Question 224Electricity & Electronics - QMED

The correct answer is A) opening the bus disconnect links. To safely carry out repairs to a generator circuit breaker, it must be isolated from the bus. This is accomplished by opening the bus disconnect links, which physically and electrically isolate the generator circuit breaker from the main electrical bus. This ensures that no power can flow to the circuit breaker, making it safe to work on. The other options are incorrect because they do not completely isolate the generator circuit breaker from the bus. Opening the generator bus fuse connections (B) or the reverse current relay (C) or reverse power relay (D) may interrupt power flow, but they do not physically disconnect the circuit breaker from the bus, which is necessary for safe repairs.