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35
UMG 512-PRO
7.7.2
Auxiliary input
Measurement in a three-phase 4-conductor
network with a symmetrical load.
Measurement of voltage between N and PE.
Measurement of the current on the neutral con-
ductor.
Measurement in a three-phase 3-conductor
network with a symmetrical load.
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
INFORMATION
If the main measurement is connected to a
three-phase 3-conductor network, the auxiliary
measurement can no longer be used as a mea-
surement input.
INFORMATION
To determine the frequency for a measurement
with the auxiliary measurement, a voltage must
be connected to the main measurement.
INFORMATION
Measured voltages and currents must originate
from the same network.
Summary of Contents for UMG 512-Pro
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