Emerson 480V Commissioning a Parallel System, Shutdown Procedure-Complete UPS and Load Shutdown

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Operating Instructions

9.8.3Shutdown Procedure—Complete UPS and Load Shutdown

This procedure must be followed to completely power down the UPS and the load. All power switches, isolators and circuit breakers will be opened and power will be removed from the load.

In multi-module systems, perform each step of the procedure in every UPS module before proceeding to the next step.

! CAUTION

This procedure will shut off power to the load.

NOTE

Before beginning this procedure, shut down the connected load to prevent the possibility of damage.

1.Press the EPO (Emergency Power Off) button at the UPS front panel only. This will disable Rectifier, Inverter, Static Switch and Battery operation. The load will be de-energized.

! CAUTION

Except in an emergency situation, do not press any remote EPO button

2.Open the UPS door to gain access to the main circuit breakers.

3.Open the Rectifier input circuit breaker CB1.

4.Open external battery circuit breaker. This breaker is inside the battery cabinet or is otherwise adjacent to the battery racks.

5.Open Output circuit breaker CB5.

6.Open bypass input circuit breaker CB2.

7.Ensure maintenance bypass circuit breaker CB3 is open.

8.All mimic panel LED indications and messages will extinguish as the mains-driven, internal power supplies decay.

9.To completely isolate the UPS from the AC supplies, the main external power input isolator (both isolators, where dual supplies are provided for rectifier and bypass) and external output isolator must be opened and tagged with warning labels accordingly.

9.9Commissioning a Parallel System

! CAUTION

The operations described in this section must be performed by authorized electricians or qualified technical personnel. If you have any difficulty, call 1-800-LIEBERT for assistance.

Check the input and output wiring of each UPS module. Ensure that the phase rotation sequence of the main inputs and the bypass inputs and outputs of each UPS module are the same. Ensure that the parallel cables are connected firmly.

It is assumed that the installation is complete, the system has been commissioned by authorized per- sonnel and the external power isolators are closed. Disconnect the load before startup.

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Contents Liebert NX UPS Page Table of Contents UPS Specifications OptionsOperator Control and Display Panel Pop-Up Windows Operating InstructionsAppendix a UPS Status Messages Specifications and Technical DataTables Page Important Safety Instructions Battery Cabinet Precautions Glossary of Symbols External Inspections InstallationInternal Inspections Preliminary ChecksUPS Location Special Considerations for Parallel Systems Battery LocationConsiderations in Moving the Liebert NX Mechanical ConsiderationsSystem Composition Floor InstallationClearances Cable EntryCabinet arrangement-Liebert NX units and battery cabinets UPS Power Cabling Cable RatingLug Size and Torque Requirements Cabling Guidelines UPS Input ConfigurationInput and output busbars Cable ConnectionsSafety Ground Protective DevicesUPS Rectifier and Bypass Input Supply Dual Input Connections Cabling ProcedureOutput System Connections-Ensure Correct Phase Rotation Common Input ConnectionsFrequency Converter Mode Monitor Board FeaturesControl Cables Dry Contacts Input dry contacts at Maintenance Bypass Cabinet InterfaceMaintenance bypass cabinet interface Input Dry ContactsBCB control interface BCB Control InterfaceOutput dry contact relays Inverter mode relay centerMain input fault relay center Output Dry ContactsEPO Input-Optional EPO input contact relaysIndicates Pin Introduction SafetyBattery Cabinets External Battery Cabinet InstallationConnecting the Batteries Installation ConsiderationsInsulated Post Tray Handle For Cabling Connecting the Battery Cabinet to the UPS Non-Standard BatteriesBCB Shunt Trip Alber Monitoring System-Optional This power must be UPS protectedLBS Cable LBS Cable and SettingsLoad Bus Synchronization Performance RequirementsConfiguring Parallel System Operation Features of Parallel SystemGeneral Installing Parallel System Operating Principles Redundancy ParallelingOperation Modes Summary Preliminary Checks Cabinet InstallationPower Cables Conditions for Parallel SystemInterconnecting Auxiliary Dry Contact CablesCables Q1Ext Q2Ext QBypTo Load Normally Closed EPO Normally Open EPOConformity and Standards UPS Mechanical CharacteristicsEnvironmental characteristics UPS mechanical characteristicsUPS terminal UPS Electrical CharacteristicsBattery Manufacturer Models Supplied Rectifier input powerLiebert approved replacement batteries Rated Power kVA 100 120DC Intermediate Circuit Inverter OutputBypass Input Left Side GND Left Side View Front View Max. Door Swing U3819205 Batt Ext530628 Pg , Rev External Battery Cabinet Battery BreakerAuxiliary Contacts Top Top Front Right Side System Front RearRear FRONTOutput Run From Conductors AC Output Ph A, B, C System InputPh A, B, C UPS Inputs Ph A, B, C UPS OutputsUtility UPS #1-UPS #4 Module AC Ph A, B, C UPS Inputs Ph A, B, C System OutputsGround UPS U3819301 Isometric ViewGeneral Description Single module block diagram dual input configurationBypass Supplies Normal ModeBattery Mode Bypass ModeParallel Redundancy Mode System Expansion Maintenance ModeDisplay Panel Layout Operator Control PanelDetailed view of control panel Mimic indicators Control buttons Navigation keysMimic display status indicators Mimic Display IndicatorsControl buttons Control ButtonsLCD Overview Audible BuzzerDescription of items in UPS system window Navigation KeysUPS System Information Icons for navigation keysLCD Menus and Data Items Input Descriptions of UPS menus and data window itemsMenu Type Item Type Explanation MainsStart/stop Battery Language SelectionTests Set date and time Current Date and TimeCurrent status and history log records UPS Status MessagesDefault Screen Types of LCD ScreensOpening Display Screen Saver Window UPS Help ScreenPop-Up Windows UPS operating modes Liebert NX Operating ModesCircuit breakers Circuit BreakersStartup Procedure Indicator StateUPS Startup Switch from Bypass Mode to Normal Mode Switch from Normal Mode to Bypass ModeMaintenance Bypass Procedure and Powering Down the UPS Emergency Shutdown With EPO Auto RestartBattery End-of-Discharge EOD Protection Battery ProtectionMulti-Module System Procedures Battery Undervoltage Pre-WarningTie breaker LED Function Status Inserting One Module into a Multi-Module SystemCommissioning a Parallel System Shutdown Procedure-Complete UPS and Load ShutdownParallel System Start Up Liebert IntelliSlot Communication Power OutputCommunication and Other User Terminals Analog Input InterfaceBaud Rates See 10.1.5 ConfiguringLiebert NX communication options CommentsConfiguring Baud Rates Liebert IntelliSlot Web card display Pin Function Operation Relay Card pin configurationRelay card jumper configuration Relay CardMultiPort 4 Card AssignmentPin Description Remote Alarm Monitor LBS Mode-Load Bus SynchronizationReplacing Dust Filters Cable Lengths Floor to Connection Point Inside UPS Torque specificationsBattery torque rating Lug Size and Torque RequirementsParallel system current table Distance to connection points on the Liebert NX UPSExternal cabinet dimensions, including side panels Cable size and tightening torquesLead/Lag ratings 250 10 N*m Estimated battery run time, minutes Battery Run TimesServices at 800-543-2378 for assistance UPS status messagesEvent Message Description / Suggested Action if any Software according to the customer’s agreement High ambient air temperatureBypass voltage is beyond the normal range Bypass voltage exceeds the limitCondition is removed Error can also leads to the alarmAlarm if applicable Inverter STS FailEPO Emergency Power OffUPS status messages UPS Status Messages Page That Ne tIti Ti n
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480V specifications

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