Power rating of a generator and transformer is outline
because the power which might be delivered by a generator and transformer
safely and efficiently under some specific situation. Growing load, increases
losses in generator and transformer.
Video Source By- Learning Engineering
As we also know, cupper loss of a generator and transformer
depend upon current and iron loss on voltage. Hence, total generator and
transformer loss depends on volt ampere (VA) and not on the phase angle between
voltage and current. It’s independent of load power factor. That’s why rating
of generator and transformers is in KVA and not kilowatt.
Although losses of generator and transformer depend on its
KVA or MVA rating however actual output varies with electrical power factor.
The electrical output of A generator and transformer is product of power factor
and Volt Ampere and output is expressed in kilowatt. Typically alternators and
transformer also are rated by its power rather than volt-ampere rating.
