Answer / rahul khurana

In transformer there are tho typw of losses core losses and
copper losses. core losses depends upon voltage and copper
losses depend upon current. there is no windage losses in
transformer whereas in motor it occurs.
so, in conclusion there is no any factor in transformer
which relates with power factor so the rating of
transformer is in KVA instead of KW.

Answer / ganesan

The copper loss of a transformer depends on current and iron
loss depends on voltage.Hence total losses depends on volt
ampere(VA) only and it is independent of load power
factor.That is why the rating of Transformer is given in KVA.

Answer / gms

RATING is given in kw when we have any knowledge about the power factor of the load which is to be connected on the output side.
in case of the transformers we have no information about the power factor of the load so it is evident to define its ratings in terms of (VA)

Answer / athul thilak

there are two losses in transformer.copperloss and iron
loss.these two factors are not affected by power
factor.hence transformer is rated in kva

Answer / aashwin p

Transformer is a show the capacity in Kva
And
Motor KW shows a How much Power Consumtion on it

Answer / prabhakar jha

Transformer wattage is not fixed.motors power is fixed.

Answer / zeyad

when we calculation the power of motor : p= v*i *cos&
but when ------------------------ trans : s= v*i = va
at trans total power maen that : s=p+q
wher: s = total power or apparent power
p= active power( this is the force depent in motion
motor )
q= reactive power( depend in sometime losses)
wehre cos&= real power/apparent
finaly all of above are unit of power

Answer / kirtan

in transformers the output depends upon voltage and ampere
and in motors it depends upon power.

Answer / simza

it is because a transformer uses ac voltage and therefore
the voltage and current are not always in phase whereas a
motor uses dc voltage to produce the turning effect(voltage
and current are always in-phase)

Answer / basheer ahmed

BECAUSE A TRANSFORMER HAS ELECTRIC ENERGY AT INPUT AND
OUTPUT SIDE WHEREAS A MOTOR HAS MECHANICAL ENERGY AT THE
OUTPUT. MECHANICAL ENERGY HAS THE UNIT OF WATTS.

if voltage is not builed up in small generator what will be the reason?

7 Answers   century,

What is icu and ics in Acb and how many time icu or ics passes from breaker?

0 Answers   Engineering Vision,

why AC voltage source are generate as 50 Hz ?

4 Answers  

If i am running of spindle at 2000rpm ,but How to spindle stop at the second I am resetting the machine in CNC machines

0 Answers  

What is the comparison of PILC and XLPE cable

0 Answers  

The iron loss in a 100kva transformer is 1 kw and full load copper losses are 2 kw, then what is maximum efficiency occure at a load?

3 Answers   MPSC,

What are the uses of stepper motor?

0 Answers  

why core losses are affected with change in voltege in transformer?

1 Answers   HCL,

how to decide no of electrodes for 1600A LT Main incomer panel

0 Answers  

Hy the hydro power stations have high transmission and Distribution costs?

3 Answers  

what is a relation of energy in electromagetic field

1 Answers  

What is accuracy of a measurement?

0 Answers