Measurement Of Reactive Ac+Dc Power; Calculation Of The Power Factor (Pf) - AEMC 407 User Manual

4.2.18 Measurement of Reactive AC+DC Power

Measurement
Range (2) (4)
Specified
Measurement
Range
Accuracy (3)
(7)
Resolution
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 in AC and AC+DC):



4.2.19 Calculation of the Power Factor (PF)

Measurement Range (1)
Specified Measurement
Range
Accuracy (2)
Resolution
Note (1) If one of the terms in the calculation of the power factor is displayed
as "OL", or forced to zero, the display of the power factor is an
indeterminate value "----".
Note (2) In balanced three-phases, with deformed signals (THD and
harmonics), uncertainties are guaranteed since Ф > 30°. Additional
errors are following, depending of THD:
Add +1% for 10% < THD < 20%
Add +3% for 20% < THD < 30%
Add +5% for 30% < THD < 40%
NOTE: The PF is always positive
Specific characteristics in MAX/MIN mode (from 10Hz to 1kHz):


5 to
9999 var
1 to 100% of the
measurement range
1000A
± (2% R +10cts)
1000 to 2000A
± (2.5% R +10cts)
1 var
Accuracy: add 1% R to the values in the table above.
Capture time: approximately 100ms
measurement range
Accuracy: add 1% R to the values in the table above.
Capture time: approximately 100ms.
10.00 to
99.99 kvar
0 to 100% of the measurement range
10 var
0.00 to +1.00
0 to 50% of the
± (3% R +3cts)
74
100.0 to
999.9 kvar
1000A
± (2% R +3cts)
1000 to 2000A
± (2.5% R +3cts)
100 var
50 to 100% of the
measurement range
± (2% R +3cts)
0.01
1000 to
1500 kvar
(1)
1 kvar