Functions
2.4 Breaker Intertrip and Remote Tripping
SIPROTEC, 7SD610, Manual
C53000-G1176-C145-6, Release date 02.2011
78
2.4 Breaker Intertrip and Remote Tripping
7SD610 allows to transmit a tripping 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.
The reaction when receiving such a command can be set individually for each device.
Commands are transmitted separately for each phase, so that a simultaneous single-pole auto-reclosure is
always possible, provided that devices and circuit breakers are designed for single-pole tripping.
2.4.1 Function Description
Transmission Circuit
The transmission signal can originate from two different sources (Figure 2-23). If the parameter I-TRIP SEND
is set to YES, each tripping command of the differential protection is routed immediately to the transmission
function „ITrp.sen. L1“ to "...L3“ (intertrip) and transmitted via the communication link at the protection data in-
terface.
Furthermore, it is possible to trigger the transmission function via binary inputs (remote tripping). This can be
done either separately for each phase via the input functions „>Intertrip L1“, „>Intertrip L2“, and
„>Intertrip L3“, or for all phases together (3-pole) via the binary input function „>Intertrip 3pol“.
The transmission signal can be delayed with T-ITRIP BI and prolonged with T-ITRIP PROL BI.
Figure 2-23 Logic diagram of the intertrip — transmission circuit
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