Why transformer rating in KVA? and Generator also?

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Why transformer rating in KVA?
and Generator also?

Question Posted / livereason

6 Answers
11234 Views
Bhel, IEEE, Toyo Denki, Toyo Engineering, I also Faced
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Why transformer rating in KVA? and Generator also?..

Answer / chvnraja

Any device is rated depending on losses of the machine. In a
transformer the losses are iron losses which depends on
voltage and copper losses which depends on current so there
are no losses which depend on power factor hence transformer
is rated in KVA

Is This Answer Correct ?

32 Yes

0 No

Why transformer rating in KVA? and Generator also?..

Answer / rahul

In a transformer Losses(I^2R-Iron and Copper Losses)depends
on voltage(Volts) and current(Amps).so the rating wshould
be in KVA

Is This Answer Correct ?

29 Yes

5 No

Why transformer rating in KVA? and Generator also?..

Answer / a.muthukumar, vacon

Cu loss of a transformer depends on current and iron loss on voltage. Hence, total transformer loss depends on volt-ampere (VA) and not on phase angle between voltage and current. It is independent of load power factor. That is why rating of transformer is in KVA and not in KW.

Is This Answer Correct ?

17 Yes

1 No

Why transformer rating in KVA? and Generator also?..

Answer / nilamanineel@yahoo.com

but nobody did not say about alternator

Is This Answer Correct ?

2 Yes

0 No

Why transformer rating in KVA? and Generator also?..

Answer / deepak

this is because the KVA rating give active plus reactive
power components and the reactive power is associated with
losses of the machines. KW rating tells about the power
being transfered not the losses associated with the process.

Is This Answer Correct ?

3 Yes

8 No

Why transformer rating in KVA? and Generator also?..

Answer / aniket

as the is not known we cannot know the power factor so cant xpress in watts so in kva

Is This Answer Correct ?

5 Yes

14 No

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