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why transformer ratings in kva?
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Answer Posted / neeti singh
This is due to the fact that rated transformer o/p is
limited by heating and hence by the losses in transformer.
The two type of losses in transformer are core loss and
ohmic loss.
The core loss depends on transformer voltage(V) and ohmic
loss depends on current(I)As these losses depends upon V & I
and are almost unaffected by the load pf, the transformer
o/p is expressed in VA(V*I) or in kVA and not in kW.
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