how can we calculate that how much capacitor is needed for
a system to increase the pf?

Answer Posted / dinesh lokhande

A simple formula will help to co-orelate power factor, KW
load, and Kvar (i.e reactive power) required.

kvar = KW (Tan Qi - Tan Qd) where,

Qi = Cos inverse pfi = Initial power factor angle
Qd = Cos inverse pfd = Final power factor angle

After calculating Kvar we can select no of capacitors
required by looking at capacitor catalog.

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