| Calculation | Formula |
|---|---|
| Power factor (PF) | PF = P / S |
| Apparent power (S) | S = P / PF |
| Reactive power (Q) | Q = √(S² - P²) |
| Power factor correction capacitor's capacitance | C = Qc / (2πfV²) |
Power factor (PF) is the ratio of working power (real power, measured in watts) to apparent power (measured in volt-amperes). It indicates how effectively electrical power is being used.
Power factor correction is the process of improving the power factor by adding capacitors to offset the inductive reactive power. This reduces energy losses and improves system efficiency.