Dielectric breakdown of low density polyethylene film subjected to partial discharge in air gap

Author

Nagao, M. ; Nakahara, M. ; Sugio, M. ; Daniel, Mt ; Zainuddin, N. ; Kosaki, M.

Author_Institution

Toyohashi Univ. of Technol., Japan

fYear

1998

fDate

27-30 Sep 1998

Firstpage

425

Lastpage

428

Abstract

Polymeric materials such as polyethylene and polypropylenes are widely used as electrical insulating materials of power cables and capacitors because of their excellent electrical and mechanical properties. Normally, once they are charged, these charges are supposed to maintain for a long time and the possibility of various problems arises, which relate to the static or surface charges. In this paper, we investigated the dielectric breakdown and space charge formation of a low-density polyethylene (LDPE) film caused by partial discharge in air gap. The highest Fb was obtained with the specimen film without a gold evaporated electrode on the needle electrode side. When the gold evaporated electrode was deposited on the surface of the film, the Fb decreased with increased evaporated electrode area. The Fb decreased with relative humidity above 75%

Keywords

electric breakdown; partial discharges; polyethylene insulation; space charge; air gap; dielectric breakdown; evaporated electrode area; low density polyethylene film; partial discharge; relative humidity; space charge formation; Cable insulation; Dielectric breakdown; Dielectric materials; Dielectrics and electrical insulation; Electrodes; Gold; Plastic films; Polyethylene; Polymers; Surface discharges;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulating Materials, 1998. Proceedings of 1998 International Symposium on

Conference_Location

Toyohashi

Print_ISBN

4-88686-050-8

Type

conf

DOI

10.1109/ISEIM.1998.741773

Filename

741773