Emerson 60HZ, 480V Switch from Normal Mode to Bypass Mode, Switch from Bypass Mode to Normal Mode

Page 88
Switch from Normal Mode to Bypass Mode

Operating Instructions

9.2.2Verify Switching Between Operation Modes Switch from Normal Mode to Battery Mode

•Open CB1 to enter battery mode. This breaks the utility connection to the Liebert NX.

To return to normal mode, close CB1 after a few seconds. The rectifier will restart automatically after 10 seconds and resume feeding power to the inverter.

Switch from Normal Mode to Bypass Mode

• Press the INVERTER OFF button to switch to bypass mode.

NOTE

In bypass mode, the load is being powered by the utility and is not receiving conditioned power through the inverter.

Switch from Bypass Mode to Normal Mode

•In bypass mode, press the INVERTER ON button. When the inverter is ready, the UPS will switch to normal mode.

9.3Maintenance Bypass Procedure and Powering Down the UPS

Follow the procedure below to transfer the load from the inverter output to the Maintenance Bypass line of the UPS.

! CAUTION

Before performing this operation, read the messages on the LCD to be sure that bypass supply is regular and the inverter is synchronous with it. If those conditions are not present, there is a risk of a short interruption in powering the load.

This procedure assumes that the UPS is operating normally.

1.Press the INVERTER OFF button on the operator control panel for longer than 2 seconds.

The Inverter indicator will turn off and the status indicator will turn amber and an audible alarm will sound. The load will transfer to static bypass and the inverter will shut off.

NOTE

Pressing the Alarm Silence Switch cancels the audible alarm, but leaves the warning message displayed until the relevant condition is rectified.

2.Close maintenance breaker CB3.

The Maintenance Bypass supply is now in parallel with the UPS Static Switch supply.

3.Open output breaker CB5. This ends the bypass procedure. The load is now powered directly from the Maintenance Bypass supply.

4.Press the EPO (Emergency Power Off) button at the UPS front panel of this UPS module only. This will disable further Rectifier, Inverter, Static Switch and Battery operation. This will not affect the manual maintenance bypass power switch. If a Liebert NX battery cabinet is connected, the battery circuit breaker will shunt trip open.

5.Open the rectifier switch CB1 and bypass breaker CB2.

All operator indicators and messages will turn off as the utility-driven internal power supplies decay. The unit will power down, but the load will continue to be supplied by the manual Mainte- nance bypass.

! WARNING

Wait 5 minutes for the internal DC busbar capacitors to discharge before attempting to remove the internal protective barriers.

! WARNING

Even with the UPS in maintenance bypass and “Off,” portions of the unit are still energized. Service is to be performed by qualified personnel only.

! CAUTION

The load equipment is not protected from normal supply aberrations when operating in maintenance bypass mode.

6. To return unit to normal operation, follow the steps in 9.2.1 - Startup Procedure.

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Contents Liebert NX UPS AC PowerUser Manual–40-200kVA, 480V,60Hz For Business-CriticalContinuityPage TABLE OF CONTENTS 4.0 OPTIONS 9.0 OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FIGURES Figure 39 Main component location drawing Liebert NX 480V, CB2, CB3, CB4 configurations . . . . . . . . . TABLES SAVE THESE INSTRUCTIONS IMPORTANT SAFETY INSTRUCTIONSBattery Cabinet Precautions • Remove watches, rings and other metal objects GLOSSARY OF SYMBOLS Risk of electrical shockAC input AC output Requests the user to consult the manual1.0INSTALLATION 1.1External Inspections1.2.1Storing for Delayed Installation 1.2Internal Inspections1.3Preliminary Checks 1.4UPS LocationBattery Location 1.5Considerations in Moving the Liebert NX1.6Mechanical Considerations 1.4.3Special Considerations for Parallel Systems1.6.2Floor Installation 1.6.1Clearances1.6.3Cable Entry System CompositionFront of Units Battery Cabinet LiebertLiebert NX Bypass2.1Power Cabling 2.0ELECTRICAL CONNECTIONS2.1.1Cable Rating Lug Size and Torque Requirements2.1.2UPS Input Configuration 2.1.3Cabling GuidelinesLiebert NX 40-120kVAConnections Liebert NX 160-200kVAConnections2.1.4Cable Connections Figure 4 Input and output busbars2.1.5Safety Ground 2.1.7Cabling Procedure2.1.6Protective Devices UPS Rectifier and Bypass Input SupplyDual Input Connections Common Input ConnectionsFrequency Converter Mode 2.2Control Cables 2.2.1Monitor Board FeaturesFigure 5 Monitor board U2 2.3Dry Contacts 2.3.2Maintenance Bypass Cabinet Interface Table 2 Maintenance bypass cabinet interface2.3.1Input Dry Contacts Figure 7 Input dry contacts2.3.3Battery Circuit Breaker Control Interface 2.3.4Output Dry ContactsTable 3 BCB control interface Output dry contact relaysFigure 9 EPO wiring 2.3.5EPO Input—OptionalEPO - NO EPO - NC3.0BATTERY INSTALLATION 3.2Safety3.1Introduction 3.3.1Battery Cabinets 3.3External Battery Cabinet InstallationFigure 10 Battery cabinets for Liebert NX 3.3.3Installation Considerations 3.3.2Connecting the BatteriesFigure 11 Battery cabinet—details 3.3.4Connecting the Battery Cabinet to the UPS Figure 12 Battery tray and supports3.4Non-StandardBatteries 3.5BCB Shunt TripThis power must be UPS protected 3.6Alber Monitoring System—Optional4.1.2LBS Cable and Settings 4.1Load Bus Synchronization4.0OPTIONS 4.1.1Performance Requirements4.2.2Features of Parallel System 4.2Configuring Parallel System Operation4.2.1General 480V, 3W Input 480V DC Battery Input Figure 15 Parallel system block diagramLiebert NX UPS 40-200kVA 480V, 3W UOB Output•Battery Mode Operation •Maintenance Bypass Mode Operation4.2.3Operating Principles Redundancy Paralleling 4.2.4Operation Modes Summary4.3Installing Parallel System 4.3.2Cabinet Installation4.3.4Power Cables 4.3.1Conditions for Parallel SystemFor startup procedure, 9.2 - UPS Startup Auxiliary Dry Contact Cables4.3.6Emergency Power Off EPO Figure 20 Connecting EPO push buttonX2:3 X2:4Environmental characteristics 5.0UPS SPECIFICATIONSUPS mechanical characteristics 5.4UPS Electrical Characteristics Table 8 UPS terminalTable 9 Rectifier input power 5.4.1Input RectifierUPS terminal continued Table 10 Input voltage window with deratingTable 11 Liebert approved replacement batteries 5.4.2DC Intermediate Circuit5.4.3Inverter Output Table 12 DC intermediate circuit5.4.4 Bypass Input Table 14 Bypass inputLeft Side FrontFront Detail AParallel Board FRONT VIEW LEFT VIEW1239mm 2000mmTOP VIEW Front of UPS BOTTOM VIEW Front of UPSInstallation Drawings DETAIL A 224mm DETAIL A8.83 609.3 24 872.2 34.3 U3819205 RIGHT SIDE FRONTSECTION A-A TOP VIEWDetail A Top ViewDetail B without BCB Cover Plate49 Battery Cabinet Right-SideViews A D NX 160-200KVAUPS Module Front View A CBB D CDInstallation Drawings Top Right Side Front845 33.2 965 38 2000 78.7 Right Side FrontFront RearSystem Input UPS OutputWithout Covers FRONT UPS Output Breakers Ground BusbarSystem Kirk-KeyDoor Open FRONTREAR A B1-B4 FRONT Without Covers LEFT SIDE Without Exterior Panels 965 38 in 2000 78.7 inRIGHT SIDE Without Exterior Panels LEFT SIDE Isometric View7.1General Description 7.0OPERATIONBattery Mode 7.1.1Bypass Supplies7.1.2Operating Modes Normal ModeMaintenance Mode Parallel Redundancy Mode System Expansion8.0OPERATOR CONTROL AND DISPLAY PANEL 8.1.1Display Panel LayoutFigure 45 Overview of control panel Liquid Crystal Display LCD Mimic display LED2Figure 47 Mimic display indicators location Bypass indicatorLoad indicator Inverter indicatorInverter Off button Fault Clear button Figure 48 Location of control buttonsButton cover EPO button Silence On/Off button Inverter On buttonData and settings Figure 49 Buzzer locationFigure 50 Sections of the LCD UPS systemTable 17 Icons for navigation keys 8.8LCD Menus and Data Items Figure 51 Menu treeOperator Control and Display Panel 8.9Language Selection Figure 52 Language selection8.10Current Date and Time Figure 53 Set date and timeCurrent StatusMessages History Log records menu8.12.2Default Screen Figure 56 Default screen8.12Types of LCD Screens 8.12.1Opening DisplayPress any key back to main menu 8.12.3UPS Help Screen8.12.4Screen Saver Window Figure 57 Help screen8.13.4 Battery Capacity Test Confirmation 8.13.5Battery Self-TestAborted, Condition Not Met8.13Pop-UpWindows 8.13.3System Self-Test9.0OPERATING INSTRUCTIONS 9.1Liebert NX Operating ModesTable 20 UPS operating modes 9.2.1Startup Procedure 9.2UPS Startup9.1.1Circuit Breakers Figure 59 Circuit breakers•Close CB5 CB1, CB2, CB3 and CB5 are closed Switch from Normal Mode to Bypass Mode Switch from Bypass Mode to Normal Mode9.4Auto Restart 9.5Emergency Shutdown With EPO9.7Battery Protection 9.8Multi-ModuleSystem Procedures9.7.1Battery Undervoltage Pre-Warning 9.7.2Battery End-of-DischargeEOD Protection3.Close Input breaker CB1 9.9Commissioning a Parallel System 9.10Parallel System Startup10.1.2Power Output 10.1Communication and Other User Terminals10.0OPTIONS 10.1.1Analog Input Interface10.1.4Communication and Monitoring 10.1.5Configuring Baud RatesTable 21 Liebert NX communication options Figure 62 Liebert IntelliSlot Web card display Table 23 Relay card jumper configuration Table 22 Relay Card pin configurationRelay Card MultiPort 4 Card Figure 63 MultiPort 4 card pin assignment10.2.1Remote Alarm Monitor Figure 64 Dust filter replacement10.2LBS Mode—LoadBus Synchronization 10.3Replacing Dust Filters11.0SPECIFICATIONS AND TECHNICAL DATA Table 24 Torque specificationsTable 25 Battery torque rating Specifications and Technical DataTable 27 Parallel system current table 11.3Cable size and tightening torques Specifications and Technical Data Table 37 Enersys battery run times in minutes 11.4Battery Run TimesTable 38 C&D Dynasty battery run times in minutes Table 38 C&D Dynasty battery run times in minutes Table 39 UPS status messages APPENDIX A - UPS STATUS MESSAGESUPS Status Messages Table 39 UPS status messages UPS Status MessagesEvent Message Description / Suggested Action if anyTable 39 UPS status messages UPS Status MessagesTable 39 UPS status messages UPS Status MessagesTable 39 UPS status messages UPS Status MessagesUPS Status Messages Page Ensuring The High Availability Of Mission-CriticalData And ApplicationsTechnical Support/ Service reducedcapitalequipment andoperatingcosts
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60HZ, 480V specifications

The Emerson 40-120KVA UPS is a high-performing uninterruptible power supply designed to ensure the reliability and continuity of critical operations across various industries. This UPS operates at 480VAC and 60Hz, making it suitable for environments where high-power demands are common.

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