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FMECA Procedure for Failure Analysis of Train High-Speed Circuit Breaker

전동차 고속차단기 고장 분석을 위한 FMECA 기법

  • Kim, Sung-Ryeol (Department of Railway Electrical/Signalling Engineering, Seoul National University of Science and Technology) ;
  • Moon, Yong-Sun (Megaelec Co.) ;
  • Choi, Kyu-Hyoung (Department of Railway Electrical/Signalling Engineering, Seoul National University of Science and Technology)
  • 김성렬 (서울과학기술대학교 철도전기신호공학과) ;
  • 문용선 ((주)메가일렉) ;
  • 최규형 (서울과학기술대학교 철도전기신호공학과)
  • Received : 2015.03.19
  • Accepted : 2015.05.07
  • Published : 2015.05.31

Abstract

FMECA(Failure Mode, Effects and Criticality Analysis) techniques to make quantitative evaluation of failure effects severity and criticality have been applied to systematic failure analysis for reliability improvement of train which should provide regular service and secure high level of safety as a mass transportation system. These FMECA techniques do not fully reflect the inherent train operation and maintenance circumstances because they are based on the FMECA standards devised for other industries such as automobile industry and FMECA standard dedicated to train industry has not been established yet. This paper analyzes FMECA standards for various industries, and suggests a FMECA technique dedicated to train industry which makes failure effect analysis and criticality analysis step by step and makes criticality analysis placing emphasis on the severity of the failure effect. The proposed technique is applied to FMECA of high-speed current breaker which is a core safety device of train using field failure data for 15 years of train maintenance. The FMECA results show that breakage of arc chute has the highest risk with 3rd severity class and 5th criticality class among all the components of high-speed circuit breaker. Damage and poor contact of electronic valve, and cylinder breakage with 3rd severity class and 4th criticality class are followed by. These results can be applied to improvement of design and maintenance process for high-speed circuit breaker of train.

Acknowledgement

Supported by : 국토교통과학기술진흥원

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