GE Multilin PQM - Phasors

CHAPTER 5: MONITORING A1 METERING
PQM POWER QUALITY METER – INSTRUCTION MANUAL 5–7
Van, Vbn, Vcn MAXIMUM: Displays the maximum phase voltage magnitudes and the time
and date of their occurrence. This information is stored in non-volatile memory and is
retained during loss of control power. The
S1 PQM SETUP \ CLEAR DATA \ CLEAR MIN/
MAX VOLTAGE VALUES
setpoint clears these values.
Vab, Vbc, Vca MAXIMUM: Displays the maximum line voltage magnitudes and the time
and date of their occurrence. This information is stored in non-volatile memory and is
retained during loss of control power. The
S1 PQM SETUP \ CLEAR DATA \ CLEAR MIN/
MAX VOLTAGE VALUES
setpoint clears these values.
V U/B MAXIMUM: Displays the maximum voltage unbalance and the time and date of its
measurement. This information is stored in non-volatile memory and is retained during
loss of control power. The value is cleared with the
S1 PQM SETUP \ CLEAR DATA \ CLEAR
MIN/MAX VOLTAGE VALUES
setpoint.
5.2.3 Phasors
FIGURE 5–4: Actual Values Page 1 – Metering/Phasors
Va PHASOR: Displays a phasor representation for the magnitude and angle of Va. Va is
used as a reference for all other phasor angles. If there is no voltage present at the PQM
voltage inputs, then Ia will be used as the reference for all other angles. Va is also used as
the reference when in Simulation Mode.
Vb PHASOR: Displays a phasor representation for the magnitude and angle of Vb. Vb 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. Vb is not displayed when the PQM is configured for the 3 WIRE
DELTA/2 VTs, 4 WIRE WYE/2 VTs, or SINGLE PHASE DIRECT connections.
Vc PHASOR: A phasor representation for the magnitude and angle of Vc is displayed here.
Vc 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. Vc is not displayed when the PQM is configured for
SINGLE PHASE DIRECT connection.
]] ACTUAL VALUES
]] A1 METERING
] PHASORS
]
Va PHASOR
0V 0° LAG
Vb PHASOR
0V 0° LAG
Vc PHASOR
0V 0° LAG
Ia PHASOR
0A 0° LAG
]] ACTUAL VALUES
]] A2 STATUS
ACTUAL
Ib PHASOR
0A 0° LAG
Ic PHASOR
0A 0° LAG
MESSAGE
MESSAGE
MESSAGE
Courtesy of NationalSwitchgear.com