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This paper describes the measurement of the surface temperature of copper electrodes submitted to an electric arc in a non stationary regime in air. The measurement is made with the help of an infrared camera. In the first part, the method to obtain a temperature distribution on the contact surface 40 μs after the forced and very fast arc extinction is described. In a second part of the paper we present...
A contact process between large-scale integration (LSI) pads and test probes at low contact force is a key to developing a probe card with smaller pitch and higher pin count. In this paper, we report on the characteristics of low-force contact methods on Cu electrodes. One is the fritting process, in which an electric breakdown is utilized to break the surface oxide, and the other is the heating treatment...
We have researched the factors of high insulation recovery characteristics after current interruption in vacuum circuit breakers (VCB). VCB have high insulation recovery characteristics because of diffusing metal vapor to surroundings by high diffusion effect of vacuum. However, when the arc current exceeded the certain value, electrode erosion was remarkable and insulation recovery characteristics...
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