American Power Conversion 60-80kW 208/480V 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

Utility

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 red OFF button.

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

2.7.2Switching Back the UPS to Normal Rarallel/Redundant Operation

Action

1.Set the input switch (Q001) and the output switch (Q002) to position 1.

2.Charge capacitors, connect battery, and start up the UPS as described in 2.4.1. Start UPS (from complete power down).

The UPS will automatically switch to normal operation and start load-sharing with the other parallelled UPS(s).

WARNING!

The system will discharge built-in capacitors.

ALWAYS check with a multimeter that the terminals contain no dangerous voltage before touching the system!

990-4035

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User Guide APC Silcon 60-80kW 208V/480V UPS

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Contents APC Silcon 60-80kW 208/480V UPS User Guide Copyright 2000 APC Denmark ApSUser Guide APC Silcon 60-80kW 208V/480V UPS Safety Symbols used in this manualThank You Contents Introduction IntroductionDisplay Unit Stop UPS for stand-by Stop/Start UPS and Operating the External Service BypassStart UPS from stand-by Stop UPS for complete power down Switching off the UPSStart UPS from complete power down UPS start-upSystem start-up now completed Operating the External Service Bypass Switch single systems Bypassing the Single System UPSUPS YES Bypassing the Parallel UPS System All UPSs Acoustic alarm sounds for 30 secs Stop/Start UPS and Operating the External Service Bypass Set input switches Q001 to position Isolating one UPS in a Parallel/Redundant System Stop/Start UPS and Operating the External Service Bypass Operation OperationKeyboard Display of Measured Values Batt. load Batt. tankUsing the Remote Display Economy ModeParameter Settings Parameter SettingsParameter Settings Programming Keys Switching to Bypass OperationProgramming Example Load power xx% Alarms and Events Alarms and EventsDisplaying the Alarm Stack Mode CommentsPossible Alarms Alarms Description ActionUnlock Rectifying Alarm Messages Parallel Operation Alarms Correction of false alarm situations during serviceMaintenance & Testing Maintenance & TestingBattery Monitoring Test Battery Capacity TestUntil Warranty WarrantyAPC Silcon UPS Limited Factory Warranty How to Contact APC How to Contact APCAPC Corporate APC DenmarkUser Guide APC Silcon 60-80kW 208V/480V UPS User Guide APC Silcon 60-80kW 208V/480V UPS