26
UMG 512
Supporting measurement, input V4
Fig. Measurement in a three-phase 4-conductor
network with symmetric loading.
Fig. Measurement in a three-phase 3-conductor
network with symmetric loading.
Fig. Measurement of the voltage between N and PE.
Measurement of the current in the neutral conductor.
L1
L2
L3
N
L
4
N
4w 1m
I
4
S1 S2
L1
L2
L3
L
4
N
3w 1m
I
4
S1 S2
N
L
4
N
2w 1n
I
4
S1 S2
PE
L1
L2
L3
N
L
4
N
4w 1m
I
4
S1 S2
L1
L2
L3
L
4
N
3w 1m
I
4
S1 S2
N
L
4
N
2w 1n
I
4
S1 S2
PE
L1
L2
L3
N
L
4
N
4w 1m
I
4
S1 S2
L1
L2
L3
L
4
N
3w 1m
I
4
S1 S2
N
L
4
N
2w 1n
I
4
S1 S2
PE
m
If the baseline measurement (inputs
V1-V3) is connected to a three-phase
3-conductor network, the supporting
measurement (input V4) can no longer
be used as a measurement input.
m
For measurement with the supporting
measurement (V4), a voltage must
be connected to the baseline measurement
for frequency determination.
Summary of Contents for UMG 512
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Page 116: ...116 UMG 512 Dimension diagrams Cut out size 138 0 8 x 138 0 8 mm Rear side Patch cable ...
Page 117: ...117 UMG 512 Side view View from below ...
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