Answer Posted / princealekota

Since transformer is a static there will not be any
rotational losses it have only iron loss depend upon
voltage and copper loss depend upon current

for AC supply systems like generator, transformer rating is
done in KVA because of inductance present in AC . we don't
know load is resitive or inductive

so we will take load KW=KVA,

power = voltage*current*cos(pi)
if load isinductive cos(pi) have some value less than 1
if load is resistive cos(pi)is 1

please send the IS strandard for electrical to sakthi_murugan86@yahoo.co.in

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I am going to appear for the RRB Chennai Section Engineer online exam. Please send me the question papers from 2001 to date to my mail id:upendrakrishna20@gmail.com,plz send me ,or send any other rrb papers plzzzzzzzzzzzzzzzzzz

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