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Why a transformer is rated in kVA and not in kW??

Answer Posted / md. samiul islam

In Transformer, there are two types of losses, One is copper
loss (Cu Loss) which depends on current and other is iron
loss which depends on the voltage. Hence total transformer
loss depends upon the Volt-Ampere (VA, so it is independent
of load power factor. This is why a transformer is rated in
KVA instead of KW.

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