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To identify the influence of current interruption on the insulation strength of vacuum interrupters (VIs), the V-t characteristics of VIs were measured from nano seconds to several micro seconds range before and after current interruption. The breakdown voltage increased after the current interruption for VIs of Cu-Cr contacts. The field emission current of contacts were also measured before and after...
Because of the contact material's evaporation and ejection of some metal particles out of the contact gap during the flow of the vacuum arc, the contact surface may exhibit some erosion after each operation of vacuum circuit breakers. In this paper, the insulation properties were investigated for vacuum interrupters with the rated voltage of about 10-kV operating voltage after short-circuit current...
Because of the contact material's evaporation and ejection of some metal particles out of the contact gap during the flow of the vacuum arc, the contact surface may exhibit some erosion after each operation of vacuum circuit breakers. In this study, the insulation properties were investigated for vacuum interrupters with the rated voltage about 10 kV operating voltage after short circuit current interruption...
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