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AC PowerFor Business-Critical Continuity™Liebert NX™ UPSUser Manual–40-120kVA, 480V, 60Hz

2Battery Cabinet PrecautionsThe following warning applies to all battery cabinets supplied with UPS systems. Additional warn-ings and cautions applica

Specifications and Technical Data9211.4 Battery Run TimesTable 35 Estimated battery run time, minutesUPS Rating/ModelNumber of Cabinets123 440kVA UPSU

UPS Status Messages93APPENDIX A-UPS STATUS MESSAGESTable 36 shows all event messages as they appear in the current status area of the LCD and in the h

UPS Status Messages94Bypass Unable to TraceThis alarm is triggered by an inverter software routine when the amplitude or frequency of bypass voltage i

UPS Status Messages95Inverter STS FailAt least one of the static switches of inverter side is open or short circuit. This fault is locked until power

UPS Status Messages96DC Bus OvervoltageRectifier, inverter and battery converter were shut down because DC bus voltage is too high.Check whether there

UPS Status Messages97Battery Float Charging Battery is float chargingBattery Boost Charging Battery is boost chargingBattery Discharging Battery is di

UPS Status Messages98

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3GLOSSARY OF SYMBOLSRisk of electrical shockIndicates caution followed by important instructionsAC inputAC outputRequests the user to consult the manu

Installation41.0 INSTALLATIONLiebert’s NX Uninterruptible Power Supply system provides continuous, high-quality AC power to your business-critical equ

Installation51.2 Internal Inspections1. Remove any packaging material, then visually examine the UPS and battery equipment for transit damage, both in

Installation6Battery LocationBatteries must be installed in Liebert NX 480V battery cabinets or battery room. Temperature is a major factor in determi

Installation71.6.1 ClearancesThere are no ventilation grilles on the sides or rear of the UPS. The unit may be placed with the rear against a wall and

Installation8Figure 1 Cabinet arrangement—Liebert NX units and battery cabinetsFront of UnitsBatteryCabinetBatteryCabinetBatteryCabinetLiebertNXUPSFro

Installation9Figure 2 Cabinet arrangement—Liebert NX units, battery cabinets and Liebert FPCFront of UnitsMulti-ModuleParallelCabinet Liebert Foundati

Electrical Connections102.0 ELECTRICAL CONNECTIONSThe UPS requires both power and control cabling once it has been mechanically installed. All control

Electrical Connections112.1.2 UPS Input ConfigurationFigure 3 illustrates the Liebert NX in a split bypass (dual-input) configuration. In this configu

Electrical Connections122.1.4 Cable ConnectionsThe rectifier input, bypass and output are easily accessible from the front of the unit for installatio

Electrical Connections132.1.5 Safety GroundThe safety ground busbar is located below the Maintenance Bypass circuit breaker as shown in Figure 4. The

Electrical Connections142.1.7 Cabling ProcedureOnce the equipment has been positioned and secured for operation, and the battery and ground col-lars h

Electrical Connections15Frequency Converter ModeIf a frequency converter configuration is used, connect the AC input supply cables to the rectifier in

Electrical Connections16Figure 6 Auxiliary terminal block detail (Monitoring Board)2.3 Dry ContactsThe UPS provides input dry contacts and output dry

Electrical Connections172.3.1 Input Dry ContactsThere are several input dry contacts at the X3 slot.Figure 7 Input dry contacts2.3.2 Maintenance Bypas

Electrical Connections182.3.3 BCB Control InterfaceJ10 is the BCB box interface.Figure 8 Jumper connection for BCB interface without a battery interfa

Electrical Connections192.3.4 Output Dry ContactsThere are three output dry contact relays at the X1 slot (see Figure 9 and Table 4).Figure 9 Output d

Electrical Connections202.3.5 EPO Input—OptionalThe UPS has an Emergency Power Off (EPO) function operated by a button on the control panel or by a re

Battery Installation213.0 BATTERY INSTALLATION3.1 IntroductionIf using multiple sets of batteries connected in parallel to provide the required batter

iTABLE OF CONTENTSIMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1GLOSSA

Battery Installation223.3 External Battery Cabinet Installation3.3.1 Battery CabinetsFigure 11 Battery cabinetThe same model battery cabinet may be in

Battery Installation233.3.2 Connecting the BatteriesIf the Liebert NX battery cabinets are installed on a raised floor, the battery power cables and c

Battery Installation24Figure 13 Battery tray and supports3.3.4 Connecting the Battery Cabinet to the UPSAfter the battery cabinet equipment has been p

Battery Installation253.6 Alber Monitoring System—OptionalThe Liebert matching battery cabinet allows installing an optional Alber Battery monitoring

Options264.0 OPTIONS4.1 Load Bus SynchronizationThe Load Bus Synchronizer (LBS) keeps the output of two independent UPS systems or parallel UPS system

Options27Figure 15 Load Bus Synchronization cable connection with multi-module systemsThe LBS function is activated with configuration software; when

Options28Figure 16 Parallel system block diagram4.2.3 Operating PrinciplesRedundancy ParallelingThe parallel redundant system can noticeably improve s

Options294.3.1 Conditions for Parallel System• Each UPS module must have the same bypass source.• The outputs of all UPS modules are connected altoget

Options30Figure 17 Connecting system parallel control cablesAuxiliary Dry Contact CablesThe external output breaker of each UPS must have Normally Ope

Options31Figure 19 Dry contacts, multiple UPS modules with distribution panelInput DistributionUPS 1M3 BoardX3Ext. Maint. Ext. OutUPS 2M3 BoardX3Ext.

ii3.4 Non-Standard Batteries. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243.5 BCB Shu

Options324.3.6 Emergency Power Off (EPO)The external emergency stop facility is identical to that described for the single unit installation—that an i

UPS Specifications335.0 UPS SPECIFICATIONSThese specifications describe requirements for the Liebert NX UPS.5.1 Conformity and StandardsThe UPS has be

UPS Specifications345.4 UPS Electrical Characteristics Table 8 UPS terminalInput (For Single-Input Unit)UnitRatingNominalInputCurrentMaximumInputCurre

UPS Specifications355.4.1 Input RectifierBatteryUnitRatingNominalInputCurrentMaximumInputCurrentOCPDeviceRatingBoltSizeMaximum Recommended Lug(Thomas

UPS Specifications365.4.2 DC Intermediate CircuitSee Table 8 for current ratings.5.4.3 Inverter OutputSee Table 8 for current ratings.5.4.4 Bypass Inp

Installation Drawings376.0 INSTALLATION DRAWINGSThe diagrams in this section illustrate the key mechanical and electrical characteristics of the Liebe

Installation Drawings38Figure 22 Dimensions continued—top and bottom views Figure 23 Main components—typical unit113.5(4.5")150(5.9")150(5.9

Installation Drawings39Figure 24 Cable connections965(38")600(23.6")2000(78.7")LEFT SIDE VIEW(with side panel removed)FRONT VIEW(with d

Installation Drawings40Figure 25 Outline drawing, 33" battery power pack system, single cabinet169.5 (6.7)372.7 (14.7)575.9(22.7)779.1(30.7)172.1

Installation Drawings41Figure 26 Terminal details, 33" battery power pack system, single cabinet Liebert NXNOTES:1. All dimensions are in millime

iii8.10 Current Date and Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 658.11 UPS

Installation Drawings42Figure 27 Battery connections H1H2H3X2X3X1H4X4BrownBlueYellow/GreenAC 480VField-SuppliedUPSModuleExt. Batt.1112 14C1C2MXAUX+123

Installation Drawings43Figure 28 Battery cabinet interconnectionNOTES:1. All cables must be repositioned prior to and while setting the cabinets in th

Installation Drawings44Figure 29 Outline drawing, Liebert NX480V, 80-120kVA Type E and E2 parallel cabinetTopRight Side800(31.5)965(38)Front2000(78.7)

Installation Drawings45Figure 30 Outline drawing, Liebert NX480V, 80-120kVA Type E1 parallel cabinet1240(48.8)965(38)2000(78.7)TopRight SideFrontNOTE:

Installation Drawings46Figure 31 Main component location drawing Liebert NX 480V, Type E parallel cabinetFrontRearSystem O/PTie BreakerKirk - KeyFuseD

Installation Drawings47Figure 32 Main component location drawing Liebert NX 480V, Type E1 parallel cabinetFront(With Covers )BypassTieBreakerBypassTie

Installation Drawings48Figure 33 Main component location drawing Liebert NX 480V, Type E2 parallel cabinetSystemO/P TieBreakerKirk-KeyFuseDisconnectSy

Installation Drawings49Figure 34 Lineup detail—Parallel Type E connection to Liebert NXC1-C4DE1-E4B1-B4C1-C4B1-B4AG1-G4H1-H4E1-E4FFRONT(Without Covers

Installation Drawings50Figure 35 Lineup detail—Parallel Type E1 connection to Liebert NXFRONT(Without CoversREAR(Without CoversFRONT(With Door Open)E1

Installation Drawings51Figure 36 Lineup detail—Parallel Type E2 connection to Liebert NXC1-C4E1-E4B1-B4C1-C4G1-G4H1-H4DE1-E4FFRONT(Without Covers)FRON

iv11.0 SPECIFICATIONS AND TECHNICAL DATA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8811.1 Lug Size and Torque Requir

Installation Drawings52Figure 37 Line-up detail, bolt together description, 40-120 kVA Liebert NXRemovewhen cabinetsare to be boltedtogetherDETAIL AAU

Operation537.0 OPERATION7.1 General DescriptionLiebert’s NX provides continuous, high-quality AC power to your business-critical equipment, such as te

Operation547.1.1 Bypass SuppliesThe Liebert NX contains an electronically controlled switching circuit that enables the critical load to be connected

Operation55Maintenance ModeFor maintenance or repair, the Liebert NX may be operated in maintenance mode. To place the Lie-bert NX in maintenance mode

Operator Control and Display Panel568.0 OPERATOR CONTROL AND DISPLAY PANEL8.1 Operator Control PanelThe control panel and LCD on the front of the Lieb

Operator Control and Display Panel57Figure 40 Detailed view of control panel 13245 678 9 10 11121314 15 16 17 18 19Mimic indicators Control buttons Na

Operator Control and Display Panel588.2 Mimic Display IndicatorsThe Mimic display on the front panel consists of six indicators arranged in a single-l

Operator Control and Display Panel598.3 Control ButtonsThe Control Buttons on the front panel may be used to shut down the UPS completely, turn the in

Operator Control and Display Panel608.4 Audible BuzzerThe buzzer produces three types of sounds:• Single beep - when any control button is pressed• Si

Operator Control and Display Panel618.6 Navigation KeysThe navigation keys on the front panel—F1 through F4 and Help—are used to access the LCD to vie

vFigure 41 Mimic display indicators location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58F

Operator Control and Display Panel628.8 LCD Menus and Data ItemsThe LCD menus provide access to the following categories of information and settings f

Operator Control and Display Panel63Table 19 Descriptions of UPS menus and data window itemsMenu Type Item Type ExplanationMains (input)L-N current (A

Operator Control and Display Panel648.9 Language SelectionThe LCD menus and data display are available in 12 languages (Chinese, Dutch, English, Frenc

Operator Control and Display Panel658.10 Current Date and TimeTo change the system date and time:• From the main menu, press the F1 (shift) key to mov

Operator Control and Display Panel668.11 UPS Status MessagesThe Liebert NX displays status changes as they occur in the current status window of the L

Operator Control and Display Panel678.12 Types of LCD ScreensThis section provides a quick guide to the main types of LCD screens.8.12.1 Opening Displ

Operator Control and Display Panel688.12.3 UPS Help ScreenPress the HELP key below the LCD to display the Help window shown in Figure 51. (Press the H

Operator Control and Display Panel698.13 Pop-Up WindowsPop-up prompt windows appear when the user must confirm a choice or perform an operation. This

Operating Instructions709.0 OPERATING INSTRUCTIONS9.1 Liebert NX Operating ModesThe Liebert NX can operate in any of four modes, as shown in Table 20.

Operating Instructions719.1.1 Circuit BreakersThe UPS can be isolated by means of circuit breakers, mounted inside the cabinet and accessible after op

viTable 29 Lead/Lag ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating Instructions729.2 UPS StartupThe Liebert NX must be fully installed and commissioned before startup, and external power isolators must be cl

Operating Instructions736. Press the INVERTER ON control button for 2 seconds.The inverter will start and the inverter indicator will flash green. Aft

Operating Instructions749.3 Maintenance Bypass Procedure and Powering Down the UPSFollow the procedure below to transfer the load from the inverter ou

Operating Instructions759.4 Auto RestartWhen the main and bypass sources fail, the UPS draws power from the battery system to supply the load until th

Operating Instructions769.7 Battery Protection9.7.1 Battery Undervoltage Pre-WarningBefore the end of discharge, the Liebert NX displays a Low Battery

Operating Instructions77Figure 54 Typical parallel system block diagram with common input supply, with separate batteries and optional output / bypass

Operating Instructions789.8.2 Inserting One Module into a Multi-Module SystemThis procedure outlines how to integrate a UPS module that has been previ

Operating Instructions799.8.3 Shutdown Procedure—Complete UPS and Load ShutdownThis procedure must be followed to completely power down the UPS and th

Operating Instructions809.10 Parallel System Start Up1. Start each UPS normally as described in 9.2 - UPS Startup2. Turn on the inverter of each UPS m

Options8110.0 OPTIONSSeveral items of optional equipment are available for connection to the Liebert NX UPS.10.1 Communication and Other User Terminal

1IMPORTANT SAFETY INSTRUCTIONSSAVE THESE INSTRUCTIONSThis manual contains important instructions that should be followed during installation of your L

Options8210.1.4 Communication and MonitoringLiebert IntelliSlot Web Card - SNMP/HTTP Network Interface CardThis network interface card provides all re

Options8310.1.5 Configuring Baud RatesThe default baud rate for Liebert IntelliSlots is 9600. To communicate with the OCWEB-LB, Modbus/Jbus, or the Mu

Options84Figure 56 Liebert IntelliSlot Web card display

Options85Relay CardThe relay card provides voltage-free contact closures for remote monitoring of alarm conditions.Delivering On Battery, On Bypass, L

Options86MultiPort 4 CardThe MultiPort 4 card provides four sets of voltage-free contact closures for remote monitoring of alarm conditions UPS operat

Options8710.2 LBS Mode—Load Bus SynchronizationThe function of LBS is to keep the output of two independent UPS systems (single unit or multiple unit)

Specifications and Technical Data8811.0 SPECIFICATIONS AND TECHNICAL DATA11.1 Lug Size and Torque RequirementsUse commercially available solderless lu

Specifications and Technical Data89Liebert NX, then add the appropriate length from the table and adequate slack for repair and mainte-nance.Table 26

Specifications and Technical Data9011.3 Cable size and tightening torquesTable 28 External cabinet dimensions, including side panelsType E1 Parallel C

Specifications and Technical Data91Table 32 Cable size tightening torque at Liebert NX 80kVA UPS terminalsBus TypeCable Size(Copper Wire Only)Torque t