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Old January 19th, 2011, 07:27 PM   #7
sthompson
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Join Date: Jan 2007
Location: Vernon, BC
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Quote:
Originally Posted by bornwild View Post
yes, I disconnected the wires form the drive goin to motor. The drive seems to run fine. The display shows it is increasin the frequency. I , still dont get what could be problem. I check resistance betweem UVW and ground all seem ok. I dont think it is drive problem .My electrician says it is motor which is causing this but all seems ok to me.
What is the operating voltage of the VFD/Motor? How are you checking resistance to ground? An Ohmmeter isn't good enough, you need a Megger that puts a high enough voltage on the windings.

Stu....
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