Effects of electrode surface conditions on discharge characteristics [of arresters]

Author

Otsubo, M. ; Yamaguchi, T. ; Matsune, T. ; Honda, C. ; Nieda, H. ; Uejima, M. ; Hammam, M.S.A.A.

Author_Institution

Fac. of Eng., Miyazaki Univ., Japan

fYear

1994

fDate

23-26 Oct 1994

Firstpage

883

Lastpage

888

Abstract

The performance characteristics of gap type arresters used in 6kV distribution systems were observed to change with repetitive operations at a large impulse current. It is considered that the change of the performance is due to both the contamination of a spacer holding the gap and the physical and chemical changes of surface conditions of the gap electrodes. The effects of the electrode surface conditions on the arrester performance are still not clear. In this study, the relationship between the change of the 50% flashover voltage of an arrester and the physical and chemical changes of electrode surface versus the number of operation times N is examined. The results obtained with an X-ray photoelectron spectroscope (XPS) and an electron probe micro-analyser are used

Keywords

electrodes; 6 kV; X-ray photoelectron spectroscope; chemical changes; discharge characteristics; distribution systems; electrode surface conditions; electron probe micro-analyser; flashover voltage; gap type arresters; impulse current; physical changes; Arresters; Chemicals; Electrodes; Electrons; Flashover; Probes; Spectroscopy; Surface contamination; Surface discharges; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1994., IEEE 1994 Annual Report., Conference on

Conference_Location

Arlington, TX

Print_ISBN

0-7803-1950-8

Type

conf

DOI

10.1109/CEIDP.1994.592080

Filename

592080