A 1,200A feeder breaker has tripped six times in the last month. Before resetting it, electricians checked for ground faults and didn’t find any. After resetting it, everything was fine for several days.
The production superintendent wants it replaced. He says he’s replaced breakers in his home and maintenance should just replace an obviously bad breaker.
The replacement costs just over $25,000 so the plant manager has a different opinion on breaker replacement