explain me how a power factor is improved by adding a
capacitor?what capacitor do to improve it?in simple words
and in detail?thx
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Answer Posted / mohan
An electrical load can be inductive or resistive(filament
bulb).
for an inductive load the energization power is required ,
isnce this is called reactive power(imaginary magantising
power) , which is non productive.
You can draw paralles to your Savings Bank account - where
you need to maintain certain amount as minimum balance,
which you can not withdraw.
again this "magnatising current" is load dependant and will
varry according to the load. for example if you are riding
a bicycle , the minimum force needed to be given for moving
the cycle must be higher than than Weights(your+Cycle)
*gravitation force.
The base value weight* gravitational force can be imagined
as reactive power and, when you ride the cycle in elevated
path u put extra energy and on a slope u need less energy.
Capacitor is a supplier of reactive energy and if you use
capacitor to compliment the reactive power then you will
have reduced kva withdrawal from grid.
KVA = SQRT[kw*kw)+(kvar*kvar)]
PF = kw/kva. in other words PF is the efficincy of yor
power conversion. since it is the ratio of output(KW you
consume ) to the input(the withdrawal from grid)
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