ABB Relion 650 Series Applications Manual page 138

Section 10
Control
The mid position of apparatuses can be suppressed at SCSWI by setting the
(SXCBR/SXSWI) to an appropriate value.
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.
Switch (SXCBR/SXSWI)
The Switch is a function 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 this function 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 this function 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.
The Switch has this functionality:
• 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 realization of this function is performed with SXCBR representing a circuit breaker and with
SXSWI representing a circuit switch that is, a disconnector or an grounding 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.
Reservation function (SELGGIO)
The purpose of the reservation function is to grant permission to operate only one device at a
time in a group, like a bay or a station, thereby preventing double operation.
For interlocking evaluation in a substation, the position information from switching devices, such
as circuit breakers, disconnectors and grounding switches can be required from the same bay or
from several other bays. When information is needed from other bays, it is exchanged over the
serial station bus between the distributed IEDs. The problem that arises, even at a high speed of
communication, is a time interval during which the information about the position of the
switching devices are uncertain. The interlocking function uses this information for evaluation,
which means that also the interlocking conditions will be uncertain.
To ensure that the interlocking information is correct at the time of operation, a reservation
method is available in the IEDs. With this reservation method the reserved signal can be used for
evaluation of permission to select and operate the apparatus.
This functionality is realized over the station bus by means of the function block SELGGIO.
The SELECTED output signal from the respective SCSWI function block in the own bay is
connected to the inputs of the SELGGIO function block. The output signal RESERVED from
SELGGIO is connected to the input RES_EXT of the SCSWI function block. If the bay is not currently
reserved, the SELGGIO output signal RESERVED is FALSE. Selection for operation on the SCSWI
block is now possible. Once any SCSWI block is selected, and if its output SELECTED is connected
132
© Copyright 2013 ABB. All rights reserved
1MRK 505 287-UUS B
tIntermediate at
M16602-3 v4
GUID-1D1FEE28-75D6-43A4-830B-638D3970513E v2
Busbar protection REB650
Application manual