
KBR multimess D9-PQ
20144 EDEBD
A0228-5023-1_EN
87
Measurement data – measurement methods
Distortion reactive power - D
The distortion reactive powers are calculated from the voltage and the associa-
ted distortion currents:
Power Factor PF
In electrical engineering the power factor or active power factor is calculated
as the ratio of real power P to the apparent power S. The power factor can be
between 0 and 1.
The ration is expressed in the following equation:
Power Factor PF: * = IPI / S
Apparent Power - S
In the setup of the multimess D9-PQ two variants of the power calculation
are adjustable
Simplified power calculation
2
2
Q
P
S
+
=
Power calculation according DIN40110 part 2
Conductor apparent power 4-wire system:
Lrms
LNrms
L
I
U
S
⋅
=
Conductor apparent power 3-wire system:
Lrms
rms
L
L
I
U
S
⋅
=
0
∑
∞
=
⋅
=
2
2
I
U
D
ν
ν
50
P
50
S
S
Q
D
50
Q