Influence of continuous thermal ageing on the properties of XLPE used in medium voltage cables

Author

Boubakeur, A. ; Mecheri, Y. ; Boumerzoug, M.

Author_Institution

Ecole Nat. Polytech., El-Harrach, Algeria

Volume

4

fYear

1999

fDate

6/21/1905 12:00:00 AM

Firstpage

236

Abstract

This paper covers investigation results on electrical and mechanical properties of crosslinked polyethylene (XLPE), used as electrical insulation of medium voltage power cables, under thermal ageing stress. The authors have carried out continuous accelerated thermal ageing of cables at four levels of temperatures ranging from 80°C to 140°C on 18/30 kV cable samples. The measurements include threshold voltage of partial discharges, dielectric loss factor and relative permittivity as a function of ageing time. The mechanical properties are measured before and after the ageing tests. The obtained results show that thermal ageing significantly affects the properties of XLPE

Keywords

XLPE insulation; 18 kV; 30 kV; 80 to 140 C; PD threshold voltage; XLPE MV power cable insulation; accelerated thermal ageing; ageing time; continuous thermal ageing; crosslinked polyethylene; dielectric loss factor; electrical properties; insulation breakdown testing; mechanical properties; partial discharges; relative permittivity;

fLanguage

English

Publisher

iet

Conference_Titel

High Voltage Engineering, 1999. Eleventh International Symposium on (Conf. Publ. No. 467)

Conference_Location

London

ISSN

0537-9989

Print_ISBN

0-85296-719-5

Type

conf

DOI

10.1049/cp:19990836

Filename

821264