Surface flashover character of insulator in vacuum under self-magnetic field

The surface flashover character of insulator in vacuum under self-magnetic field is investigated in this paper through the principle of magnetic flashover inhibition (MFI). Considering the calculation of the critical ratio between electric and magnetic field, a coaxial electrode was designed to carry out experiments under three different conditions: the self-magnetic field flashover inhibition, the self-magnetic field flashover acceleration and none magnetic field. The results show that the insulator surface flashover voltage is improved about 15% with the self-magnetic field flashover inhibition and is reduced about 18% with the self-magnetic field flashover enhancement compared with that without magnetic field.