Water trees conversion in field-aged XLPE

Author

Pélissou, S. ; Amyot, N.

Author_Institution

Hydro-Quebect, Varennes, Que., Canada

fYear

1993

fDate

17-20 Oct 1993

Firstpage

718

Lastpage

725

Abstract

Different field-aged XLPE (cross-linked polyethylene) samples having opposite characteristics have been investigated. Studies of water tree growth and AC breakdown, and an examination of samples peeled-off from a 6-year field-aged cable an (HQ3) and laboratory aged have been carried out. The results obtained confirm the results obtained with cable HQ3 did not differ much in comparison with previous results on cable HQ4. The lower water or microcavity content, and the greater impurity concentrations and water tree density of cable HQ3 did not help to obtain water tree convertion into electrical trees. However, it is confirmed that laboratory and field water trees behave much more as dielectrics or are poorly conductive, and that laboratory accelerated aging conditions are not necessarily representative of what happens in the field

Keywords

XLPE insulation; ageing; electric breakdown; power cable insulation; trees (electrical); AC breakdown; HQ3; HQ4; dielectrics; electrical trees; field-aged XLPE; field-aged cable; impurity concentrations; laboratory aged; microcavity content; poorly conducting materials; water trees conversion; Aging; Cable insulation; Impurities; Laboratories; Performance evaluation; Rough surfaces; Testing; Trees - insulation; Voltage; Water pollution;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1993. Annual Report., Conference on

Conference_Location

Pocono Manor, PA

Print_ISBN

0-7803-0966-9

Type

conf

DOI

10.1109/CEIDP.1993.378888

Filename

378888