why transfromer rating gives in MVA Or KVA? Why not in MW
or KW?
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Answer Posted / alpha cherian
Transformer Copper loss depends on the current drawn and
Iron loss depends on the Voltage. These are affected by the
load connected to it. While designing it is unpredictable.
Since power factor is not constant "KW" rating will be
wrong. Hence rating in kVA.
Kw rating = kVA rating x Power factor
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