24
UMG 96RM-PN
Current direction
The current direction can be individually corrected via
the existing serial interfaces or on the device for each
phase.
If incorrectly connected, a subsequent re-connection of
the current transformer is not required.
With residual current monitoring (RCM) there is no
directional sensitivity of the residual currents on
the network or load sides (not directionally sensitive).
c
Current transformer connections!
The secondary connection of the current
transformer must be short circuited on this
before the current feed to the UMG 96RM-
PN is disconnected!
If a test switch, which automatically short-
circuits the secondary wires of the current
transformer, is available then it is sufficient
to set this to the "Test" position insofar
as the short-circuiting device has been
checked beforehand.
c
Open-circuit current transformers!
High voltage spikes that are dangerous to
touch can occur on current transformers
that are driven with open-circuit secondary
windings!
With "safe open-circuit current trans-
formers" the winding insulation is rated
such that the current transformer can be
driven open. However, even these current
transformers are dangerous to touch when
they are driven open-circuit.
c
Attention!
Residual current monitoring is performed
using the terminals I5 and I6 (cf. page
30). There is
no directional sensitivity of
the residual currents of the network or load
sides (not directionally sensitive).
c
Earthing of current transformers!
If a connection is provided for the earthing
of secondary windings, then it must be
connected to the earth.
Summary of Contents for UMG 96 RM-PN
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Page 128: ...128 UMG 96RM PN...
