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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 Visit dmohankumar.wordpress.com for Articles and Circuits. Website www.electroschematics.com Visit electroskan.wordpress.com for Hobby Circuits