janitza UMG 604-PRO, User Manual And Technical Data, Page: 26 / 87

UMG 604-PRO
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6. 5. 3 Supporting measurement, input V4
L3
L2
L1
I
4
S1 S2
3w 1m
L4 N
N
L3
L2
L1
I
4
S1 S2
4w 1m
L4 N
N
PE
I
4
S1 S2
2w 1n
L4 N
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.
C C
NOTE!
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.
C C
NOTE!
For measurement with the supporting
measurement (V4), a voltage must be
connected to the baseline measurement
for frequency determination.
C C
NOTE!
Measured voltages and measured
currents must derive from the same
network.