YOKOGAWA CW500, Getting Started Manual, Page: 80 / 87

57
IM CW500-02EN
Total harmonic current distortion THDAF [%]
Display digits 4 digits
Display range
0.0% to 100.0%
Equation
( )
1
100
50
2
2
c
ck
c
A
A
THDAF
k
×
=
∑
=
c: measurement channel
THDAF
1 ,
THDAF
2 ,
THDAF
3 ,
THDAF
4
A: harmonic current
k: harmonic order
Total harmonic voltage distortion THDVR [%]
Display digits 4 digits
Display range 0.0% to 100.0%
Equation
( )
( ) ∑
∑
=
=
×
=
50
1
2
50
2
2
100
k
k
ck
ck
c
A
A
THDAR
c: measurement channel
V: harmonic voltage
k: harmonic order
1P2W-1 to 4
THDVR
1
1P3W-1, 2
THDVR
1 ,
THDVR
2
3P3W-1, 2
Line voltage THDVR
12 ,
THDVR
32
3P3W3A
Line voltage THDVR
12 ,
THDVR
23 ,
THDVR
31
3P4W
THDVR
1 ,
THDVR
2 ,
THDVR
3
Total harmonic current distortion THDAR [%]
Display digits 4 digits
Display range 0.0% to 100.0%
Equation
( )
( )
∑
∑
=
=
×
=
50
1
2
50
2
2
100
k
k
ck
ck
c
A
A
THDAR
c: measurement channel
THDAR1 , THDAR2 ,
THDAR3 , THDAR4
A: harmonic current
k: harmonic order
Specifications