Title :
Dielectric spectroscopy of epoxy/glass composite materials
Author :
Ajour, M.N. ; Dissado, L.A. ; Fothergill, J.C. ; Norman, P.N.
Author_Institution :
Leicester Univ., UK
Abstract :
Glass fibre reinforced epoxy (GFRE) material is used in pressboard transformers for optical telecommunication systems, typically at voltages between 1 to 2 kV. A programme has been set up to follow the electrical ageing of the GFRE through dielectric and space charge (PEA) measurements. Here we report on the characterisation of the GFRE prior to ageing made by means of linear dielectric spectroscopy. Preliminary results for the aged samples show differences in dielectric response that could be related to debonding at the epoxy-fibre interfaces observed in some failed samples.
Keywords :
ageing; composite insulating materials; delamination; electric breakdown; epoxy insulators; glass fibre reinforced plastics; space charge; 1 to 2 kV; GFRE; breakdown field; composite materials; dielectric response; electrical ageing; glass fibre reinforced epoxy; insulating material; insulation failure; interface debonding; interface voids; limited range interface charge transport; linear dielectric spectroscopy; optical telecommunication systems; pressboard transformers; quasi-DC charge transport process; space charge; Aging; Composite materials; Current measurement; Dielectric materials; Dielectric measurements; Electrochemical impedance spectroscopy; Glass; Optical materials; Space charge; Transformers;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2002 Annual Report Conference on
Print_ISBN :
0-7803-7502-5
DOI :
10.1109/CEIDP.2002.1048828
