why is the rating of transformer done in kva and not in kw.

Answers were Sorted based on User's Feedback

why is the rating of transformer done in kva and not in kw...

because the core losses and cu losses depends on only
voltage and current and is independent of power factor so
t/f rating is in KVA

 Is This Answer Correct ? 50 Yes 8 No

why is the rating of transformer done in kva and not in kw...

transformer is rated in kva bcoz cu losses are dependent on
current and iron losses are dependent on voltage ,& they are
independent on powerfactor so transformer is rated in kva
not in kw

 Is This Answer Correct ? 39 Yes 5 No

why is the rating of transformer done in kva and not in kw...

According to my opinion, manufacturer cant design the
particular transformer for specific load (capacitive or
inductive load) Thats why they dont give the power in KW.
Because KW= vxIx power factor. but power factor is
depending upon the load. So commonly they are give the KVA
power only. It means KVA= Vx I only. According to the load
we can calculate the KW rating.

 Is This Answer Correct ? 18 Yes 0 No

why is the rating of transformer done in kva and not in kw...

dear manoj, there is no concern of static or rotating
device, then why r u saying in this way?

Trafo is not having unity pf but it depends upon load type
of trafo...(inductive or capacitive or resistive load)

 Is This Answer Correct ? 17 Yes 6 No

why is the rating of transformer done in kva and not in kw...

as core loss depends upon voltage & copper loss on
current independant of PF. HENCE RATING IS IN KVA

 Is This Answer Correct ? 11 Yes 3 No

why is the rating of transformer done in kva and not in kw...

In transfomer, the core loss depends upon voltage and
copperloss depends on current , it was (transoformer) not
dependable on power factor . thats why the rating of the
transformer always in kva not in kw....

 Is This Answer Correct ? 6 Yes 2 No

why is the rating of transformer done in kva and not in kw...

rating of the transformer is done based on losses(core and
copper losses).

 Is This Answer Correct ? 4 Yes 2 No

why is the rating of transformer done in kva and not in kw...

transformer losses are in terms of current and voltage only
i.e (I Square R) copper loss and VI is the Core loss. i.e y
units are in KVA

 Is This Answer Correct ? 3 Yes 1 No

why is the rating of transformer done in kva and not in kw...

because transformer capacity takes care of both real power
consumed by resistive loads and reactive power in inductive
and capacitive loads such as motors and the transformer's
windings inductive reactance(Apparent power KVA).

 Is This Answer Correct ? 4 Yes 2 No

why is the rating of transformer done in kva and not in kw...

kv is an apparent power kw is an active power the ratio
between active and apparent power is power factor ,we dont
know the power factor before connecting to load that why we
are used to refer kv in transmission

 Is This Answer Correct ? 1 Yes 0 No

More Electrical Engineering Interview Questions

What is effect of over voltage and under voltage on ACB

what is the type of winding connection( star or delta) in 1HP to 5HP motors. How to check the motor winding connections( star or delta) if not provided in the nameplate?

explain impact of tariff on energy management..? and what is ABT tariff

at present how many 765 kv lines are there in india?

IN A SMALL D.C GENERATOR, IF WE REPLACE THE LAMINATED CORE ARMATURE WITH A WOODEN BLOCK OF SAME SIZE & SHAPE AND WIND WIRES WOUND ON THE SLOTS OF WOODEN ARMATURE AND CONNECTED TO THE COMMUTATOR.COMMUTATOR IS FITTED WITH BRUSH TO RECEIVE INDUCED E.M.F.WHETHER E.M.F GENERATED OR NOT?

what is the formula to calculate the distance between one phase to another phase in single phase line and 3 phase line for different volt for example ; 33kv, 11kv ,22kv,230v

what r the types of detectors? state the location these detectors?

what is the difference between capacitive and resistive voltage divider?

how i prepare for the written test in mahagenco?

how much capacity(rating) of generator required to operate a load of 100kv.

how circuit breaker work.. what is the operations taking place inside a circuit breaker when an overcurrent occurs... is it similar to fuse?

What do you mean by cold shinkable cable joint.How it is done.

Categories
• Civil Engineering (5085)
• Mechanical Engineering (4452)
• Electrical Engineering (16638)
• Electronics Communications (3918)
• Chemical Engineering (1095)
• Aeronautical Engineering (239)
• Bio Engineering (96)
• Metallurgy (361)
• Industrial Engineering (259)
• Instrumentation (3014)
• Automobile Engineering (332)
• Mechatronics Engineering (97)
• Marine Engineering (124)
• Power Plant Engineering (172)
• Textile Engineering (575)
• Production Engineering (25)
• Satellite Systems Engineering (106)
• Engineering AllOther (1379)