The power factor correction capacitor should be connected in parallel to each phase load.
Single phase circuit calculation
Power factor calculation:
PF = |cos φ| = 1000 × P(kW) / (V(V) × I(A))
Apparent power calculation:
|S(kVA)| = V(V) × I(A) / 1000
Reactive power calculation:
Q(kVAR) = √(|S(kVA)|2 - P(kW)2)
Power factor correction capacitor's capacitance calculation:
C(F) = 1000 × Q(kVAR) / (2Ï€f(Hz)×V(V)2)
Three phase circuit calculation
For three phase with balanced loads:
Calculation with line to line voltage
Power factor calculation:
PF = |cos φ| = 1000 × P(kW) / (√3 × VL-L(V) × I(A))
Apparent power calculation:
|S(kVA)| = √3 × VL-L(V) × I(A) / 1000
Reactive power calculation:
Q(kVAR) = √(|S(kVA)|2 - P(kW)2)
Power factor correction capacitor's capacitance calculation:
C(F) = 1000 × Q(kVAR) / (2Ï€f(Hz)×VL-L(V)2)
Calculation with line to neutral voltage
Power factor calculation:
PF = |cos φ| = 1000 × P(kW) / (3 × VL-N(V) × I(A))
Apparent power calculation:
|S(kVA)| = 3 × VL-N(V) × I(A) / 1000
Reactive power calculation:
Q(kVAR) = √(|S(kVA)|2 - P(kW)2)
Power factor correction capacitor's capacitance calculation:
C(F) = 1000 × Q(kVAR) / (3×2Ï€f(Hz)×VL-N(V)2)
