3-Phase Power Calculator

Formula

P = \sqrt{3} \cdot V_L \cdot I_L \cdot \cos\phi, \quad S = \sqrt{3} \cdot V_L \cdot I_L, \quad Q = \sqrt{3} \cdot V_L \cdot I_L \cdot \sin\phi

Balanced three-phase active real power P (kW), apparent power S (kVA), reactive power Q (kVAR), and power factor cosφ.

Assumptions

• · Symmetrical balanced three-phase AC system with 120° phase displacement between line voltages
• · Line-to-line voltage VL and line current IL measured as RMS values
• · Linear balanced electrical load across all three phases