The effect of thickness and area on the electric strength of thin dielectric films

Author

Yilmaz, Güneg ; Kalenderli, Ozcan

Author_Institution

R&D Dept., Turk Siemens Kablo ve Elektrik Sanayii, Bursa, Turkey

Volume

2

fYear

1996

fDate

16-19 Jun 1996

Firstpage

478

Abstract

When the short-time electric strength (E_d) of polymers is determined in accordance with IEC 243, breakdown is usually caused by surface discharges. Unless there are gross isolated defects, E_d is more dependent on the thickness d than on the area of the samples. E_d is affected by the permittivity and electric strength of the surrounding medium or the immersion medium. In this paper, the AC electric breakdown strength of thin polyester films as a function of sample thickness in air and oil was investigated. When d<0.2 mm, E_d is usually higher when samples are tested in oil than in air

Keywords

electric breakdown; electric strength; insulation testing; organic insulating materials; permittivity; polymer films; surface discharges; AC electric breakdown strength; film area; film thickness; immersion medium; permittivity; polyester films; short-term electric strength; surface discharges; surrounding medium; thin dielectric films; Dielectric films; Electric breakdown; Electrodes; Optical fiber cables; Permittivity; Petroleum; Polyethylene; Polymer films; Power transformer insulation; Surface discharges;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation, 1996., Conference Record of the 1996 IEEE International Symposium on

Conference_Location

Montreal, Que.

ISSN

1089-084X

Print_ISBN

0-7803-3531-7

Type

conf

DOI

10.1109/ELINSL.1996.549386

Filename

549386