Partial discharge characteristics in aged EPR, 15 kV rated cables

Author

Ahmed, Nezar ; Srinivas, Nagu

Author_Institution

Detroit Edison Co., MI, USA

fYear

1998

fDate

25-28 Oct 1998

Firstpage

512

Abstract

Several 15-kV rated, EPR cables subjected to aging processes were examined for partial discharge (PD). These cables were subjected to different load cycling while fully immersed in water to obtain different aging conditions. PD initiated in these cables then was measured at rated and elevated voltages. Correlation then was examined between the PD signature and the type of insulation defect. This achieved by comparing the PD frequency, magnitude and phase angles of different insulation defects. Correlation between the PD level and the ac-breakdown voltage of these cables also was presented in this paper. The same investigations also were repeated on several cables removed from service after 15-20 years of service

Keywords

ageing; electric breakdown; ethylene-propylene rubber; partial discharges; power cable insulation; 15 kV; AC breakdown; EPR; aging; insulation defect; load cycling; partial discharge; power cable; water immersion; Aging; Cables; Conductors; Frequency; Insulation; Paramagnetic resonance; Partial discharge measurement; Partial discharges; Testing; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1998. Annual Report. Conference on

Conference_Location

Atlanta, GA

Print_ISBN

0-7803-5035-9

Type

conf

DOI

10.1109/CEIDP.1998.732948

Filename

732948