Hioki PQ3198 - Page 242

13.8 Calculation Formula
236
Current zero-phase component Izero [A]
The fundamental RMS current (phase current) from harmo
nic calculations is used for I1, I2, and I3.
At the zero-phase, seq2=0°, seq3=0°
α=I1 phase angle, β=I2 phase angle, γ=I3 phase angle
Current positive-phase component Ipos [A]
The fundamental RMS current (phase current) from harmo
nic calculations is used for I1, I2, and I3.
At the positive-phase, seq2=120°, seq3=240°
α=I1 phase angle, β=I2 phase angle, γ=I3 phase angle
Current negative-phase component Ineg [A]
The fundamental RMS current (phase current) from harmo
nic calculations is used for I1, I2, and I3.
At the negative-phase, seq2=240°, seq3=120°
α=I1 phase angle, β=I2 phase angle, γ=I3 phase angle
Izero
1
3
---
I1 α()cos• I2 β seq2+()cos• I3 ϒ seq3+()cos•++()
2
I1 α()sin• I2 β seq2+()sin• I3 ϒ seq3+()sin•++()
2
+
=
Ipos
1
3
---
I1 α()cos• I2 β seq2+()cos• I3 ϒ seq3+()cos•++()
2
I1 α()sin• I2 β seq2+()sin• I3 ϒ seq3+()sin•++()
2
+
=
Ineg
1
3
---
I1 α()cos• I2 β seq2+()cos• I3 ϒ seq3+()cos•++()
2
I1 α()sin• I2 β seq2+()sin• I3 ϒ seq3+()sin•++()
2
+
=
HIOKI PQ3198A961-02