Graded Insulation of Transformer| Non uniform insulation of Transformer

[@velmuruganperumal5322]

Basics well explained using good hand sketches and good English communication. Thank you.

[@vibhanikhil3464]

Nice explanation

[@bhukyanagarajunaik7330]

Which IS should be referred sir??

[@avinashkumarsingh5896]

Sir will you pls introduce us of all faults standard