Study of the Dynamics of Insulating Paper Electrical Breakdown

The dynamics of electric breakdown of insulating paper with different technical characteristics is investigated. In addition to the value of the breakdown voltage the following parameters: the rate of change of the total energy released in the discharge gap during one half-cycle of industrial frequency voltage, changing the voltage of the occurrence of electrical discharges in each half-cycle in the process of the breakdown development, as well as the statistical characteristics of breakdown were measured. The voltampere characteristics of the discharge within one half-cycle at different stages of development of electric breakdown are presented. The difference between the dynamics of electric breakdown of dry insulating paper and paper-impregnated insulation is demonstrated. On the basis of the obtained data, an assumption about the possibility of determining some parameters of the structure of the insulating paper is annonced.