Study of the Pollution Resistance in Front of the Flashover Discharge on a Disk Model

In this paper the pollution resistance before the foot of the discharge, and the geometrical form of the leakage current lines, during the evolution of the discharge until flashover, is very important for the modelling of this phenomenon on a real insulator, and for the determination of its critical conditions. To study this problems, we have achieves a new model of laboratory. This model looks like a real insulator of electric lines in his shape and also in his pollution. The suggested model is valid to act well as go-between the real insulator and simple laboratory models which have carefully studied. In this paper we present our model with its characteristics and the experimental results of its use for measuring the critical voltage and the pollution resistances between the ground electrode and a static discharge for many discharge positions.