Overview of 1+1 Redundant Parallel System with Common Battery Bank

NOTE: For UPS with internal batteries, the batteries must be removed and the internal battery breaker (BB) must be opened.
MIB Mains input breaker
BIB Bypass input breaker
UIB Unit input breaker
SSIB Static switch input breaker
UOB Unit output breaker
Ext. UOB External unit output breaker
MBB Maintenance bypass breaker
Ext. MBB External maintenance bypass breaker
BB1 Battery breaker 1
BB2 Battery breaker 2
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