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http://dx.doi.org/10.5207/JIEIE.2005.19.3.044

Discharge Luminous Phenomena Caused Between ZnO Surge Arrester Block and Electrodes  

Lee, Bok-Hee (인하대학교 전자전기공학부)
Park, Keon-Young (인하대학교 전자전기공학부)
Kang, Sung-Man (인하대학교 전자전기공학부)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.19, no.3, 2005 , pp. 44-50 More about this Journal
Abstract
This paper deals with the characteristics and reduction methods of the plasma luminosity caused between the ZnO surge arrester block and metal electrodes. In this study, the impulse current generator that can generate $8/20[{\mu}s]$ impulse currents with a peak short-circuit of 10[kA] is designed and fabricated. Plasma luminosity phenomena for fine and used ZnO blocks were observed as a function of the contact states between the ZnO block and electrodes and the polarity of applied impulse voltages. As a result, discharge luminous events are produced near the contact edges between the ZnO block and metal electrodes. The discharge plasma luminosity between the ZnO surge arrester block and low potential electrode is more intensive than that between the ZnO surge arrester block and high potential electrode. Surface flashover of ZnO blocks are mainly caused by plasma generation near the edge of metal electrode. Also, plasma luminosity for the fine ZnO blocks is less than that for the used ZnO blocks. Plasma luminosity at the contact of the ZnO block and ring-type electrode is more intensive than that at the contact of ZnO block and disk electrode. It is desirable to use the disk electrode with the proper contact area to reduce the plasma luminosity caused at the contact point between the ZnO block and electrodes.
Keywords
Zinc oxide(ZnO) surge arrester block; Luminous phenomena; Degradation; Surface flashover; Lightning impulse current;
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