in power station power measuring unit is KW but in transformer is KVA why?

in power station power measuring unit is KW but in
transformer is KVA why?

Question Posted / hitu_315

4 Answers
7104 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

in power station power measuring unit is KW but in transformer is KVA why?..

Answer / dipak patil

the tf cu losses are proportion to current and irone or no-
load losses are propotional to voltage rating of
transformer. Since losses once available it is essy to
calculate transformer efficiency. Hence tf rating is given
in KVA insted of KW

Is This Answer Correct ?

10 Yes

3 No

in power station power measuring unit is KW but in transformer is KVA why?..

Answer / engr. sumair mir

p.f=kw/kva .... T/f rating is in kva bcoz ,
1- Power factor of the load is not known.....
2- T/F losses depends upon cu- losses(due to current) and
core losses(due to voltage).
due to these resons t/f ratings are in kva.
while for motors and other machines the rating will be in kw
becoz their p.f is known(ranging from .2 to .8 during light
load and peak load period)...

Is This Answer Correct ?

3 Yes

0 No

in power station power measuring unit is KW but in transformer is KVA why?..

Answer / srikanta

generally ratings of electrical machines are depends open losses and power factor.
in case of transformer copper loss depend on current and iron loss on voltage but independent of load power factor,hence it's rating is KVA rather than KW.

Is This Answer Correct ?

2 Yes

0 No

in power station power measuring unit is KW but in transformer is KVA why?..

Answer / mahmood al-ali

1- Any transformer includes core losses and copper losses
2- Core losses are based on input voltage
3- Copper losses are based on current flowing through winding
4- Therefor, total losses are based on voltage in addition to current but not power factor.
Thus, the rating of transformer is done in KVA not in KW

Is This Answer Correct ?

1 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

induction 3 phase motor terminal connection

0 Answers

How to know vacuum in vacuum cylinder of breaker in working condition

0 Answers

Hi friends, i m electrical engineer i want a cdr for migration purpose so anybody have information about this then send me on jayesh_ee88@yahoo.com.please try to me

0 Answers

in a distribution board,if we have a load and we have selected a cable after making all calcs (Deratings and V.D , ect...) the cable we have selected was 10mm.sq. now, shall the internal cable inside the switchboard should be 10 mm.sq Like the external or it can be Less???? if somebody have an specs or information he can help D:

1 Answers

What is difference between incomer & outgoing type Vaccum Circuit Breaker?

2 Answers VBG,

For single phase(phase to neutral) having potential difference 230.in three phase(phase to phase)we have 440V HOW...?

1 Answers

What is meant by SMPS how it working ... and where it used

2 Answers MTS,

In n high voltage 11kv system What happened if 1 of CT cable (IDMT) loose.Will e/f or o/c trip.please explain detail

1 Answers

WHAT IS SYNCHRONISING?

8 Answers L&T,

What Factors should we consider while synchronizing two DG Sets?