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System Overview

UIB Unit input breaker
MBB Maintenance bypass breaker
IMB Internal maintenance breaker
UOB Unit output breaker

UPS System with Maintenance Bypass Cabinet with Input Transformer

NOTE: The internal maintenance breaker IMB* in the UPS cannot be used in a system with a maintenance bypass cabinet with transformer and must be padlocked in the open position.

UPS System with Maintenance Bypass Cabinet with Output Transformer

NOTE: The internal maintenance breaker IMB* in the UPS cannot be used in a system with a maintenance bypass cabinet with transformer and must be padlocked in the open position.
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