Research on intermediate-frequency vacuum arc recovery characteristics of curved contact

The modern aircraft adopt 360Hz-800Hz frequency conversion power system, and the frequency change has a great impact on interruption. In this paper, the dielectric recovery characteristics of curved contact in at intermediate-frequency vacuum arc are analyzed. According to the feature of intermediate-frequency current, a new type of post-current measurement device is invented. The influence of current level variation on the dielectric recovery characteristics is analyzed by using a vacuum interrupter with CuCr25 curved contact with a diameter of 30mm.