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Motor also having losses, we call KW rating. In
transformer and generator having losses but we call KVA
Rating why?
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Answer Posted / adnan kauchali
Simplest and Guaranteed answer is :
KW and KVA are Active power and apparent power resp.
where Active power(W) needs Power factor known
and apparent power is without power factor.
The Motor's power factor is known so it can be written in
Active Power rating
where in case of generator, there are several connected
loads having different power factor, so we can't calculate
the mean power factor of connected loads hence its rating is
without power factor ; that is VA (volts x amp)
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