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
5692 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

Recently we had experienced following problem All RCCB breakers (connected to the load as well as spares) connected to various UPS systems at various floors at a high rise building tripped during a power break down and upon starting up of generator.This Generator is recently inducted into the installation. Can any one explain the reason behind this tripping. Regards Viswanathan

1 Answers

Please tell me what is the difference between online UPS & OFF line UPS?

2 Answers HAL,

If not maintained 3 phase clearance,what happened ?

2 Answers

may anybody tell me the names of institute where plc programing course are conducted

1 Answers

hi frienda We have 250kva cater pillet dg set we are fasing one diffrent proublam in dg we are start dg set after one mint applying load around 450a load but dg was run 3 Or 4 mints after 3 mints dg was shuding down automatic how to face this proublam pls tel any budy

2 Answers

what is slip ring startor

1 Answers

If two generator running parallel, at that condition both ngr Taken in line or taken any one ngr, but why any one or both Ngr in line? Ngr is use for which purpose?

3 Answers

What the purpose of transient fault recoredr in substation

2 Answers NCC,

How do we calculate the Out put voltage of generator, after the excitation is being given?

0 Answers

A double circuit with dog conductor 66KV Transmission line from wind farm evacuation to feeding substation having capacity of 25MW for transmission. Can same transmission network be considered for further expansion of Power & how much in MW. If we need to expand next 10-15 MW more will there any augmentation is required in transmission network? Kindly reply asap.

0 Answers

Why the isolation treasforfer are connected at out put of the ups ig 200kva ??????????????????

3 Answers

Why PT burnts?

2 Answers

For more Electrical Engineering Interview Questions Click Here