Study of Distortion of a Vacuum Arc at a Long-Gap Distance

摘要

Experimental study of the long-gap distance vacuum arc distortion for three typesof axial magnetic field (AMF) contacts, by using high-speed charge coupled device (CCD), ispresented. The arc current was of a half-cycle sine wave with a frequency of 50 Hz, producedby an L-C discharging circuit. The time of appearance and duration of vacuum arc distortionunder three conditions were studied. It was found that the gap distance, current and diameterof the electrode affected the characteristics of vacuum distortion at a long-gap distance. Somecharacteristics of the vacuum arc at a long-gap distance were revealed and the experience anddata for further investigation were provided.