Answer Posted / biswaranjan das

Transformers Are Rated In Kva Because Generally There Are Two Losses In A Transformer I.e Core/iron Loss & copper Loss Due To Transformer Is A Stready Device So Their Is No Loss Of Mechanical . Due To the Core Losses Depends upon Voltage(v) & copper Losses Depends Upon Current(A) So The total Losses Depends Upon VA I.e KVA .

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