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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User Guide APC Silcon 480kW 400V UPS

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