Liebert Series 600T manual General Component Descriptions, System Control Cabinet

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2.0THEORY OF OPERATION

2.1General Component Descriptions

The UPS system includes all of the equipment necessary to continuously provide computer-grade AC power to a critical load, even when there is an interruption of the utility line power. It consists of a System Control Cabinet (SCC), UPS modules, and a back-up battery plant. Refer to Figure 6 and Figure 7. Except where otherwise noted, the configuration is presumed to be parallel-redundant (with at least one more UPS module than required to support the rated load).

System Control Cabinet

The System Control Cabinet (SCC) includes system controls, static bypass switch, load transfer control, protec- tive devices, and other accessories. The system controls simultaneously monitor two or more parallel UPS mod- ules sharing a critical load for increased capacity and/or redundancy. The two (2) motor-operated system circuit breakers (system bypass breaker—SBB and UPS output breaker) may be contained within the SCC, depending on the configuration designed for your installation.

System Controls: The system control logic automatically manages critical bus operation and monitors perfor- mance of the UPS modules. Microprocessor technology and dedicated firmware provide advanced logic control and a comprehensive display of information. The system control logic synchronizes the output of the UPS sys- tem to the bypass source. The SCC includes ports for communicating with external devices. Liebert Multi-Mod- ule Units do not require an SCC for load sharing. Automatic, parallel module load sharing is a function built into the modules themselves; however interconnection through the SCC enables the modules to share data for more precise control. Modules do not require master clocks or controls in order to load share or free-run at 60.0 Hz.

Static Bypass Switch: The static (solid-state) bypass switch immediately transfers the load from the inverter to the bypass AC power source in the event of a severe overload on the system or a failure within the UPS. This transfer takes place without any interruption of the power supplied to the load. The system includes redundant circuits to detect and isolate shorted SCRs in the static switch.

Fuses are installed in series with the static bypass circuit to ensure reliable overload protection in the unlikely event of a catastrophic output condition (e.g., a dropped wrench) electrically close to the output of your UPS sys- tem. The static switch SCRs themselves are rated to easily handle the fuse-blowing current.

Bypass Circuit: The bypass circuit consists of electrically operated circuit breakers and associated synchroniz- ing and control circuitry to transfer the load to/from the bypass source.

Theory of Operation

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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 Multi-Module UPS, 65-80 kVA left and 100-500 kVA right System DescriptionProduct Multi-Module 500-750 kVA UPS System Control Cabinets SCCs Types of System Control Cabinets SCCsDesigned for Success ReliabilityOther Factors to Consider Safety Precautions Modes of Operation Operator Controls DIS Product Options System Control Cabinet General Component DescriptionsUPS Module Battery PlantRectifier/Charger Detailed Component DescriptionsControls Hardware FirmwareIsolation Transformer Input Power FactorBattery Charging Circuit Input Circuit BreakerOperation After End-of-Discharge Battery DisconnectBattery Charge Current Limiting Battery Equalize Charge CircuitOutput Regulation and Overload Performance Non-Linear Load CharacteristicsUnbalanced Load Characteristics InverterShorted SCR Monitoring Static Switch IsolationStatic Bypass Fuse ProtectionLoad Transfers Pulsed Parallel OperationTransfer Inhibited Transfer and Retransfer ConditionsAutomatic Transfers to Bypass Manual TransfersManual Retransfers Redundant ModeRetransfer Inhibited Display Screen and Operator Controls FeaturesDescription Function System Control Cabinet Operator Controls Sccb Pictured Description Location Function Shutdown ProceduresSwitches Behind SCC Control Panel Door Menu Tree WALK-IN Display modules only Master Menu ScreenBattery Time modules only Load Transfer Procedures SCC onlyCustomer Alarm Definitions SCC only Input Metering Displays Monitor/Mimic Display ScreenOutput Metering Displays Item 6 System Status Messages Status/Alarm Message AreasItem 7 Alarm Messages Item 5 Module Status MessagesModule Monitor/Mimic Display Screen Item 5 Alarm Messages 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 During Start-Up Walk-In Display ScreenStatus Reports Screen Status Reports ScreensSelect Exit Present StatusEvent History MODULE-0 Event HistoryHistory Status Report Screens History StatusModule SCCSystem Status Battery Cycle Monitor Module OnlyBattery Cycle Monitoring Summary Screen System Configuration System Configuration ScreensDate Screen DateTime Screen TimeDial Auto DialModem Baud Rate Modem Baud RateRetransfer Attempts Maximum Auto-Retransfer AttemptsRemote Monitor Alarm Settings Alarm Limit Settings ScreenProduct Refer to 3.3.2 Load Transfer Procedures for more details Load Transfer Procedures ScreenRefer to 3.3.1 Start-Up Procedure for more details Start-Up Procedures ScreenModule Start- Up Procedures Screen Shutdown Procedures Shutdown Procedures ScreenModule Shutdown Procedures Screen VDC Battery Time Screen Module OnlyBattery Time Screen Example 45 Minute Discharge Aining Rem Tim Calculated La p s e d T im e M in u te s Range of Values for Calculated Battery TimesUP Cursor UP Down Cursor Down Select Choose Meter Calibration ScreenBattery Equalize Recharging Battery Equalize Screen3 Modules Connected Alarm and Status Messages Module Status MessagesLoad Block Messages System Status MessagesOF/UF Abbreviations Used in Alarm MessagesBattery DC Ground FaultBattery CB Open PowerControl Power Manual ResetStatic Switch Bypass PhaseReverse Power AlarmIndications and Other Alarms That Activate Summary Alarms System Configuration Screens or the watchdog timer hasSystem Configuration Screens Load On UPS TemperatureOver-Temperature TimeoutSpecial Functions Alarm MessageRequesting Information Communication InterfacesWorldwide Reporting Auto-DialRemote Monitor Panel Local Reporting to a TerminalLocal Reporting to a Monitor Site Reporting SiteScan or SnmpSeparate / Simultaneous Outputs Scct Load On BypassLoad on Bypass UPS Available OK To TransferLoad on UPS Bypass Available Refer to 3.4 Automatic Operations Momentary OverloadsInput Power Fail Load on Battery Input Power Failure Load On BatteryOne Module Off-Line Load on UPS One Module Off-LineLoad on UPS Battery Not Available Off BatteryEmergency Modules Off Refer to 3.3.3 Shutdown ProceduresEmergency Power Off Emergency Power OffSystem Shutdown Refer to 3.2.10 Maintenance BypassLoad on Maintenance Bypass Two Breakers Load on Maintenance Bypass Three Breakers Refer to 3.4 Automatic Operations for more details Manual ProceduresStart-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 System Bypass Maintenance Bypass Load TransfersMaintenance Bypass If the load is on Maintenance BypassUPS bypass line is still energized Shutdown Procedures System Shutdown Procedure100 Module Shutdown Procedure Local Emergency Modules Off Lemo Remote Emergency Power Off RepoOverloads Without Transfer Automatic OperationsAutomatic Retransfers to UPS Automatic Transfers to BypassAutomatic Emergency Modules Off Automatic Module Off-LineMaintenance DIS Product Training Liebert Global ServicesMaintenance Agreements The Signature Program Professional Start-UpRecord Log Routine MaintenanceAir Filters Battery Safety Precautions Battery MaintenanceDIS Product 112 DIS Product Torque Requirements Matching Battery Cabinets OptionalPower Batteries Rack-Mounted BatteriesDetection of Trouble Torque Specifications Unless Otherwise LabeledCorrective Actions Reporting a ProblemRecommended Test Equipment Rating Environmental Conditions Battery Operation AdjustmentsElectrical Specifications Voltage Harmonic Content Voltage Adjustment RangePhase Balancing Voltage Transient Recovery TimeSeries 600T UPS
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