ABB Relion 670 Series Applications Manual page 358

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IEC13000016 V2 EN-US

Figure 157: APC - Local remote function block

Switch controller SCSWI

SCSWI may handle and operate on one three-phase device or three one-phase switching

After the selection of an apparatus and before the execution, the switch controller performs

the following checks and actions:

A request initiates to reserve other bays to prevent simultaneous operation.

Actual position inputs for interlocking information are read and evaluated if the operation

is permitted.

The synchrocheck/synchronizing conditions are read and checked, and performs

operation upon positive response.

The blocking conditions are evaluated

The position indications are evaluated according to given command and its requested

direction (open or closed).

The command sequence is supervised regarding the time between:

Select and execute.

Select and until the reservation is granted.

Execute and the final end position of the apparatus.

Execute and valid close conditions from the synchrocheck.

At error the command sequence is cancelled.

In the case when there are three one-phase switches (SXCBR/SXSWI) connected to the switch

controller function, the switch controller will "merge" the position of the three switches to the

1MRK 511 401-UEN Rev. K

IEC13000016-2-en.vsd

Bay control REC670

Application manual

Relion rec670