APC 480kW 400V manual Isolating one UPS in a Parallel/Redundant System

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Stop/Start UPS and Operating the External Service Bypass

2.7Isolating one UPS in a Parallel Configuration for Service/Maintenance

2.7.1 Isolating one UPS in a Parallel/Redundant System

Mains

Load

Service bypass switch

APC Silcon

UPS

APC Silcon

UPS

In a redundant system one UPS may be isolated for service/maintenance without affecting other parallel UPS(s).

Action

1.Check that the remaining UPS(s) will be able to carry the load when one UPS is isolated.

2.Switch off the system to be isolated for maintenence by pushing the green ON and the red OFF button simultaneously.

3.Disconnect output and mains by setting output switches (Q002) to position 0 and input switch (Q001) to position 0. Disconnect battery by opening battery breaker.

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Contents Copyright 2000 APC Denmark ApS 480kW 400V UPS User GuideThank You Safety Symbols used in this manualUser Guide APC Silcon 480kW 400V UPS Contents Display Unit IntroductionIntroduction Normal operation Load power xx% Stop/Start UPS and Operating the External Service BypassStop UPS for stand-by Start UPS from stand-bySwitching off the UPS Stop UPS for complete power downBlank UPS start-up Start UPS from complete power downDisplay shows System OFF Normal operation load power XX%Bypass operation Operating the External Service Bypass Switch single systemsBypassing the Single System UPS Stop/Start UPS and Operating the External Service Bypass Bypass operation Normal operation Load power 0% System OFF Normal operation Load power 0% Bypass operationBypassing the Parallel UPS System All UPSs Acoustic alarm sounds for 30 secs Stop/Start UPS and Operating the External Service Bypass Press On the keyboard Set input switches Q001 to positionPress the green on button on all systems Isolating one UPS in a Parallel/Redundant System Stop/Start UPS and Operating the External Service Bypass Keyboard OperationOperation Batt. load Batt. tank Using the Remote DisplayDisplay of Measured Values Economy Mode Parameter Settings Parameter SettingsParameter Settings Programming Example Switching to Bypass OperationProgramming Keys Load power xx% Alarms and Events Alarms and EventsDisplaying the Alarm Stack Mode CommentsAlarms Description Action Possible AlarmsDisplay will show invalid UPS data Correction of false alarm situations during service Rectifying Alarm MessagesParallel Operation Alarms Maintenance & Testing Maintenance & TestingBattery Monitoring Test Battery Capacity TestUntil Battery capacity TestTest Xxx Press Test PressAPC Silcon UPS Limited Factory Warranty WarrantyWarranty How to Contact APC How to Contact APCAPC Corporate APC Denmark