184
Calculation Formula
13. Harmonic voltage phase angle (Uphase), Harmonic current phase angle (Iphase), Harmonic
power phase angle (Pphase)
Wiring
Item
Single phase
2-wire
1P2W
Single phase
3-wire
1P3W
3-phase 3-wire
3P3W2M
3-phase 3-wire
3P3W3M
3-phase 4-wire
3P4W
Uphase
[deg]=
φ
U
k
φ
U
1k
φ
U
4
k
φ
U
ck
=
−
−
cki
ckr
U
U
1
tan
φ
U
1k
φ
U
2k
φ
U
4
k
φ
U
1k
φ
U
2k
φ
U
3k
φ
U
4
k
φ
U
12k
φ
U
23k
φ
U
31k
φ
U
1k
φ
U
2k
φ
U
3k
φ
U
4
k
During
1PU3W1U
Without
φ
U
2
k
• For 3P3W2M wiring, it is assumed that
U
1
−U
2
+U
3
= 0
• When
U
ckr
=U
cki
=0
,
φ
U
ck
=0°
Iphase [deg]=
φ
I
k
φ
I
1k
φ
I
4
k
φ
I
ck
=
−
−
cki
ckr
I
I
1
tan
φ
I
1k
φ
I
2k
φ
I
4
k
φ
I
1k
φ
I
2k
φ
I
3k
φ
I
4
k
• For 3P3W2M wiring, it is assumed that
I
1
+ I
2
+ I
3
= 0
.
• When
I
ckr
= I
cki
= 0
,
φ
I
ck
= 0°
Pphase[deg]=
φ
P
k
φ
P
1k
φ
P
ck
=
−
ck
ck
P
Q
1
tan
φ
P
1k
φ
P
2k
φ
P
1k
φ
P
2k
φ
P
3k
φ
P
sumk
• When
P
ck
= Q
ck
= 0
,
φ
P
ck
= 0°
.
c
: Measurement channel,
k
: Order of analysis,
r
: Resistance after FFT,
i
: Reactance after FFT
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