Answer / pritesh

because transformer depends on voltage and current v*i not
a depend of how much power is transfer so thats why its
rating in KVA.

Answer / rakesh

because its power factor depend on the other load.

Answer / nagaraj .n (bush king)

because trasformer is connected to supply resistive lode
inductive lode &capaitive load .the power factor for those
load is different (lag or leding )it worked apperent power.
the unit of apperent power is volt-aamper.that why
transformer rated in kva.
(its my knowledge)

Answer / kishore

loss coming due to passing of voltage and current

Answer / lalu prasad jadav

because Transformer has Two winding.It becomes very hot
while in running condition.So a considerable amount of heat
loss occured.So the loss in Kw may vary.So Kw rating is
avoided and Kva rating is given in Transformer nameplate.

Answer / rajesh

transformer dosent consume power.it just step up/down the
voltage.thats why transformer mentioned in kva

Answer / sachin

While designing the transformer manufacturer dosenot know
the load power factor.

Answer / kishor a. thakkar

because its load is variable. and motor load is
continuously so we measure in KW. and Trans. measure in Kva.

Answer / naresh

The unit of voltage in Volts
The unit of current in Amperes
When the energy transfer from primary ciruit to secondary
circuit power is constant. there is no involvement of power
factor. Due to this transformer rating in KVA not in KW

Answer / amol

The instruments which converts energy from one form to
another, rated in KW like motor etc which keeps same form
of energy will be rated in KVA like Transformer,stabilizer
etc

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