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Summation current measurement
If the current is measured via two current trans-
formers, the total transformation ratio of the
current transformers must be programmed in
the UMG96S.
Example: Summation current transformer
Each current measurement is taken via a cur-
rent transformer with a transformation ratio of
1000/5A and a current transformer with a trans-
formation ratio of 200/5A. The summation
measurement is performed with a 5+5/5A sum-
mation transformer.
The UMG96S must then be set as follows:
Primary current:
1000A + 200A =
1200A
Secondary current:
5A
Load 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 is optionally measured via a ../5A
or ../1A current transformer. If, in addition to the
UMG96S, the current has to be measured with
a ampere meter, this must be connected in se-
ries with the UMG96S.
In systems with voltages up to 150VAC to
earth, currents up to 5A can also be directly
connected to the UMG96S and measured.
L l
K k
A
l
k
UMG96S
Verbraucher
Consumer
Einspeisung
Supply
Important!
The secondary connections of the current
transformer must be short-circuited to it
first before the current supply leads to the
device are disconnected!
If a testing switch is available, which au-
tomatically short circuits the current
transformer’s secondary leads, it is suffi-
cient to place this in the „test“ position,
provided the short-circuiters have been
tested first.
m
Содержание UMG 96S 24V
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