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12 User Guide APC Silcon 240-320kW 480V UPS
990-4039
Stop/Start UPS and Operating the External Service Bypass
2.6 Operating the External Service Bypass Switch (parallel systems)
2.6.1 Bypassing the Parallel UPS System (All UPSs)
Service
bypass
switch
Load
Utility
APC Silcon
UPS
APC Silcon
UPS
Q010a
Q001a
Q002a
Q004
Q010b
Q001b
Q002b
Q003
H003
H004
H002b
H002a
H010a
H010b
switch
Service
bypass
Load
APC Silcon
UPS
APC Silcon
UPS
switch
Utility 1
Utility 2
Single Utility
Dual Utility
CAUTION!
Do not leave UPS out of service for more than 48 hours. Refer to section 2.3 Stop (for complete
power down).