ON 20070123@5:16:53 PM at page: http://www.piclist.com/power/overvolt.htm#39105.4768865741 James Newton[JMN-EFP-786] Published and replied to post 39105.4768865741 by viney.chopra |Insert ',' at: '' viney.chopra@albiansands.ca asks:
We have several VFD driven 4160V motors. Very frequently, the 5kV power cable develops blisters on it's outer jacket. It's not overcurrent, because the conductors are OK. I think it's over-voltage that can cause jacket damage ( BIL issue ? ). Have been trying to figure out why there should be an over-voltage ( if my premise is correct ) at all. Could it be harmonics causing it ? Any thoughts ? Any similar experiences ? Would appreciate hearing from concerned people.
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' ON 20070123@5:18:03 PM at page: http://www.piclist.com/techref/power/overvolt.htm# James Newton[JMN-EFP-786] edited the page. Difference: http://www.piclist.com/techref/diff.asp?url=H:\techref\power\overvolt.htm&version=7