Switch Controller (Scswi) - ABB Relion REC670 Applications Manual

Section 13
Control
IEC13000016 V2 EN-US
Figure 106: APC - Local remote function block
13.3.1.2

Switch controller (SCSWI)

SCSWI may handle and operate on one three-phase device or three one-phase switching
devices.
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.
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IEC13000016-2-en.vsd
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Application manual