The operate and start signals are used to provide a LED indication on the LHMI
and they are also connected to the disturbance recorder.
GUID-63612F53-F1C1-48E1-B940-DA878C64479A V1 EN
Figure 12: Negative-sequence overvoltage protection
3.2.6.13 Circuit-breaker failure protection CCBRBRF
The function is activated by the common operate command from the protection
functions. The breaker failure function issues a backup trip command to adjacent
circuit breakers in case the main circuit breaker fails to trip for the protected
component. The backup trip is connected at binary output PSM PO5.
A failure of a circuit breaker is detected by measuring the current or by detecting
the remaining trip signal. Function also provides retrip. Retrip is used along with
the main trip, and is activated before the backup trip signal is generated in case the
main breaker fails to open. Retrip is used to increase the operational reliability of
the circuit breaker.
1MRS756785 A Section 3
REM630 variants
REM630 35
Application Manual
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