Earticle

초록

영어

In a recent refrigerator fire, there is a case where it was concluded that the fire was caused by other reasons, such as overcurrent, as a result of analyzing evidence that could be attributed to a relay abnormality. control unit during fire investigation, various devices are connected to the load side and the arc generated when the relay is operated repeatedly is eliminated. It was designed and tested as an experiment to check the possibility of fire that can occur by deforming the contact point. As a result of the experiment, it was observed that severe melting and damage were seen at the contact point, and that it was difficult to distinguish the boundary between Ag and Cu. As a result of X-ray confirmation, distortion and flattening of the contact point were observed. As a result of EDS analysis, most of the sample contacts contained Ag, but in the case of the relay contacts connected to the load, Ag decreased and O, Cu, and Sn increased. As a result, the higher the frequency of use of the relay, the higher the temperature and resistance due to the arc inside, and the change of the shape, surface, and composition of the contact could lead to ignition. It is suggested that appropriate countermeasures against relay fires such as method guidance are necessary.

목차

Abstract
1. 서론
1.1 연구의 배경과 필요성
1.2 연구의 목적 및 방법
1.3 기대 효과
2. 이론적 배경
2.1 릴레이의 종류
2.2 전자기 릴레이 구조(작동 원리)
2.3 아크(arc)의 발생 원리와 현상
2.4 최근 발생한 화재사례(2건)
3. 실험
3.1 실험의 절차
3.2 DATA SHEET (SRD Series 7A/10A/15A)
3.3 부하별 릴레이 작동 실험
3.4 릴레이 코일 저항 측정
3.5 릴레이 표면 색깔 및 릴레이 접점 저항 측정
3.6 X-ray 분석
3.7 접점의 EDS 성분분
3.8 실체현미경 검사 분석
4. 결론
4.1 연구 결과
4.2 실험의 한계
참고문헌

키워드

저자

• 배두환 [ DuHwan Bae | 경북소방본부 문경소방서 ]
• 이강일 [ Kangil Lee | 경북소방본부 문경소방서 ]
• 고상진 [ SangJin Goh | 경북소방본부 문경소방서 ]
• 한상희 [ SangHui Han | 경북소방본부 문경소방서 ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국화재감식학회 학회지 [Magazine of Fire Investigation Socity of Korea]

• 간기

  계간

• pISSN

  2092-531X

• 수록기간

  2009~2026

• 등재여부

  KCI 등재

• 십진분류

  KDC 539 DDC 628