Title :
The key role of surface conductivity in the early ageing period of epoxy based insulators
Author :
Duréault, V. ; Gosse, B. ; Gatellet, J. ; Boileau, F.
Author_Institution :
LEMD, CNRS, Grenoble, France
Abstract :
Presents experimental diagnostic tools to correlate surface electrical property evolution to surface chemical modifications during ageing. The authors demonstrated that the surface conduction increase during UV irradiation was due to the transformation of the initial ethers and esters in acids and alcohol photo-oxidation products which are 10 times more hydrophilic. It is the hydrophilic power that is responsible for the high sensitivity to the relative humidity
Keywords :
ageing; epoxy insulation; humidity; insulation testing; polymer structure; radiation effects; surface conductivity; surface structure; UV irradiation; acids; alcohol photo-oxidation products; diagnostic tools; early ageing period; epoxy based insulators; esters; ethers; hydrophilic power; relative humidity; surface chemical modifications; surface conduction increase; surface conductivity; surface electrical properties; Aging; Conducting materials; Conductivity; Dielectrics and electrical insulation; Electrostatic measurements; Humidity; Microscopy; Pollution measurement; Surface discharges; Voltage;
Conference_Titel :
Conduction and Breakdown in Solid Dielectrics, 1995. ICSD'95., Proceedings of the 1995 IEEE 5th International Conference on
Conference_Location :
Leicester
Print_ISBN :
0-7803-2040-9
DOI :
10.1109/ICSD.1995.523039
