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Question 
why designer use kva rating instead of kw in transformer 
rating???????????????
 Question Submitted By :: Subhendu
I also faced this Question!!     Rank Answer Posted By  
 
  Re: why designer use kva rating instead of kw in transformer rating???????????????
Answer
# 1		 
The KVA rating of a transformer takes into account the 
power factor of the supply system. i.e. If you have a 100kW 
load on your system with a supply power factor of 0.8 then 
your transformer will need to be at least 125kVA. p.f = 
KW/KVA. So to answer the question a KVA rating allows for 
the fact that differnt installations can have different 
power factors.
 
Is This Answer Correct ?    0 Yes 5 No
Blake
 
  Re: why designer use kva rating instead of kw in transformer rating???????????????
Answer
# 2		 
Transformer are always rated in Kva because there are 2 
losses in transformer.
one is copper loss which depends on current & the other is 
iron loss which depends on voltage & not affected bypower 
factor.
Thus transformer rating in kva & not in kw.
 
Is This Answer Correct ?    8 Yes 1 No
Minal
 
 
 
  Re: why designer use kva rating instead of kw in transformer rating???????????????
Answer
# 3		 
Transformer rating written in always kva because depends
upon the voltage and current rating.
 
Is This Answer Correct ?    0 Yes 0 No
Devi
 

 
 
 
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