Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
i
Figure 15 Outline drawing, 250-400kVA, Liebert Module Battery Disconnect . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 16 Terminal detail drawing, Liebert Module Battery Disconnect. . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 17 Outline drawing, 500-750kVA, Liebert Module Battery Disconnect . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 18 Wide junction cabinet terminal wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 19 Liebert NXL Narrow Junction Cabinet—terminal detail and outline drawing . . . . . . . . . . . . . . 22
Figure 20 Liebert NXL Battery Cabinet control wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 21 Liebert NXL Module Battery Disconnect control wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 22 Voltage sense wire harness top input and bottom input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 23 Liebert NXL Module Battery Disconnect CAN wire harness connection . . . . . . . . . . . . . . . . . . . 26
Figure 24 Attached battery cabinet connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 25 Ground strap location for connected cabinets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 26 Battery cabinet interconnection wiring to 250-400kVA UPS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 27 Liebert NXL Module Battery Disconnect interconnect wiring to 250-400kVA UPS. . . . . . . . . . . 29
Figure 28 Liebert NXL Battery Cabinet interconnect wiring to Liebert NXL Junction Cabinet . . . . . . . . . 30
Figure 29 Liebert NXL UPS to Liebert NXL Module Battery Disconnect to wide Liebert NXL
Junction Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 30 Liebert NXL UPS to Liebert NXL Module Battery Disconnect to Liebert NXL
Battery Cabinet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 31 Alber battery monitoring connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 32 Battery Interface Board wiring to multiple battery cabinets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 33 Alber battery monitoring assembly diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 34 Alber Battery Monitoring transformer location and battery configuration. . . . . . . . . . . . . . . . . . 36
TABLES
Table 1 Liebert-supplied interconnect wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 2 Liebert-supplied interconnect wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 3 Liebert-supplied interconnect wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 4 Liebert-supplied interconnect wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 5 Liebert-supplied interconnect wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 6 Alber battery monitoring assembly connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 7 Liebert NXL Battery Cabinet specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 8 Liebert NXL Module Battery Disconnect Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 9 Liebert NXL Junction Cabinet specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table 10 Alber battery monitoring option specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table 11 Currents for Liebert NXL Module Battery Disconnect Cabinet. . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table 12 Battery cabinet internal breaker selection based on 5 min EOD, amps . . . . . . . . . . . . . . . . . . . . 40
Table 13 Liebert NXL Battery Cabinet approximate weights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 14 Approximate weights, Liebert NXL Module Battery Disconnect and Liebert NXL
Junction Cabinets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 15 Recommended conduit and cable sizes for Liebert NXL Module Battery Disconnect . . . . . . . . . 41
Table 16 Battery torque values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 17 Torque specifications, unless otherwise labeled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
ii
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important instructions that should be followed during installation of your
Liebert NXL
to the sections that apply to your installation, before working with the battery system. Retain this
manual for use by installing personnel.
!
™
battery cabinet and accessories. Read this manual thoroughly, paying special attention
WARNING
Risk of electrical shock. Can cause personal injury or death.
Special safety precautions are required for procedures involving handling, installation and
maintenance of the UPS system. Only properly trained and qualified personnel wearing
appropriate personal protective equipment should be involved in installing the Liebert NXL
Battery system or preparing the system for installation.
Special care must be taken when working with the batteries associated with this equipment.
When connected together, the battery terminal voltage will exceed 400VDC and is potentially
lethal. Be constantly aware that the battery system contains high DC as well as AC voltages.
Check for voltage with AC and DC voltmeters before making contact.
Observe all DC safety precautions before working on or near the DC system.
Follow all battery safety precautions when installing, charging or servicing batteries. In
addition to the hazard of electric shock, gas produced by batteries can be explosive and
sulfuric acid can cause severe burns.
The following precautions must be observed when working on batteries:
• Remove watches, rings and other metal objects.
• Use tools with insulated handles.
• Wear rubber gloves and boots.
• Do not lay tools or metal parts on top of batteries.
• Disconnect charging source prior to connecting or disconnecting battery terminals.
• Determine whether the battery is grounded. If it is grounded, remove source of ground.
Contact with any part of a grounded battery can result in electrical shock. The likelihood of
such shock will be reduced if such grounds are removed during installation and maintenance.
If a battery leaks electrolyte, or is otherwise physically damaged, it must be replaced, stored
in a container resistant to sulfuric acid and disposed of in accordance with local regulations.
If electrolyte comes into contact with the skin, the affected area should be washed
immediately with water.
WA R N I N G
!
Risk of electric shock, explosive reaction, hazardous chemicals and fire. Can cause equipment
damage, personal injury and death.
Lead-acid batteries contain hazardous materials. Batteries must be handled, transported and
recycled or discarded in accordance with federal, state and local regulations. Because lead is a
toxic substance, lead-acid batteries must be recycled rather than discarded.
Do not dispose of a battery in a fire. The battery may explode.
Do not open or mutilate the battery or batteries. Released electrolyte is harmful to the skin
and eyes. It is toxic.
WARNING
!
Risk of electric shock. Can cause personal injury or death.
In case of fire involving electrical equipment, use only carbon dioxide fire extinguishers or
those approved for use in fighting electrical fires.
1
WARNING
!
Risk of heavy unit falling over. Can cause equipment damage, injury or death.
Exercise extreme care when handling battery cabinets to avoid equipment damage or injury
to personnel. The battery system cabinets weigh from 3760 to 5750 lb. (1706 to 2608kg).
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.
WARNING
!
Risk of electric shock. Can cause equipment damage, personal injury or death.
The area around the battery system must be kept free of puddles of water, excess moisture
and debris.
Observe all precautions in the Operation and Maintenance Manual, SL 25425, before as well
as during all installation and maintenance procedures. Observe all battery safety precautions
before working on or near the battery.
This equipment contains several 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 at the capacitor banks and at the batteries.
All power and control wiring must be installed by a properly trained and qualified electrician.
All power and control wiring must comply with the NEC and applicable local codes.
When performing maintenance with any part of the equipment under power, service
personnel and test equipment must be standing on rubber mats. The service personnel must
wear insulating shoes for isolation from direct contact with the floor (earth ground).
One person should never work alone, even if all power is disconnected from the equipment. A
second person should be standing by to assist and to summon help in case of an accident.
NOTE
Liebert Corporation neither recommends nor knowingly sells this product for use with life
support or other FDA-designated “critical” devices.
NOTICE
This unit complies with the limits for a Class A digital device, pursuant to Part 15 Subpart J
of the FCC rules. These limits provide reasonable protection against harmful interference in a
commercial environment. This unit generates, uses and radiates radio frequency energy and,
if not installed and used in accordance with this instruction manual, may cause harmful
interference to radio communications. Operation of this unit in a residential area may cause
harmful interference that the user must correct at his own expense.
2
1.0 MECHANICAL INSTALLATION
1.1 Introduction
This following section describes the requirements that must be taken into account when planning the
positioning and cabling of the Liebert NXL battery equipment.
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
Do not apply electrical power to the UPS equipment before the arrival of the commissioning
engineer.
1.2 Preliminary Checks
Before installing the battery equipment, please 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.
• Verify that the battery room satisfies the environmental conditions stipulated in the equipment
specification, paying particular attention to the ambient temperature and air exchange system.
Mechanical Installation
1.3 Environmental Considerations
1.3.1 Battery Room
Batteries should be mounted in an environment where the temperature is consistent and even over
the whole battery. Temperature is a major factor in determining the battery life and capacity. Typical
battery manufacturer performance data are quoted for an operating temperature between 20 and
25°C (68 and 77°F). Operating above this range will reduce the battery life while operation below this
range will reduce the battery capacity.
Battery Temperature
In a normal installation, the battery temperature should be kept between 15°C and 25°C
(59 and 77°F).
NOTE
Keep batteries away from main heat sources or main air inlets etc.
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 7).
NOTICE
An unused battery must be recharged periodically as recommended by the battery
manufacturer.
3
1.4 Positioning
The cabinet is structurally designed to handle lifting from the base.
Access to the power terminals, auxiliary terminals blocks and power switches is from the front and
top.
Removable panels on the top are secured to the chassis by screws. The door can be opened to give
access to the power connections bars, auxiliary terminal blocks and power isolators. The front door
can be opened at 180° for better service and more flexibility in installations.
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/cm
dling equipment. See Table 4 for weight details.
Ensure any lifting equipment used in moving the battery equipment has sufficient lifting capacity.
Battery system equipment can be handled by means of a forklift or similar equipment.
Because the weight distribution in the cabinet is uneven, use extreme care during handling and
transporting.
Mechanical Installation
2
) of any han-
When moving the unit by forklift, care must be taken to protect the panels. Do not exceed a 15 degrees
tilt with the forklift. Bottom structure will support the unit only if the forks are completely beneath
the unit.
Handling the unit with straps is not authorized.
WARNING
!
Risk of heavy unit falling over. Can cause equipment damage, injury or death.
Exercise extreme care when handling battery cabinets to avoid equipment damage or injury
to personnel. The battery system cabinets weigh from 3760 to 5750 lb. (1706 to 2608).
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.
The battery ships with extra bolts installed on the interior doors. Once the cabinet is in the final position, these bolts can be removed. See Figure 1
4
Figure 1 Shipping bolts
Shipping
Bolts
Shipping
Bolts
Shipping
Bolts
Mechanical Installation
Shipping
Bolts
Shipping
Bolts
1.4.2 Clearances
Liebert NXL has no ventilation grilles at either side or at the rear of the battery system equipment.
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 the ceiling of the room in which it is installed to permit adequate circulation of air coming
out of the unit.
1.4.3 Raised Floor Mounting
If the equipment is to be placed on a raised floor, it should be mounted on a pedestal suitably designed
to accept the equipment point loading. Refer to the base view to design this pedestal.
Shipping
Shipping Bolts
Bolts
* Doors removed for clarity
Shipping
Bolts
1.5 System Composition
A battery system can consist of a number of equipment cabinets, depending on the individual system
design requirements - e.g., Battery Cabinet, Module Battery Disconnect, Junction Cabinet. Refer to
3.0 - Installation Drawings for the positioning of the cabinets described below.
5
2.0 BATTERY INSTALLATION
2.1 Safety
Special care should be taken when working with the batteries associated with the Liebert NXL Battery System equipment. When all the cells are connected together, the battery terminal voltage will
exceed 400V and is potentially lethal. A primary safety consideration is to install the battery equipment in an isolated area, accessible only to properly trained and qualified maintenance personnel.
WARNING
!
Risk of electric shock. Can cause equipment damage, personal injury or death.
Hazardous battery voltage present behind covers. No user-serviceable parts are located
behind covers that require a tool for removal. Only properly trained and qualified service
personnel are authorized to remove such covers or perform installation or maintenance.
The following general battery safety precautions and warnings must be observed at all times:
• A battery can present risk of electric shock or burn from high short circuit currents.
• When connected in a string, the voltage will exceed 400VDC. This voltage is potentially
lethal. Always observe high-voltage precautions.
• Eye protection must be worn to prevent injury from accidental electrical arcs.
• Remove rings, watches, necklaces, bracelets and all other metal objects.
• Use only tools with insulated handles.
• Wear appropriate personal protective equipment when handling batteries.
• If a battery leaks electrolyte or is otherwise physically damaged, it should be placed in a
container resistant to wire and disposed of in accordance with local regulations.
• If electrolyte comes into contact with the skin, the affected area should be washed immediately with plenty of clean water.
• Batteries must always be disposed of according to local environmental laws.
• When replacing batteries, use the same number and type that were originally fitted.
• Disconnect charging source prior to connecting or disconnecting battery terminals.
• Determine if the battery is grounded. If it is grounded, remove source of ground. Contact
with any part of a grounded battery can result in electrical shock.
• Battery support tray must be used whenever a battery tray is being pulled out.
Battery Installation
2.2 Layout
Depending on the site layout, the Battery cabinets can be installed in any of several ways:
• Connected—Multiple Battery cabinets bolted together
• Stand-Alone—Cabinet not bolted to Liebert NXL equipment
• Attached—Battery Cabinets are bolted to a Liebert NXL UPS
• Detached—Battery Cabinets are not bolted to a Liebert NXL UPS
See Figures 2 through 8.
6
Figure 2 Battery cabinets connected, attached to UPS
Battery Installation
Liebert
NXL
UPS
Battery Strings with a
Module Battery Disconnect
can have a maximum of
four battery cabinets.
Additional
Liebert
NXL
Battery
Cabinet
Figure 3 Battery cabinets connected, detached from UPS
Liebert
NXL
Battery
Cabinet
Liebert
NXL
Battery
Cabinet
Additional
Liebert
NXL
Battery
Cabinet
Liebert
NXL
UPS
Maximum of four battery
cabinets in parallel.
The junction cabinet allows for
sufficient conduit landing space.
It is required for systems of
500kVA or above.
Liebert
NXL
UPS
Additional
Liebert
NXL
Battery
Cabinet
Narrow
Junction
Cabinet
Liebert
NXL
Battery
Cabinet
Liebert
NXL
Battery
Cabinet
Narrow
Junction
Cabinet
Additional
Liebert
NXL
Battery
Cabinet
Liebert
NXL
UPS
7
Figure 4 Battery cabinets connected, with Module Battery Disconnect, attached to UPS
Battery Installation
Liebert
NXL
UPS
Liebert
NXL
Module
Battery
Disconnect
Cabinet
Liebert
NXL
Battery
Cabinet
Additional
Liebert
NXL
Battery
Cabinet
Battery Strings with a
Module Battery Disconnect
can have a maximum of
four battery cabinets.
Additional
Liebert
NXL
Battery
Cabinet
Liebert
NXL
Battery
Cabinet
Liebert
NXL
Module
Battery
Disconnect
Cabinet
Liebert
NXL
UPS
Figure 5 Battery cabinets connected, with Module Battery Disconnect, detached from UPS
Battery Strings with a
Module Battery Disconnect
can have a maximum of
four battery cabinets.
Liebert
NXL
UPS
Additional
Liebert
NXL
Battery
Cabinet
Liebert
NXL
Module
Battery
Disconnect
Cabinet
Liebert
NXL
Battery
Cabinet
Liebert
NXL
Battery
Cabinet
Liebert
NXL
Module
Battery
Disconnect
Cabinet
Additional
Liebert
NXL
Battery
Cabinet
Liebert
NXL
UPS
8
Battery Installation
Figure 6 Battery cabinets connected, detached from Module Battery Disconnect, detached from UPS
Liebert
Battery Strings with a Module
Liebert
NXL
UPS
NXL
Module
Battery
Disconnect
Cabinet
Narrow
Junction
Cabinet
Liebert
NXL
Battery
Cabinet
Battery Disconnect can have a
maximum of four battery
cabinets.
The junction cabinet is used to
allow for sufficient conduit
landing space and is required
for systems of 500kVA or
above.
Additional
Liebert
NXL
Battery
Cabinet
Liebert
NXL
Battery
Cabinet
Narrow
Junction
Cabinet
Liebert
NXL
Module
Battery
Disconnect
Cabinet
Figure 7 Stand-alone battery cabinets, with Module Battery Disconnect, detached from UPS
Additional
Liebert
NXL
Battery
Cabinet
Liebert
NXL
UPS
Battery Strings with a
Module Battery
Disconnect can have
a maximum of four
battery cabinets.
The junction cabinet
provides sufficient
conduit landing space
and is required for all
systems in this
configuration.
Liebert
NXL
UPS
Additional
Liebert
NXL
Battery
Cabinet
Liebert
NXL
Module
Battery
Disconnect
Cabinet
Liebert
NXL
Battery
Cabinet
Wide
Junction
Cabinet
Wide
Junction
Cabinet
Liebert
NXL
Battery
Cabinet
Liebert
NXL
Module
Battery
Disconnect
Cabinet
Additional
Liebert
NXL
Battery
Cabinet
Liebert
NXL
UPS
9
Battery Installation
Figure 8 Stand-alone battery cabinets, no Module Battery Disconnect, detached from UPS
Maximum of four battery
cabinets.
The junction cabinet
provides sufficient conduit
landing space and is
required for all systems in
this configuration.
2.3 Cable Entry
Cables may enter the battery cabinet from either the top or the bottom. Cable entry is made possible
by installing conduit to the removable plate fitted at the top or bottom. See 3.0 - Installation Draw-
ings.
Liebert
NXL
UPS
Additional
Liebert
NXL
Battery
Cabinet
Wide
Junction
Cabinet
Liebert
NXL
Battery
Cabinet
Liebert
NXL
Battery
Cabinet
Wide
Junction
Cabinet
Additional
Liebert
NXL
Battery
Cabinet
Liebert
NXL
UPS
2.4 Power Connection
Depending on the site layout, the Battery cabinets can be cabled several ways. See Figures 2
through 8.
2.4.1 Connected System
For cabinets that have been ordered as connected (battery cabinets will bolt to each other), the positive and negative busbars can be bolted together using the supplied bus bar connector extensions. See
Figure 24
2.4.2 Stand-Alone System
For cabinets that are ordered as stand-alone, customer must supply all the interconnecting cables
and hardware. See Table 15 for current ratings and recommended cable sizes.
2.4.3 Attached/Detached System
For battery cabinets that are connecting to a Liebert NXL UPS, Liebert NXL MBD cabinet or Liebert
NXL Junction cabinet (see Figures 2 through 6), cables will run from the positive and negative busbars of the adjacent battery cabinet to the positive and negative DC connections of UPS, MBD or
Junction cabinet.
For attached systems (the cabinets bolt to each other) the cables can run internal to the cabinets and
will be supplied.
For detached systems (the cabinets do not bolt to each other), the cables must be run outside the cabinets. The customer must supply all the interconnecting cables and hardware. See Table 15 for current ratings and recommended cable sizes.
10
2.4.4 MBD voltage sense leads
For ease of installation, the power cables from the battery cabinets can be installed on either the top
or bottom breaker busbars (depending if top or bottom entry is used). The voltage sense leads need to
be connected to the busbars on the input of the circuit breaker (busbars that have the cables from the
battery system connected.) See Figure 22.
WARNING
!
Risk of electric shock. Can cause equipment damage, personal injury or death.
Hazardous battery voltage may be present on busbar. Install battery voltage sense leads
before connecting the positive and negative power cables.
2.4.5 Grounding
For cabinets that have been ordered as connected or attached, the ground cables and hardware will be
supplied. See Figure 25 for location of cabinet-to-cabinet grounding.
For cabinets ordered as detached or stand-alone, customer must supply the cables and hardware. See
Table 15 for current ratings and recommended cable sizes.
2.5 Control Connection
Each Liebert NXL Battery Cabinet and Liebert NXL Module Battery Disconnect (MBD) contains a
Battery Interface Board (BIB). See 3.0 - Installation Drawings. All cabinets in a system must have
their Battery Interface boards connected in series. See Figure 14 for battery cabinet details and
Figure 16 for MBD details.
Battery Installation
NOTE
Care must be taken to route the control cables away from high voltage cables or busbars.
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