bure961
Senior Member
- Location
- Farmingham, MA
When testing insulation with motors is a pass or fail the way to go or should dar or a pi test be the way to do it. 3phase 480. Testing voltage ?
INSULATION TRENDING
- Thread starter bure961
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- Location
- Bremerton, Washington
A megger test is a one shot and you need to have regular readings to compare it to. The best way is to do a dielectric absorbtion ratio test, DAR.
for it you apply test voltage for 1 to ten minutes and plot the readings. The DAR is what is done at the large hydro plants by the BPA. If you google for DAR you should find information.
Biddle has a document called "a manual of insulation testing for the practical man" it may be out there on the web.
I found it on Amazon http://www.amazon.com/Electrical-Insulation-Testing-Practical-Pamphlet/dp/B005JT41AM
I highly recommend this pub. Someone may know where its available for free.
for it you apply test voltage for 1 to ten minutes and plot the readings. The DAR is what is done at the large hydro plants by the BPA. If you google for DAR you should find information.
Biddle has a document called "a manual of insulation testing for the practical man" it may be out there on the web.
I found it on Amazon http://www.amazon.com/Electrical-Insulation-Testing-Practical-Pamphlet/dp/B005JT41AM
I highly recommend this pub. Someone may know where its available for free.
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