Schneider Electric 4000 Figure 42: Reactive PowerVAR sign convention

63230-300-212 Chapter4—Metering Capa bilities
April 2001 Min/Max Values for Real-time Reading s
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© 2001 Schneider Electric All Rights Reserved
The circuit monitorcan be set to one of two VAR sign conventions, the
standard IEEE or the ALT(CM1). Circuit monitors manufacturedbefore
March 2000default to the ALT VARsign convention.The Series 4000 Circuit
Monitor defaultsto the IEEE VAR sign convention.Figure 4–2 illustrates the
VARsign conventiondefined by IEEE and the default usedby previous model
circuitm onitors(CM1). For instructions on changing the VAR sign
convention, re fer to “Advanced MeterSetup”on page 34.
Figure 4–2: Reactive Power—VAR sign convention
VARSign Conventions
Real
Power
In
Reactive
Power In
Quadrant
1
Quadrant
2
Quadrant
3Quadrant 4
Reverse Power Flow Normal Power Flow
Real
Power
In
Reactive
Power In
ALT (CM1) VAR Sign Convention IEEE/IEC VAR Sign Convention
(Series 4000 Circuit Monitor Default)
Quadrant
1
Quadrant
2
Quadrant
3Quadrant
4
Reverse Power Flow Normal Power Flow
watts negative (–)
vars negative (–)
power factor leading (+)
watts negative (–)
vars positive (+)
power factor lagging (–)
watts postive (+)
vars positive (+)
power factor leading (+)
watts positive (+)
vars negative (–)
power factor lagging (–)
watts negative (–)
vars positive (+)
power factor leading (+)
watts negative (–)
vars negative (–)
power factor lagging (–)
watts positive (+)
vars negative (–)
power factor leading (+)
watts positive (+)
vars positive (+)
power factor lagging (–)