Emerson NXL 250 Specifications

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

IntroductionLiebert® NXL™21.0 INTRODUCTION1.1 General DescriptionThe Liebert NXL UPS provides continuous, high-quality AC power to your business-criti

UPS Alarm and Status MessagesLiebert® NXL™92Low BattCapacityOne or more battery circuit breakers are open.This alarm applies if the system includes mo

UPS Alarm and Status Messages93 Liebert® NXL™MainControlFaultThe UPS has transferred to Bypass due to a loss of communications with the Main Controlle

UPS Alarm and Status MessagesLiebert® NXL™94ManualXferInhibitThis summary event means the conditions required to perform a manual transfer to bypass a

UPS Alarm and Status Messages95 Liebert® NXL™Max LoadAlarm Ph BThe user adjustable maximum load alarm threshold was exceeded. This is a “notification

UPS Alarm and Status MessagesLiebert® NXL™96MMSXferInhibitThis summary event means the conditions required to perform a transfer to bypass are not met

UPS Alarm and Status Messages97 Liebert® NXL™OutletOvtempLimitThe difference between the inlet air temperature and the outlet air temperature is too g

UPS Alarm and Status MessagesLiebert® NXL™98RectifierFaultThis summary event indicates a potentially serious condition in the Rectifier circuit. The c

UPS Alarm and Status Messages99 Liebert® NXL™RegenTerminatedRegeneration Mode is a service mode that is normally controlled by the service technician.

UPS Alarm and Status MessagesLiebert® NXL™100SystemCommFailThe control has detected a communication failure of a device on the multi-module communicat

UPS Alarm and Status Messages101 Liebert® NXL™System OutputBreaker (UOB)OpenThe system output breaker indicates that it is in the open position.System

Introduction3Liebert® NXL™1.2 Modes of Operation1.2.1 Normal ModeOperating in normal mode, the Liebert NXL’s rectifier derives power from a utility AC

UPS Alarm and Status MessagesLiebert® NXL™102NOTES

Ensuring The High AvailabilityOf Mission-Critical Data And Applications.Emerson Network Power, a business of Emerson (NYSE:EMR),is the global leader i

IntroductionLiebert® NXL™41.3 OptionsA number of options are available from Emerson® for your UPS system. (Some options are not available for all rati

Operation5Liebert® NXL™2.0 OPERATIONThe Liebert NXL UPS is equipped with a microprocessor-based display touchscreen designed for convenient and reliab

OperationLiebert® NXL™6Figure 3 Main component locations—500kVAU40-5C-2000Rev. 1Option Box(6 Slots)Liebert IntellislotHousingsMain Input CircuitBreake

Operation7Liebert® NXL™Figure 4 Main components, 625kVA Liebert NXL, N+1 multi-module unit without static bypassFigure 5 Main components, 625kVA Liebe

OperationLiebert® NXL™8Figure 6 Main component locations—750kVA with Static BypassFigure 7 Main component locations—750kVA without Static BypassHMIScr

Operation9Liebert® NXL™Figure 8 Main components, 1+N multi-module or SMS with static bypass, 1100kVAw UPSFRONT DOORS REMOVEDINPUT CABINET RECTIFIER CA

OperationLiebert® NXL™10Figure 9 Main components, 1100kVA UPS N+1 multi-module without static bypassFRONT DOORS REMOVEDMAIN INPUTCIRCUITBREAKER(CB1)OU

Operation11 Liebert® NXL™Figure 10 Main Display Screen, typicalFigure 11 Mimic displayBypass Input—Displays the bypass input voltage and the bypass in

BATTERY CABINET PRECAUTIONSThe following warning applies to all battery cabinets supplied with UPS systems. Additional warn-ings and cautions applicab

OperationLiebert® NXL™12Figure 12 Monitor/mimic display example: Normal power flowFigure 13 Monitor/mimic display example: Utility failGreen – NormalO

Operation13 Liebert® NXL™Figure 14 Monitor/mimic display example: load on bypass, UPS OnFigure 15 Monitor/mimic display example: load on bypass, UPS m

OperationLiebert® NXL™142.2 Touchscreen Navigation2.2.1 Main Display ScreenSeveral menu items can be accessed from the main display screen (see Figure

Operation15 Liebert® NXL™User SettingsSystem Settings These display settings can be changed from the touchscreen. Press the box to the left of each pa

OperationLiebert® NXL™16Adjustable SetpointsThese warning and alarm settings can be changed from the touchscreen. Press the box to the left of each pa

Operation17 Liebert® NXL™Battery ManagementThese DC source settings can be changed from the touchscreen. Press the box to the left of each parameter t

OperationLiebert® NXL™18Figure 20 Battery Management ParametersCell Count Adjustment• Cell Count Adjustment— -12 cells to 6 cells (default: 0)Float Vo

Operation19 Liebert® NXL™2.3 Event ManagementThis menu item permits changing how the Liebert NXL handles Alarms, Faults and Status information. Each e

OperationLiebert® NXL™202.5 Startup MenuThis menu is used to start the UPS and individual devices.Manual—This will begin the UPS startup. See 2.15 - M

Operation21 Liebert® NXL™2.8 Battery Management MenuThis menu permits configuring DC source settings.Time Remaining Graph—Displays the time remaining

iTABLE OF CONTENTSBATTERY CABINET PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2IMPORT

OperationLiebert® NXL™22Manual Battery Test—Start/StopManual Battery Equalize—Start/Stop; must be enabled by Emerson Network Power® Liebert® Services

Operation23 Liebert® NXL™Figure 26 Battery cycle monitor summary2.9 System View—1+N Systems OnlySystem View will display the status of each of the sys

OperationLiebert® NXL™24This button will show the following status of each module in the system:•Comms• Normal—UPS intermodule communication is workin

Operation25 Liebert® NXL™2.13 SilenceThis button will silence the audible alarm.2.14 Modes of OperationThis section illustrates the flow of power thro

OperationLiebert® NXL™262.14.2 OK to TransferThe OK to Transfer status message will be displayed when the bypass line and UPS output power are both av

Operation27 Liebert® NXL™2.14.3 Input Power Failure—Load on DC SourceIf the utility AC power source fails or is outside the acceptable range, the DC s

OperationLiebert® NXL™282.14.5 Emergency Module Off (Optional)The Emergency Module Off (EMO) mode will transfer the critical load to the bypass line a

Operation29 Liebert® NXL™2.14.7 ECO ModeWhen ECO Mode is active, the critical load is supported by the bypass source. The rectifier is On and providin

OperationLiebert® NXL™302.15.1 Startup—Single Module SystemThis section lists typical step-by-step instructions. The touchscreen will list all steps r

Operation31 Liebert® NXL™c. Press OK to continue. This will energize the load on the UPS internal bypass. The message “Close CB1” will appear.d. Close

ii2.15 Manual Operations—All Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292.15.1 Startup—Sin

OperationLiebert® NXL™322.15.2 Startup—N+1 SystemThe following instructions will start an individual UPS module. Repeat these steps for all the UPS un

Operation33 Liebert® NXL™9. Close all Battery/DC breakers associated with this module. The UPS will stay in this mode until all breakers are closed.Sk

OperationLiebert® NXL™34Startup—1+N System with External Maintenance Bypass1. Before applying power to the UPS modules, determine the position of the

Operation35 Liebert® NXL™3. If the system has optional Bypass breakers (MBB/MIB), the message “Close MBB” will appear in the multipurpose window.a. Cl

OperationLiebert® NXL™36Startup—1+N System Without External Maintenance Bypass1. Before applying power to the UPS modules, determine the position of t

Operation37 Liebert® NXL™16. Perform Steps 10 through 14 on the rest of the UPS units in the system ready to be placed on line. This message will appe

OperationLiebert® NXL™382.15.5 Maintenance Bypass Load Transfers—Single Module SystemFollow these instructions to manually transfer the load between t

Operation39 Liebert® NXL™Maintenance Bypass Load Transfers—Single Module System: If Load is on UPS Bypass1. Transfer the UPS system to bypass (see 2.1

OperationLiebert® NXL™402.15.6 Load Transfer—N+1 System: Remove UPS from N+1 System (Collective)1. Press the “Transfer” menu button on the touchscreen

Operation41 Liebert® NXL™2.15.8 Load Transfer—1+N System: Remove a UPS from System (Collective)1. Under the “Transfer” menu button on the touchscreen,

iii3.6 Intelligent Paralleling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 643.6.1

OperationLiebert® NXL™422.15.9 Load Transfer—1+N System: Add a UPS to the System (Collective)This section lists typical step-by-step instructions. The

Operation43 Liebert® NXL™Figure 42 1+N UPS Transfer to Inverter menu commands

OperationLiebert® NXL™442.15.10 Load Transfer—1+N System: Transfer System to Bypass1. Under the “Transfer” menu button on the touchscreen, press the “

Operation45 Liebert® NXL™2.15.12 Load Transfer—1+N System: Transfer to Maintenance BypassFollow these instructions to manually transfer the load betwe

OperationLiebert® NXL™462.15.13 Shutdown—Single Module UPS SystemPerform a Module Shutdown to remove power from a UPS module.Read all warnings in 4.0

Operation47 Liebert® NXL™2.15.14 Shutdown—N+1 UPS SystemPerform a Module Shutdown Procedure when you want to disconnect power from a UPS module. For S

OperationLiebert® NXL™482.15.15 Shutdown—1+N UPS: UPS ShutdownThis section lists typical step-by-step instructions. The touchscreen will list all step

Operation49 Liebert® NXL™Figure 45 1+N UPS shutdown menu commands

OperationLiebert® NXL™502.15.17 1+N System ShutdownThis section lists typical step-by-step instructions. The touchscreen will list all steps required

Operation51 Liebert® NXL™i. To isolate the system, open all MOB breakers and utility feeds to the bypass and rectifier inputs.Figure 46 1+N System Shu

ivFIGURESFigure 1 Typical single module UPS system one-line diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Figure 2

OperationLiebert® NXL™522.16 Automatic OperationsThe Liebert NXL UPS system is designed to function while unattended by an operator. The system contro

Operation53 Liebert® NXL™2.16.2 Automatic Transfers to Bypass (Overload Condition)The UPS system will initiate an automatic load transfer to the bypas

OperationLiebert® NXL™542.16.4 Automatic Retransfers to UPSIn an automatic retransfer, the two circuit breakers (bypass and inverter output) are both

Options55 Liebert® NXL™3.0 OPTIONS3.1 Input Contact Isolator BoardThe Input Contact Isolator Board (ICI) provides a Liebert NXL module interface for u

OptionsLiebert® NXL™56• Assignment—Custom, Pre-assigned (default: “Input Contact” XY)• Delay, sec—0 to 99.9 (default: 0)• Message—Custom: 0-19 charact

Options57 Liebert® NXL™3.2 Programmable Relay BoardThe Programmable Relay Board (PRB) provides a means to trigger an external device when an event occ

OptionsLiebert® NXL™583.2.1 Configuring the Programmable Relay Board Settings1. Press Internal Option Settings from the Config menu.2. Press which Pro

Options59 Liebert® NXL™3.3 Remote Alarm Status Panel RASThe Remote Alarm Status Panel (RAS) uses LED status indicators that allow the operator to moni

OptionsLiebert® NXL™603.4.2 LBS Configurations• Load Bus Sync – Enable or Disabled (default: Disable)• LBS Master Select - Master or Slave (default: S

Options61 Liebert® NXL™3.4.6 Slave SystemAny unit designated as the Slave upon power-up / reset will monitor and lock to the Master LBS Sync Pulse.Whe

vFigure 49 Optional Input Contact Isolator Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56Figur

OptionsLiebert® NXL™623.5.2 OperationECO Mode can be started either manually or automatically.Manually—If “Continuos Operation” is enabled under ECO M

Options63 Liebert® NXL™3.5.3 Bypass Qualification limitsAll of the following conditions must be true to qualify ECO Mode operations based on the bypas

OptionsLiebert® NXL™643.6 Intelligent ParallelingIntelligent Paralleling is intended to increase system efficiency and reduce operating hours on the m

Options65 Liebert® NXL™3.6.2 Intelligent Paralleling Target AreaThe Intelligent Paralleling Target Area is the Number of Redundant Modules that fall b

OptionsLiebert® NXL™663.6.6 Module Standby RotationModule Standby Rotation will limit the time a module is in standby operation when the Number of Red

Options67 Liebert® NXL™Figure 56 Module standby rotationLoadUPS1 UPS2 UPS3 UPS4 UPS5UPS1 UPS2LoadUPS3 UPS4 UPS5LoadUPS1 UPS2 UPS3 UPS4 UPS5LoadUPS1 UP

MaintenanceLiebert® NXL™684.0 MAINTENANCE4.1 Safety PrecautionsObserve the safety precautions in Battery Cabinet Precautions inside the front cover.Ob

Maintenance69 Liebert® NXL™4.2 Liebert ServicesStartup, UPS maintenance, DC source maintenance and training programs are available for the Liebert NXL

MaintenanceLiebert® NXL™704.3 Routine MaintenanceYou should become thoroughly familiar with the equipment, but at no time should you go beyond the spe

Maintenance71 Liebert® NXL™4.3.3 Limited Life ComponentsThe Liebert NXL UPS has a design life well in excess of 10 years. Well-maintained units can co

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MaintenanceLiebert® NXL™724.4.1 Battery Safety PrecautionsServicing of batteries should be performed or supervised by personnel knowledgeable of batte

Maintenance73 Liebert® NXL™Matching Battery Cabinets—OptionalAlthough the individual battery cells are sealed (valve-regulated) and require only minim

MaintenanceLiebert® NXL™74Other DC SourcesIf the UPS system uses a DC source other than a factory-supplied Matching Battery Cabinet, perform maintenan

Specifications75 Liebert® NXL™5.0 SPECIFICATIONS5.1 DC Sources5.1.1 Battery OperationThe separate battery manufacturer’s manual, available on the manu

SpecificationsLiebert® NXL™76Table 9 Electrical specificationsInput ParametersInput Voltage to Rectifier, VAC,3-phase, 3-wire480V/575V/600VInput Volta

Specifications77 Liebert® NXL™Disclosures with Regard to Embedded Software Licensed from Nokia, Inc., (“Sublicensed Software”)1. Limits on Use, Distri

SpecificationsLiebert® NXL™78

UPS Alarm and Status Messages79 Liebert® NXL™APPENDIX A-UPS ALARM AND STATUS MESSAGESTable 10 shows alarm and status messages as they appear in the Li

UPS Alarm and Status MessagesLiebert® NXL™80Batt DischargingThe UPS is on Battery.The most common reason for going to battery is a loss of Rectifier i

UPS Alarm and Status Messages81 Liebert® NXL™Batt Ovtemp LimitOne or more of the Battery Temperature Sensors is reporting a temperature above the limi

Important Safety Instructions1Liebert® NXL™IMPORTANT SAFETY INSTRUCTIONSSAVE THESE INSTRUCTIONSThis manual contains important instructions that should

UPS Alarm and Status MessagesLiebert® NXL™82Batt Temp ImbalanceWith more than one Battery Temperature Sensor installed, the controls are detecting too

UPS Alarm and Status Messages83 Liebert® NXL™BPSS Start InhibitWhen starting the module BPSS's in a 1+N system without a MBB, there are not enoug

UPS Alarm and Status MessagesLiebert® NXL™84BypOverloadPh CThe critical load is greater than 110% while the UPS is on bypass. The controls may shut th

UPS Alarm and Status Messages85 Liebert® NXL™DC LinkGnd Fault-The negative DC Bus has a ground fault.The UPS controls monitor the DC Bus negative half

UPS Alarm and Status MessagesLiebert® NXL™86EMOShutdownAn Emergency Module Off (EMO) command has been detected.The EMO signal means the front panel EM

UPS Alarm and Status Messages87 Liebert® NXL™ExcessAutoRexfersThe UPS has tried to reconnect the inverter to the critical bus too many times. For a si

UPS Alarm and Status MessagesLiebert® NXL™88InletOvtempThe air flowing into the UPS is too warm.This alarm is self-clearing. When the condition is no

UPS Alarm and Status Messages89 Liebert® NXL™InputCurrentLimitAn active Input Current Limit alarm means the detected input current (RMS) exceeds the l

UPS Alarm and Status MessagesLiebert® NXL™90Inv OverloadPh BAn overload condition is active on B phase.B phase load condition exceeds 105%.A countdown

UPS Alarm and Status Messages91 Liebert® NXL™LBS Active - MasterThis UPS system has been enabled as the functional Master Load Bus Synchronization (LB