Switches (Sxcbr/Sxswi) - ABB REB670 Applications Manual
Busbar protection 2.1 ansi, relion 670 series
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Also See for REB670:
- Applications manual (554 pages) ,
- Commissioning manual (196 pages) ,
- Operator's manual (116 pages)
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1MRK 505 337-UUS -
12.3.1.3
Application manual
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 synchronism check.
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 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.
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 function are done with SXCBR representing a circuit breaker and
with SXSWI representing a circuit switch that is, a disconnector or an grounding switch.
Section 12
Control
329
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