Answer / k.prakashchandra

LT means voltage up to 250 V (medium 650V) HT -up to 33000V
as per IE Rules 1956

There is one 40MVA oil cooled transformer (yet to commission), filled with 95% oil and we are trying to fill 5% Nytrogen in that transformer so that there should not be any foreign component inside. But even though there is no leakage, nytrogen is not withstanding inside transformer, within a day or two pressure guage is showing 0. Why is it soooo? Pls reply.

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