ECN Forum Forums General Topics of the Trade General Discussion Area 1600 A breaker trips for unknown reason

If it's a Digi-Trip, you should have a flag showing ground fault, instantaneous, short time, or long time trip. The flag shouldn't clear until you press the reset button.
Joe

I forgot to ask if the breaker had a UV trip option installed. Also, if the breaker hasn't been maintained for a while, it's probably time to rack it out and hook it up to the test set. Remember to check all 3 channels. I've seen breakers not meet spec until the dials were exercised.