1735
Users Manual
50
IVS ×= apparent power
S
P
PF ==
λ
power factor
222
QPSD −−= distortion power
2
1
2
1
1
cos
QP
P
+
=
ϕ
cosine cosϕ
Note
The distortion power is > zero if the waveform of current is different
from the voltage waveform.
Total Harmonic Distortion
%100
1
)(
40
2
2
×=
∑
=
V
V
THD
h
h
Total Harmonic Distortion
V1 to RMS of the fundamental
Vh to RMS of the h-th harmonic
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