Final breakdown in field-aged XLPE

Author

Pélissou, Serge ; Noirhomme, Bernard

Author_Institution

Hydro-Quebec IREQ, Varennes, Que., Canada

fYear

1992

fDate

22-25 Jun 1992

Firstpage

353

Lastpage

357

Abstract

Water tree growth in field-aged cross-linked polyethylene (XLPE) was investigated. The tests were performed on 600-μm-thick ribbons peeled off from a field-aged 28-kV cable. Water tree growth in the samples saturated at around 70% of sample thickness after 12000 hours of aging, probably due to ion consumption. Ion concentration of the electrolyte solution influenced water tree growth. No correlation was found between the sample location in the insulation and water tree length. AC breakdown strength decreased with aging time and ion concentration. Under the present conditions water trees behave as dielectrics. No electrical tree was observed even with water needle samples

Keywords

ageing; cable insulation; electric breakdown of solids; organic insulating materials; polymers; power cables; 12000 h; 28 kV; AC breakdown strength; aging; electrolyte solution; field-aged XLPE; ion consumption; power cables; tree growth; water trees; Aging; Cable insulation; Dielectrics and electrical insulation; Electric breakdown; Laboratories; Needles; Performance evaluation; Polyethylene; Testing; Trees - insulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Conduction and Breakdown in Solid Dielectrics, 1992., Proceedings of the 4th International Conference on

Conference_Location

Sestri Levante

Print_ISBN

0-7803-0129-3

Type

conf

DOI

10.1109/ICSD.1992.224926

Filename

224926