janitza UMG 104, Operating Manual And Technical Data

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UMG 104
Auxiliary measurement, input 4
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 using a three-phase 4
conductor network with symmetrical load.
Fig. measurement in a three-phase 3
conductor network with symmetrical load.
Fig. measurement of the voltage between N
and PE. Measurement of the current in the
neutral wire.
In case of a three wire main measu-
rement (input V1-V3), the auxiliary
measurement (input V4) cannot be
used as measuring input.
c
For measurement with the auxiliary
measurement (V4), a voltage must be
connected to the baseline measure-
ment for frequency determination.
c