Answer / arun.giit

as all the losses is in the form of power;and in transformer
iron loss is directly propertional to voltage(V) &copper
loss is propertional to current(I).it is not depend upon
powerfactor,so it's rating is in KVA.

Answer / shaikh

Cu loss of transformer depends upon current I and iron loos
depends upon voltage V...So as we can say that the total
losses of the transformer depend upon VA (volt-ampere) and
independent of phase angle between V & I (i.e. pf
angle)...so transformer rating is in kVA & nt in KW...

Answer / tin`

Becuase kVA is the 'total' apparent power. The load
connected to the transformer can have different power factor
(pf) and so the kW rating will vary according; kW=kVA*pf.
The transformer rating is stated in kVA in order to show
the full capacity of the transformer and then the real
power (kW) rating can vary with power factor.

Answer / salim

bcz
kw=kva×pf and load on tranz.is not constant.So pf is varies with load.thats why traz.rating is always in kva not in kw

Answer / mohan singh

Transformer ratings are in KVA because the power factor is
for the load on which transformer will operate is not known
in manufacturing and KW = V x I x Cos Phi.so it is Rated in
KVA and not in KW.

Answer / peter

coz KW or HP makes no sense.....transformer is not a power
conerter involving mechanical energy.....i mean...it just
transfers electrical energy ....

Answer / bob

Because transformer is power source and active power and
reactive power drawn from it depend on load nutural.

Answer / suresh

Because transformer have electrical output

can we use relay in fan?

0 Answers   NTPC,

Why can't we take NO LOAD TRIAL of motors having V1 mounting??

0 Answers  

what is the power rating of CPU, CRT type moniter, LCD type moniter,scanner Approx.

0 Answers   HAL,

what is excitation/

0 Answers   ABB, Tata Steel Limited,

We have 110Vac ,10A ac supply which is converted into 110VDC & How much DC current? which factor is reqired for dc current calulation?

1 Answers   Suzlon,

What is Partial Discharge test .Please specify that this test can be test on 11/0.433 KV,630 KVA Transformer.

1 Answers   NBCC,

i have installed my solar site of 6.7kw and is working perfectly , can somebody tell me that how can i measure my solar irradiation kw/day/sq m ?

3 Answers  

Suppose i Have an Ac motor of 25Hp 1500 Rpm 50 Hz Can i run a motor 2500 Rpm by AC drives by increasing a frequency either it safe or not ....

2 Answers  

what is B , c & d curves in MCB characteristics i e Full Form of B , C & D . sir please give me answer

1 Answers   NCC,

i have completed deee and i've (June2012-feb 2015 experience in electrical maintenance in pvt ltd company.company having HT & LT electrical power.how to apply electrical C-license ,NOW I was resigned my job,what are requirements of applying for c-license

0 Answers  

what is grounding & what is the value of groumding rod 2.5m?

3 Answers  

what is the working of air compressor.

5 Answers