Setting Notes - Siemens SIPROTEC 7SD80 Manual

Functions
2.3 Breaker Intertrip and Remote Tripping
Figure 2-25 Logic diagram of the intertrip — receiving circuit
Additional Options
Since the signals for remote tripping can be set to just generate an indication, any other desired signals can be
transmitted 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.
2.3.2

Setting Notes

General
The intertrip function for tripping caused by the differential protection can be activated (YES) or deactivated (NO)
at address 1301 85 DT: SEND.
To ensure that the faulted line is cleared, the intertrip function must be activated. In some applications, e.g. a
single feed, it may be desirable to switch off the feeding end only. In such exceptional cases, the intertrip func-
tion is not needed.
Intertrip / Remote Tripping
The activated intertrip function starts automatically when the differential protection trips at only one end.
If the relevant binary inputs are allocated and activated by an external source, the intertrip signal is transmitted
as well. In this case, the signal to be transmitted can be delayed with address 1303 85 DT: TD-BI. This delay
stabilizes the originating signal against dynamic interferences which may possibly occur on the control cabling.
Address 1304 85 DT:T-PROL BI is used to extend a signal after it has been effectively injected from an ex-
ternal source.
The reaction of a device when receiving an intertrip/remote tripping signal is set in address 1302 85 DT:
RECEIVE. If it is desired to cause tripping, set the value Trip. If the received signal, however, is supposed to
cause an alarm only, Alarm only must be set if this indication is to be further processed externally.
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SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011