Measurement Of Reactive Ac+Dc Power - AEMC 405 User Manual

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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
Quadrant 2: Reactive power Q
Quadrant 3: Reactive power Q
Quadrant 4: Reactive power Q
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 5 to
Range (2) (4) 9999 var
Specified 1 to 100% of the
Measurement measurement
Range range
Accuracy (3) 1000A
(7) ± (2% R +10cts)
1000 to 1500A
± (2.5% R +10cts)
Resolution 1 var
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.
GlobalTestSupply
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sign +
sign +
sign -
sign –
10.00 to 100.0 to
99.99 kvar 999.9 kvar
0 to 100% of the measurement range
1000A
± (2% R +3cts)
1000 to 1500A
± (2.5% R +3cts)
10 var 100 var
43
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1000 to
1500 kvar
(1)
1 kvar
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