Logic of the Stage
[lo_stage_arcprotection, 1, en_US]
Figure 7-198
Logic Diagram of the Stage
TheArc protection function uses a locally connected optical arc sensor or an external trip initiation by other
devices in order to detect arcs.
i
i
NOTE
Install the arc sensors inside the switchgear in such a way that they are not hidden behind other system
components!
Shadowing of the arc sensors must be avoided!
i
i
NOTE
Once an optical sensor has detected an arc, you must replace the affected optical sensor!
Within the Arc protection function, you can use a fast current-flow criterion as an additional release criterion.
The parameters for the current-flow criterion can be found in the General block. For each stage, you can
select individually whether the current-flow criterion must be evaluated as well.
Protection and Automation Functions
7.29 Arc Protection
914
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
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