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Power Analyzers
Appendix A
77
hcf
Active Power
Assume I
N
= 0 for 3P3W3M
Fundamental
Active Power
Reactive Power
s = +1 when inductive ； s = -1 when capacitive
Fundamental
Reactive Power
Apparent Power
Fundamental
Apparent Power
Power Factor
Measurement
Function
Calculation Formula
hcf I
2
Hk
k2=
13
1
I
N
----
=
Pui⋅=
P
Σ
u
A
i
A
⋅ u
B
i
B
u
C
i
C
⋅+⋅+=
P
H01
U
r
1()I
r
1() U
j
1()I
j
1()+=
P
ΣH01
P
AH01
P
BH01
P
CH01
++=
QsS
2
P
2
–=
Q
H01
U
j
1()I
r
1() U
r
1()I
j
1()+=
SU
rms
I
rms
⋅=
S
Σ
U
A
I
A
⋅ U
B
I
B
U
C
I
C
⋅+⋅+=
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