Hi All,
I have an AB 1336-IMPACT drive, 460v 3ph 10HP. It will run fine for various periods of time but then trips-out with a "ground fault" #12018. The vfd and the motor and wiring have all been checked numerous times and no ground has been found. Incoming power is fine and I have 5 other identical vfd's running the same type of machinery with no problems. Any ideas? Thanks.
Matt