One "FAWOOMP" was all it took

Yes; FAWOOMP. That's the noise that came from the rotary phase convertor this afternoon. I think it must be another way of saying "you're screwed. I was using the mill most of the weekend until that famous sound this afternoon, along with a flash of light, a pressure wave, hot electrical smell and some smoke. Then a real big silence. The unit was hot and I let it cool for a while. Circuit breaker had tripped also. Reset it and there was horrible rattling sound from the idler motor. Opened up the case and the motor was red hot but still turning at a slower speed and the load meter was jumping from 0-2. There was no 3 phase output. No blown up caps and no burn marks. I am guessing that the auto transformer and possibly a motor phase have blown. You can bet it will be costly. Now to get the heavy frikken thing down off the wall.



I would have gone fishing, but I had found a fuel enrichener jet had been damaged by a previous owner and I was making a T nut to fit the QCTP to the Hardinge to do the repair.



Of course they are all 3ph.



Ken