Download Power Factor Correction- Calculation

Power factor correction formula
The following formulae are used to calculate the value of power factor correction
capacitor
1. Apparent power
It is the load voltage x Load current
Eg. Load voltage = 230V
Load current = 10A
Then 230x10 = 2300 VA or 2.3 KVA
2. Power factor
It is the True power (W) divided by the Apparent power
Eg. True power = 1KW
Apparent power = 2.3KVA
Then PF = 0.43
3. Reactive power or KVAR
It is used to calculate the capacitor value for the particular power factor
Eg. True power = 1KW
Apparent power = 2.3KVA
Reactive power Q =
Then Q = V2 / X
X is the load Rectance and Q is the Reactive power
Eg. (230)2 / 2.07 = 25555= 25.5 Ohms
Capacitance C = 1 / 2Pi.f.c = 1 / 2x3.14x50x25.5
1 / 8007 = 0.0001249
That is 0.0001249 x 106 = 124.9uF
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