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Three Phase Voltage by Two Wattmeters Method
Computes total three-phase power from two wattmeter readings using: P = V12×I2×cos(30°+θ) + V13×I3×cos(30°−θ), where θ is the displacement angle between voltage and current.
Inputs
Line voltage V12 measured at wattmeter 1 in volts
Line current I2 measured at wattmeter 1 in amps
Displacement angle between voltage and current in degrees (0–360)
Line voltage V13 measured at wattmeter 2 in volts
Line current I3 measured at wattmeter 2 in amps
Results
Three Phase Power—WTotal three-phase power in watts