Figure 373: Operation logic of instantaneous high stage
Direct inter-trip
Direct inter-trip is used to ensure the simultaneous opening of the circuit breakers
at both ends of the protected line when a fault is detected. Both start and operate
signals are sent to the remote end via communication. The direct-intertripping
of the line differential protection is included into LNPLDF. The OPERATE output
combines the operate signals from both stages, local and remote, so that it can be
used for the direct inter-trip signal locally.
Protection functions
1MRS759142 F
662 REX640
Technical Manual
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