The present paper comprises an experimental investigation into the prediction of the critical flashover voltage of polluted insulators energized with AC voltage using a multi-channel photo-multiplier (MCP) and high speed camera to observe the behavior of ac arc on electrolytic surface.
This complex problem has motivated an important number of studies including field observation, laboratory investigation of the pollution surface, measurement of critical flashover voltage on polluted insulating surface and finally mathematical modeling and fundamental studies of arc propagation on polluted surface [1-8].
These results can be used to improve a new mathematical model for predicting the flashover voltage of polluted insulators.
10, during a half -wave of alternating re-ignitions, the flashover voltage (called the re-ignition voltage) decreases with the increase of the instantaneous current from zero and reaches a value (the arc voltage) corresponding to the peak value of the current
In order to validate the mathematical model calculated and experiment results of flashover voltage are plotted in Fig12.
In this study, the fundamental behaviour of partial arcs on NaCl electrolytic surface under AC voltage was investigated with the aid of high--speed frame camera and M.C.P in order to predict the flashover voltage of polluted insulators.