43
Notes (2), (3) and (4) of the previous § apply
Note 5 In single-phase, the sign of the reactive power is determined by the
phase lead or lag between the V and I signs, while in balanced three-
phase, it is determined by the calculation on the samples.
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
9999 var
10.00 to
99.99 kvar
100.0 to
999.9 kvar
1000 to
1500 kvar
(1)
Specified
Measurement
Range
1 to 100% of the
measurement
range
0 to 100% of the measurement range
Accuracy (3)
(7)
1000A
± (2% R +10cts)
1000 to 1500A
± (2.5% R +10cts)
1000A
± (2% R +3cts)
1000 to 1500A
± (2.5% R +3cts)
Resolution
1 var
10 var
100 var
1 kvar
Note (1) - Display of OL above 1500 kvar in single-phase (1000V x 1500A)
- Bandwidth in AC in voltage = 3 kHz, in current = 2 kHz
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.
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