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The Development of No-Mercury Type Card Relay for Improving the Reliability of Electrical Facilities  

Ahn, J.K. (한국전력공사 영등포지점)
Chang, J.W. (한국전력공사 송변전건설팀)
Kim, J.K. (한국전력공사 광주전력관리처)
Yang, J.W. (한국전력공사 광주전력관리처)
Lee, S.I. (한국전력공사 광주전력관리처)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.56, no.4, 2007 , pp. 641-644 More about this Journal
Abstract
The electro-mechanical mercury relay is used as an auxiliary relay of power facility because it is superior to operating time and no-bounce. So the KEPCO had used the mercury relay for operating HVDC(High Voltage Direct Current) system. But it has many problems with facility operation by occurrence of mercury evaporation, held contact point and malfunction according to long term use, furthermore it is forbidden to produce for fear of environmental pollution in 2002. This paper presents the no-mercury relay development, comparison test and application.
Keywords
mercury relay; no-mercury relay; malfunction; held contact point;
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  • Reference
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