2.4 Breaker Intertrip and Remote Tripping
107
7SD5 Manual
C53000-G1176-C169-1
In order to ensure that the transmission signal reaches all devices in objects with more
than two ends, it is also looped through the protection data interface.
Receive Circuit On the receiving end the signal can lead to a trip. Alternatively it can also cause an
alarm only. In this way it is possible to determine for each end of the protected object
whether the received signal is to trip at this particular end or not.
Figure 2-26 shows the logic diagram. If the received signal is supposed to cause a trip,
it will be forwarded to the tripping logic. The tripping logic of the entire device (see also
Section 2.23.1) ensures, if necessary, that the conditions for single-pole tripping are
fulfilled (e.g. single-pole tripping permissible, auto-reclosure function ready).
Figure 2-26 Logic diagram of the intertrip — receiving circuit
Ancillary Functions Since the signals for remote tripping can be set to cause only an alarm, any other
desired signals can be transmitted in this way as well. After the binary input(s) have
been activated, the signals which are set to cause an alarm at the receiving end are
transmitted. These alarms can in turn execute any desired actions at the receiving
end. It should be noted that for the transmission of remote alarms and remote com-
mands a further 24 transmission channels and, in addition, 4 fast transmission chan-
nels are optionally available (see also Section 2.12).
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