why Transformers power mentioned in KVA?. and why Generators
and Motors power mentioned in KW?.

Answer Posted / j. nagarajan

Actually the question itself is wrong. The rating of
Generators are also mentioned in KVA as both tr. & gen have
a same function of producing apparent power which doesn't
have power factor.

The power factor is a measurement voltage & current utilised
and it will be ratio of apparant power to active power.

But the motors are mentioned in active power as they are
used in various industrial/domestic application utilising
the current & voltage with desired power factor.

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