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지하철 차량기지에서의 등전위 본딩에 의한 신호시스템 낙뢰보호대책
徐石喆(Seog-Chul Seo),崔圭亨(Kyu-Hyoung Choi) 대한전기학회 2007 전기학회논문지 Vol.56 No.1
Signalling equipments at railroad sites are widely exposed to high voltage lightning surges. This paper presents a lightning protection system for the signalling equipments at subway car depots. The main features of the system are as follows : (1)the common grounding system between power system grounds and the signaling system grounds, (2)physical and chemical methods to reduce grounding resistivity, (3)rearrangement of lightning rods based on the rolling ball theory, (4)equi-potential bonding networks to minimize the potential differences between the equipments grounds. The system has been constructed at six subway car depots in Seoul metropolitan area and it is measured that the grounding resistivity are reduced to 0.266 ohms and the potential differences between devices are reduced to a negligible quantity. After the construction of the systems, it has not been reported the break-down of the signalling equipments caused by lighting surges.
최규형(Kyu-Hyoung Choi),서석철(Seog-Chul Seo),최세완(Se-Wan Choi) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
This paper describes the lightning protection system for railway signaling equipments installed at subway car depots in Seoul metropolitan Rapid Transit Cooperation. Several measures for improving lightning protection performance are adopted; newly organized grounding system for neutral line of power system, rolling method to minimize damages induced by direct lightning strike, new measures to reduce voltage differences between the signaling equipments and the ground, and improvement of grounding system. The proposed system has greatly reduced the grounding resistance and also the voltage difference between the signaling equipments and the ground, and has prevented the accident related with lightning surges since it was installed. The proposed approach can be viewed as a useful alternative of dealing with lightning protection for railway signaling equipments.
이덕규(Duk-Gyu Lee),신건영(Kun-Young Shin),김일환(Il-Hwan Kim),서석철(Seog-Chul Seo),박종헌(Jong-Hun Park),김기춘(Ki-Chun Kim) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
As a public transit playing an important role in the era of high gas prices subway corresponds the national strategy 'Low carbon Green growth'; accordingly passengers who would use the transportation are steadily increasing. Subway operators are required to provide subway users with services based on higher-quality system safety convenience & high reliability level. Furthermore as the legally allowed maximum life time of EMUs is extended it is necessary to localize & standardize the parts of EMUs. This paper presents a modelling of systematic EMU(SR001) manufacturing technique which enables us to reflect passenger and subway operator's demands in the whole EMU manufacturing process from the initial design phase to its completion by making full use of the know-how based on subway operators' experiences. SR001 enabled SMRT's staffs to participate in the EMU design & its equipment manufacturing; consequently it realized the innovative system which meets passengers' requirements. Moreover the process lead time was reduced dramatically. The result of this research will be helpful in providing useful guidelines for railway industry policy and development making in Korea.
신국호(Kook-Ho Shin),오안섭(Ahn-Sup Oh),신건영(Kun-Young Shin),황홍환(Hong-Hwan Hwang),서석철(Seog-Chul Seo) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
Recently railway operators are doing a lot of researches and studies in order to apply reliability technologies to their maintenance tasks. The maintenance in the aviation and the munitions industry has been developed enough to be benchmarked with the high quality reliability technologies; however railway industry is still situated in a rudimentary stage with insufficient & limited data. 5678 Seoul Metropolitan Rapid Transit Corporation which has 17 year experience of the EMU maintenance and system development has made a constant effort for appling RCM (Reliability Centered Maintenance) to the maintenance for a few years. In this connection the case study is to be introduced. This paper is based on 'RCM Gateway to World Class Maintenance' by Anthony M. Smith". The reliability technology are applied to the specific EMU and its system by 7 stages; accordingly applying SMRT's maintenance experience a unique standard for FMEA(failure mode effect analysis) & LTA(logical tree analysis) is established. Moreover for reasonable and effective preventive maintenance tasks the case considering an analysis of failure effects is selected in the final step 7. SMRT will develop reliability technologies through the application of the results to all the EMU systems.
도시철도차량(SR001)의 RAMS 기술 적용에 관한 연구
신건영(Kun-Young Shin),황홍환(Hong-Hwan Hwang),장성태(Seong-Tae Jang),이덕규(Duk-Gyu Lee),서석철(Seog-Chul Seo),박흥수(Heung-Soo Park),장영봉(Yeong-Bong Jang),장주수(Ju-Su Jang),이희성(Hi Sung Lee) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
There are lots of efforts to get more and more higher level of reliability maintainability availability and safety in all the railway system development process. To do a RAMS activity and process very effectively many an information is required based on operational knowledge and manufacturer's engineering technology together. But some interests between organization in demand sector and manufacturers in supply makes it difficult to do. This paper for this reason presents an idea about the activities and process for SR001 system which is newly under developing and manufacturing by SMRT. Especially we provide it with some idea how to integrate every activity and process and to analyze it specifically for system level as well. With these efforts we provide a typical RAMS process of SR001 that could be applicable to other rolling stock system and the improvement of the system over total life cycle phases.