Conference paper
Partial discharge patterns and surface deterioration in voids in filled and unfilled epoxy
Results are presented from analyses of pulses from partial discharges (PDs) in single spherical voids in filled and unfilled epoxy plastic and related to the observed surface deterioration. The filler types used were dolomite, alumina, and silica. Long-time aging tests including pulse phase/height analyses were performed over a period of 2400 h and showed very characteristic discharge patterns for each material combination.
A unique behavior with regard to changes of pulse repetition rate and maximum apparent charge was observed for PD in alumina- and silica-filled epoxy. The void surfaces were investigated by scanning electron microscopy for voids exposed to PD as well as voids without discharges. Different kinds of surface deterioration were found.
An attempt was made to establish a relationship between aging phenomena as exhibited by void surface changes and discharge patterns
| Language: | English |
|---|---|
| Year: | 1992 |
| Pages: | 354-358 |
| Proceedings: | 1992 IEEE International Symposium on Electrical Insulation |
| ISBN: | 078030649X , 078030649x and 9780780306493 |
| ISSN: | 1089084x and 01642006 |
| Types: | Conference paper |
| DOI: | 10.1109/ELINSL.1992.246977 |
| ORCIDs: | Holbøll, Joachim |
2400 h Aging Materials testing Partial discharges Pattern analysis Performance analysis Performance evaluation Phase change materials Plastics Silicon compounds Surface discharges ageing alumina-filled epoxy changes of pulse repetition rate composite insulating materials dolomite-filled epoxy filled epoxy plastic filled polymers insulation testing long-time aging tests maximum apparent charge organic insulating materials partial discharge patterns partial discharges plastics pulse phase/height analyses scanning electron microscope examination of materials scanning electron microscopy silica-filled epoxy single spherical voids surface deterioration surface structure unfilled epoxy voids (solid)
