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
7224 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

what is the minimum voltage require to injure our body?

4 Answers

I have 2 transformers in two different plants, both are without OLTC but i am facing problem of voltage fluctuation at LV side from only one transformer. i have to change its taps manually twice in a day. Another transformer delivering voltage is ok. Please guide me about the problem

1 Answers

how can the active power and reactive power of an alternator be controlled?

6 Answers

what reactive how to maintain

0 Answers

how to calculate IR value of 33KV cable ??

0 Answers

What do you mean by the zone of protection?

0 Answers

why in India it is maintained for exactly 50HZ frequency, why it is not that 49Hz,why it is so?

2 Answers

we can conformed the vector group of the transformer. How?