Title :
The degradation properties in the corona charged epoxy composites by TSC measurement
Author :
Kim, J.S. ; Lee, S.K. ; Choi, W.S. ; Park, G.H. ; Lee, J.U.
Author_Institution :
Dept. of Electr. Eng., Kwangwoon Univ., Seoul, South Korea
Abstract :
Corona degradation phenomena of epoxy composites to be used for transformers were studied. A formation of corona electrets was first observed by applying high voltages to five different kinds of specimens for a given mixing rate. Thermally stimulated currents (TSC) were measured in a temperature range of -160~200(°C). Carrier behaviour and its origin in epoxy composites was examined. Various effects of corona degradation on epoxy composites were also discussed
Keywords :
composite insulating materials; corona; electrets; electric current measurement; epoxy insulation; insulation testing; power transformer insulation; power transformer testing; thermally stimulated currents; 160 to 200 C; carrier behaviour; corona charged epoxy composites; corona degradation; corona electrets; degradation properties; epoxy composites; thermally stimulated currents measurement; Composite materials; Corona; Current measurement; Dielectrics and electrical insulation; Electrets; Electric variables measurement; Temperature distribution; Temperature measurement; Thermal degradation; Transformers;
Conference_Titel :
Electrical Insulation, 1996., Conference Record of the 1996 IEEE International Symposium on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-3531-7
DOI :
10.1109/ELINSL.1996.549410
