Siemens 7SC80 Manual page 387

•
Device 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 works
whether interlocking, e.g. zone controlled, is activated or deactivated.) This condition is checked in both
interlocked and non-interlocked status modes.
•
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.
•
Zone Controlled / Bay Interlocking: Logic links in the device which were created via CFC are interrogated
and considered during interlocked switching.
•
Protection blocking: Switch-ON commands are rejected in the case of interlocked switches as soon as one
of the protection functions of the unit has initiated a trip log. However, trip commands can always be
executed.
•
Double Operation Block: Parallel switching operations are interlocked against one another; while one
command is processed, a second one cannot be carried out.
•
Switching Authority LOCAL: A control command from the user interface of the device (command with
command source LOCAL) is only allowed if the Key Switch (for devices without key switch via configura-
tion) is set to LOCAL.
•
Switching authority DIGSI: Switching commands that are issued locally or remotely via DIGSI (command
with source DIGSI) are only allowed if remote control is enabled at the device (by configuration). When a
DIGSI computer logs on to the device, it enters its Virtual Device Number (VD). Only commands with this
VD (when switching authority = REMOTE) are accepted by the device. Remote switching commands are
rejected.
•
Switching authority REMOTE: A remote switching command (command with source REMOTE) is only
allowed if remote control is enabled at the device (by configuration).
SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017
Functions
2.27 Breaker Control
387