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4-Why we measure the insulation resistance of main core and
frame in spite of that must be connected with ground
before energize the transformer?
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Answer Posted / mrudang
the 2 nd answer is quite right ,
actually we have to know the value of core insulation
its resistance , for its condition ,we have the standads
for it , and match with those value
if there is leakge current , the value should be lesser
we are doing between phase- earth , and phase to phase
so we match the phase to phase value also
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