Siemens SIPROTEC 7RW80 Manual page 132

Functions
2.13 Breaker Control
Figure 2-37
Standard Interlocking (default)
The standard interlockings contain the following fixed programmed tests for each switching device, which can
be individually enabled or disabled using parameters:
• 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-in-
terlocked 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.
• Blocking by Protection: Switch-ON commands are rejected with interlocked switches, as soon as one of the
protection functions of the unit has opened a fault case. The OPEN-command, in contrast, can always be
executed.
• Double Operation Block: 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 source LOCAL) is only
allowed if local control is enabled at the device (by configuration).
• 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). If a DIGSI-
PC communicates with the device, it deposits here its 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 switch command (command with source REMOTE) is only allowed
if remote control is enabled at the device (by configuration).
Control Logic using CFC
For the bay interlocking a control logic can be structured via the CFC. Via specific release conditions the infor-
mation "released" or "bay interlocked" are available (e.g. object "52 Close" and "52 Open" with the data values:
ON / OFF).
Switching Authority
The interlocking condition "Switching authority" serves for determining the switching authority. It enables the
user to select the authorized command source. The following switching authority ranges are defined in the fol-
lowing priority sequence:
• LOCAL
• DIGSI
• REMOTE
132
Example of an operational annunciation for switching circuit breaker 52 (Q0)
SIPROTEC, 7RW80, Manual
C53000-G1140-C233-1, Release date 10.2010