AEMC 205 - Measurement of Reactive AC+DC Power

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Note (6) - Signs of reactive powers according to the four-quadrant rule (§4.2.12):
Quadrant 1: Reactive power Q sign +
Quadrant 2: Reactive power Q sign +
Quadrant 3: Reactive power Q sign -
Quadrant 4: Reactive power Q sign –
Note (7) With deformed signals (THD and harmonics), uncertainties are
guaranteed since Φ > 30°:
Add +1% for 10%<THD<20%
Add +3% for 20%<THD<30%
Add +5% for 30%<THD<40%
4.2.17 Measurement of Reactive AC+DC Power
Measurement
Range
(2) (4)
5 to
5999 var
6.00 to
59.99 kvar
60.0 to
599.9 kvar
600 to
900 kvar
(1)
Specified
Measurement
Range
1 to 100% of the
measurement
range
0 to 100% of the measurement range
Accuracy
(3) (7)
± (2% R +10cts)
± (2% R +3cts)
Resolution
1 var
10 var
100 var
1 kvar
Note (1) - Display of OL above 900 kvar in single-phase (1000V x 900A)
- Bandwidth in AC in voltage = 3kHz, in current = 3kHz
Notes (2), (3) , (4), (5), (6) and (7) of the previous § apply
Specific characteristics in MAX/MIN mode in power (from 10Hz to 1kHz):
• Accuracy: add 1% R to the values in the table above.
• Capture time: approximately 100ms