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Sum current measurement
If the current measurement is carried out via two
current transformers and a sum current trans-
former, the total transformer ratio must be
programmed at UMG96S.
Example: Sum current transformer
A current measurement is carried out via one ct
with a ratio of 1000/5A and one ct with a ratio of
1000/5A. The current measurement is carried
out via a sum current transformer 5+5/5A.
The UMG96S must be programmed as follows:
Primary current: 1000A + 1000A =
2000A
Secondary current:
5A
Verbraucher 1
Consumer 1
Verbraucher 1
Consumer 1
Einspeisung 1
Supply 1
Einspeisung 1
Supply 1
UMG96S
L l
K k
L l
K k
AK AL
K l
k l
BK Bl
Current measurement
The current measurement is carried out via cur-
rent transformers of either ../5A or ../1A. If the
current must be measured by an Amperemeter
additionally, it must be connected in series to the
UMG96S.
In networks with voltage up to 150VAC against
ground, currents up to 5A can be connected di-
rectly to the UMG96S.
L l
K k
A
l
k
UMG96S
Verbraucher
Consumer
Einspeisung
Supply
Attention!
The secondary connections of the current
transformer must be short-circuited, be-
fore the wires that lead to the device are
interrupted!
If a testing switch is available, which short-
circuits the secondaries of the cts auto-
matically, it is sufficient to set it into posi-
tion "check", provided that the short-
circuiters have been checked before.
m
Summary of Contents for UMG 96S
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