Vertiv Liebert NXL Series User manual

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ИБП Liebert NXL (250-1100 кВА) - руководство по эксплуатации. Юниджет
Постоянная ссылка на страницу: https://www.uni-jet.com/catalog/istochniki-
besperebojnogo-pitaniya/on-line-ibp-100-kva/liebert-chloride-nxl.html

Liebert®NXL™
Operation and Maintenance Manual—250-1100kVA, 60Hz, Three Phase,
Single-Module & Multi-Module UPS

©2016 Vertiv Co. All rights reserved throughout the world.
This document may contain confidential and/or proprietary information of Liebert Corporation, and its receipt or possession
does not convey any right to reproduce, disclose its contents, or to manufacture or sell anything that it may describe.
Reproduction, disclosure, or use without specific authorization from Liebert Corporation is strictly prohibited.
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 on page -1 and 4.4 - Battery Maintenance.
CONTACTING VERTIV FOR SUPPORT
Contact Vertiv Liebert®Services for information or repair service in the United States at 1-800-LIEBERT (1-800-543-2378).
For repair or maintenance service outside the 48 contiguous United States, contact Liebert Services, if available in your area.
For areas not covered by Liebert Services, the authorized distributor is responsible for providing qualified, factory-authorized
service.
Have the following information available before calling Liebert Services:
Part Numbers: _____________________________________________________________________________________________________
Serial Numbers: ____________________________________________________________________________________________________
kVA Rating: ________________________________________________________________________________________________________
Date Purchased: ___________________________________________________________________________________________________
Date Installed: _____________________________________________________________________________________________________
Location: ___________________________________________________________________________________________________________
Input Voltage/Frequency: _________________________________________________________________________________________
Output Voltage/Frequency: _______________________________________________________________________________________
DC Source 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.
!
WARNING
Internal battery strapping must be verified by manufacturer prior to moving a battery cabinet (after initial
installation).
• Battery cabinets contain non-spillable batteries.
• Keep units upright.
•Donotstack.
• Do not tilt.
Failure to heed this warning could result in smoke, fire or electric hazard.
Call 1-800-LIEBERT before moving battery cabinets (after initial installation).
For systems using DC sources other than batteries, refer to the manufacturer's recommendations for
handling and care.

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TABLE OF CONTENTS
BATTERY CABINET PRECAUTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
CONTACTING VERTIV FOR SUPPORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INSIDE FRONT COVER
IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
1.2 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
1.2.1 Normal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2.2 Bypass Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2.3 Battery Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2.4 Maintenance Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2.5 ECO Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2.6 Intelligent Paralleling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
2.0 OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Touchscreen Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
2.2.1 Main Display Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
2.2.2 Configurations Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.3 Event Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
2.4 Status Reports Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
2.5 Startup Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
2.6 Shutdown Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.7 Transfer Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.8 Battery Management Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.9 System View—1+N Systems Only. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.10 Metering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.11 Help. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.12 Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.13 Silence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.14 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.14.1 Load on Bypass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.14.2 OK to Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2.14.3 Input Power Failure—Load on DC Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
2.14.4 Off DC Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
2.14.5 Emergency Module Off (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
2.14.6 Remote Emergency Power Off. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
2.14.7 ECO Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

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2.15 Manual Operations—All Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
2.15.1 Startup—Single Module System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
2.15.2 Startup—N+1 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
2.15.3 Startup—1+N System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
2.15.4 Load Transfer and Retransfer—Single Module System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
2.15.5 Maintenance Bypass Load Transfers—Single Module System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
2.15.6 Load Transfer—N+1 System: Remove UPS from N+1 System (Collective) . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
2.15.7 Load Transfer—N+1 System: Add UPS to N+1 System (Collective) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
2.15.8 Load Transfer—1+N System: Remove a UPS from System (Collective) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
2.15.9 Load Transfer—1+N System: Add a UPS to the System (Collective) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
2.15.10 Load Transfer—1+N System: Transfer System to Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
2.15.11 Load Transfer—1+N System: Transfer System to Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
2.15.12 Load Transfer—1+N System: Transfer to Maintenance Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
2.15.13 Shutdown—Single Module UPS System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
2.15.14 Shutdown—N+1 UPS System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
2.15.15 Shutdown—1+N UPS: UPS Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
2.15.16 Shutdown—1+N UPS: System Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
2.15.17 1+N System Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
2.16 Automatic Operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
2.16.1 Overloads (Without Transfer) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
2.16.2 Automatic Transfers to Bypass (Overload Condition). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
2.16.3 Automatic Transfers to Bypass, UPS System Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
2.16.4 Automatic Retransfers to UPS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
3.0 OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
3.1 Input Contact Isolator Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
3.2 Programmable Relay Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
3.2.1 Configuring the Programmable Relay Board Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
3.3 Remote Alarm Status Panel RAS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
3.3.1 Lamp Test/Reset Push button. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
3.3.2 Audio Reset Push button. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
3.4 Digital Load Bus Sync . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
3.4.1 System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
3.4.2 LBS Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
3.4.3 Normal Operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
3.4.4 Slave Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
3.4.5 Master System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
3.4.6 Slave System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
3.5 ECO Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
3.5.1 ECO Mode Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
3.5.2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
3.5.3 Bypass Qualification limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
3.5.4 Conditions to Activate ECO Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
3.5.5 Conditions to Suspend ECO Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
3.5.6 Conditions to Terminate ECO Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

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3.6 Intelligent Paralleling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
3.6.1 Intelligent Paralleling Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
3.6.2 Intelligent Paralleling Target Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
3.6.3 Conditions to Activate Intelligent Paralleling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
3.6.4 Conditions to Suspend Intelligent Paralleling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
3.6.5 Intelligent Paralleling Module Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
3.6.6 Module Standby Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
4.0 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
4.1 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
4.2 Liebert Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
4.2.1 Professional Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
4.3 Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
4.3.1 Record Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
4.3.2 Air Filters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
4.3.3 Limited Life Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
4.4 Battery Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
4.4.1 Battery Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
4.5 Detecting Trouble. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
4.6 Reporting a Problem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
4.7 Corrective Actions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
4.8 Upstream Feeder Circuit Breaker Setting Inspections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
5.0 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
5.1 DC Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
5.1.1 Battery Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
5.2 Other DC Sources. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
5.3 Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
APPENDIX A-UPSALARM AND STATUS MESSAGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A75

iv
FIGURES
Figure 1 Typical single module UPS system one-line diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Figure 2 Main component locations—250 to 400kVA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Figure 3 Main component locations—500kVA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Figure 4 Main components, 625kVA Liebert NXL, N+1 multi-module unit without static bypass . . . . . . . . . . 6
Figure 5 Main components, 625kVA Liebert NXL UPS, SMS and 1+N multi-module unit with static
bypass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 6 Main component locations—750kVA with Static Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Figure 7 Main component locations—750kVA without Static Bypass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Figure 8 Main component locations—800kVA with Static Bypass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Figure 9 Main components, 1+N multi-module or SMS with static bypass, 1100kVA UPS . . . . . . . . . . . . . . . . . 9
Figure 10 Main components, 1100kVA UPS N+1 multi-module without static bypass . . . . . . . . . . . . . . . . . . . . . .10
Figure 11 Main Display Screen, typical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 12 Mimic display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 13 Monitor/mimic display example: Normal power flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 14 Monitor/mimic display example: Utility fail. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Figure 15 Monitor/mimic display example: load on bypass, UPS On. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Figure 16 Monitor/mimic display example: load on bypass, UPS module Off. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Figure 17 Rating Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Figure 18 System Settings parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Figure 19 Adjustable setpoints parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Figure 20 Battery Equalize settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 21 Battery Management Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Figure 22 Typical Event Management Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Figure 23 UPS shutdown pop-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 24 System shutdown pop-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 25 Time remaining display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Figure 26 Battery cycle monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 27 Battery cycle monitor summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 28 Status View - 1+N systems only. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 29 1+N status view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 30 Load on bypass (UPS not available). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 31 Load on bypass, UPS available. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 32 Load on UPS, bypass available. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 33 Input power fail, load on DC source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 34 Load on UPS, DC source not available. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 35 Emergency modules off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 36 Remote emergency power off. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 37 ECO Mode power flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 38 Startup commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Figure 39 1+N system start menu commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 40 UPS with two-breaker bypass cabinet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 41 N+1 Transfer menu commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 42 1+N UPS Transfer to Bypass menu commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 43 1+N UPS Transfer to Inverter menu commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

v
Figure 44 1+N System Transfer menu commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Figure 45 N+1 Shutdown menu commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Figure 46 1+N UPS shutdown menu commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Figure 47 1+N System Shutdown menu commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Figure 48 Current-versus-time curves of overload capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Figure 49 Input contact isolator dialog box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Figure 50 Optional Input Contact Isolator Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Figure 51 Control wiring, Programmable Relay Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Figure 52 Programmable relay board dialog box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Figure 53 LBS configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Figure 54 ECO Mode settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Figure 55 ECO Mode scheduling—overall and example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Figure 56 Intelligent Paralleling settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Figure 57 Module standby rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
TABLES
Table 1 Input Contact Isolator Board pre-assigned values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Table 2 Input Contact Isolator Board control wiring connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Table 3 Programmable Relay Board pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Table 4 RAS indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 5 UPS component service life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Table 6 Battery voltage, nominal and float . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Table 7 Battery retorque values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Table 8 Environmental specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Table 9 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Table 10 Liebert NXL physical parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Table 11 Liebert NXL alarm and status messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

vi

Important Safety Instructions
Vertiv | Liebert®NXL™250-1100kVA, 60Hz, Three Phase, SMS & MMS UPS Operation and Maintenance Manual 1
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important instructions that should be followed during installation and maintenance of your
Liebert NXL UPS and DC source.
This equipment contains circuitry that is energized with high voltage. Only test equipment designated 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 voltage may exist at the capacitor banks.
Observe all DC source precautions when near the DC source for any reason.
ONLY properly trained and qualified service personnel should perform maintenance on the UPS system.
When performing maintenance on any part of the equipment under power, service personnel and test equipment
should be standing on rubber mats. The service personnel should wear insulating shoes for isolation from direct
contact with the floor (earth ground).
One person should never work alone. A second person should be standing by to assist and summon help in case
an accident should occur. This is particularly true when work is performed on the DC source.
!
WARNING
Risk of electric shock. Can cause equipment damage, injury or death.
Exercise extreme care when handling UPS cabinets to avoid equipment damage or injury to personnel.
Refer to separate installation manual for equipment handling information and installation procedures.
Follow all DC source safety precautions in 4.0 - Maintenance when installing, charging or servicing DC
sources. In addition to the hazard of electric shock, gas produced by batteries can be explosive and
sulfuric acid can cause severe burns.
In case of fire involving electrical equipment, use only carbon dioxide fire extinguishers or others
approved for use in electrical fire fighting.
Extreme caution is required when performing maintenance. Service and maintenance work must be
performed only by properly trained and qualified personnel and in accordance with applicable regulations
as well as with manufacturers’ specifications.
Be constantly aware that the UPS system contains high DC as well as AC voltages. With input power off
and the DC source disconnected, high voltage at filter capacitors and power circuits should be
discharged within 5 minutes. However, if a power circuit failure has occurred, assume that high voltage
still exists after shutdown. Check with a voltmeter before making contact.
AC voltage will remain on the system bypass, the UPS output terminals and the static bypass switch,
unless associated external circuit breakers are opened.
Check for voltage with both AC and DC voltmeters prior to making contact.
When the UPS system is under power, both the operator and any test equipment must be isolated from
direct contact with earth ground and the UPS chassis frame by using rubber mats.
Some components within the cabinets are not connected to the chassis ground. Any contact between
floating circuits and the chassis is a lethal shock hazard. Exercise caution that the test instrument exterior
does not make contact, either physically or electrically, with earth ground.
!
WARNING
Risk of hazardous voltage. Can cause equipment damage, injury or death.
When the UPS goes into stored energy mode, the operator must isolate the UPS input terminals to
prevent energy transfer between power sources. The operator must then use a voltmeter to check for
hazardous voltage between all terminals, including protective earth.

Introduction
Vertiv | Liebert®NXL™250-1100kVA, 60Hz, Three Phase, SMS & MMS UPS Operation and Maintenance Manual 2
1.0 INTRODUCTION
1.1 GENERAL DESCRIPTION
The Liebert NXL UPS provides continuous, high-quality AC power to your business-critical equipment, such as
telecommunications and data processing equipment. The Liebert NXL UPS supplies power that is free of the
disturbances and variations in voltage and frequency common to utility power, which is subject to brownouts,
blackouts, surges and sags.
The Liebert NXL utilizes the latest in high-frequency, double-conversion pulse-width modulation technology
and fully digital controls to enhance its reliability and increase the ease of use.
As shown in Figure 1, the AC utility source is input at CB1 and the rectifier converts the AC utility into DC power.
The inverter converts that DC power from the utility—or DC power from the DC source— into AC power for the
load. The DC source will power the load through the inverter in the event of a power failure. The utility source can
also power the load through the static bypass.
If maintenance or repair of the UPS is necessary, the load can be switched without interruption in service to the
optional maintenance bypass.
Figure 1 Typical single module UPS system one-line diagram
1.2 MODES OF OPERATION
1.2.1 Normal Mode
Operating in normal mode, the Liebert NXL’s rectifier derives power from a utility AC source and supplies
regulated DC power to the inverter, which regenerates precise AC power to supply the connected equipment.
The rectifier also uses the utility source power to charge the DC sources.
1.2.2 Bypass Mode
When the Liebert NXL is in bypass mode, the load is directly supported by utility power and is without DC source
backup protection.
The Liebert NXL’s inverter and bypass static switch will shift the load from the inverter to bypass mode without
an interruption in AC power if the inverter is synchronous with the bypass and any of the following occurs:
• Inverter fails
• Inverter overload capacity is exceeded
• Inverter is manually turned off by the user
Bypass
Input
DC Source
DC Bus Module
Output
BFB
CB2CB1
MBD

Introduction
Vertiv | Liebert®NXL™250-1100kVA, 60Hz, Three Phase, SMS & MMS UPS Operation and Maintenance Manual 3
1.2.3 Battery Mode
When utility AC power fails, the Liebert NXL protects the critical load by instantaneously channeling DC source
power to the inverter, which continues supporting the critical load without interruption.
When utility power returns and is within acceptable limits, the Liebert NXL automatically shifts back to Normal
mode, with the rectifier powering the critical load.
1.2.4 Maintenance Bypass
The installation of a Maintenance Bypass Cabinet or Assembly is recommended to allow you to totally isolate the
UPS from all power sources. Use of the Maintenance Bypass is described in 2.0 - Operation.
1.2.5 ECO Mode
The ECO Mode feature improves the overall efficiency by powering the critical bus from the bypass static switch
instead of the inverter.
The user has the ability to start/stop ECO Mode manually via HMI or automatically based on time and day of
week schedule entries.
When the critical bus goes out of tolerance (voltage, frequency or slew rate), the BPSS is turned off and the
inverter powers the critical bus.
The inverter is always ready to take the load in the event that the bypass source fails.
1.2.6 Intelligent Paralleling
Intelligent Paralleling is intended to increase system efficiency and to reduce the operating hours on the
modules. Intelligent Paralleling will put one or more paralleled modules into standby operation when the number
of redundant modules is above the user-specified threshold, plus some hysteresis.
1.3 OPTIONS
A number of options are available from Vertiv for your UPS system. (Some options are not available for all
ratings.) Described below are the most frequently provided options. Other options are available. Contact your
Vertiv sales representative for more information.
•Battery and Racks—The batteries provide power in the event of a power outage. The Liebert NXL UPS can use a variety of
battery types, provided the battery plant is designed for the UPS DC voltage range and the load requirements of your
application.
•Battery Cabinets—Valve-regulated, lead-acid (VRLA) sealed batteries are available in matching cabinets for convenient
installation and maintenance in otherwise unprotected space. Depending on the UPS module rating, two or more cabinets
may be connected in parallel to provide the additional run time. This option is required to complete the UPS system.
•Module Battery Disconnect—The UPS system utilizes a separate Module Battery Disconnect for remotely located
batteries. A sensing circuit in the UPS module, set at the battery low voltage limit, trips the Module Battery Disconnect to
safeguard the battery from excessive discharge. The Module Battery Disconnect has an undervoltage release mechanism
designed to ensure that during any shutdown or failure mode all battery potential is removed from the UPS system.
•Two Breaker Maintenance Bypass—This switchboard provides make-before-break maintenance bypass. It includes:
Maintenance Bypass Breaker (MBB) and Maintenance Isolation Breaker (MIB).
•Load Bus Synchronization—The Load Bus Sync (LBS) option keeps two or more independent UPS systems (and therefore
their critical load buses) in sync, even when the modules are operating on DC source or asynchronous AC sources. This
means that critical loads connected to both load buses can switch seamlessly between the two.
•Customer Alarm Interface—This optional interface board allows the input and display of eight alarms from customer-
supplied contacts, each with a customer-selected name.
•Temperature-Compensated Charging—When the battery temperature exceeds a preset limit (typically 77°F [25°C]), this
optional circuit proportionally reduces float charging voltage to prevent overcharging the battery.
•Battery Load Testing—When activated, this option forces the battery string to assume the load for a short period of time.
NOTE
If the inverter is asynchronous with the bypass, the static switch will transfer the load from the inverter to the
bypass WITH interruption in AC power to the critical load. This interruption will be less than 10ms. This
interruption time may be altered by modifying the Output transfer interrupt time setting.

Operation
Vertiv | Liebert®NXL™250-1100kVA, 60Hz, Three Phase, SMS & MMS UPS Operation and Maintenance Manual 4
2.0 OPERATION
The Liebert NXL UPS is equipped with a microprocessor-based display touchscreen designed for convenient
and reliable operation. The display is driven by an easy-to- follow, menu-prompted software.
2.1 FEATURES
The Liebert NXL interface display enables the operator to perform such tasks as:
• Quickly check operational status
• Monitor the power flow through the UPS system and all meter readings
• Execute operational procedures
• Check status reports and history files
• Adjustment programmable parameters (access limited by security access function)
The touchscreen is a white-background display with multicolor text. The display turns on automatically, but after
15 minutes of inactivity the back-light will go out and the display will appear very dim. Touching the screen will
reactivate the back-light; the back-light will again be active for 15 minutes. If any screen other than the mimic
screen is accessed, that screen will be displayed for 5 minutes without any interaction. If there is no activity for 5
minutes, the display will revert to the basic mimic screen.
Figure 2 Main component locations—250 to 400kVA
External
Interface
Board
Input/Output
Connections
(Behind
Inner Door)
Liebert
IntelliSlot
Housings
EPO Button
HMI Screen
Module Output
Circuit Breaker
(CB2)
Main Input
Circuit Breaker
(CB1)
Backfeed
Breaker (BFB)

Operation
Vertiv | Liebert®NXL™250-1100kVA, 60Hz, Three Phase, SMS & MMS UPS Operation and Maintenance Manual 5
Figure 3 Main component locations—500kVA
Option Box
(6 Slots)
Liebert IntelliSlot
Housings
Main Input
Circuit Breaker
(CB1) Module Output
Circuit Breaker (CB2)
Backfeed Circuit
Breaker (BFB)
Input Busbars
Doors and Inner Skins Removed
Front Doors Removed
Keylock or EMO Button
(Optional)
HMI Screen
Inter-Module Communication
Board, Behind HMI Screen
Bypass Busbars
Input Ground
Output Ground
Output Busbars
DC (-) Input
DC (+) Input

Operation
Vertiv | Liebert®NXL™250-1100kVA, 60Hz, Three Phase, SMS & MMS UPS Operation and Maintenance Manual 6
Figure 4 Main components, 625kVA Liebert NXL, N+1 multi-module unit without static bypass
Figure 5 Main components, 625kVA Liebert NXL UPS, SMS and 1+N multi-module unit with static bypass
Liebert
IntelliSlot
Housings
HMI Screen
Inter-Module
Communication Board
(IMC) (behind door)
EMO Button
(Optional)
Main Input
Circuit Breaker
(CB1)
Module Output
Circuit Breaker
(CB2)
FRONT DOORS REMOVED
Liebert
IntelliSlot
Housings
Main Input
Circuit Breaker (CB1)
Module Output
Circuit Breaker
(CB2)
Backfeed
Circuit Breaker
(BFB)
Keylock or
EMO Button
(Optional)
FRONT DOORS NOT SHOWN
HMI Screen
Inter-Module
Communication
Board (Behind
HMI Screen)

Operation
Vertiv | Liebert®NXL™250-1100kVA, 60Hz, Three Phase, SMS & MMS UPS Operation and Maintenance Manual 7
Figure 6 Main component locations—750kVA with Static Bypass
Figure 7 Main component locations—750kVA without Static Bypass
HMI
Screen
Liebert
IntelliSlot
Housings
Main Input
Circuit
Breaker (CB1)
Module Output
Circuit Breaker
(CB2)
Backfeed
Circuit
Breaker (BFB)
Key Lock or
EMO Button
(Optional)
FRONT DOORS NOT SHOWN
Inter-Module
Communication Board
(Behind HMI Screen)
FRONT DOORS NOT SHOWN
Liebert
IntelliSlot
Housings
HMI Screen
Inter-Module
Communication Board
(Behind HMI Screen)
Key Lock or
EMO Button
(Optional)
Main Input
Circuit Breaker
(CB1)
Module Output
Circuit Breaker
(CB2)

Operation
Vertiv | Liebert®NXL™250-1100kVA, 60Hz, Three Phase, SMS & MMS UPS Operation and Maintenance Manual 8
Figure 8 Main component locations—800kVA with Static Bypass
FRONT DOORS REMOVED
Rectifier Split Inverter Split Bypass/Output SplitDC Input Split
Backfeed
Breaker
Output
Circuit
Breaker
(CB2)
Liebert IntelliSlot
Housings
Main Input
Circuit Breaker
(CB1)
Intermodule
Communication
Board (Behind
HMI Screen)
HMI Screen
Keylock or
EMO Button
(Optional)

Operation
Vertiv | Liebert®NXL™250-1100kVA, 60Hz, Three Phase, SMS & MMS UPS Operation and Maintenance Manual 9
Figure 9 Main components, 1+N multi-module or SMS with static bypass, 1100kVA UPS
FRONT DOORS REMOVED
INPUT CABINET RECTIFIER CABINET DC CABINET INVERTER CABINET
HMI SCREEN (OPTIONAL)
INTER-MODULE COMMUNICATION BOARD
(LOCATED BEHIND HMI SCREEN) HMI KEYLOCK OR EMO BUTTON
BYPASS / OUTPUT CABINET
BACKFEED BREAKER
OUTPUT
CIRCUIT
BREAKER
(CB2)
BYPASS
STATIC
SWITCH
MAIN
INPUT
CIRCUIT
BREAKER
(CB1)
CONTROL CABLE BOX

Operation
Vertiv | Liebert®NXL™250-1100kVA, 60Hz, Three Phase, SMS & MMS UPS Operation and Maintenance Manual 10
Figure 10 Main components, 1100kVA UPS N+1 multi-module without static bypass
Front Doors Removed
Main Input Circuit Breaker (CB1)
Output Circuit Breake
r
(CB2)
Input Cabinet Rectifier Cabinet DC Cabinet Inverter Cabinet Output Cabinet
HMI Screen (Optional)
Inter-module Communication Board (Located Behind HMI Screen) HMI Keylock Or EMO Button
Control Cable Box

Operation
Vertiv | Liebert®NXL™250-1100kVA, 60Hz, Three Phase, SMS & MMS UPS Operation and Maintenance Manual 11
Figure 11 Main Display Screen, typical
Figure 12 Mimic display
Bypass Input—Displays the bypass input voltage and the bypass input frequency. The bypass circuit breaker
(BFB) is to the right of this block. The circuit breaker status is shown as open or closed.
UPS Input Power—Displays the UPS input voltage, current and frequency. The input circuit breaker (CB1) is to
the right of this block. The circuit breaker status is shown as open or closed.
Battery Block—Displays the DC source voltage and the charge or discharge current to or from the DC source.
Pressing this icon switches among the connected DC sources. The Module Battery Disconnect (MBD) is to the
right of this block. The circuit breaker status is shown as open or closed.
DC Bus—Displays the DC Bus voltage and the state of the charger.
Load—Displays the output line voltage, phase voltage, current, kVA, kW, power factor and frequency. The critical
load current per phase is also displayed in this block. During an overload, the time remaining before transfer is
displayed at the bottom of the load box. After an overload transfer, retransfer timeout is displayed at the bottom
of the load box.
NOTE
This Bypass Input information does not apply to N+1 multi-module systems
Mimic
Display
Active
Event
Window
Multipurpose
Display
Menu
Bar
INPUT
ABC
L-L000V
I 000A
Freq 0.0Hz
BATTERY1 OF 4
Voltage Disable
Temp Disable
T
BYPASS
ABC
L-L000V
Freq 0.0Hz
Voltage 0V
Current Float
CB1
BFB
MBD
BIS1
CB2
Legend
Inlet Air Temp 0°C
ABC
L-L 0 0 0 V
L-N 0 0 0 V
I000A
KVA 0 0 0 %
KW 0 0 0 %
PF 0.0 0.0 0.0
KVA/KW 0/ 0
Freq 0.0Hz
Rexfer Timeout 00:00
MODULE OUTPUT
DC BUS
Bypass
Input
UPS
Input
Power
Battery
Block
Load