Thermally stimulated current measurements on polymeric cable insulation The diagnostic aspect

Author

Gubanski, S. ; Bulinski, A. ; Bamji, S.S.

Author_Institution

R. Inst. of Technol., Stockholm, Sweden

fYear

1993

fDate

17-20 Oct 1993

Firstpage

732

Lastpage

738

Abstract

The authors describe results of TSDC (thermally stimulated discharge current) measurements performed on XLPE (cross-linked polyethylene) cable insulation subjected to water tree aging in the laboratory. The measurements show consistent changes of the TSDC spectra with the aging time for both polarized and nonpolarized specimens. The changes observed, which include the reduction of the relaxation temperature with aging time, are more evident after the insulation is subjected to DC polarization stress. It is concluded that the observed changes of the TSDC spectra may prove to be an effective diagnostic tool for assessing the operating conditions of electrical insulation

Keywords

XLPE insulation; ageing; dielectric polarisation; insulation testing; power cable insulation; thermally stimulated currents; trees (electrical); DC polarization stress; TSDC; XLPE; aging time; cross-linked polyethylene; diagnostic tool; electrical insulation; nonpolarized specimens; operating conditions; polarised specimens; polymeric cable insulation; relaxation temperature; thermally stimulated discharge current; water tree aging; Aging; Cable insulation; Current measurement; Performance evaluation; Polarization; Polyethylene; Polymers; Temperature; Time measurement; Trees - insulation;

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.1993.378886

Filename

378886