Liebert Series 600T manual Load on Maintenance Bypass Two Breakers

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3.2.10Maintenance Bypass

Maintenance Bypass switchgear (cabinet, panelboard, switchboard or custom switchgear) allows you to totally isolate the UPS system from all power sources, while you maintain power to the critical load.

Your installation may have a two-breaker, three-breaker, or four-breaker Maintenance Bypass, or none at all. The main differences are the locations of the Rectifier Input Breaker and the Bypass Input Breaker (BIB).

Another option that may be present at your site is an alternate power source (generator) and an automatic transfer switch (ATS).

Note that to totally isolate the UPS system from all power sources, the Main Input switchgear and battery circuit breakers must also be opened.

CAUTION

Instructions for operating the Maintenance Bypass circuit breakers are on the Maintenance Bypass cabinet. Make sure you understand the proper sequence before operating any circuit breaker. Operating a Maintenance Bypass circuit breaker out of sequence could cut off power to the critical load.

Figure 57 Load on Maintenance Bypass (Two Breakers)

RIB

RIB

RIB

BIB

BFB

UPS #3

UPS #2

UPS

#1

CB1

CB1

CB1

SBS

R

R

R

SBB

MBB

I

I

I

System

CB2

CB2

CB2

SKRU

Controls

Output MIB

										SCCT
										To Critical Load
										To Critical Load
			MBD			MBD				MBD
										SCCT
	Battery			Battery			Battery			SCCT
	Battery			Battery			Battery			(can accommodate up to 6 UPS modules)
										(can accommodate up to 6 UPS modules)

88	Operation	DISCONTINUED
		PRODUCT

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Contents Series 600T UPS DIS Product Table of Contents Manual Procedures Figures Tables Important Safety Instructions Overview of this Manual System Description Multi-Module UPS, 65-80 kVA left and 100-500 kVA rightProduct Multi-Module 500-750 kVA UPS Types of System Control Cabinets SCCs System Control Cabinets SCCsDesigned for Success ReliabilityOther Factors to Consider Safety Precautions Modes of Operation Operator Controls DIS Product Options General Component Descriptions System Control CabinetBattery Plant UPS ModuleFirmware Detailed Component DescriptionsControls Hardware Rectifier/ChargerInput Circuit Breaker Input Power FactorBattery Charging Circuit Isolation TransformerBattery Equalize Charge Circuit Battery DisconnectBattery Charge Current Limiting Operation After End-of-DischargeInverter Non-Linear Load CharacteristicsUnbalanced Load Characteristics Output Regulation and Overload PerformanceFuse Protection Static Switch IsolationStatic Bypass Shorted SCR MonitoringPulsed Parallel Operation Load TransfersManual Transfers Transfer and Retransfer ConditionsAutomatic Transfers to Bypass Transfer InhibitedManual Retransfers Redundant ModeRetransfer Inhibited Features Display Screen and Operator ControlsDescription Function System Control Cabinet Operator Controls Sccb Pictured Shutdown Procedures Description Location FunctionSwitches Behind SCC Control Panel Door Menu Tree Master Menu Screen WALK-IN Display modules onlyBattery Time modules only Load Transfer Procedures SCC onlyCustomer Alarm Definitions SCC only Input Metering Displays Monitor/Mimic Display ScreenOutput Metering Displays Item 5 Module Status Messages Status/Alarm Message AreasItem 7 Alarm Messages Item 6 System Status MessagesModule Monitor/Mimic Display Screen Alarm Messages Item 5 Alarm MessagesMOD 1 on Line MOD 2 on Line MOD 3 on Line UPS Ratings UPS Input PWR UPS Ratings UPS Input PWR Bypass Input Load Bypass Input C-A Walk-In Display Screen Walk-In Display Screen During Start-UpStatus Reports Screens Status Reports ScreenPresent Status Select ExitEvent History Event History MODULE-0History Status History Status Report ScreensSCC ModuleBattery Cycle Monitor Module Only System StatusBattery Cycle Monitoring Summary Screen System Configuration Screens System ConfigurationDate Date ScreenTime Time ScreenAuto Dial DialModem Baud Rate Modem Baud RateMaximum Auto-Retransfer Attempts Retransfer AttemptsRemote Monitor Alarm Limit Settings Screen Alarm SettingsProduct Load Transfer Procedures Screen Refer to 3.3.2 Load Transfer Procedures for more detailsStart-Up Procedures Screen Refer to 3.3.1 Start-Up Procedure for more detailsModule Start- Up Procedures Screen Shutdown Procedures Screen Shutdown ProceduresModule Shutdown Procedures Screen Battery Time Screen Module Only VDCBattery Time Screen Example 45 Minute Discharge Range of Values for Calculated Battery Times Aining Rem Tim Calculated La p s e d T im e M in u te sMeter Calibration Screen UP Cursor UP Down Cursor Down Select ChooseBattery Equalize Screen Battery Equalize RechargingAlarm and Status Messages Module Status Messages 3 Modules ConnectedSystem Status Messages Load Block MessagesAbbreviations Used in Alarm Messages OF/UFPower DC Ground FaultBattery CB Open BatteryBypass Phase Manual ResetStatic Switch Control PowerSystem Configuration Screens or the watchdog timer has AlarmIndications and Other Alarms That Activate Summary Alarms Reverse PowerTimeout TemperatureOver-Temperature System Configuration Screens Load On UPSAlarm Message Special FunctionsAuto-Dial Communication InterfacesWorldwide Reporting Requesting InformationSite Reporting SiteScan or Snmp Local Reporting to a TerminalLocal Reporting to a Monitor Remote Monitor PanelSeparate / Simultaneous Outputs Load On Bypass ScctOK To Transfer Load on Bypass UPS AvailableLoad on UPS Bypass Available Momentary Overloads Refer to 3.4 Automatic OperationsInput Power Failure Load On Battery Input Power Fail Load on BatteryOne Module Off-Line One Module Off-Line Load on UPSOff Battery Load on UPS Battery Not AvailableRefer to 3.3.3 Shutdown Procedures Emergency Modules OffEmergency Power Off Emergency Power OffRefer to 3.2.10 Maintenance Bypass System ShutdownLoad on Maintenance Bypass Two Breakers Load on Maintenance Bypass Three Breakers Manual Procedures Refer to 3.4 Automatic Operations for more detailsStart-Up Procedure SCC Start-Up B2. Set the Static Switch Disconnects OFF open SCC Start-Up Procedures Screen UPS Module Start-Up Module Start-Up Procedures Screen Product Load Transfer Procedures If the load is on Maintenance Bypass Maintenance Bypass Load TransfersMaintenance Bypass System BypassShutdown Procedures System Shutdown Procedure UPS bypass line is still energized100 Module Shutdown Procedure Remote Emergency Power Off Repo Local Emergency Modules Off LemoAutomatic Operations Overloads Without TransferAutomatic Transfers to Bypass Automatic Retransfers to UPSAutomatic Module Off-Line Automatic Emergency Modules OffMaintenance DIS Product Professional Start-Up Liebert Global ServicesMaintenance Agreements The Signature Program TrainingRecord Log Routine MaintenanceAir Filters Battery Maintenance Battery Safety PrecautionsDIS Product 112 DIS Product Rack-Mounted Batteries Matching Battery Cabinets OptionalPower Batteries Torque RequirementsTorque Specifications Unless Otherwise Labeled Detection of TroubleCorrective Actions Reporting a ProblemRecommended Test Equipment Rating Environmental Conditions Adjustments Battery OperationElectrical Specifications Voltage Transient Recovery Time Voltage Adjustment RangePhase Balancing Voltage Harmonic ContentSeries 600T UPS

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