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How the Transformer oil testing is done & Why oil dielectric
goes LOW & what is solution for that ??
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Answer Posted / pillay
The sample oil to be tested for dielectric test is collected
and put into the tester and the average of 6 tests is
taken.The minimum withold voltage is as per local regulations.
causes of low dielectric results are usually exposure of the
insulating oil to moisture through the breather or there is an
exposed opening, poor quality oil being used. high acidic
content.The insulating oil should be replaced or dehydrated.
breathers silica gels should be maintained good all the time
and check for any leaks or any exposure to atmosphere must be
rectified.
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