24
Fourth-quadrant active energy
Positive capacitive active power
Second-quadrant active energy
Negative capacitive active power
Active energy output
Third-quadrant active energy
Negative inductive active power
First-quadrant reactive energy
Positive inductive reactive power
Reactive energy
input
Second-quadrant reactive energy
Positive capacitive reactive power
Third-quadrant reactive energy
Negative inductive reactive power
Reactive energy
output
Fourth-quadrant reactive energy
Negative capacitive reactive
power
3.5 Harmonic parameters (optional)
PMAC735 provides optional measurement of complete 31
st
harmonic for voltage and current as
well as their total harmonic content (THD) and K factor of current.
The data of harmonics are given according to the percentage of fundamental harmonics and have
one digit after the decimal point. That is to say, when the value of the fundamental harmonic is
fixed at 1000, it is 100.0% of the effective value of the fundamental harmonic; others are by
analogy.
THD refers to the total of higher harmonics except fundamental harmonics, and it is calculated
according to the following formula:
n
i
i
i
X
THD
2
2
The formula for calculating K factor is as follows:
n
i
i
n
i
i
i
i
K
X
X
i
1
2
1
2
)
(