Title :
A model of the electrical breakdown process due to electrical treeing growth
Author :
Bozzo, R. ; Guastavino, F. ; Tommasini, D.
Author_Institution :
Dept. of Electr. Eng., Genoa Univ., Italy
Abstract :
The authors develop a mathematical model that can describe the electrical breakdown due to electrical treeing growth in point-plane electrode specimens of thermoplastic polymers subjected to AC voltage ramps. The damage due to the tree growth is modeled as a conductive sphere, allowing an easy computation of the geometrical field in front of it. The breakdown voltage VBD, the radius of the sphere Rb, and the electric field on the sphere AEb are related by means of the simple equation VBD(D)=AEb×R b(D), where D is the interelectrode gap. The model has been verified experimentally
Keywords :
electric breakdown of solids; organic insulating materials; polymers; AC voltage ramps; breakdown voltage; conductive sphere; electrical breakdown; electrical treeing growth; interelectrode gap; mathematical model; point-plane electrode; thermoplastic polymers; Breakdown voltage; Dielectric breakdown; Dielectrics and electrical insulation; Electric breakdown; Electrodes; Materials testing; Microscopy; Needles; Shape measurement; Trees - insulation;
Conference_Titel :
Conduction and Breakdown in Solid Dielectrics, 1989., Proceedings of the 3rd International Conference on
Conference_Location :
Trondheim
DOI :
10.1109/ICSD.1989.69231
