Switch from Normal Mode to Bypass Mode | Emerson 40-200KVA specification

Operating Instructions

11.2.2Verify 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.

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Emerson 40-200KVA user manual Switch from Normal Mode to Bypass Mode, Switch from Bypass Mode to Normal Mode

Contents

Liebert NX UPS Page Table of Contents Options UPS Specifications Operating Instructions Installation Drawings OperationOperator Control and Display Panel Appendix a UPS Status Messages Specifications and Technical Data Connecting EPO push button Tables 114 Viii Important Safety Instructions Page Battery Cabinet Precautions Page Glossary of Symbols Introduction Internal Inspections External Inspections UPS Location Preliminary Checks Final Position Battery LocationConsiderations in Moving the Liebert NX Special Considerations for Parallel Systems Cable Entry Floor InstallationMechanical Considerations Clearances Front of Units Optional Cabinets Front of Units Lug Size and Torque Requirements Power CablingCable Rating Cabling Guidelines UPS Input Configuration UPS Rectifier and Bypass Input Supply Safety GroundCable Connections Protective Devices Dual Input Connections Cabling ProcedureCommon Input Connections Frequency Converter Mode Output System Connections-Ensure Correct Phase Rotation Control Cables Monitor Board Features J26 J30 J22 J23 J12 J15J16 J13 J21 J25 Input Dry Contacts Maintenance Bypass Cabinet InterfaceMaintenance bypass cabinet interface Dry Contacts Output dry contact relays Battery Circuit Breaker Control InterfaceOutput Dry Contacts BCB control interface Indicates Pin EPO Input-OptionalEPO input contact relays Safety Battery Cabinets External Battery Cabinet Installation Insulated Post Tray Handle For Cabling Connecting the BatteriesInstallation Considerations Non-Standard Batteries Connecting the Battery Cabinet to the UPS Alber Monitoring System-Optional BCB Shunt Trip LBS Cable LBS Cable and SettingsLoad Bus Synchronization Performance Requirements UPS General Configuring Parallel Sbasystem OperationFeatures of Parallel System RIB 2 UPS Module RIB 3 UPS Module RIB 4 UPS Module 480V, 3W System Output480V, 3W System Input 480V, 3W Output Conditions for Parallel System Installing Parallel SystemOperating Principles Redundancy Paralleling Operation Modes Summary Parallel Control Cables Parallel System Control Cables Cabinet InstallationPower Cables Preliminary Checks Auxiliary Dry Contact Cables Normally Closed EPO Normally Open EPO Conformity and Standards UPS Mechanical CharacteristicsEnvironmental characteristics UPS mechanical characteristics UPS terminal UPS Electrical Characteristics Input Rectifier Rectifier input powerRated Power kVA 100 120 160 DC Intermediate Circuit Liebert-approved replacement batteriesBattery Models Manufacturer Supplied Rated Power kVA 100 120 160 200 Bypass input Inverter OutputBypass Input Inverter output Liebert BDC Normal UPS Mode Locating the Cabinet Maintenance ModeCable Installation Input/Output Wiring Liebert BDC connection to UPS Control wiring for Liebert NX UPS to Liebert BDC Install Interrupting Circuit breaker schedule Main circuit breaker 225A T3N225TW Main panelboard circuit breakerPanelboard branch circuit breaker 208V Square D I-Line panelboard circuit breaker Subfeed circuit breaker Bolting a Liebert Nxups to a Liebert BDC Bolting Cabinets Together Outline drawing, Liebert BDC, 47 cabinet Outline drawing, Liebert NX 40-120kVA Weights, Liebert NX 40-120kVA Unit Rating Bolt Size Lb-in N-m Battery cabinet groundBattery cabinet circuit breaker Torque 80-120 225 Electrical specifications, Liebert NX 160-200kVA Liebert NX 160-200kVA dimensions-front and left side U389641 GND Front View Left View TOP View Liebert NX 160-200kVA main components-typical unit Detail a 224mm 609.3 872.2 34.3 Detail B Front Detail a CBB Installation Drawings Front Top Right Side Top Front Rear Without Covers Front Run From Conductors Door Open Front Without Covers Left Side General Description Single module block diagram dual input configuration Operating Modes Normal ModeBattery Mode Bypass Supplies Eco Mode Maintenance ModeParallel Redundancy Mode System Expansion Display Panel Layout Operator Control Panel Mimic display status indicators Mimic Display Indicators Control buttons Control Buttons LCD Overview Audible Buzzer Description of items in UPS system window Navigation KeysUPS System Information Icons for navigation keys LCD Menus and Data Items Descriptions of UPS menus and data window items Tests LanguageStart/stop Current Date and Time Language Selection Set date and time Current status and history log records UPS Status Messages 10.12.1Opening Display 10.12.2Default ScreenTypes of LCD Screens 10.12.4Screen Saver Window 10.12.3UPS Help Screen Pop-Up Windows UPS operating modes Liebert NX Operating Modes Circuit Breakers Startup ProcedureUPS Startup Indicator State Switch from Bypass Mode to Normal Mode Switch from Normal Mode to Bypass Mode Operating Instructions Operating Instructions Energize Nx 480 with Bypass Distribution Cabinet BDC Emergency Shutdown With EPO Auto Restart 11.10.2Battery End-of-Discharge EOD Protection Battery ProtectionMulti-Module System Procedures 11.10.1Battery Undervoltage Pre-Warning 103 LED Function Status 11.11.2Inserting One Module into a Multi-Module System Parallel System Startup 11.11.3Shutdown Procedure-Complete UPS and Load ShutdownCommissioning a Parallel System Liebert IntelliSlot Communication Power OutputCommunication and Other User Terminals Analog Input Interface Comments Configuring Baud RatesSee 12.1.5 Configuring Liebert NX communication options Liebert IntelliSlot Web card display Relay Card MultiPort 4 Card Remote Alarm MonitorLBS Mode-Load Bus Synchronization Replacing Dust Filters Lug Size and Torque Requirements Torque specificationsBattery torque rating Battery In-lb N-m Parallel system current table Cable Lengths Floor to Connection Point Inside UPSDistance to connection points on the Liebert NX UPS Cable size and tightening torques External cabinet dimensions, including side panels 113 Enersys battery run times in minutes Battery Run Times D Dynasty battery run times in minutes Specifications and Technical Data 116 Event Message Description / Suggested Action if any UPS status messages 118 119 120 121 Care Ne tIs t Twor k