Title :
The composition change of contact material surface [electrical contacts]
Author :
Xixiu, Wu ; Meihua, Di ; Zhenbiao, Li ; Chengyan, Liu
Author_Institution :
Dept. of Electr. Eng., Huazhong Univ. of Sci. & Technol., Wuhan, China
Abstract :
Contact surface composition change definitely affects the performance of electrical contacts, even making the electrodes fail to work. The composition change of contact material surfaces heated respectively by arcing current and Joule energy is studied in this paper and experimental results indicate that the percentage change of metals is influenced by both the energy input to the electrode and the properties of the contact material, such as thermal conductivity, specific heat, density and melting point etc. Two criteria are presented to show the rules of composition change for contacts heated by arcing current and Joule energy respectively.
Keywords :
arcs (electric); electrical contacts; materials properties; surface composition; Joule energy heating; arc current heating; contact material properties; density; electrical contact material surface; electrode energy input; melting point; metals percentage change; specific heat; surface composition change; thermal conductivity; Anodes; Composite materials; Conducting materials; Contacts; Electrodes; Inorganic materials; Materials science and technology; Nickel; Temperature; Tin;
Conference_Titel :
Electrical Contacts, 2003. Proceedings of the Forty-Ninth IEEE Holm Conference on
Print_ISBN :
0-7803-7862-8
DOI :
10.1109/HOLM.2003.1246489
