Breaker Intertrip and Remote Tripping
The 7SD80 device allows transmitting a trip command created by the local differential protection to the other
end of the protected object (intertripping). Likewise, any desired command of another internal protection
function or of an external protection, monitoring or control equipment can be transmitted for remote tripping.
Functional Description
Transmit Circuit
The transmission signal can originate from two different sources (Figure 2-24). If the parameter 85 DT:
SEND is set to YES, each tripping command of the differential protection is routed immediately to the trans-
mission function „ITrp.sen. A“ to "...C“ (intertrip) and transmitted via the protection data interfaces and
communication links.
The send function can be triggered via binary input
>85 DT 3pol
(remote tripping). The transmission signal
can be delayed with 85 DT: TD-BI and prolonged with 85 DT: TD-BI.
[lo-mitnahme-sendekreis-20101108, 1, en_US]
Figure 2-24 Logic diagram of the intertrip — Transmission circuit
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 partic-
ular end or not.
If the received signal is to cause the trip, it will be forwarded to the tripping logic of the device.
2.3
2.3.1
Functions
2.3 Breaker Intertrip and Remote Tripping
SIPROTEC 4, 7SD80, Manual 69
E50417-G1100-C474-A2, Edition 02.2018
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