I am hoping that someone on here can give me some insight on what caused this. I have my idea; however, I would like someone to give their opinion also. At work we have a 13000 volt motor that powers our compressor. How frequent can that size motor be started without causing the motor to overheat or the switch gear to catch fire? We started this compressor 6 times in approx 5 hours and on the last start the switch gear buss caught fire. I know a 4160 volt motor can only be tried 2 times within 30 minutes then it must rest for 4 hours before another attempt.