Liebert Series 600T manual Input Circuit Breaker, Isolation Transformer, Input Current Limit

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full load with optional input filter. For modules 500 kVA and larger, the optional 12-pulse rectifier reduces reflected THD to less than 4% with optional filter, or 9% without.

The filtered output of the rectifier/charger provides regulated DC power to drive the inverter and charge the bat- tery.

Input Circuit Breaker

The input circuit breaker (CB1) is sized to allow enough current to recharge the battery and supply a full rated load at the same time. The circuit breaker contains a thermal magnetic trip mechanism and an undervoltage release that interrupts power, preventing damage to the system, if there is an internal AC over-current condition or a short circuit. The circuit breaker also opens during certain alarmed faults. This circuit breaker must be closed manually.

Isolation Transformer

The optional input isolation transformer has a dry type core, and copper windings with class H insulation. The transformer on modules with standard 6-pulse rectifier has wye primary and delta secondary windings. For mod- els with the optional 12-pulse rectifier, the transformer has a delta primary, with delta and wye secondary wind- ings. The isolation transformer provides the initial step of critical bus isolation. This reduces the AC shock hazard at the battery and at other DC components, and prevents a DC fault from disrupting upstream AC cir- cuitry.

The transformer has a nominal tap and one tap 6% below the rated nominal input voltage (normally used for 460 VAC input).

Input Current Limit

AC input current-sensing transformers (CTs) are used to measure current levels. Control circuitry connected to the CTs restricts the AC current to less than 125% of the full input current rating by reducing the battery charging voltage. This current limit is adjustable from 100 to 125% and is factory set at 115%. A second (optional) level of input current limit can be initiated by an external contact closure (field supplied for use with back-up genera- tor), and is adjustable from 85 to 100% (factory set at 100%).

During a start-up procedure, the current slowly ramps up (walks-in) from 20% of the rated input current to 100% over a 15 to 21 second period. The maximum rate of change of the AC input current is 15% per second. The input current walk-in reduces the start-up surge distortion effects on all other equipment connected to the same source and prolongs the service life of internal components.

Input Current Inrush

The maximum sub-cycle of inrush current due to the optional input isolation transformer is less than 500-800% of the rated input current for the first 1/2 cycle. Without the optional transformer, inrush current is typically less than 2-3 times normal.

Input Power Factor

The rated input power factor is no less than 0.85 lagging at the nominal input voltage and the full rated UPS load. The optional input filter will improve the power factor to better than 0.92 lagging at full load. Refer to published specifications for your UPS model.

2.2.3Battery Charging Circuit

The UPS module charging circuit is capable of recharging the battery plant to 95% of full capacity within 10 times the discharge time. Recharging the last 5% takes longer because of characteristics inherent in the battery. DC ripple voltage is limited to less than 0.5% RMS to preserve battery life during long-term float charging while the UPS system is operating on utility source power.

Multiple UPS module rectifier/chargers can share a common battery plant, if that configuration is preferred for your application.

Operation After Discharge

When commercial power is interrupted, the battery continues to supply DC power to the inverter without inter- ruption to the critical load. If the AC source power is restored before the battery has fully discharged, the rectifier automatically restarts and resumes carrying the inverter and battery recharge load requirements.

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Theory of Operation

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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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