ABB Relion 670 Series Applications Manual page 364

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The Protection trip logic (SMPPTRC) connects the "trip" outputs of one or more protection

functions to a common "trip" to be transmitted to SXCBR.

The Autorecloser (SMBRREC) consists of the facilities to automatically close a tripped

breaker with respect to a number of configurable conditions.

The logical node Interlocking (SCILO) provides the information to SCSWI whether it is

permitted to operate due to the switchyard topology. The interlocking conditions are

evaluated with separate logic and connected to SCILO .

The Synchrocheck, energizing check, and synchronizing (SESRSYN) calculates and

compares the voltage phasor difference from both sides of an open breaker with

predefined switching conditions (synchrocheck). Also the case that one side is dead

(energizing-check) is included.

The Generic Automatic Process Control function, GAPC, handles generic commands from

the operator to the system.

The overview of the interaction between these functions is shown in Figure

1MRK 511 401-UEN Rev. K

Bay control REC670

Application manual

Relion rec670