Tuesday 8
A. Arcs
Chair: M. Benilov, G.R. Jones - Each talk is 10'+2' duration
› 11:20 - 11:30 (10min)
› Cabannes
Investigations on Switching Arcs in CO2 by Time-Resolved Optical Emission Spectroscopy and CFD Simulations
Paul Gregor Nikolic  1@  , Daniel Eichhoff  1@  , Ruslan Kozakov  2@  , Dirk Uhrlandt  2@  , Armin Schnettler  1@  
1 : Institute for High Voltage Technology - RWTH Aachen University  (RWTH Aachen - IFHT)  -  Website
Schinkelstrasse 2 D-52056 Aachen -  Germany
2 : Leibniz-Institute for Plasma Science and Technology e.V. (INP Greifswald), 17489, Greifswald

Despite intensive research work during the last decades, the interruption process in high-voltage circuit breakers is still not fully understood. Especially with regard to the adaption of today's switching technologies for SF6-substitutes as e.g. CO2 (carbon dioxide) an improved understanding of the physical processes during current interruption is required. Here optical emission spectroscopy (OES) offers time-resolved access to physical properties, e.g. temperature and pressure, in the nozzle system. Thus OES measurements are performed by means of a circuit breaker model in this contribution. The obtained arc temperature profiles and temperature characteristics are in good agreement with the results of CFD simulations (computational fluid dynamics).


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