ABB Relion 670 Series Applications Manual page 312

Section 12
Control
• 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 synchronism check.
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 resulting three-phase
position. In case of a pole discrepancy 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.
12.3.5 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 short circuit breaking capability, for
example, circuit breakers, disconnectors, grounding switches etc.
The purpose of these functions is to provide the actual status of positions and to perform the control
operations, that is, pass all the commands to the primary apparatus via output boards and to supervise
the switching operation and position.
Switches have the following functionalities:
• Local/Remote switch intended for the switchyard
• Block/deblock for open/close command respectively
• Update block/deblock of position indication
• Substitution of position indication
• Supervision timer that the primary device starts moving after a command
• Supervision of allowed time for intermediate position
• Definition of pulse duration for open/close command respectively
The realizations of these functions are done with SXCBR representing a circuit breaker and with SXSWI
representing a circuit switch that is, a disconnector or an grounding switch.
Circuit breaker (SXCBR) can be realized either as three one-phase switches or as one three-phase
switch.
The content of this function is represented by the IEC 61850 definitions for the logical nodes Circuit
breaker (SXCBR) and Circuit switch (SXSWI) with mandatory functionality.
12.3.6 Proxy for signals from switching device via GOOSE XLNPROXY
The purpose of the proxy for signals from switching device via GOOSE (XLNPROXY) is to give the same
internal representation of the position status and control response for a switch modeled in a breaker IED
as if represented by a SXCBR or SXSWI function.
The command response functionality is dependent on the connection of the execution information, XIN,
from the SCSWI function controlling the represented switch. Otherwise, the function only reflects the
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