Tuesday 8
A. Arcs
Chair: M. Benilov, G.R. Jones - Each talk is 10'+2' duration
› 11:30 - 11:45 (15min)
› Cabannes
Investigations on the Spatial Arc Resistance Distribution of an Axially Blown Switching Arc
Michael Weuffel  1, *@  , Paul Gregor Nikolic  1@  , Armin Schnettler  1@  
1 : Institute for High Voltage Technology - RWTH Aachen University  (RWTH Aachen - IFHT)  -  Website
Schinkelstrasse 2 D-52056 Aachen -  Germany
* : Corresponding author

The determination of the spatial arc resistance distribution is one option to gain deeper insight into the physical processes during current interruption in high voltage circuit breakers. A measurement system capable of measuring this spatial arc resistance distribution by means of capacitive field probes is applied to a circuit breaker model equipped with a Laval nozzle geometry which has previously been investigated using optical measuring methods. According to these investigations, which serve as reference case, the spatial arc resistance distribution is determined for varying current steepness values. Comparing the results a general agreement between the determined arc resistance distributions and the results from the reference case is observed. The functionality of the measurement system is confirmed for both successful and non-successful switching operations. Uncertainties and differences in the obtained arc resistance distributions are discussed.


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