• 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.
15.2.1.3 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 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
Section 15 1MRK 502 071-UEN -
Control
502 Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
Application manual
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