Title :
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
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;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1994., IEEE 1994 Annual Report., Conference on
Conference_Location :
Arlington, TX
Print_ISBN :
0-7803-1950-8
DOI :
10.1109/CEIDP.1994.592080
