21
UMG 511
Fig. measurement in a three-phase 4 conductor
network with asymmetrical load.
Fig. measurement using 2 current converters in
a three-phase 3 conductor network with symme-
trical load.
L1
L2
L3
N
L
1
L
2
L
3
N
4w 3m
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
N
L
1
L
2
L
3
N
4w 3m
hv
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
N
L
1
L
2
L
3
N
4w 2i
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
N
L
1
L
2
L
3
N
4w 2m
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
N
L
1
L
2
L
3
N
4w 2u
hv
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
N
L
1
L
2
L
3
N
4w 2u
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
N
L
1
L
2
L
3
N
4w 3m
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
N
L
1
L
2
L
3
N
4w 3m
hv
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
N
L
1
L
2
L
3
N
4w 2i
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
N
L
1
L
2
L
3
N
4w 2m
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
N
L
1
L
2
L
3
N
4w 2u
hv
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
N
L
1
L
2
L
3
N
4w 2u
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2