Configuration
5-27
7SJ63 Manual
C53000-G1140-C120-1
Figure 5-29
Dialog Box - Object Properties for a Command with Feedback (Example: Double
Command with Single Trip Outputs and Double Close Outputs, CF_D12)
The conditional checks that should be conducted before execution of a switching com-
mand can also be defined:
•
System Interlocking (Substation controller): in preparation, implemented as of Ver-
sion 4.2.
•
Zone controlled (Bay Specific Interlocking): Logic functions created with CFC in the
relay are processed for interlocked switching.
•
Device status (Open/Closed; scheduled/actual): The switching command is ignored
and a corresponding indication is issued if the switching device is already in the de-
sired position. If this check is activated, switching direction control occurs not only
for interlocked, but also for non interlocked switching.
•
Blocked by protection: CLOSE–switching command for switchgear is blocked as
soon as one of the protective functions or elements in the relay has picked up.
OPEN commands, in contrast, can always be executed. Please be aware, activa-
tion of thermal overload protection or sensitive ground fault detection can create
and maintain a fault condition indication, and can therefore lead to the blocking of
CLOSE commands. If the blocking by protection facility is disabled consider that a
blocked restart of a tripped motor feeder is overridden. In this case the manual re-
close of the motor feeder has to be interlocked by different means, i.e. CFC. One
method would be to use the bay specific interlocking in CFC.
•
Double operation: Parallel switching operations are blocked with respect to each
other; while one switching operation is being conducted, a second one may not be
performed.
•
Switching Authority – Local commands: A local control switching command is only
allowed if local control is enabled on the relay (via a setting).
•
Switching Authority - Remote commands: A remote control switching command is
only allowed if remote control is enabled on the relay (via a setting).
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