ABB REB670 Series, Applications Manual

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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.
12.3.4 Switches SXCBR/SXSWI
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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, earthing
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 earthing 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.
12.3.5 Proxy for signals from switching device via GOOSE XLNPROXY
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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 current status of the switch, such as blocking, selection, position,
operating capability and operation counter.
Since different switches are represented differently on IEC 61850, the data that is mandatory
to model in IEC 61850 is mandatory inputs and the other useful data for the command and
status following is optional. To make it easy to choose which data to use for the XLNPROXY
function, their usage is controlled by the connection of each data’s signal input and valid input.
These connections are usually from the GOOSEXLNRCV function (see Figure 141 and Figure
142 ).
Section 12 1MRK 505 370-UEN D
Control
290 Busbar protection REB670
Application manual