Answer / alpha cherian

Transformer Copper loss depends on the current drawn and
Iron loss depends on the Voltage. These are affected by the
load connected to it. While designing it is unpredictable.
Since power factor is not constant "KW" rating will be
wrong. Hence rating in kVA.
Kw rating = kVA rating x Power factor

Answer / blaji

loss of trasformer dependes on voltage and current only,
not the angle between them...

anythink give supply rated on KVA--Alternator-chock-trasfo.
anythink takes power termed in KW-light-bulb,load,,,

at the time of designe we do not know about load PF,that y
Alternator rated in KVA,,

but we knew pf of any motor after designe...so we can add it

Power=V*I*pf....bk_kangaonkar@yahoo.co.in

Answer / satish kumar , g.noida

because transformer not is self load.transformer rating
depend upon type of connecting load
(resistive/indactive/capactive).

Answer / satish kumar

Because transformer is not self load so that Transformer
power factor depend upon which type of connected load such
as Resistive/inductive/capactive load

Answer / divya makkar

because transformer have variable power factor so that it is
rated in kva and motor has constant power factor thats why
it is rated in kw

Answer / roushan.eee

MVA OR KVA; WE USE FOR ELECTRICAL O/P.
MW OR KW; WE USE FOR MECHANICAL O/P.

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