"Life Expectancy of Crosslinked Polyethylene Insulated Cables Rated 15 to 35 kV"

Author

Bahder, G. ; Katz, C. ; Eager, S., Jr. ; Leber, E. ; Chalmers, S.M. ; Jones, W.H. ; Mangrum, W.H., Jr.

Author_Institution

Cable Technology Laboratories, Inc.

Issue

4

fYear

1981

fDate

4/1/1981 12:00:00 AM

Firstpage

1581

Lastpage

1590

Abstract

Ever since it was demonstrated that installed extruded dielectric underground distribution cables lose significant dielectric strength due to formation of electrochemical trees in the insulation users have sought a means to determine the remaining useful service life. Subjecting miniature and full size crosslinked polyethylene (XLPE) insulated cables to accelerated aging tests and comparing the results to aging of I5kV cables removed from service the authors show how the remaining service life of installed cables can be estimated from dissipation factor measurements. This non-destructive test is made utilizing the available system voltage and would require the cable to be disconnected only several hours from service. The method devised to estimate service life is applicable to both polyethylene (PE) and XLPE insulated cables and its accuracy will be increased as more dissipation factor data is taken on cables now in service.

Keywords

Accelerated aging; Cable insulation; Cables; Dielectric breakdown; Dielectrics and electrical insulation; Life estimation; Life testing; Polyethylene; Size measurement; Trees - insulation;

fLanguage

English

Journal_Title

Power Apparatus and Systems, IEEE Transactions on

Publisher

ieee

ISSN

0018-9510

Type

jour

DOI

10.1109/TPAS.1981.316546

Filename

4110773