26
UMG 605US
c
c
Short-circuit current transformer con-
nections!
The secondary connections of
the current transformer must be
short-circuited to them first before
the current supply leads to the
UMG605US are disconnected!
If a testing switch is available, which
automatically short circuits the current
transformer's secondary leads, it is
sufficient to place this in the “test”
position, provided the short-circuiters
have been tested first.
Open current transformer!
High hazardous live voltage peaks can
occur at current transformers which
are operated open on the secondary
side!
The winding insulation in “safe open
current transformers” is dimensioned
so that the current transformers can
be operated open. But these current
transformers are also hazardous live
if they are operated open.
Fig. 26.1 Example, current measurement via
additional ammeter.
Ammeter
If you not only want to measure the current
with the UMG605US but with an ammeter
also, the ammeter must be connected in
series to the UMG605US.
UMG
S
2
I
S
1
Einspeisung
Supply
Verbraucher
Consumer
A
(k)S
1
S
2
(l)
P
2
(L)
(K)P
1
Содержание UMG 605US
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