Hioki PQ3198, Инструкция по эксплуатации

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13.8 Calculation Formula
237
10
13
Cha
p
ter 13 Spe
cificatio
ns
Current zero-phase component Izero [A]
The fundamental RMS current (phase current) from harmonic 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 harmonic 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 harmonic 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 PQ3198A961-03