24
UMG 511
Auxiliary measurement, input 4
Fig. measurement using a three-phase 4 con-
ductor network with symmetrical load.
Fig. measurement in a three-phase 3 conduc-
tor network with symmetrical load.
Fig. measurement of the voltage between N
and PE. Measurement of the current in the
neutral wire.
For measurement with the auxil-
iary measurement (V4), a voltage
must be connected to the baseline
measurement for frequency deter-
mination.
m
In case of a three wire main measu-
rement (input V1-V3), the auxiliary
measurement (input V4) cannot be
used as measuring input.
m
L1
L2
L3
N
L4 N
4w 1m
I4
S1 S2
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