Title :
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
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;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1993. Annual Report., Conference on
Conference_Location :
Pocono Manor, PA
Print_ISBN :
0-7803-0966-9
DOI :
10.1109/CEIDP.1993.378886
