Why transformer rating in KVA? and Generator also?

Categories >> Engineering >> Electrical Engineering
Suggest New Category

Why transformer rating in KVA?
and Generator also?

Question Posted / livereason

6 Answers
13317 Views
Bhel, IEEE, Toyo Denki, Toyo Engineering, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

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

Post New Answer

More Electrical Engineering Interview Questions

Efficient electrical earthing in hard rock area

0 Answers

What happens when ac supply is given as excitation voltage instead of dc supply

1 Answers

What will be cross section area of copper conductor for carry 2000 amps & 2500 amps....sq.mm.?/

3 Answers

What are the basic component of a cro?

0 Answers

how we calculate the short circuit capacity of the busbar in LV & HT?

0 Answers

can a generator with 15AH specified battery for starting can be connected to a battery of greater capacity?

2 Answers

which turbine has high thermal efficiency a)open gas turbine b)close gas turbine

2 Answers

how calculation to be done of cable size/o.h. conductor size of 11kv h.t.for the load of 2175 kw

1 Answers Shell,

why any Elelctricity board insist not to change the buren of their metering CTs or PTs for metering purpose? as a example elect. board not accepted that any customer change their metering CT or PT core burden from 5VA to 15VA.. why?

1 Answers

what is the practical definition for voltage

3 Answers

what is the advantage of NiCd battery over Lead acid battery?

2 Answers BARC,

what is the different types of cable lugs?

2 Answers Green Power, Kum Yang,

For more Electrical Engineering Interview Questions Click Here