Why transformer ratings in KVA not in KW?

Answer Posted / kotaprolu.raneela

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in transformer we only bother with voltage rating and
losses.the 3 phase power is given by [sqrroot3* vi cos
(fi)].the power factor cos(fi) depends on the load we
connect.we dont know the type of load.so the rating of
transformer is in kva but not in kw...

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