Stressing Factors Impact on Surface Erosion of Epoxy Resin Exposed to Electrical Discharges

Inhalt:
This paper investigates the influence of electrical as well as environmental stresses on surface erosion of polymeric materials used in high voltage insulation like epoxy resin. The analysed electrical factors are test voltage magnitude TVM and frequency TVF; whereas environmental factors are temperature and humidity of discharge medium. Suitable electrode arrangement is applied in order to produce measurable erosion and guarantee the control of the analysed factors of influence. Also, the influence of UV stresses induced from electrical discharge is investigated in terms of surface erosion. From the obtained results, a dependence of erosion severity on the stressing factors can be concluded. A strong correlation also exists between discharge parameters and surface damage.