Title :
Model for partial breakdown of polymer
Author_Institution :
Wroclaw Polytech., Poland
Abstract :
A model for the breakdown of a polymer subject to a strong electric field that views this phenomenon as the result of monopolar charge injection is presented. The starting assumption is that there is a relationship between breakdown and the onset of negative differential conduction (dj/dE⩽0). This effect can result in a critical electric field and, at a lower field, can increase the current density. It is suggested that the model can describe not only the breakdown process in polymer layers and the needle test but also ageing breakdown, e.g. that induced by partial discharges
Keywords :
ageing; electric breakdown of solids; negative resistance effects; organic insulating materials; partial discharges; polymers; ageing breakdown; critical electric field; current density; monopolar charge injection; needle test; negative differential conduction; partial breakdown model; partial discharges; polymer; Breakdown voltage; Charge measurement; Current measurement; Dielectrics; Electric breakdown; Electrodes; Needles; Polymers; Space charge; Testing;
Conference_Titel :
Conduction and Breakdown in Solid Dielectrics, 1989., Proceedings of the 3rd International Conference on
Conference_Location :
Trondheim
DOI :
10.1109/ICSD.1989.69168
