Why rating of transformer is specified in KVA ,not in KW?

37 Views|Posted 2013-10-21 14:00:29

Asked by Sabir Rizvi

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Answered by

Goutam Chatterjee | Guide-Level 11

2013-10-21 18:44:10

Copper losses of a transformer depend upon current and iron losses depend upon voltage. Hence, total transformer loss depends on volt-ampere (VA) not on phase angle between voltage and current i.e. it is independent of load power factor. That is why transformer rating is in KVA and not in KW.