VFD Help

J

Thread Starter

Jameson

I have had 2 VFDs on the same piece of equipment go bad by an apparent
line to line short circuit. It destroyed the line contactor, tripped the motor circuit breaker, the feed circuit breaker, and the main circuit breaker feeding the panel. Motor was meggered line to line, and line to ground with no bad readings. It is now running fine in bypass mode.

Any help would greatly be appreciated.
 
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