Elimination of surface leader and increase in flashover strength by use of hollow insulators

The study of gaseous discharges leads one to the surface streamer channel. If the propagation of the generated streamer could be interrupted by some method, the surface leader would be eliminated. To achieve high reliability of HV insulation, a method is established for elimination of negative leaders, even when the streamers appear. A hollow insulator is designed to interrupt the streamer´s propagation. Surface insulation abilities are studied using the hollow insulator. The elimination of negative surface leaders and increase in flashover voltage under AC voltage in air are reported