OK To Transfer, Load on Bypass UPS Available | Liebert Series 600T

3.2.2OK To Transfer

The OK to Transfer status message will be displayed when the bypass line and UPS system output power are both available, their voltage, frequency, and phase synchronization are matched within specifications, and the Static Switch Disconnects are closed (ON). An alarm message may be displayed to indicate Load On Bypass. If no alarm is displayed, the operating status is Load On UPS.

When the OK to Transfer message is displayed, you can perform a manual transfer of the load from the UPS sys- tem to bypass, or a manual retransfer of the load from bypass to the UPS system.

Use the Load Transfer Procedures screen at the SCC when performing a manual transfer. Refer to 3.3.2 - Load Transfer Procedures.

The UPS system control logic at the SCC will initiate an automatic transfer to bypass if an overload condition exceeds the system current versus time window, or if a UPS module is taken off line while the system is operat- ing in the non-redundant mode. An automatic retransfer to the UPS system may be initiated when recovering from system overloads lasting less than five minutes. Refer to 3.4 - Automatic Operations.

NOTE

When the critical load is being supplied power from the bypass line, it is exposed to utility power disturbances.

Figure 48 Load on Bypass (UPS Available)

RIB

RIB

RIB

BFB

UPS #3

UPS #2

UPS

#1

CB1

CB1

CB1

SBS

R

R

R

BIB

SBB

I

I

I

MBB

CB2

CB2

CB2

System

SKRU

Controls

Output MIB

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

Operation 79

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PRODUCT

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Liebert Series 600T manual OK To Transfer, Load on Bypass UPS Available

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 Description Product Multi-Module 500-750 kVA UPS System Control Cabinets SCCs Types of System Control Cabinets SCCs Designed for Success ReliabilityOther Factors to Consider Safety Precautions Modes of Operation Operator Controls DIS Product Options System Control Cabinet General Component Descriptions UPS Module Battery Plant Controls Hardware Detailed Component DescriptionsFirmware Rectifier/Charger Battery Charging Circuit Input Power FactorInput Circuit Breaker Isolation Transformer Battery Charge Current Limiting Battery DisconnectBattery Equalize Charge Circuit Operation After End-of-Discharge Unbalanced Load Characteristics Non-Linear Load CharacteristicsInverter Output Regulation and Overload Performance Static Bypass Static Switch IsolationFuse Protection Shorted SCR Monitoring Load Transfers Pulsed Parallel Operation Automatic Transfers to Bypass Transfer and Retransfer ConditionsManual Transfers Transfer Inhibited Manual Retransfers Redundant ModeRetransfer Inhibited Display Screen and Operator Controls Features Description Function System Control Cabinet Operator Controls Sccb Pictured Description Location Function Shutdown Procedures Switches Behind SCC Control Panel Door Menu Tree WALK-IN Display modules only Master Menu Screen Battery Time modules only Load Transfer Procedures SCC onlyCustomer Alarm Definitions SCC only Input Metering Displays Monitor/Mimic Display ScreenOutput Metering Displays Item 7 Alarm Messages Status/Alarm Message AreasItem 5 Module Status Messages Item 6 System Status Messages Module Monitor/Mimic Display Screen Item 5 Alarm Messages Alarm Messages MOD 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 Screen Status Reports Screen Status Reports Screens Select Exit Present Status Event History MODULE-0 Event History History Status Report Screens History Status Module SCC System Status Battery Cycle Monitor Module Only Battery Cycle Monitoring Summary Screen System Configuration System Configuration Screens Date Screen Date Time Screen Time Dial Auto Dial Modem Baud Rate Modem Baud Rate Retransfer Attempts Maximum Auto-Retransfer Attempts Remote Monitor Alarm Settings Alarm Limit Settings Screen Product Refer to 3.3.2 Load Transfer Procedures for more details Load Transfer Procedures Screen Refer to 3.3.1 Start-Up Procedure for more details Start-Up Procedures Screen Module Start- Up Procedures Screen Shutdown Procedures Shutdown Procedures Screen Module Shutdown Procedures Screen VDC Battery Time Screen Module Only Battery 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 Times UP Cursor UP Down Cursor Down Select Choose Meter Calibration Screen Battery Equalize Recharging Battery Equalize Screen 3 Modules Connected Alarm and Status Messages Module Status Messages Load Block Messages System Status Messages OF/UF Abbreviations Used in Alarm Messages Battery CB Open DC Ground FaultPower Battery Static Switch Manual ResetBypass Phase Control Power Indications and Other Alarms That Activate Summary Alarms AlarmSystem Configuration Screens or the watchdog timer has Reverse Power Over-Temperature TemperatureTimeout System Configuration Screens Load On UPS Special Functions Alarm Message Worldwide Reporting Communication InterfacesAuto-Dial Requesting Information Local Reporting to a Monitor Local Reporting to a TerminalSite Reporting SiteScan or Snmp Remote Monitor Panel Separate / Simultaneous Outputs Scct Load On Bypass Load on Bypass UPS Available OK To Transfer Load on UPS Bypass Available Refer to 3.4 Automatic Operations Momentary Overloads Input Power Fail Load on Battery Input Power Failure Load On Battery One Module Off-Line Load on UPS One Module Off-Line Load on UPS Battery Not Available Off Battery Emergency Modules Off Refer to 3.3.3 Shutdown Procedures Emergency Power Off Emergency Power Off System Shutdown Refer to 3.2.10 Maintenance Bypass Load on Maintenance Bypass Two Breakers Load on Maintenance Bypass Three Breakers Refer to 3.4 Automatic Operations for more details Manual Procedures Start-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 Maintenance Bypass Maintenance Bypass Load TransfersIf the load is on Maintenance Bypass System Bypass UPS bypass line is still energized Shutdown Procedures System Shutdown Procedure 100 Module Shutdown Procedure Local Emergency Modules Off Lemo Remote Emergency Power Off Repo Overloads Without Transfer Automatic Operations Automatic Retransfers to UPS Automatic Transfers to Bypass Automatic Emergency Modules Off Automatic Module Off-Line Maintenance DIS Product Maintenance Agreements The Signature Program Liebert Global ServicesProfessional Start-Up Training Record Log Routine MaintenanceAir Filters Battery Safety Precautions Battery Maintenance DIS Product 112 DIS Product Power Batteries Matching Battery Cabinets OptionalRack-Mounted Batteries Torque Requirements Detection of Trouble Torque Specifications Unless Otherwise Labeled Corrective Actions Reporting a ProblemRecommended Test Equipment Rating Environmental Conditions Battery Operation Adjustments Electrical Specifications Phase Balancing Voltage Adjustment RangeVoltage Transient Recovery Time Voltage Harmonic Content Series 600T UPS