Influence of Ablation on Differential Arc Resistance

Autor:	Christian Franck, Lorenz Bort, Vincent Freiermuth
Rok vydání:	2017
Předmět:	Work (thermodynamics) Materials science Physics and Astronomy (miscellaneous) medicine.medical_treatment Nozzle axially blown arc Mechanics Condensed Matter Physics Ablation ablation passive oscillation Arc (geometry) Cross section (physics) Amplitude medicine HVDC CB MRTS Circuit breaker Voltage
Zdroj:	Plasma Physics and Technology Journal, 4 (2)
ISSN:	2336-2634 2336-2626
DOI:	10.14311/ppt.2017.2.145
Popis:	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. Plasma Physics and Technology Journal, 4 (2) ISSN:2336-2634
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::00f8345b590b38cc8e34fc23480029dd https://doi.org/10.14311/ppt.2017.2.145 Zobrazit plný text záznamu