Main Supply Ac Circuit Breaker - Vanguard CPW 125-4-S Series Operation And Maintenance Manual

Main Supply AC Circuit Breaker

Warning! Shock/Electrocution Hazard! Read and understand the instructions and warnings in the Operation and
Maintenance Manual. Failure to follow the instructions or heed the warnings could cause serious injury or death.
High voltage poses an electrocution hazard; this equipment must be operated by qualified personnel only.
DO NOT OPEN the inner main panel door unless you are a qualified service technician, and are familiar with the
dangers of high voltage. DO NOT REMOVE the rear access cover unless you are a qualified service technician, and
are familiar with the dangers of high voltage. The main electrical lines coming into the bottom of the main supply AC
circuit breaker (CB1) from the genset are LIVE, and HIGH VOLTAGE is present on the main incoming lines
WHENEVER the genset is running, EVEN WHEN THE MAIN CIRCUIT BREAKER (CB1) IS DE-ENERGIZED
CB1
037-05-63-310B
037-05-63-312B
(O).
Figure 30: Main Supply AC Circuit Breaker
CB1 Main Supply AC Circuit Breaker — Use this circuit breaker to energize (I) or to de-energize (O) the main AC
supply circuit. No power is available to the other AC circuits until this breaker is set (I). In order to reset the breaker, it must
first be switched to (O) and then to (I).
Note: The main supply AC circuit breaker can only be set when the genset is running at rated speed.
46
037-08OP-002D-01 S/N CB50600021 – UP (Weld-deck)