Kind of sounds like a problem I got called back to work for this week. They lost power to a building. It was a 1200 amp GFI main that tripped. I turned off all the breakers in the dist. panel and reset it. I turned the breakers on one at a time but when I came to a 350 amp. breaker, boom the main would trip. Come to find out we had a bad contactor for a motor.
Do they just reset the main or do they shut all sub panels off and bring them on one a time? That could be a problem if they just reset the main and try to start everything up all at once.
