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ponkosur
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Join Date: Mar 2013
Posts: 3

IR and PI Tests

04/05/2013 11:49 PM

IR and PI tests are performed frequently for knowing the healthiness of the insulation.After maintenance ,before putting equipment in service and also before carrying out electrical tests this IR and PI is done.Does IR and PI test have any adverse effect on the insulation (oil or solid ) of electrical equipments ?
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lyn
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#1

Re: IR and PI tests.

04/05/2013 11:58 PM

Only if the insulation is defective.

If you're looking for justification for NOT TESTING, don't.
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PWSlack
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#2

Re: IR and PI Tests

04/06/2013 4:36 PM

The purpose of the test is to determine whether the insulation is defective. D'oh!

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electricalexpert65
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#3

Re: IR and PI Tests

04/10/2013 10:12 AM

The magnitude & duration of the IR and/or PI test does not warrant any worry about deterioration of insulation.

But, a HV test would surely do.
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ponkosur
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#4
In reply to #3

Re: IR and PI Tests

04/22/2013 11:51 PM

Thankyou for the reply.Actually DC testing on insulation material such as HIpot test does have adverse effect on it. But I have not noticed any abnormality in the insulation after IR and PI at 5kv max. voltage.It was my apprehension .
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electricalexpert65 (1); lyn (1); ponkosur (1); PWSlack (1)

Previous in Forum: SHELL and CORE Type Transformer   Next in Forum: Effect 380V, 50Hz Motor to be Fed from 400V, 50Hz Supply in DOL Mode

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