98 Operation
Maintenance Bypass Load Transfers
Tomanually transfer the load between Maintenance Bypassand the UPS system bypass line, carefully follow
theseinstructions. Do not transfer the load between MaintenanceBypass and the UPS system (module inverters)
output.Use the SCC Monitor/Mimic Display screen to verifythe UPS system bypass line is available.
Ifthe load is on the UPS System Bypass:
a. Closethe Maintenance BypassBreaker (MBB).
b. Verifyclosure of the MBB. Then opent heMaintenance Isolation Breaker (MIB). Load is now on
Maintenance Bypass.
c. If UPS bypassshutdown is required, open the Bypass Input Breaker (BIB).
Ifthe load is on Maintenance Bypass:
a. Closethe Bypass Input Breaker (BIB) or verify BIB is closed. Note thatUPS System Bypass circuit
breaker(motorized) must also be closed.
b. Closethe Maintenance Isolation Breaker(MIB).
c. Verifyclosure of the MIB. Then open the Maintenance BypassBreaker (MBB). Load is now on UPS
System Bypass.
CAUTION
Make sure you understand the proper sequence before operating a ny circuit
breaker.Operating a Maintenance B ypass circuit breaker out of sequence could
cutoff power to the critical load.
DISCONTINUED
PROD U C T