Answer / k.prakashchandra

PI means 'polarisation index'.It is the ratio of megger
values at 10 th minute and that at first minute.This value
should be more than 1 and more than 1.5 is preferred.For
this motorised megger is required.For appx value, if you do
not have such megger ,values after 60 seconds and 10
seconds may also be considered.

Dear all, is ther any body who can tell me about the setting of ACB(air circuit breaker ). what kind of it,s setting is and how to do it,s setting. also please tell me the setting of VCB(vaccume circuit breaker) . please tell me their setting,s. i will b very thank ful to all of u. Thank,s and Regard,s. Muhammed Ikram.

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kva/kvr

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