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why transformer rating in kva

Answer Posted / x

Major losses in a t/f are copper losses and iron losses.
copper losses depends on load current and iron losses depends on voltage. hence broadly we can say cu-losses proportional to I and core losses prpnl to V so we specify rating of transformer as product of these two VI which in nothing but VA, for transformers of higher rating this will be in KVA or MVA.

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