if we convert ampers into kw,which one formula use by
us,pls tell me?
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Answer Posted / pillay
there is no one formula only.
there are some formulas that you must know,,
you must know how to use the correct one when you need it.
for DC power it is always just voltage x current = watts
for AC single phase it is always volt x current x pf = watts
for AC 3 phase it is root 3 x volt x current x pf = watts
the watts than you change to KW or MW if necessary.
this are all for real calculations. when you practice with it often than you will be able to give an estimate bcos the pf varies according to situation.
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