Influence of Ablation on Differential Arc Resistance
2017 ◽
Vol 4
(2)
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pp. 145-148
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Keyword(s):
Dry Air
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The influence of ablation on the du/di behavior of an arc in a model gas circuit breaker was examined. Specifically the transition from a state without ablation in the nozzle towards states with ablation was of interest, since prior work indicated that for high currents the voltage becomes constant or du/di gets even positive if ablation is present. Measurements with different blow pressures and rectangular DC currents of varying amplitude were compared, using PMMA-nozzles and dry air as blowing gas. Ablation was measured by weighing the nozzle, scanning the cross section, and using a coordinate measuring machine. The results agreed well, and confirmed that higher pressure shifts the du/di curve towards more favorable values.
2016 ◽
Vol 2016.69
(0)
◽
pp. 13-14
2006 ◽
Vol 48
◽
pp. 122-127
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Keyword(s):
1973 ◽
Vol 31
◽
pp. 698-699
Keyword(s):
1972 ◽
Vol 30
◽
pp. 568-569
Keyword(s):
Keyword(s):