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A Study on the Unification of The Grounding System of SeoulMetro due to Ageing  

Min Byung-Hoon (서울메트로)
Kim Gyunl-Sig (서울메트로)
Chung Young-Ki ((주)의제전기설비연구원)
Publication Information
Journal of the Korean Society for Railway / v.9, no.4, 2006 , pp. 394-400 More about this Journal
Abstract
Since Seoulmetro built the first line of electric railway at seoul 1974, the passengers of railway have been increased rapidly, and electric railway requires more electric power for the greater capacity of transport. It is important that we prevent the accidents related with the subway, because all systems of subway are constructed in artificial underground structure. Since the previous versions of the earth system were built to meet the old standards of the electric facility for the lightning, some accidents related with the DC earth fault are causing secondary damages to the electric equipments. So, the old grounding system must be improved, and new standards of grounding system are required. We compare the grounding systems of the domestic railway corporations and the accidents that are related with the grounding systems. And we give ideas to improve the grounding systems and present standards which are suitable to electric railway.
Keywords
Grounding system; Earth fault; Electric railway; Subway; Railway; Seoulmetro;
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