23
UMG 511
Fig. measurement in a single-phase 3 conductor
network. I3 and U3 are not calculated and set to
zero.
Fig. measurement in a three-phase 3 conductor
network with asymmetrical load.
Fig. measurement in a three-phase 3 conductor
network with asymmetrical load.
Fig. measurement of a phase in a three-phase 4
conductor network.
L1
N
L
1
L
2
L
3
N
2w 1m
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
L
1
L
2
L
3
N
3w 3m
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
L
1
L
2
L
3
N
3w 2i
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
L
1
L
2
L
3
N
3w 2m
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
L
1
L
2
L
3
N
3w 2m
hv
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
L
1
L
2
L
3
N
3w 2u
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
L
1
L
2
L
3
N
3w 2u
hv
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L
1
L
2
L
3
N
2w 2m
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L1
N
L
1
L
2
L
3
N
2w 1m
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
L
1
L
2
L
3
N
3w 3m
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
L
1
L
2
L
3
N
3w 2i
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
L
1
L
2
L
3
N
3w 2m
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
L
1
L
2
L
3
N
3w 2m
hv
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
L
1
L
2
L
3
N
3w 2u
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
L
1
L
2
L
3
N
3w 2u
hv
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L
1
L
2
L
3
N
2w 2m
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L1
N
L
1
L
2
L
3
N
2w 1m
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
L
1
L
2
L
3
N
3w 3m
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
L
1
L
2
L
3
N
3w 2i
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
L
1
L
2
L
3
N
3w 2m
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
L
1
L
2
L
3
N
3w 2m
hv
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
L
1
L
2
L
3
N
3w 2u
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
L
1
L
2
L
3
N
3w 2u
hv
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L
1
L
2
L
3
N
2w 2m
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L1
N
L
1
L
2
L
3
N
2w 1m
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
L
1
L
2
L
3
N
3w 3m
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
L
1
L
2
L
3
N
3w 2i
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
L
1
L
2
L
3
N
3w 2m
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
L
1
L
2
L
3
N
3w 2m
hv
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
L
1
L
2
L
3
N
3w 2u
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2
L3
L
1
L
2
L
3
N
3w 2u
hv
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L
1
L
2
L
3
N
2w 2m
I
1
I
2
I
3
S1 S2 S1 S2 S1 S2
L1
L2