Capacitor
draws a leading current and partly or completely neutralize the lagging
reactive component of load and current. This raises the power factor of the
load.
If
a capacitor is connected in parallel with the load, then the lagging reactive
power of the load will be partly neutralizes, thus improving the power factor
of the load.
Using
capacitors in a circuit changes the reactive power value whereas the active
power remains same in magnitude.
Usually
the value of capacitor is expressed in terms of farads but in power factor
improvements capacitor value is provided in KVAR.
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