초록

연구결과
필요성 및 목표
과전류 및 외부 열원에 의한 용단 특성의 실험적 연구를 통해 화재 현장에서 수거된 퓨즈의 용단 형상 검사를 통하여 용단 원인 추정의 방법 및 판단 기준 마련
방 법 및 결 과
다양한 퓨즈에 과전류, 고전압을 인가하여 가용체의 용단형태 및 성분 분석을 관찰함으로써 퓨즈가 과전류에 의하여 용단되었는지, 외부 화염에 의하여 용융되었는지 의 판단 근거를 마련
기대성과
화재 현장에서 수거한 전원퓨즈의 실험적 검사를 통하여 용단 원인에 대한 객관적 판단 근거의 마련

Abstract ▼

* Fuse has a characteristic that fused by an electrical property causes, and external heat source. In the case caused by electrical properties, the fuse blows by the factors such as electrical breakdown, over-current flows and over-current surge coming from outside. By using this point to determine

* Fuse has a characteristic that fused by an electrical property causes, and external heat source. In the case caused by electrical properties, the fuse blows by the factors such as electrical breakdown, over-current flows and over-current surge coming from outside. By using this point to determine whether the fuse to blow in the event of a fire related electric devices can help reveal the cause of the fire investigation.
In this study, we have compared the properties of the shape of the fuse that fused by surge current, over-current and external heat source for the evaluation of the fusing characteristics and assessment of the shape of the melting fuse.
The appearances of the normal fuse element, cross-section of normal fuse element, ferrule's inside & outside, fuse element melted by the external flame, fuse element exposed to external flame after fused by over-current and fuse element exposed to external flame while the current is flowing were examined by using a microscope. And we examined the metal structure by using FE SEM and component analysis by using EDX. Using these results, we evaluate the discrimination whether the fuse was melted by external flame or fused by over-current.
Though this way, we studied the differences between the fuse melted by the external flame and the fuse exposed to external flame. The database was constructed through various melting and fusing experiments. The causes of fuse breaking were able to distinguish, based on the melting or fusing location. It can be determined whether or not the melting of the fuse element, by using FE SEM, EDX. These parts are considered by the performance of this study.
We built the database about the fuse blow fore and component analysis applying an over-current and high voltage in the fuse for different capacity. To use them as a resource on the educational process is expected to take advantage of the fire investigators of National Forensic Service, police, fire officials and related organizations.