Effect of aging of breakdown voltage of artificially damaged cable

Author

Hanson, B.A. ; Reynolds, A.B.

Author_Institution

Dept. of Mech., Aerosp. & Nucl. Eng., Virginia Univ., Charlottesville, VA, USA

fYear

1993

fDate

17-20 Oct 1993

Firstpage

787

Lastpage

792

Abstract

The effect of flaws and thermal and radiation aging of flaws on the electrical breakdown of low-voltage cable was studied. AC breakdown voltages of XLPE (cross-linked polyethylene) and EPR (ethylene-propylene rubber) cables were measured for both damaged and undamaged cable. Three types of flaws were studied: scrapes, transverse cuts, and longitudinal cuts. Some cables were radiated-aged up to 1 MGy and others were thermally aged at 130°C for up to 50 days. Results to date indicate little effect of aging on breakdown voltage and a linear decrease in breakdown voltage with decreasing thickness beneath scrapes and transverse cuts below some threshold thickness. Calculated electric field distributions at breakdown indicate that breakdown occurs by partial discharge in pores

Keywords

XLPE insulation; ageing; electric breakdown; ethylene-propylene rubber; partial discharges; power cable insulation; 130 degC; 50 days; AC breakdown voltages; EPR; XLPE; aging; artificially damaged cable; breakdown voltage; cross-linked polyethylene; electric field distributions; electrical breakdown; ethylene-propylene rubber; flaws; longitudinal cuts; low-voltage cable; partial discharge; pores; radiation aging; scrapes; thermal ageing; threshold thickness; transverse cuts; Aging; Breakdown voltage; Cable insulation; Electric breakdown; Paramagnetic resonance; Partial discharges; Power cables; Radiation safety; Safety devices; Voltage measurement;

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.1993.378877

Filename

378877