The length of the lines in the phasor diagram represent the relative magnitude of the voltages with respect to the other phase voltages, and the currents with respect to the other phase currents. All angles are measured with respect to the Va/V1 phase. The Va/V1 phasor is fixed to the right-hand horizontal axis (positive x-axis). Positive angles are measured counterclockwise.
Numeric values are provided for the magnitude and relative angle for each voltage and current phase.
Phasor information can be used to troubleshoot incorrect connections on the meter’s voltage and current inputs (for example, switched phase wiring or polarity errors), if you know how the phasors should be oriented for your power system.