Discharge magnitude distribution and discharge luminescence in an electrical treeing (Polarity effects for prediction of tree initiation)

Author

Ehara, Y. ; Matsudo, M. ; Kishida, H. ; Ito, T.

Author_Institution

Musashi Inst. of Technol., Tokyo, Japan

fYear

1992

fDate

7-10 Sep 1992

Firstpage

205

Lastpage

208

Abstract

The authors investigate how to improve the prediction of tree initiation by the polarity effects indicated in the discharge magnitude distributions. This work measures particularly the negative discharge pulses in addition to positive. During sample heating, a steel needle electrode (diameter:1 mm) was inserted into polymethylmethacrylate. The experimental samples consisted of an artificial fine void (length:1.5 mm) with air at 1 atm. The test voltage was AC 50 Hz, 14 kV. The discharge magnitude, the discharge luminescence and the tree configurations were measured and observed until 30 minutes after the tree initiation. The experimental procedure was carried out at room temperature in silicone oil and 30 samples were tested

Keywords

electric breakdown of solids; organic insulating materials; polymers; 1 atm; 1.5 mm; 14 kV; 30 min; 50 Hz; PMMA; artificial fine void; discharge luminescence; discharge magnitude; discharge magnitude distributions; electrical treeing; needle plane geometry; negative discharge pulses; polarity effects; polymethylmethacrylate; room temperature; steel needle electrode; test voltage; tree configurations; tree initiation prediction;

fLanguage

English

Publisher

iet

Conference_Titel

Dielectric Materials, Measurements and Applications, 1992., Sixth International Conference on

Conference_Location

Manchester

Print_ISBN

0-85296-551-6

Type

conf

Filename

186917