Title :
Interfacial breakdown in cable joints
Author :
Fournier, D. ; Dang, C. ; Paquin, L.
Author_Institution :
Inst. de Recherche, Hydro-Quebec, Varennes, Que., Canada
Abstract :
Electrical breakdown at the interface of two dielectric surfaces is a complex phenomenon and is one of the major causes of failure for cable accessories. The dielectric strength of an interface increases with interfacial pressure and is substantially improved by the presence of electrical insulating greases. In order to better understand this phenomenon, interfacial breakdown experiments were carried out on interfaces found in cable joints. Measurements of breakdown voltage, interfacial pressure and grease conductivity were made to provide a comprehensive set of data for the investigation. This paper describes the experimental approach and discusses the preliminary results of the investigation on breakdown voltages found in new and field-aged cable splices
Keywords :
ageing; cable insulation; dielectric measurement; electric breakdown; electrical conductivity measurement; insulation testing; pressure measurement; voltage measurement; ageing; breakdown voltage; cable accessories; cable joints; dielectric strength; dielectric surfaces; electrical insulating greases; grease conductivity; interfacial breakdown; interfacial breakdown experiments; interfacial pressure; Aging; Breakdown voltage; Conductivity measurement; Dielectric breakdown; Dielectric measurements; Dielectrics and electrical insulation; Electric breakdown; Electrodes; Power cables; Testing;
Conference_Titel :
Electrical Insulation, 1994., Conference Record of the 1994 IEEE International Symposium on
Conference_Location :
Pittsburgh, PA
Print_ISBN :
0-7803-1942-7
DOI :
10.1109/ELINSL.1994.401422
