5–8 PQM POWER QUALITY METER – INSTRUCTION MANUAL
A1 METERING CHAPTER 5: MONITORING
Ia PHASOR: A phasor representation for the magnitude and angle of Ia is displayed here. Ia
is used as a reference for all other Phasor angles only when there is no voltage present at
the PQM voltage inputs, otherwise, Va is used as the reference.
Ib PHASOR: A phasor representation for the magnitude and angle of Ib is displayed here. Ib
uses the angle of Va as a reference point. If there is no voltage at the PQM voltage inputs,
Ia is used as the reference. Ib is not displayed when the PQM is configured for SINGLE
PHASE DIRECT connection.
Ic PHASOR: A phasor representation for the magnitude and angle of Ic is displayed here. Ic
is uses the angle of Va as a reference point. If there is no voltage at the PQM voltage inputs,
Ia is used as the reference. Ic is not displayed when the PQM is configured for SINGLE
PHASE DIRECT connection.
Courtesy of NationalSwitchgear.com
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