Logic of the Stage
[lo_stage_arcprotection, 1, en_US]
Figure 6-91
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.
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!
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
6.10 Arc Protection
502 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
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