1-Out-of-n Check (Double-Activation Blocking)
The double-activation blocking prevents 2 commands from being executed in the device simultaneously. You
can set the device-internal check for each switching device as a parameter in the Control function block.
The default setting is Yes, that is, double-activation blocking is active (see the figure below).
[scdoppel-260912-01.tif, 1, en_US]
Figure 8-44 Activating the Double-Activation Blocking
With SIPROTEC 5, it is also possible to achieve multibay double-activation blocking.
In this case, send the signal not selected to other devices for analysis using IEC 61850-GOOSE. This signal
is available under Position in every Circuit-breaker or Disconnector function block in the switching device
function groups (see figure below).
[scnotselected-090315_de, 1, en_US]
Figure 8-45
Signal
Not selected
in the Circuit-Breaker Function Block
The signal is then queried in the CFC interlocking conditions for the associated switching devices and is used
to generate the release signal (for example, >Release on).
Blocking by Protection Function
•
Default setting (_:107) Check blk. by protection = yes
In devices with protection and control functions, Siemens recommends that no switching commands can be
issued while protection functions have picked up.
Control Functions
8.3 Control Functionality
1120 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
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