Arc tracking power balance: Method for determining fusion and vaporization power
Résumé
The energy balance for fault arcs in aeronautic conditions has been studied for copper and aluminium cables. A method based on high speed observation of melted droplets ejected from the electrodes has been developed for lost mass determination. This allows estimating the power needed for metal fusion and by considering the power transferred to the electrodes, the part responsible for vaporization can be estimated. This leads to more accurate determination of the power balance. In addition, this method allows study of the cables erosion as a function of time. Comparison between aluminium and copper cables has been made for various wire diameters. Results show that while the total power transferred to electrodes is lower in the case of copper, the part available for vaporization is greater. As expected, less metal is vaporized for larger cables at the same power. The droplets ejection shows high fluctuations over time but erosion becomes lower and more stable once the two cables are cut.
Origine | Fichiers produits par l'(les) auteur(s) |
---|