Consecutive observations of the relationship between eroded contact surfaces and motion of breaking arc at each breaking operation

Author

Sekikawa, Junya ; Kubono, Takayoshi

Author_Institution

Dept. of Electr. & Electron. Eng., Shizuoka Univ., Hamamatsu, Japan

fYear

2005

fDate

26-28 Sept. 2005

Firstpage

335

Lastpage

339

Abstract

Contact surfaces and the motion of breaking arc are observed in dc 42V/10A resistive circuit for Ag electrical contacts. Cathode and anode surfaces are observed consecutively with a microscope after each breaking operation. The motion of breaking arc between electrical contacts is also observed from two directions using a high-speed camera and mirrors. As a result, some kinds of different films and eroded regions on the electrical contacts are distinguished. The film and eroded regions on the contact surfaces are generated at different stages of the breaking arc. The range of traces on the cathode surface is determined by the moving range of the cathode spot in the middle stage of the arc duration.

Keywords

anodes; arcs (electric); cathodes; electrical contacts; 10 A; 42 V; Ag; anode surfaces; arc duration; breaking arc; cathode surfaces; eroded contact surfaces; high-speed camera; mirrors; resistive circuit; silver electrical contacts; Anodes; Cameras; Cathodes; Circuits; Contacts; Microscopy; Mirrors; Resistors; Surface morphology; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Contacts, 2005. Proceedings of the Fifty-First IEEE Holm Conference on

Print_ISBN

0-7803-9113-6

Type

conf

DOI

10.1109/HOLM.2005.1518266

Filename

1518266