Standard Interlocking (hard-coded)
The following fixed checks are programmed for each switchgear with the standard interlocking function.
These can be individually enabled or disabled via parameters:
•
Switching Status Check (set = actual): The switching command is rejected, and an error indication is
displayed if the circuit breaker is already in the set position. If this check is enabled, then it applies both
for interlocked as well as noninterlocked switching.
•
System Interlocking: To check the power system interlocking, a local command is transmitted to the
central unit with Switching Authority = LOCAL. A switching device that is subject to system interlocking
cannot be switched by DIGSI.
•
Bay Interlocking: Logic combinations deposited in the device using CFC are scanned and taken into
consideration for interlocked switching.
•
Blocked by Protection: A CLOSE-command is rejected as soon as one of the protective functions of the
device establishes a fault case. The OPEN-command, in contrast, can always be executed.
•
Double Operation: parallel switching operations are interlocked against one another; while one
command is processed, a second cannot be carried out.
•
Switching Authority LOCAL: A switch command from local control (command with command source
LOCAL) is only allowed if local control is admissible for the device (via key switch or configuration).
•
Switching authority DIGSI: Switching commands that are issued locally or remotely via DIGSI (command
with command source DIGSI) are only allowed if remote control is admissible for the device (by key
switch or configuration. If a DIGSI-computer logs in at the device, it leaves a Virtual Device Number (VD).
Only commands with this VD (when Switching Authority = REMOTE) will be accepted by the device.
Remote switching commands will be rejected.
•
Switching Authority REMOTE: A remote control command (command with command source REMOTE) is
only allowed if remote control is admissible for the device (by key switch or configuration).
Functions
2.15 Command Processing
SIPROTEC 4, 7VE61 and 7VE63, Manual 135
C53000-G1176-C163-3, Edition 10.2017
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