why is the rating of transformer done in kva and not in kw.

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Question Posted / samk

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why is the rating of transformer done in kva and not in kw...

Answer / giridha

because the core losses and cu losses depends on only
voltage and current and is independent of power factor so
t/f rating is in KVA

Is This Answer Correct ?

50 Yes

8 No

why is the rating of transformer done in kva and not in kw...

Answer / manthesh.patil

transformer is rated in kva bcoz cu losses are dependent on
current and iron losses are dependent on voltage ,& they are
independent on powerfactor so transformer is rated in kva
not in kw

Is This Answer Correct ?

39 Yes

5 No

why is the rating of transformer done in kva and not in kw...

Answer / lakshmanan m

According to my opinion, manufacturer cant design the
particular transformer for specific load (capacitive or
inductive load) Thats why they dont give the power in KW.
Because KW= vxIx power factor. but power factor is
depending upon the load. So commonly they are give the KVA
power only. It means KVA= Vx I only. According to the load
we can calculate the KW rating.

Is This Answer Correct ?

18 Yes

0 No

why is the rating of transformer done in kva and not in kw...

Answer / manoj-essar

dear manoj, there is no concern of static or rotating
device, then why r u saying in this way?

Trafo is not having unity pf but it depends upon load type
of trafo...(inductive or capacitive or resistive load)

Is This Answer Correct ?

17 Yes

6 No

why is the rating of transformer done in kva and not in kw...

Answer / sachin /vaibhav

as core loss depends upon voltage & copper loss on
current independant of PF. HENCE RATING IS IN KVA

Is This Answer Correct ?

11 Yes

3 No

why is the rating of transformer done in kva and not in kw...

Answer / vasumalai madhavan

In transfomer, the core loss depends upon voltage and
copperloss depends on current , it was (transoformer) not
dependable on power factor . thats why the rating of the
transformer always in kva not in kw....

Is This Answer Correct ?

6 Yes

2 No

why is the rating of transformer done in kva and not in kw...

Answer / shinyvikram ganji

rating of the transformer is done based on losses(core and
copper losses).

Is This Answer Correct ?

4 Yes

2 No

why is the rating of transformer done in kva and not in kw...

Answer / ravi

transformer losses are in terms of current and voltage only
i.e (I Square R) copper loss and VI is the Core loss. i.e y
units are in KVA

Is This Answer Correct ?

3 Yes

1 No

why is the rating of transformer done in kva and not in kw...

Answer / beau

because transformer capacity takes care of both real power
consumed by resistive loads and reactive power in inductive
and capacitive loads such as motors and the transformer's
windings inductive reactance(Apparent power KVA).

Is This Answer Correct ?

4 Yes

2 No

why is the rating of transformer done in kva and not in kw...

Answer / thiyagarajan

kv is an apparent power kw is an active power the ratio
between active and apparent power is power factor ,we dont
know the power factor before connecting to load that why we
are used to refer kv in transmission

Is This Answer Correct ?

1 Yes

0 No