Liebert NXL Installation manual

Liebert

®

NXL

™

Installation Manual – 250-400kVA, 60Hz, Three-Phase, Single-Module

AC Power

For Business-Critical Continuity™

C

ONTACTING

E

MERSON

N

ETWORK

P

OWER FOR

S

UPPORT

To contact Emerson Network Power Liebert Services for information or repair service in the United

States, call 1-800-LIEBERT (1-800-543-2378). Liebert Services offers a complete range of start-up 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 areas not covered by Emerson Network Power Liebert Services, the authorized distributor is responsible for providing qualified, factory-authorized service.

For LGS to assist you promptly, please have the following information available:

Part numbers: _________________________________________________________________

Serial numbers:________________________________________________________________

Rating: _______________________________________________________________________

Date purchased: _______________________________________________________________

Date installed:_________________________________________________________________

Location: ______________________________________________________________________

Input voltage/frequency:________________________________________________________

Output voltage/frequency: ______________________________________________________

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

C

ONTACTING

E

MERSON

N

ETWORK

P

OWER FOR

S

UPPORT

. . . . . . . . . . . . . . . I

NSIDE

F

RONT

C

OVER

I

MPORTANT

S

AFETY

I

NSTRUCTIONS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.0

S

INGLE

-M

ODULE

M

ECHANICAL

I

NSTALLATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

1.1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.2

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

1.3

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

1.3.1

UPS 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

Raised Floor Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.4.4

Kick Plate Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.4.5

Special Considerations for 1+N Parallel Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.5

System Composition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.6

Cable Entry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.0

UPS E

LECTRICAL

I

NSTALLATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

2.1

External Protective Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2

Power Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2.1

Sizing the Input Breaker Feeding a Liebert NXL UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2.2

Power Cable Connection Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.3

Control Cable and Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.3.1

Dry Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.3.2

Multi-Module Communication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.4

Digital LBS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.5

Configuring Neutral and Ground Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.5.1

Four-Wire Input connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.5.2

Three-Wire Input Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.5.3

Preferred Grounding Configuration, Battery Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.5.4

Multi-Module Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.5.5

High Resistance Ground Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.6

Grounding Diagrams, Single- and Multi-Module Systems . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.0

O

PTIONAL

E

QUIPMENT

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

3.1

Single-Module System Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.1.1

Matching Maintenance Bypass Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.1.2

Battery Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.1.3

Matching Liebert NXL Battery Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.1.4

Matching Module Battery Disconnect—MBD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.1.5

Load Bus Synch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.1.6

Remote Alarm Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.2

Communication and Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.2.1

Alber Monitoring System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

i

4.0

I

NSTALLATION

D

RAWINGS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

5.0

S

PECIFICATIONS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

FIGURES

Figure 1

Cabinet arrangement—Liebert NXL, battery cabinets, maintenance bypass cabinet . . . . . . . . . . 6

Figure 2 Cabinet grounding plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 3 Kick plate and filter locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 4 External Interface Board connections layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 5 Inter-Module Communication Board wiring diagram—Multi-modules . . . . . . . . . . . . . . . . . . . . 14

Figure 6 Inter-Module Communication Board wiring diagram—Digital LBS . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 7 Grounding diagram, three-wire single-module system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 8 Grounding diagram, four-wire single-module system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 9 Grounding diagram, three-wire multi-module system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 10 Grounding diagram, foure-wire multi-module system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 11 Main components location, 250kVA Liebert NXL N+1 multi-module unit without static bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 12 Outline drawing, 250kVA Liebert NXL N+1 multi-module unit without static bypass . . . . . . . . 21

Figure 13 Main components location, 300kVA Liebert NXL N+1 multi-module unit without static bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22


Figure 15 Input/output conduit detail drawing, 250-300kVA Liebert NXL N+1 multi-module unit without static bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 16 Top cable entry routing and installation order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Figure 17 Bottom cable entry routing and installation order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Figure 18 Input/output terminal detail, 400kVA Liebert NXL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 19 Main components, 400kVA Liebert NXL N+1 multi-module unit without static bypass . . . . . . . 28


Figure 21 Single-input busbar arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 22 Low-voltage cable entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 23 Inverter overload data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 24 Bypass overload data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

TABLES

Table 1

Table 2

Table 3

Table 4

Table 5

UPS input dry contacts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

UPS control with battery cabinet or module battery disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . 12

UPS control contacts with global maintenance bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

UPS control contacts to remote status panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Parallel from UPS module Inter-Module Communication Board to other Inter-Module

Communication Board in system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Table 6

Table 7

Table 8

Wire size, length for digital LBS connection of UPS Inter-Module Communication

Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Liebert NXL UPS specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Current ratings—bypass input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Table 9 Current ratings—output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Table 10 Current ratings—battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Table 11 Current ratings—rectifier input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Table 12 Recommended conduit and cable sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Table 13 Recommended lug sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Table 14 Recommended torque values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

ii

I

MPORTANT

S

AFETY

I

NSTRUCTIONS

SAVE THESE INSTRUCTIONS

This manual contains important instructions that should be followed during installation of your

Liebert NXL

™

UPS.Read this manual thoroughly, paying special attention to the sections that apply to your installation, before working with the UPS. Retain this manual for use by installing

personnel.

!

WARNING

Risk of electrical shock. Can cause personal injury or death.

This UPS has several circuits that are energized with high DC as well as AC voltages. Check for voltage with both AC and DC voltmeters before working within the UPS. Check for voltage with both AC and DC voltmeters before making contact.

Only properly trained and qualified personnel wearing appropriate safety headgear, gloves, shoes and glasses should be involved in installing the UPS or preparing the UPS for installation. When performing maintenance with any part of the equipment under power, service personnel and test equipment should be standing on rubber mats.

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 installation and maintenance.

Special safety precautions are required for procedures involving handling, installation and maintenance of the UPS system. Observe all safety precautions in this manual before handling or installing the UPS system. Observe all precautions in the Operation and

Maintenance Manual, SL-25425, before as well as during performance of all maintenance procedures. Observe all DC safety precautions before working on or near the DC system.

!

!

WARNING

Risk of heavy unit falling over. Improper handling can cause equipment damage, injury or death.

Exercise extreme care when handling UPS cabinets to avoid equipment damage or injury to personnel. The UPS module weight ranges from 3965 to 6380 lb. (1768 to 2894kg).

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 modules cabinets are intended for forklift use. Base slots will support the unit only if the forks are completely beneath the unit.

Read all of the following instructions before attempting to move, lift, remove packaging from or preparing unit for installation.

WARNING

Risk of electrical shock and fire. Can cause equipment damage, personal injury or death.

Under typical operation and with all UPS doors closed, only normal safety precautions are necessary. The area around the UPS system should be kept free of puddles of water, excess moisture and debris.

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 DC connections.

All wiring must be installed by a properly trained and qualified electrician. All power and control wiring must comply with all applicable national, state and local codes.

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.

1

NOTE

Materials sold hereunder cannot be used in the patient vicinity (e.g., use where UL, cUL or

IEC 60601-1 is required). Medical applications such as invasive procedures and electrical life support equipment are subject to additional terms and conditions.

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 communication. Operation of this unit in a residential area may cause harmful interference that the user must correct at his own expense.

2

Single-Module Mechanical Installation

1.0

S

INGLE

-M

ODULE

M

ECHANICAL

I

NSTALLATION

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 uninterruptible power supply and related equipment.

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

!

WARNING

Risk of electrical shock. Can cause injury or death.

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.

NOTICE

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

NOTICE

Three-phase input supply required.

The standard Liebert NXL UPS is suitable for connection to three-phase, four-wire (+ Earth)

TN-C, TN-S, IT-G, IT-IG or, three-phase, three-wire plus ground, IT-UG.

If using with IT Power system, a 4-pole disconnect device must be included as part of building installation.

NOTICE

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

1.2

Preliminary Checks

Before installing the UPS, please carry out the following preliminary checks:

• Visually examine the UPS 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 UPS room satisfies the environmental conditions stipulated in the equipment specification, paying particular attention to the ambient temperature and air exchange system.

3


1.3

Environmental Considerations

1.3.1 UPS Room

The UPS module 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 Environmental Parameters in Table 7).

The Liebert NXL UPS is cooled with the aid of internal fans. To permit air to enter and exit and prevent overheating or malfunctioning, do not cover the ventilation openings.

NOTE

To ensure proper airflow, the unit must be installed only on a solid surface made of a non-combustible material, such as concrete.

The Liebert NXL UPS is equipped with air filters located behind the front doors. A schedule for inspection of the air filters is required. The period between inspections will depend upon environmental conditions.

When bottom entry is used, the conduit plate must be installed.

NOTE

The UPS is suitable for mounting on concrete or other non-combustible surface only.

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 Environmental Parameters in Table 7).

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.

The door can be opened to give access to the power connections bars, auxiliary terminal blocks and power isolators. Front door can be opened at 180° for more flexibility in installations.

NOTE

The UPS must be placed a solid surface. There must be no openings in the surface except those required for conduit landing areas. All provided kick plates must be installed.

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 UPS weight is within the designated surface weight loading (kg/cm

2

equipment. For weight details, see Table 7.

) of any handling

The UPS can be handled with a forklift or similar equipment. Ensure any lifting equipment used in moving the UPS cabinet has sufficient lifting capacity. When moving the unit by forklift, care must be taken to protect the panels. Do not exceed a 15-degree tilt with the forklift. Bottom structure will support the unit only if the forks are completely beneath the unit.

4


Handling with straps is not authorized.

!

WARNING

Risk of heavy unit falling over. Improper handling can cause equipment damage, injury or death.

Because the weight distribution in the cabinet is uneven, use extreme care while handling and transporting. Take extreme care when handling UPS cabinets to avoid equipment damage or injury to personnel.

The UPS module weight ranges from 3965 to 6380 lb. (1768 to 2894kg).

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.

1.4.2 Clearances

The Liebert NXL has no ventilation grilles at either side or at the rear of the UPS. 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 UPS and any overhead obstacles to permit adequate circulation of air coming out of the unit.

1.4.3 Raised Floor Installations

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. Refer to the base view to design this pedestal. The top of pedestal must be solid.

NOTE

The UPS must be placed on a solid surface. There must be no openings in the surface except those required for conduit landing areas. All provided kick plates must be installed.

1.4.4 Kick Plate Installation

Kick plates must be installed. If the unit is to be installed in a position that does not permit access to the rear kick plates, then kick plates must be installed before the unit is placed in its final position.

1.4.5 Special Considerations for 1+N Parallel Systems

Consider the grounding configuration of your system before finalizing module placement See 2.5 -

Configuring Neutral and Ground Connections.

Emerson Network Power recommends matching the impedance in the bypass path of paralleled systems as closely as possible.

The impedance mismatch can be minimized by controlling the wiring length of each unit. The design and the layout of the UPS system and associated panels and cabling should be examined closely to ensure that cable lengths and impedances are closely matched. The Liebert 1+N UPS module is supplied with a sharing reactor to minimize the impact of cable impedance mismatch.

The cabling impedance must be carefully controlled to ensure good bypass current sharing.

For Liebert NXL Systems, the cabling impedances must be within 10% from maximum to minimum.

If the cabling impedances need to be greater than 10%, contact your Emerson representative to calculate whether the system will result in an overload condition when operating on bypass.

When bringing the 1+N system online for the first time or after removing one unit, Emerson recommends checking the bypass current mismatch. To check the bypass current mismatch:

1. Place a load on the bypass of each UPS module.

2. View the output current of each unit.

The accuracy of the currents displayed on the UPS module is sufficient for this check. If the mismatch is greater than 10%, the bypass impedances must be balanced or the load must be limited to less than the maximum rating.

5


1.5

System Composition

A UPS system can comprise a number of equipment cabinets, depending on the individual system design requirements, e.g. UPS cabinet, battery cabinet, maintenance bypass cabinet. In general, all the cabinets used in a particular installation are of the same height. Refer to the drawings provided in

4.0 - Installation Drawings for the positioning of the cabinets as shown in Figure 1.

1.6

Cable Entry

Cables can enter the UPS cabinet from bottom or top into the Input/Output (I/O) section of the unit,

see the figures in 4.0 - Installation Drawings.

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

The side panels and hangers must be removed before the cabinets can be bolted together.

Liebert

NXL

UPS

Liebert

NXL

UPS

Maintenance

Bypass

Cabinet

Note: If a maintenance bypass cabinet is used, it must be installed on the right side of the Liebert NXL UPS

Additional

Battery

Cabinet(s)

Battery

Cabinet

Liebert

NXL

UPS

Maintenance

Bypass

Cabinet

Additional

Battery

Cabinet(s)

Battery

Cabinet

Liebert

NXL

UPS

Liebert

NXL

UPS

Battery

Cabinet

Additional

Battery

Cabinet(s)

6

UPS Electrical Installation

2.0

UPS E

LECTRICAL

I

NSTALLATION

This chapter provides guidelines for qualified installers who must have knowledge of local wiring practices pertaining to the equipment to be installed.

!

WARNING


The UPS contains high DC as well as AC voltages. Check for voltage with both AC and DC voltmeters before working within the UPS.

Only properly trained and qualified personnel wearing appropriate safety headgear, gloves, shoes and glasses should be involved in installing the UPS or preparing the UPS for installation.

2.1

External Protective Devices

For safety, it is necessary to install circuit breakers in the input AC supply and external battery system. Given that every installation has its own characteristics, this section provides guidelines for qualified installation personnel with knowledge of operating practices, regulatory standards and the equipment to be installed.

External overcurrent protection must be provided. See Table 7 - Liebert NXL UPS specifications

for overload capacity.

Dual Input

When wiring the UPS with a separate rectifier and bypass input, each input must be protected

separately. Size the breakers according to the input currents shown in Table 7.

7


2.2

Power Cables

The UPS requires both power and control cabling. All control cables, whether shielded or not, should be run separate from the power cables in metal conduits or metal ducts which are electrically bonded to the metalwork of the cabinets to which they are connected

The cable design must comply with the voltages and currents in Table 7, follow local wiring practices

and take into consideration the environmental conditions (temperature and physical support media),

room temperature and conditions of installation of the cable and system’s overload capacity (see 5.0 -

Specifications).

For cable entry terminal, refer to Figure 15.

!

WARNING


Before cabling the UPS, ensure that you are aware of the location and operation of the external isolators that connect the UPS input/bypass supply to the power distribution panel.

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

NOTICE

For dual input operation ensure that any busbars between the bypass and the rectifier input are removed.

When sizing battery cables, a maximum volt drop of 2VDC is permissible at the current ratings given

in Table 11.

The following are guidelines only and 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 non-

linear loads. Refer to the values in Table 7.

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

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

• AC and DC cables must be run in conduits according to local codes, national codes and standard best practices. This will prevent creation of excess EMI fields.

2.2.1 Sizing the Input Breaker Feeding a Liebert NXL UPS

The rectifier nominal input current value (Table 8) is based on providing enough power to operate

the inverter at full rated load when the input voltage is nominal. The published rectifier maximum input current value is based on the maximum input current limit setting of 125%.

The recommended input breaker ampacity is based on the NEC calculation for a branch circuit with the current limit set at the maximum value. The calculation for an 80% rated breaker is 125% of the nominal current (continuous) plus 100% of the difference between the nominal and the maximum currents (non-continuous). The calculation for a 100% rated breaker is 100% of the nominal current

(continuous) plus 100% of the difference between the nominal and maximum currents

(non-continuous).

The rectifier input current limit can be adjusted from 25% to 125% of the nominal value. This setting is accessible only to a factory-trained service engineer. The effect of changing this setting is similar to that of changing the setting of the trip unit on a solid-state circuit breaker. With a lower current limit setting, the calculation for the branch circuit will result in a lower value.

The input current limit should not be set less than 105% of the current needed to support the inverter at full load for normal operation. This results in sufficient power to recharge the battery in a reasonable time and to operate over the published input voltage range.

8


2.2.2 Power Cable Connection Procedure

The rectifier input, bypass, output and battery power cables (all require lug type terminations) are

connected to busbars situated in the I/O section as shown in Figures 15 through 17.

Equipment Ground

The equipment ground busbar is located in the I/O section as shown in Figure 15. The grounding

conductor must be connected to the ground busbar and bonded to each cabinet in the system.

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

!

NOTE

Proper grounding reduces problems in systems caused by electromagnetic interference.

WARNING

Failure to follow adequate grounding procedures can result in electric shock hazard to personnel, or the risk of fire, should a ground fault occur.

All operations described in this section must be performed by properly trained and qualified electricians or technical personnel. If any difficulties are encountered, contact Emerson

Network Power Liebert Services. See the back page of this manual for contact information.

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

Once the equipment has been positioned and secured, connect the power cables as described below

(refer to the appropriate cable connection drawing in 4.0 - Installation Drawings):

1. Verify that the UPS equipment is isolated from its external power source and all the UPS power isolators are open. Check that these supplies are electrically isolated and post any necessary warning signs to prevent their inadvertent operation.

2. Open exterior and interior panels on the front of the I/O.

3. Connect the ground and any necessary main bonding jumper to the equipment ground busbar located in the I/O section.

4. Make power connections and tighten the connections to the proper torque according to one of the two procedures below, depending on the type of installation:

Ensure correct phase rotation.

• Top Cable Entry (see Figure 16)

• Bottom Cable Entry (see Figure 17)

Top Cable Entry

When making the power connections for top cable entry, the recommended order of pulling and installing cables is to start from the top connections to the bottom connections. The cables

must be routed around the fault braces (see Detail in Figure 16). This is to prevent the cables

from contacting other busbars. The recommended conduit layout is shown in Figure 15.

Bottom Cable Entry

When making the power connections for bottom cable entry, the recommended order of pulling and installing cables is to start from the bottom connections to the top connections. The cables

must be routed around the fault braces (see Detail in Figure 17). This is to prevent the cables

from contacting other busbars. The recommended conduit layout is shown in Figure 15.

!

!

NOTE

For a Single Input configuration, linking busbars must be installed between the bypass and the rectifier input.

WARNING


If the load equipment will not be ready to accept power on the arrival of the commissioning engineer, ensure that the system output cables are safely isolated at their termination.

WARNING


When connecting the cables between the battery extremities to the circuit breaker always connect the circuit breaker end of the cable first.

9


5. For control connection details, see 2.3 - Control Cable and Communication.

NOTE

If fault bracing brackets were removed during installation, they MUST be replaced.

6. Close and secure the interior and exterior doors.

Figure 2 Cabinet grounding plates

Note location of larger cutouts.

Orient ground plate as shown.

A

Installed at Each Shipping Split

Figure 3 Kick plate and filter locations

Detail A

Mounting

Hardware

(Supplied)

KICKPLATE

G

KICKPLATE

D

FRONT

REAR

KICKPLATE

KICKPLATE

E

F

DETAIL D

INSTALL M6X25 BOLT,

LCKW AND WSHR

(4) PLACES, FRONT SIDE

DETAIL E

INSTALL M6X25 BOLT,

LCKW AND WSHR

(2) PLACES, EACH SIDE

DETAIL G

INSTALL M6X60 BOLT,

LCKW AND WSHR

(2) PLACES, FRONT SIDE

INSTALL M6X25 BOLT,

LCKW AND WSHR

(4) PLACES, REAR SIDE

NOTE

Kick plates must be installed. If the unit is to be installed in a position that does not permit access to rear kick plates, then kick plates must be installed before the unit is placed in its final position.

10


2.3

Control Cable and Communication

Based on your site’s specific needs, the UPS may require auxiliary connections to manage the battery system (external battery circuit breaker), communicate with a personal computer or provide alarm signaling to external devices, or for Remote Emergency Power Off (REPO). The External Interface

Board, arranged for this purpose, is next to the option box in the Rectifier section (refer to 4.0 -

Installation Drawings).

Figure 4 External Interface Board connections layout

MAINT BYP

ENABLE

TB0821

ACT FILT

CNTL

TB035

P66C P99C

EXTERNA L

CAN

TB0823

EPO

STATUS

LBS VO LTAGE

BATT MTR

OP

TB1156

TB0826

P0808

OPT

PS

TB0829 TB1154B

EXTERNA L

CAN

INT BATT

CAN

TB1154A

EXT BATT

CAN

TB0825

REPO

J4

J5

TB0824

REPO

FORM C

P0831

AUX SPARE

TEMP

P0832

P0801

BATT GND

FLT

TB0815

MOB

TB0811

MIB

TB0810

RIB

TB0830

ACT FILT

STATUS

TB0816

ON GEN

TB0813

MBB

TB0812

BIB

TB0820

KEY

STATUS

TB0819

BYP CNTL

TB0817

RECT

CNTL

TB0818

INV

CNTRLN

11


2.3.1 Dry Contacts

NOTE

If connection to more than one module is required, use a separate contact for each module.

Table 1

Item

Remote EPO

Input Form C

UPS input dry contacts

Terminal

Block

On Generator

Input Form C

TB0824

TB0816

1

2

3

Pin

1

2

3

Connects to

(Description of External Item)

REPO Switch, normally open contact

REPO Switch, common contact

REPO Switch, normally closed contact, set jumper

J5: 1-2 to enable, 2-3 to disable

On Generator switch, closed = On Generator

On Generator switch, common

On Generator switch, closed = Not On Generator

Wire Size/

Max Length

14AWG/

500ft.

(150m).

Table 2

Item

CAN Bus and

24V Power

Supply

UPS control with battery cabinet or module battery disconnect

Terminal

Block

TB1154A

Pin

1

2

3

4

Connects to


Battery Interface Board TB1154-1




Wire Size/

Max Length

18 AWG

1000ft.

(300m).

Table 3 UPS control contacts with global maintenance bypass

Item

Terminal

Block Pin

Connects to


Wire Size/

Max Length

Maintenance

Isolation Breaker

(MIB) Form C

1

Maintenance Bypass

Breaker (MBB) Form C

1

TB0811

TB0813

1 CB aux. contact, closed = CB is closed

2 CB aux. contact, common

3 CB aux. contact, closed = CB is open




14AWG/500ft.

(150m)

14AWG/500ft.

(150m)

Maintenance Bypass

Enable Form C

1

TB0821

1

2

Maintenance Bypass Cabinet, closed = load not on inverter

Maintenance Bypass Cabinet, common

14AWG/500ft.

(150m)

3

Maintenance Bypass Cabinet, closed = load on inverter

1 REPO Switch, normally open contact

Remote EPO Input

Key Status Input

1

1, 3

TB0825

TB0820

2 REPO Switch, common contact

1 Key status switch, closed = key removed

2 Key status switch, common

3 Key status switch, closed = key inserted

14AWG/500ft.

(150m)

14AWG/500ft.

(150m)

Module Output Breaker

(MOB) Form C

2

TB0815



14AWG/500ft.

(150m)


1. For 1+N systems with a maintenance Bypass, these Aux contacts must be run to each module from an isolated source.

2. For 1+N systems, these breaker Aux contact go to the UPS that it is associated with.

3. Key Status Input can be either Form-C, N.O. or N.C. contact.

12


Table 4

Item

UPS control contacts to remote status panel

Terminal

Block Pin

Connects to


Wire Size/

Max Length

CAN Bus and 24V

Power Supply

TB0829

1 Remote Status Panel TB-2




2.3.2 Multi-Module Communication

18 AWG/1000ft.

(300m)

Paralleling cables that connect the module to the system are connected to terminals P3101 and P3103

on the Inter-Module Communication (IMC) board (refer to 4.0 - Installation Drawings).

Table 5 Parallel from UPS module Inter-Module Communication Board to other Inter-Module

Communication Board in system

Terminal Designation

From To Signal Name

Wire Size/

Max Length

Primary Connections

P3101-1 P3101-1 Share CAN +24V

P3101-2

P3101-3

P3101-2

P3101-3

Share CAN common

System CAN +24V

P3101-4

P3101-5

P3101-6

P3101-7

P3101-4

P3101-5

P3101-6

P3101-7

System CAN common

SER synch CAN+24V

SER synch CAN common

Ground - Drain Wire

P3101-14

P3101-8

P3101-9

P3101-10

P3101-14 Ground

P3101-8 PWM synch CAN +24V

P3101-9 PWM synch CAN common

P3101-10 MMS synch CAN +24V

P3101-11 P3101-11 MMS synch CAN common

Redundant Connections

P3103-1

P3103-2

P3103-1

P3103-2

Redundant share CAN +24V

Redundant share CAN common

1000ft.

(300m)

P3103-3

P3103-4

P3103-5

P3103-6

P3103-7

P3103-14

P3103-8

P3103-9

P3103-3

P3103-4

P3103-5

P3103-6

P3103-7

P3103-14

P3103-8

P3103-9

Redundant system CAN +24V

Redundant system CAN common

Redundant SER synch CAN +24V

Redundant SER synch CAN common

Ground - Drain Wire

Ground

Redundant PWM synch CAN +24V

Redundant PWM synch CAN common

1000ft.

(300m)

P3103-10 P3103-10 Redundant MMS synch CAN +24V

P3103-11 P3103-11 Redundant MMS synch CAN common

1. Belden 810x or Belden 89901 cables are the only approved cables.

2. Belden 89901 cable can be used for underground installations.

3. If using multiple parallel cables for each run, all cables must be run in the same conduit.

4. Each cable group should be run in a separate grounded conduit to ensure redundancy.

5. The maximum lengths must include all the parallel cables from the first module to the last module. The primary and redundant cable lengths can be counted separately.

6. The ground pins on the Inter-Module Communication Board (Pins 7 and 14) are connected together on the board. If using cable with only one (1) drain wire, then connect the ground (drain wire) to Pin 7.

7. Care must be taken to orevebt the drain wire from touching any other component in the module.

8. Attach control wires to the side of the control door where the Inter-Module Board (IMC) is attached. Do not run wires across the IMC board.

13

Figure 5 Inter-Module Communication Board wiring diagram—Multi-modules


IMC

02-806730-xx

P3103

P3101

UPS 1

IMC

02-806730-xx

P3103

P3101

UPS 2

IMC

02-806730-xx

P3103

P3101

UPS 3

2.4

Digital LBS

The Load Bus Sync interface enables independent UPS units to remain in sync when operating on battery or when supplied by unsynchronized input sources.

Digital LBS cables that connect the module to the system are connected to terminals P3108 and

P3109 on the Inter-Module Communication (IMC) board. See Figure 6

.

Table 6 Wire size, length for digital LBS connection of UPS Inter-Module Communication

Boards

Terminal Designation

From To Signal Name

Wire Size/

Max Length

Digital LBS from UPS inter-module communication board to other UPS inter-module communication board

P3108-1

P3108-2

P3108-1

P3108-2

LBS Synch CANH

LBS Synch CANL

3000ft

(900m)

P3108-3 P3108-3 Ground - Drain Wire

Redundant Digital LBS from UPS Inter-Module Communication Board to Other UPS

Inter-Module Communication Board

P3109-1

P3109-2

P3109-1

P3109-2

Redundant LBS Synch CANH

Redundant LBS Synch CANL

3000ft

(900m)

P3109-3 P3109-3 Ground - Drain Wire

1. Belden 810x or Belden 89901 cables are the only approved cables.

2. Each cable group should be run in a separate grounded conduit to ensure redundancy.

3. The maximum lengths must include all the LBS cables from the first module to the last module.

4. The primary and redundant cable lengths can be counted separately.

5. Belden 89901 cable can be used for underground installations.

6. Attach the control wire to the side of the control door where the Inter-Module Board (IMC) is attached.

Do not run wires across the IMC board.

Figure 6 Inter-Module Communication Board wiring diagram—Digital LBS

IMC

02-806730-xx

P3108

P3109

UPS 1

IMC

02-806730-xx

P3108

P3109

UPS 2

IMC

02-806730-xx

P3108

P3109

UPS 3

14


2.5

Configuring Neutral and Ground Connections

Improper grounding is the largest single cause of UPS installation and startup problems. Grounding techniques vary significantly from site to site, depending on several factors.

Proper grounding should be based on NEC Section 250, but safe and proper equipment operation requires further enhancements. The following pages detail recommendations for grounding various system configurations to ensure optimal UPS system performance.

!

NOTE

Some UPS modules are equipped with input isolation transformers. However, these transformers have no effect upon any system grounding considerations. These modules will be

grounded exactly as shown in Figures 7 through 10.

CAUTION

The UPS ground lug must be solidly connected to the service entrance ground by an appropriately sized wire conductor per NEC Article 250. Each conduit or raceway containing phase conductors must also contain a ground wire, both for UPS input and output, which are solidly connected to the ground terminal at each termination point. Conduit-based grounding systems tend to degrade over time. Therefore, using conduit as a grounding conductor for UPS applications may degrade UPS performance and cause improper UPS operation.

2.5.1 Four-Wire Input connections

The UPS module main input and bypass input are connected to a grounded service. In this configuration, the UPS module is not considered a separately derived source. The UPS module output neutral is solidly connected to the building service neutral, which is bonded to the grounding conductor at the service entrance equipment.

Advantages of this configuration include:

• A measure of common-mode noise attenuation, since the isolation (common-mode rejection) occurs as close to the load as practical (i.e., at the PDU).

• The UPS module can be located remotely from the PDU without compromising common-mode noise performance.

• By using UPS modules with 480VAC input and output and creating 208VAC at the PDU, smaller and less costly power feeders can be used and less voltage drop (as a percent of nominal) occurs.

2.5.2 Three-Wire Input Connections

This configuration must NOT be used when single-phase loads are directly connected to the UPS.

The UPS output transformer is considered a separately derived source. The UPS module neutral is bonded to the UPS ground, which is connected to a local grounding electrode in accordance with

NEC 250-26. Please note that this configuration represents a price/performance trade-off. Whenever the UPS module transfers to or from bypass, two AC sources (input and bypass) are briefly connected together and circulating current must flow. In this configuration, the current flows through the ground path, possibly tripping ground fault interrupters (GFIs) and distorting the bypass waveform reference. Proper adjustment of ground fault interrupters is necessary to avoid unwanted tripping.

The time delay should be set to at least 0.2 seconds to prevent tripping when the UPS performs a transfer or retransfer operation.

NOTICE

Risk of improperly set ground fault interrupters. Can cause equipment damage.

Failure to set the ground fault interrupters properly could cause loss of power to the critical load.

15


2.5.3 Preferred Grounding Configuration, Battery Systems

Open-rack battery systems, depending on local code requirements and customer preference, are normally:

• Floating (ungrounded)

OR

• Center-tapped and floating

Battery cabinet systems must be connected as floating (ungrounded) systems.

Center-tapped or grounded battery systems are not possible with battery cabinet systems.

Whether the battery system is open-rack or cabinet, the metal rack parts or cabinet must be grounded to the UPS module ground bus.

2.5.4 Multi-Module Systems

For both N+1 and 1+N systems, the neutrals of all UPS modules in the system must be connected together inside the switchgear or parallel cabinet. The neutral conductors must be rated for 20% of phase conductor current minimum. Site and load conditions will determine if larger neutrals are required.

For Multi-Module systems using a 3-wire bypass, the Neutral-Ground bond must be made at the common neutral connection point in the switchgear or parallel cabinet.

2.5.5 High Resistance Ground Systems

The Liebert NXL is compatible with High Resistance Ground Systems. See your local Emerson representative for details.

2.6

Grounding Diagrams, Single- and Multi-Module Systems

Figure 7 Grounding diagram, three-wire single-module system

UPS

Source

BPSS

N

G

N

G

16


Figure 8 Grounding diagram, four-wire single-module system

Source

BPSS

UPS

N

G

Figure 9 Grounding diagram, three-wire multi-module system

UPS #1

Source

N

G

N

G

UPS #2

N

G

Switchgear

N

G

UPS #3

Grounding for 1+N systems is wired exactly the same.

N

G

N

G

17

Figure 10 Grounding diagram, foure-wire multi-module system

UPS #1

BPSS

N

G

Source

N

G

UPS #2

BPSS

N

G

UPS #3

BPSS

N

G


Switchgear

N

G

18

Optional Equipment

3.0

O

PTIONAL

E

QUIPMENT

3.1

Single-Module System Options

3.1.1 Matching Maintenance Bypass Cabinet

A matching Liebert NXL Maintenance Bypass cabinet is available. See Maintenance Bypass Cabinet

Installation Manual (SL-24532) for more details.

3.1.2 Battery Temperature Sensor

The optional external battery temperature sensor kit, supplied separately from the battery circuit breaker, contains one probe and one temperature transport board.

3.1.3 Matching Liebert NXL Battery Cabinet

The optional matching Liebert NXL Battery Cabinet can be used to obtain the desired autonomy time. The battery cabinets are designed to be either attached to the UPS or separate from the UPS

(for details, see the Liebert NXL Battery Cabinet installation manual, SL-25430, available at

Liebert’s Web site

www.liebert.com

).

3.1.4 Matching Module Battery Disconnect—MBD

The optional Module Battery Disconnect (MBD) can be used as a battery disconnect between a battery system and the Liebert NXL UPS. (for details, see the Liebert NXL Battery Cabinet installation manual, SL-24530, available at Liebert’s Web site

www.liebert.com

).

3.1.5 Load Bus Synch

An optional Load Bus Synch (LBS) system can be used to synchronize two Liebert NXL UPSs or an

Liebert NXL UPS to a Liebert Series 610 UPS.

3.1.6 Remote Alarm Panel

The remote alarm panel has LED alarm lights. An audible alarm sounds upon any alarm condition.

The surface- or flush-mounted NEMA 1 enclosed panel indicates: Load on UPS, Load on Bypass,

Battery Discharging, Low Battery Warning, Overload Warning, Ambient Overtemp Warning, UPS

Alarm Condition and New Alarm Condition (for a second UPS alarm condition).

3.2

Communication and Monitoring

• Liebert IntelliSlot

• Liebert IntelliSlot

®

®

Web Card - SNMP/HTTP Network Interface Card

485 Web Card - Modbus, J-bus, IGM Net

• Remote Monitoring Services IntelliSlot Card

• RS485/422 Protocol Converter IntelliSlot Card

• Programmable Relay Board

• Input Contact Isolator Board

3.2.1 Alber Monitoring System

The matching Liebert NXL Battery Cabinet allows installing an optional Alber Battery monitoring system in the cabinet. The Alber Battery Monitoring by Liebert continuously checks all critical battery parameters, such as cell voltage, overall string voltage, current and temperature. Automatic periodic tests of internal resistance of each battery will verify the battery’s operating integrity.

Additional capabilities include automatic internal DC resistance tests and trend analysis providing the ability to analyze performance and aid in troubleshooting.

19

Installation Drawings

4.0

I

NSTALLATION

D

RAWINGS

Figure 11 Main components location, 250kVA Liebert NXL N+1 multi-module unit without static bypass

HMI Screen

EMO Button

(optional)

Liebert

IntelliSlot

®

Bays

Module Output

Circuit Breaker (CB2)

Backfeed Breaker (BFB)

Customer

Interface

Board

Main Input

Circuit

Breaker (CB1)

Option Box

(6 slots available)

Input/Output

Connections

(Behind Inner Door)

CB Interface

Boards

20


Figure 12 Outline drawing, 250kVA Liebert NXL N+1 multi-module unit without static bypass

71.8"

(1823mm)

33.5"

(850mm)

76.8"

(1950mm)

CG

34.8"

(884mm)

17.6"

(448mm)

4.5

(115)

26.1

(664mm)

4.7 (120) (typ.)

8.3

(210)

8.5

(216)

8.5

(216)

8.5

(216)

56.8"

(1443mm)

27"

(685mm)

9.8"

(250)

3.1" (80) (typ)

9.8"

(250)

9.8"

(250)

9.8"

(250)

A

Top View (Doors Open)

12.1"

(308mm)

NOTES:

1. All dimensions are in inches (mm).

2. 24" minimum clearance above unit required

for air exhaust.

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 wiring must be run

in separate conduits.

7. Aluminum and copper-clad aluminum cables

are not recommended.

Detail A

8. Widths are with side panels. the width is 70" (1778mm) without side panels.

9. The depth dimension includes the front door and rear panel.

22.6"

(575)

21.9"

(555)

6.9"

(175)

12.8"

(324mm)

Detail B

B

21


Figure 13 Main components location, 300kVA Liebert NXL N+1 multi-module unit without static bypass

HMI Screen

EMO Button

(optional)

Liebert

IntelliSlot

Bays

®

Module Output

Circuit Breaker (CB2)

Backfeed Breaker

(BFB)

Customer

Interface

Board

Main Input

Circuit

Breaker (CB1)

Option Box

(6 slots available)

Input/Output

Cabinet

CB Interface

Boards

Doors and Inner Skins Removed

22



16.5"

(418mm)

78.5" (1993mm)

76.8"

(1950mm)

CG

30.3"

(770mm)

4.5"

(115mm)

29.9"

(759mm)

4.7"

(120mm TYP)

9.9

(253)

9.9

(253)

9.9

(253)

9.9

(253)

CG

33.4"

(849mm)

B

27.0"

(685mm)

63.8"

(1620)

11.5

(293)

11.5

(293)

11.5

(293)

3.1

NOTES:

(78 TYP)



for air exhaust.

14.7

(373)



removable access plates.



6. Control wiring and power wiring must be run

in separate conduits.

7. Aluminum and copper-clad aluminum cables

are not recommended.

8. Widths are with side panels. the width is 76.7" (1978mm)

without side panels.

9. The depth dimension includes the front door and rear panel.

A

10.5"

(266mm)

Top View

(Doors Open)

Conduit Detail: A

21.9"

(555mm)

15.0"

(380mm)

22.6"

(575mm)

Conduit Detail: B

23


Figure 15 Input/output conduit detail drawing, 250-300kVA Liebert NXL N+1 multi-module unit without static bypass

Low Voltage

1.5" Conduit

TOP VIEW

DC

(2) 3" Conduit

Bypass

(2) 3.5" Conduit

Input

Output

(2) 3" Conduit

(2) 3.5" Conduit

Low Voltage

(14) 1" Conduit

BOTTOM VIEW

Output

(2) 3.5" Conduit

Input

(2) 3" Conduit

O .56

Bypass

DC

(2) 3.5" Conduit

(2) 3" Conduit

1.75

(44)

Typ

(14)

Typ

.87

( 22)

Low Voltage

1.5" Conduit

.87 ( 22)

.98

( 25)

1.10

(28)

DETAIL A

(

1.75

44

Typ

)

(Bottom

Entry)

Shown In Extended

Position

76.8

( 1950 )

(

1.75

44

)

Typ

(Top

Entry)

Bypass

Neutral

DC Positive

DC Negative

Ground Bus

(Top Entry)

See Note 6

Bypass Input

Rectifier Input

Output

Inner Panel

Removed

For Clarity

D

B

59.4 (1509)

56.4 (1432)

52.9 (1343)

49.4 (1255)

46.4 (1178)

43.4 (1102)

40.4 (1026)

37.4 (950)

34.4 (874)

31.4 (797)

28.4 (721)

25.4 (645)

21.9 (556)

DETAIL B

1.75

( 44

)

Typ

O .56

)

Typ

O

.56

(14)

Typ

1.75

( 44 )

Typ

DETAIL C

A

Ground Bus

(Bottom Entry)

Output

Neutral

C

1.75

( 44 )

TYP

(BOTTOM

ENTRY)

1.75

( 44 )

TYP

(TOP

ENTRY)

FRONT

Notes:



for air exhaust.



removable access plates. Remove, punch to suit

conduit size and replace.

RIGHT SIDE VIEW

.0

.88 X .56 SLOT

6 PLACES

EACH BAR

DETAIL D


6. These brackets can be removed during installation but must be replaced after installation.

7. Control wiring and power wiring must be run in separate conduits.

8. Aluminum and copper-clad aluminum cables are not recommended.

9. All wiring is to be in accordance with national and local

electrical codes.

O

.56

( 14 )

TYP

24

Figure 16 Top cable entry routing and installation order

Fault Brace

Bypass Input

Fault Brace

Rectifier Input

Fault Brace

Output

FRONT VIEW

DC (Positive)

DC (Negative)

Ground

(Top Entry)

Bypass

Neutral

Bypass

Input

Fault Brace

Bypass Input

Rectifier

Input

Fault Brace

Rectifier Input

OUTPUT

Fault Brace

Output

Ground

(Bottom Entry)

Output

Neutral

SIDE VIEW


Output Conduit

Input Conduit

Bypass Conduit

DC Conduit

DC (Positive)

DC (Negative)

Bypass Neutral

Bypass Input

(Phase C)

Rectifier Input

(Phase C)

Output (Phase C)

Output Neutral

Recommended cable installation order :

1. DC Power

2. Bypass Neutral

3. Bypass Input Power

(Phases A-B-C)

4. Rectifier Input Power

(Phases A-B-C)

5. Output Power

(Phases A-B-C)

6. Output Neutral

7. Ground

The cables must be routed around the fault braces to prevent the cables from coming in contact with other busbars.

25


Figure 17 Bottom cable entry routing and installation order

Fault Brace

Bypass Input

Fault Brace

Rectifier Input

Fault Brace

Output

DC (Positive)

DC (Negative)

Ground (Top Entry)

Bypass Neutral

Fault Brace

Bypass Input

Bypass Input

Fault Brace

Rectifier Input

Rectifier

Input

Fault Brace

Output

Output

Ground (Bottom Entry)

Output Neutral

FRONT VIEW

DC (Positive)

DC (Negative)

Bypass Neutral

Bypass Input

(Phase C)

Rectifier

Input

(Phase C)

Output

(Phase C)

Output

Neutral

Input Conduit

Bypass Conduit

Output

Conduit

DC Conduit

SIDE VIEW

Recommended cable installation order :

1.) Output Neutral

2.) Output Power

(Phases A-B-C)

3.) Rectifier Input Power

(Phases A-B-C)

4.) Bypass Input Power

(Phases A-B-C)

5.) Bypass Neutral

6.) DC Power

7.) Ground

The cables must be routed around the fault braces to prevent the cables from coming in contact with other busbars.

26


Figure 18 Input/output terminal detail, 400kVA Liebert NXL

DC

(2) 3" CONDUIT

BYPASS

(2) 3.5" CONDUIT

INPUT

(2) 3" CONDUIT

OUTPUT

(2) 3.5" CONDUIT

OUTPUT

(2) 3.5" CONDUIT

INPUT

(2) 3" CONDUIT

BYPASS

(2) 3.5" CONDUIT

DC

(2) 3" CONDUIT

LOW VOLTAGE

1.5" CONDUIT

A

D

B

C

.56

(14)Typ.

1.75 (44)

Typ.

.87

(22)

.87 (22)

.98 (25)

1.1

(28)

DETAIL A

1.75 (44)

Typ.

(BOTTOM

ENTRY)

TOP VIEW

LOW VOLTAGE

(14) 1" CONDUIT

BOTTOM VIEW

LOW VOLTAGE

1.5" CONDUIT

76.8

(1950)

1.75 (44)

Typ.

(TOP

ENTRY)

BYPASS

NEUTRAL

DC POSITIVE

DC NEGATIVE

SEE NOTE 6

GROUND BUS

LOCATION

(TOP ENTRY)

BYPASS INPUT

RECTIFIER INPUT

59.4 (1509)

56.4 (1432 )

52.9 (1343)

49.4 (1255 )

46.4 (1178)

43.4 (1102 )

40.4 (1026)

37.4 (950 )

34.4 (874)

31.4 (797)

28.4 (721)

25.4 (645 )

21.9 (556)

DETAIL B

1.75 (44)

Typ.

.56

(14)Typ.

.56

(14)Typ.

1.75 (44)

Typ.

DETAIL C

OUTPUT

INNER PANEL

REMOVED

FOR CLARITY

GROUND BUS

(BOTTOM ENTRY)

OUTPUT

NEUTRAL

1.75 (44)

Typ.

(BOTTOM

ENTRY)

1.75 (44)

Typ.

(TOP

ENTRY)

0

FRONT RIGHT SIDE VIEW

.88 X .56 SLOT

6 PLACES

EACH BAR

DETAIL D

.56

(14)Typ.

NOTES:


2. 24" minimum clearance above unit required for air exhaust.


4. Top and bottom cable entry available through removable access plates. Remove, punch to suit conduit size and replace.


6. These brackets can be removed during installation but must be replaced after installation.



9. All wiring is to be in accordance with national and local electrical codes

27


Figure 19 Main components, 400kVA Liebert NXL N+1 multi-module unit without static bypass

HMI SCREEN

EMO BUTTON

OPTIONAL

EXTERNAL

INTERFACE

BOARD

(EIB)

MODULE OUTPUT

CIRCUIT BREAKER (CB2)

BACKFEED

BREAKER (BFB)

FRONT DOORS REMOVED

MAIN INPUT

CIRCUIT BREAKER (CB1)

OPTION BOX

(6 SLOTS)

DOORSAND INNER SKINS REMOVED

28



78.5

(1995)

39.4

(1000)

76.8

(1950)

25.8

(655)

3.7

(95)

29.5

( 749)

10.6

(269)

12.4

(316)

FRONT

12.4

(316)

10.6

(269) FRONT

14.5

( 368)

RIGHT SIDE VIEW

ACCESS

PLATE

32.9

(835)

CONDUIT

LANDING

AREA

(NOTE 4)

3.1

( 80 )

TYP

BOTTOM VIEW

A

DETAIL A

CONDUIT

LANDING

AREA

(NOTE4)

69.5

(1766)

TOP VIEW

B

ACCESS

PLATE

NOTES:


2. 24" minimum clearance above unit required for air exhaust.


DETAIL B

4. Top and bottom cable entry available through removable access plates.





8. Widths are with side panels. the width is 76.7" (1948mm) without side panels.

29

Figure 21 Single-input busbar arrangement


12 x4

13 x4

11 x4

13

14 x8

15 x4

3 Places

Isometric View

250, 300 and 450kVA Units

Not all parts shown for clarity

Figure 22 Low-voltage cable entry

REMOVE PLATES

FLIP PLATES

INSTALL

Low-voltage cables can be install through the top of each unit. The entry conduit landing plate is shipped inverted.

To install, remove conduit plate, flip and reinstall. Removal of side plate is for access to pull wires.

30

Specifications

5.0

S

PECIFICATIONS

Table 7 Liebert NXL UPS specifications

250 300 400

Input Parameters

Input Voltage to Rectifier, VAC

Input Voltage to Bypass, VAC

Input Voltage Range, VAC

Input Frequency, Hz

Permissible Input Frequency Range, Hz

Reflected Input THDi at Nominal Voltage at Full Load, %

Power Walk-In, sec

Bypass Neutral Current

Battery & DC Parameters

480V 3-phase, 3-wire

480V 3-phase, 3-wire or 4-wire

+10% to -15

-15% to -20%*

-20% to -30%**

<-30%***

60

55 to 65

<10% with 6-pulse & Passive Filter

1 to 30 (selectable) in 1 sec. Increment

1.7 times full-phase current

Battery Type

Nominal Battery Bus, VDC

Battery Float Voltage, VDC

Minimum End of Discharge Voltage, VDC

DC Ripple Voltage in Float & Const V Ch. Mode, %

Temperature Compensated Battery Charging

Output Parameters

Inverter Type

Output Power, kW

Output Voltage, VAC

Output Voltage Regulation, %

Output Voltage Regulation (100% Unb. Load)

Output Frequency, Hz

Output Frequency Regulation, %

Output THDv Linear Load at Nominal Voltage, %

Output THDv at Nominal Voltage

Including a 100kVA Non Linear Load per EN 62040-3, %

Capacity to Handle High Crest Factor Load

Capacity to handle Step Load, %

Transient Recovery (linear loads), %

Unbalance Loads Current Capacity

Capacity to Handle Leading PF Load

0.9 lag to Nom at 0.95 Lead

VRLA (Valve Regulated Lead Acid) or

(FLA) Flooded Lead Acid

480V

540V

384V (for VRLA / Flooded Lead Acid)

<1 (RMS value) < 3,4% Vpp

Standard (with temperature probe)

IGBT-based Sine-Sine PWM Controlled

225 270

480V 3-ph, 4-w

360

< 1% (3-phase RMS average)

< 2% (3-phase RMS average)

60

± 0.1

<2%

2.5% (max)

3:1

0-100 or 100-0

Within 5% peak-to-peak in one line cycle.

100% of nominal phase current at 0,9 Lead

Voltage Displacement, ° el

Overload Conditions, % FL

Subject to Max. kW rating

Subject to Max. kW rating

Subject to 12.5% kW derate or same Rating and 50°F (10°C) Temp. Derate

120° ±1° el (with 100% unbalanced load)

105% for 85 minutes

110% for 60 minutes

125% for 10 minutes

150% for 1 minute

* The UPS will operate at full load, but the battery charge will either be reduced or off (depending on input current).

** The UPS will operate at full load, but UPS may source share with the batteries (depending on input current).

*** UPS will be in Battery mode

31


Table 7 Liebert NXL UPS specifications (continued)

250 300 400

Physical Parameters and Standards, in (mm)

Width, With Side Panels *

Depth **

Height

SMS

Weight, Unpacked, lb. (kg) approx.

1+N

Weight, Unpacked, lb. (kg) approx.

Max heat Dissipation, Full Load, BTU/hr

Cooling Air CFM

Color

Front Door Opening (for serviceability)

Degree of Protection for UPS Enclosure

Minimum Clearance, Top, in (mm)

Minimum Clearance, Back, in (mm)

Minimum Clearance, Sides, in (mm)

Location of Cable Entrance

Standards and Conformities

71.8 (1823)

33.5 (850)

3965 (1798)

4040 (1833)

53,592

5894

78.5 (1993)

33.5 (850)

76.8 (1950)

4840 (2195)

4915 (2229)

63,036

78.5 (1993)

39.4 (1000)

6280 (2849)

6380 (2894)

77,638

7092 5894

Black (ZP-7021)

More than 180°

IP 20 (with and without front door open)

24 (610)

0

0

Top or Bottom

UL 1778, 4th Ed

CSA 22.2 107.3

FCC Part 15, Class A

FCC, Class A—Standard

IEC62040-2, Level 4, Criteria A

EN61000-4-3, Level 3, Criteria A


EN61000-2-2, Criteria A


ANSI C62.41, Category A3 &B3

ISTA Procedure 1H

WEEE

Environmental Parameters

Storage Temperature Range, °F (°C)

Operating Temperature Range, °F (°C)

Acoustical Noise, dBA

Relative Humidity

-13 to 158 (-25 to 70)

32 to 104 (0 to 40) (UPS)

68

95% or less

Non-Condensing (Operating and Non-Operating)

Maximum Altitude Above MSL, ft (m)

4920 (1500) (as per IEC 62040/3) - 1% Max kW derate / 328 rise between 4921-9842

(100m rise between 1500-3000m)

* Width dimensions are with side panels attached. Subtract 1.4" (35mm) for dimensions without side panels.

** Depth dimensions include the front door and rear panel.

32


Table 8 Current ratings—rectifier input

UPS Rating Voltage, VAC kVA kW Input Bypass Output

250 225

300 270

400 360

480

480

480

480

480

480

480

480

480

Nominal

Current

311

373

495

Maximum

Current

389

466

618

Table 9 Current ratings—bypass input

UPS Rating kVA kW

250

300

400

225

270

360

Input

480

480

480

Voltage, VAC

Bypass Output

480

480

480

480

480

480

Table 10 Current ratings—output


250

300

400

225

270

360

Input

480

480

480

Voltage, VAC

Bypass Output

480

480

480

480

480

480

Nominal

Current

301

361

481

Nominal

Current

301

361

481

Table 11 Current ratings—battery


250

300

400

225

270

360

Nominal

VDC

480

480

480

Maximum Battery

Current at EOD

618

730

980

Notes on Tables

1. Nominal input current (considered continuous) is based on full-rated output load. Maximum current includes nominal input current and maximum battery recharge current (considered noncontinuous). Continuous and noncontinuous current are defined in NEC 100.

2. Maximum input current is controlled by the current limit setting, which is adjustable. Values shown are for a maximum setting of 125%. The standard factory setting is 125%. If a smaller input feed breaker is used, the input current limit must be adjusted accordingly.

3. For units with an input transformer, the Rectifier Input Feed Breaker must be set to handle the

Liebert NXL transformer inrush of up to eight times the nominal current.

4. For breaker coordination while the module is overloaded, see the current-versus-time values on

the overload curves, Figures 23 and 24.

5. Nominal battery voltage is shown at 2.0V/cell.

33


Table 12 Recommended conduit and cable sizes

Rectifier Input


250

300

400

225

270

360

480

480

480

480

480

480

480

480

480

Nominal Selection

(#) Conduit Size, Ph, G

(2) 2.5C 3-250kcmil,

#1/0AWG

(2) 3C 3-350kcmil,

#1/0AWG

(2) 3.5C 3-500kcmil,

#1/0AWG

Bypass Input


250

300

400

225

270

360

480

480

480

480

480

480

480

480

480


(#) Conduit Size, Ph, N, G

(2) 3C 3-250kcmil,

2-250kcmil, #1/0AWG

(2) 3.5C 3-350kcmil,

2-350kcmil, #1/0AWG

(2) 4C 3-500kcmil,

2-500kcmil, #1/0AWG

Output

UPS Rating kVA

250

300

400

kW

225

270

360

Input

480

480

480

Voltage, VAC

Bypass Output

480

480

480

480

480

480


(#) Conduit Size, Ph, N, G

(2) 3C 3-250kcmil,

2-250kcmil, #1/0AWG

(2) 3.5C 3-350kcmil,

2-350kcmil, #1/0AWG

(2) 4C 3-500kcmil,

2-500kcmil, #1/0AWG

Battery


250

300

400

Bonding

225

270

360

480

480

480

480

480

480

480

480

480


(#) Conduit Size, Ph, G

(2) 2.5C 2-350kcmil, #1/0AWG

(2) 3C 2-500kcmil, #1/0AWG

(3) 2.5C 2-500kcmil, #2/0AWG

UPS Rating kVA kW Input

Voltage, VAC

Bypass Output

Main Bonding Jumper/Grounding

Electrode Conductor

250

300

225

270

480

480

480

480

480

480

(1) #1/0AWG/ (1) #1/0AWG

(1) #2/0AWG/ (1) #2/0AWG

400 360 480 480 480 (1) #2/0AWG/ (1) #2/0AWG

1. Recommended cable sizes are 167°F (75°C) (THW) wire at 86°F (30°C) ambient.

2. For continuous operations not at 86°F (30°C), recommend that the site planner chose the appropriate cable type based on the particular installation requirements.

34

Figure 23 Inverter overload data


35

Time, seconds

Continuous

Figure 24 Bypass overload data


36

Time, Seconds

Continuous


Table 13 Recommended lug sizes

Cable Size

T&B Series 54000

One Hole

T&B Series 54000

Two Hole

#8 AWG

#6 AWG

#4 AWG

#2-3 AWG

#1 AWG

#1/0 AWG

#2/0 AWG

54930BE

54905BE

54906BE

54942BE

54947BE

54950BE

54951BE

54850BE

256-30695-868

256-30695-733

54811BE

54857BE

256-30695-593

54862BE

#3/0 AWG

#4/0 AWG

250kcmil

300kcmil

350kcmil

400kcmil

500kcmil

600kcmil

54965BE

54970BE

54913BE

54914BE

54915BE

54916BE

54918BE

54920BE

54864BE

54866BE

54868BE

54870BE

54872BE

54874BE

54876BE

54878BE

750kcmil 54922BE 54880BE

Use the T&B crimping tools recommended for these types of lugs.

Table 14 Recommended torque values

Grade 5 Steel – Unified Thread System Torque Units - lbf.*in.

Size

1/4

5/16

3/8

7/16

1/2

Fastener

Finish =>

9/16

14

20

13

20

12

18

Threads/

Inch, T pi

20

28

18

24

16

24

Plain Steel

No Washer/

Flat Washer

Lock

Washer

593

662

904

1,020

1,305

1,456

101

116

209

231

370

420

—

—

934

1,050

—

—

—

—

224

246

392

442

Class 8.8 Steel – Metric Thread System Torque Units - N*m

Zinc Plating

No Washer/

Flat Washer

534

596

814

918

1,175

1,310

91

104

188

208

333

378

Lock

—

—

203

223

355

400

—

—

844

948

—

—

M5

M6

M8

Fastener

Finish =>

Washer Size

M10

M12

M14

Thread

Pitch T

0.8

0.5

1

0.75

1.25

1

1.5

1.25

1.75

1.25

2

1.5

p

Plain Steel

No Washer/

Flat Washer

6.1

6.9

10

11

25

27

50

53

87

95

139

151

Lock

Washer

—

—

—

—

—

—

64

67

128

136

—

—

Zinc Plating

No Washer/

Flat Washer

5.5

6.2

9

10

23

24

45

47

78

86

125

136

Lock

Washer

59

61

119

127

—

—

—

—

—

—

—

—

37

38


Ensuring The High Availability

Of Mission-Critical Data And Applications.

Emerson Network Power, a business of Emerson (NYSE:EMR), is the global leader in enabling

Business-Critical Continuity

™

from grid to chip for telecommunication networks, data centers, health care and industrial facilities. Emerson Network Power provides innovative solutions and expertise in areas including

AC and DC power and precision cooling systems, embedded computing and power, integrated racks and enclosures, power switching and controls, infrastructure management, and connectivity. All solutions are supported globally by local

Emerson Network Power service technicians. Liebert AC power, precision cooling and monitoring products and services from Emerson Network Power deliver Efficiency Without

Compromise

™

by helping customers optimize their data center

infrastructure to reduce costs and deliver high availability.

While every precaution has been taken to ensure the accuracy and completeness of this literature, Liebert Corporation assumes no responsibility and disclaims all liability for damages resulting from use of this information or for any errors or omissions.

© 2010 Liebert Corporation

All rights reserved throughout the world. Specifications subject to change without notice.

® Liebert is a registered trademark of Liebert Corporation.

All names referred to are trademarks or registered trademarks of their respective owners.

SL-25420_REV8_11-11

Emerson Network Power.

The global leader in enabling Business-Critical Continuity ™

AC Power

Connectivity

DC Power

Embedded Computing

Embedded Power

Infrastructure Management & Monitoring

Outside Plant

Power Switching & Controls

Precision Cooling

Technical Support / Service

Web Site

www.liebert.com

Monitoring

[email protected]

800-222-5877

Outside North America: +00800 1155 4499

Single-Phase UPS & Server Cabinets

[email protected]

800-222-5877

Outside North America: +00800 1155 4499

Three-Phase UPS & Power Systems

800-543-2378

Outside North America: 614-841-6598

Environmental Systems

800-543-2778

Outside the United States: 614-888-0246

Locations

United States

1050 Dearborn Drive

P.O. Box 29186

Columbus, OH 43229

Europe

Via Leonardo Da Vinci 8

Zona Industriale Tognana

35028 Piove Di Sacco (PD) Italy

+39 049 9719 111

Fax: +39 049 5841 257

Asia

29/F, The Orient Square Building

F. Ortigas Jr. Road, Ortigas Center

Pasig City 1605

Philippines

+63 2 687 6615

Fax: +63 2 730 9572

EmersonNetworkPower.com

Racks & Integrated Cabinets

Services

Surge Protection

Emerson, Business-Critical Continuity, Emerson Network Power and the Emerson Network Power logo are trademarks of Emerson Electric Co. or one of its affiliated companies.

©2010 Emerson Electric Co.

Liebert NXL Installation manual

Liebert

®

NXL

™

Installation Manual – 250-400kVA, 60Hz, Three-Phase, Single-Module

AC Power

For Business-Critical Continuity™

ONTACTING

MERSON

ETWORK

OWER FOR

UPPORT

MPORTANT

AFETY

NSTRUCTIONS

SAVE THESE INSTRUCTIONS

INGLE

ODULE

ECHANICAL

NSTALLATION

1.3.1 UPS Room

1.3.2 Storage

1.4.1 Moving the Cabinets

1.4.2 Clearances

1.4.3 Raised Floor Installations

1.4.4 Kick Plate Installation

1.4.5 Special Considerations for 1+N Parallel Systems

LECTRICAL

NSTALLATION

Dual Input

2.2.1 Sizing the Input Breaker Feeding a Liebert NXL UPS

2.2.2 Power Cable Connection Procedure

Detail A

FRONT

REAR

2.3.1 Dry Contacts

2.3.2 Multi-Module Communication

UPS 3

UPS 3

2.5.1 Four-Wire Input connections

2.5.2 Three-Wire Input Connections

2.5.3 Preferred Grounding Configuration, Battery Systems

2.5.4 Multi-Module Systems

2.5.5 High Resistance Ground Systems

PTIONAL

QUIPMENT

3.1.1 Matching Maintenance Bypass Cabinet

3.1.2 Battery Temperature Sensor

3.1.3 Matching Liebert NXL Battery Cabinet

3.1.4 Matching Module Battery Disconnect—MBD

3.1.5 Load Bus Synch

3.1.6 Remote Alarm Panel

3.2.1 Alber Monitoring System

NSTALLATION

RAWINGS

71.8"

(1823mm)

33.5"

(850mm)

76.8"

(1950mm)

CG

34.8"

(884mm)

17.6"

(448mm)

26.1

(664mm)

56.8"

(1443mm)

27"

(685mm)

Top View (Doors Open)

12.1"

(308mm)

22.6"

(575)

21.9"

(555)