Ions mobility determinations on polluted HVAC insulators during electric flashover using experimental model

During electric flashover process its difficult to determine the real values of ions mobility, because we did not known the nature of different ions ejected forward the leader of the discharge. Using results of time to flashover measurements against applied voltage which carried out under AC with the experimental set up. In this paper the regression method is used to model accurately the relationship between flashover time and insulators parameters in order to calculate the ions mobility. Moreover the results obtained are discussed. The present study indicates that the different values of ions mobility are a good concordance between this model and those obtained in humid air and water steam.