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Thread: meggar test under high vacuum
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22-02-2014, 01:56 PM #1
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meggar test under high vacuum
Can anybody suggest that why we should not do meggar test of a motor under high vacuum?
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22-02-2014, 02:24 PM #2
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Re: meggar test under high vacuum
Because it screws the motor windings.
Read any of the many previous posts on this forum.
Unless of course you intend to come up with a new way of doing things?
Grizzly
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22-02-2014, 02:36 PM #3
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Re: meggar test under high vacuum
Two reasons, first without the pressure of refrigerant in the compressor there is little to stop the high voltage used in megger testing jumping across windings and connections inside the motor, this can cause tracks similar to old distributor caps and ignition systems in cars, so when you try to run it later on it burns out the motor. Also i expect the resistance values measured would be inaccurate for the same reason causing you to condemn a good motor.
Mostly found in Oxfordshire, UK :)
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22-02-2014, 03:15 PM #4
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Re: meggar test under high vacuum
can anybody answer why you would need to or want to megger a pot under a vac?
Originally Posted by rishab1508
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22-02-2014, 04:40 PM #5
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Re: meggar test under high vacuum
Thanks for your valuable input..
