Phasors - GE 489 Instruction Manual

8 489PC SOFTWARE
The 489PC software can be used to view the phasor diagram of three phase currents and voltages. The phasors are for:
• Phase Voltages A, B, and C
• Phase Currents A, B, and C
• Impedance Z
Loss
1. With 489PC running and communications established, open the Metering Data window by selecting the Actual >
Metering Data menu item then clicking the Phasors tab. The phasor diagram and the values of the voltage phasors are
displayed.
Longer arrows are the voltage phasors, shorter arrows are the current phasors.
NOTE
2. Va and Ia are the references (i.e. zero degree phase). The lagging angle is clockwise.
VOLTAGE LEVEL
Displays the value and
the angle of the voltage

phasors

CURRENT LEVEL
Displays the value and angle
of the current phasors
GE Power Management
CURRENT PHASOR
Short arrow
Figure 8–7: PHASORS
489 Generator Management Relay
8.3 USING 489PC
8.3.9 PHASORS
VOLTAGE PHASOR
Long arrow
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