Examination of the breakdown site in new and aged polyethylene insulated cables

Author

Naybour, R.D.

Author_Institution

Electr. Council Res. Centre, Chester, UK

fYear

1989

fDate

3-6 Jul 1989

Firstpage

61

Lastpage

65

Abstract

Discharges have been monitored and located in short lengths of cable tested to breakdown. These tests have been used to detect prebreakdown deterioration. The discharge location system is novel and has enabled limited energy breakdown sites to be located. Not all the breakdowns were initiated at the region of the inner screen boundary. In short-term tests to breakdown on new and dry aged cables at a maximum field of 30 MV/m there was no gradual increase in the discharge level above the detection limit of 1 pC. It appears possible that ageing with applied voltage at ambient temperature can improve the breakdown strength

Keywords

ageing; cable insulation; discharges (electric); electric breakdown of solids; insulation testing; organic insulating materials; polymers; aged polyethylene insulated cables; ageing; breakdown site; breakdown strength; discharge location system; dry aged cables; electric discharges; inner screen boundary; prebreakdown deterioration detection; short-term tests; Aging; Cable insulation; Cables; Electric breakdown; Fault location; Monitoring; Polyethylene; Pulse shaping methods; Testing; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Conduction and Breakdown in Solid Dielectrics, 1989., Proceedings of the 3rd International Conference on

Conference_Location

Trondheim

Type

conf

DOI

10.1109/ICSD.1989.69162

Filename

69162