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Old 02-18-2012, 01:51 PM   #28 (permalink)
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As a beginner to motor winding I feel its important to distinguish the difference between
meggar (1000V) meter and a standard multimeter (ohm).

perhaps more experience guys can help with this.

this is what I know so please correct me if I'm mistaken.

faulty Insulation resistance may pass with a multi meter - 9v battery typical
however with a potential voltage of up to 1000v for testing the megger will highlight the fault.
I suppose the idea with the meggar is based on the principle that insulation should be tested a little above its normal operating voltage where a standard ohm 9V meter may pass inspection of shorts.

not sure if this applies but I've read that insulation that initially tests good can start to leak and fail after a few minutes of stress. true or false ?

Please advise.


Originally Posted by ZuvieleTeile View Post
I would like to ask all of you, what other kind of equipment you use.

E.g. a lot of guys do a 1000 Volt test. Can be done with special Insulation Tester/ Megger.
What kind of experience you do have with those.
Looked some handheld ones up on the net. They go from 40 bucks up to 1500 bucks.
Big difference. I don't know, if we have use for all those expensive built-in features.
What do we really need here?

On the same token, how do you guys hold your stator. With a vice or by hand?

I saw the vice method in the winding video and found it a good idea except the jaws didn't have any soft cover, aluminum, lead etc.
So, I prepared my small Hobby vice in a way by fabricating two pieces of Lexan, which are screwed to the jaws in order to protect the stator from getting damaged.
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