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Power factor calculator

Power factor calculator. Calaculate power factor, apparent power, reactive power and correction capacitor's capacitance.

This calculator is for educational purposes.

kW
A
V
Hz
kVA
kVAR
ยตF

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Single phase circuit calculation

Power factor calculation:

PF = |cos ฯ†| = 1000 ร— P(kW) / (V(V) ร— I(A))

Apparent power calculation:

|S(kVA)| = V(V) ร— I(A) / 1000

Reactive power calculation:

Q(kVAR) = โˆš(|S(kVA)|2 - P(kW)2)

Power factor correction capacitor's capacitance calculation:

Scorrected (kVA) = P(kW) / PFcorrected

Qcorrected (kVAR) = โˆš(Scorrected (kVA)2 - P(kW)2)

Qc (kVAR) = Q(kVAR) - Qcorrected (kVAR)

C(F) = 1000 ร— Qc (kVAR) / (2ฯ€f(Hz)ร—V(V)2)

 

Three phase circuit calculation

For three phase with balanced loads:

Calculation with line to line voltage

Power factor calculation:

PF = |cos ฯ†| = 1000 ร— P(kW) / (โˆš3 ร— VL-L(V) ร— I(A))

Apparent power calculation:

|S(kVA)| = โˆš3 ร— VL-L(V) ร— I(A) / 1000

Reactive power calculation:

Q(kVAR) = โˆš(|S(kVA)|2 - P(kW)2)

Power factor correction capacitor's capacitance calculation:

Qc (kVAR) = Q(kVAR) - Qcorrected (kVAR)

C(F) = 1000 ร— Qc (kVAR) / (2ฯ€f(Hz)ร—VL-L(V)2)

 

Calculation with line to neutral voltage

Power factor calculation:

PF = |cos ฯ†| = 1000 ร— P(kW) / (3 ร— VL-N(V) ร— I(A))

Apparent power calculation:

|S(kVA)| = 3 ร— VL-N(V) ร— I(A) / 1000

Reactive power calculation:

Q(kVAR) = โˆš(|S(kVA)|2 - P(kW)2)

Power factor correction capacitor's capacitance calculation:

Qc (kVAR) = Q(kVAR) - Qcorrected (kVAR)

C(F) = 1000 ร— Qc (kVAR) / (3ร—2ฯ€f(Hz)ร—VL-N(V)2)