Switch Controller Scswi; Switches Sxcbr/Sxswi - ABB Relion SAM600 Applications Manual

Section 3
Control
IEC17000101 V1 EN-US
Figure 3:
3.1.2

Switch controller SCSWI

In SAM600-IO the SCSWI function is used for creating a representation of the combined
position of the one-phase breakers. Ensure that the control part is not used.
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.
In the case when there are three one-phase switches (SXCBR) connected to the switch
controller function, the switch controller will "merge" the position of the three switches to the
resulting three-phase position. In case of a pole discordance situation, that is, the positions of
the one-phase switches are not equal for a time longer than a settable time; an error signal will
be given.
The switch controller is not dependent on the type of switching device SXCBR or SXSWI. The
switch controller represents the content of the SCSWI logical node (according to IEC 61850)
with mandatory functionality.
3.1.3

Switches SXCBR/SXSWI

Switches are functions used to close and interrupt an ac power circuit under normal
conditions, or to interrupt the circuit under fault, or emergency conditions. The intention with
these functions is to represent the lowest level of a power-switching device with or without
20
APC - Local remote function block
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IEC17000101-1-en.vsd
Switchgear control unit SAM600-IO
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