Referring to the containership one-line distribution diagram shown in the illustration, what is the purpose of the feedback circuit breaker as used to bypass the automatic bus transfer device? EL-0014

Correct Answer: Option C — It allows the emergency generator to feed the main bus during dead ship start up, otherwise it is generally open and not used.

A feedback circuit breaker bypasses the automatic bus transfer to permit the emergency generator to supply the main switchboard bus during a dead ship startup condition. Per IEEE 45 and 46 CFR Subchapter J, this interlocked connection is strictly opened during normal operations to prevent backfeeding hazards.