한국전기전자재료학회:학술대회논문집 (Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference)
- 한국전기전자재료학회 2005년도 춘계학술대회 논문집
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- Pages.175-179
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- 2005
배전선로용 폴리머 피뢰기의 모듈 설계/제조 및 성능
Relief Performance of Fault Current and Design/Manufacturing of Polymer Arresters for Power Distribution
- Cho, Han-Goo (KERI) ;
- Yun, Han-Su (KERI) ;
- Jang, Tae-Bong (SAMHYUNG CO. LTD.) ;
- Chie, In-Hyuk (KEPRI)
- 발행 : 2005.05.27
초록
The main objective of this paper is to module design and pressure relief test a new type of polymer gapless surge arrester for power distribution line. Metal oxide surge arrester for most electric power system applications, power distribution line and electric train are now being used extensively to protect overvoltage due to lightning. Surge arresters with porcelain housing must not have explosive breakage of the housing to minimize damage to other equipment when subjected to internal high short circuit current. When breakdown of gapless elements in a surge arrester occurs due to flashover, fault short current flows through the arrester and internal pressure of the arrester rises. The pressure rise can usually be limited by fitting a pressure relief diaphragm and transferring the arc from the inside to the outside of the housing. However, there is possibility of porcelain fragmentation caused by the thermal shock, pressure rise, etc. Non-fragmenting of the housing is the most desired way to prevent damage to other equipment. The pressure change which is occurred by flashover become discharge energy. This discharge energy raises to damage arrester housing and arrester housing is dispersed as small fragment. Therefore, the pressure relief design is requested to obstruct housing dispersion.