Title :
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
Abstract :
When the short-time electric strength (Ed) of polymers is determined in accordance with IEC 243, breakdown is usually caused by surface discharges. Unless there are gross isolated defects, Ed is more dependent on the thickness d than on the area of the samples. Ed 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, Ed 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;
Conference_Titel :
Electrical Insulation, 1996., Conference Record of the 1996 IEEE International Symposium on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-3531-7
DOI :
10.1109/ELINSL.1996.549386
