Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 2003.07c
- /
- Pages.1463-1465
- /
- 2003
A Study on the Growing Characteristics of Dendrite Structure of Melted Wire Deteriorated by Over Current
과전류 열화에 의해 용단된 전선의 수지상 조직 성장특성에 관한 연구
- Shong, Kil-Mok (Electrical Safety Research Institute) ;
- Choi, Chung-Seog (Electrical Safety Research Institute) ;
- Kim, Dong-Woo (Electrical Safety Research Institute) ;
-
Kwak, Hee-Ro
(Soongsil Univ.)
- Published : 2003.07.21
Abstract
In this paper, we studied on the growing characteristics of dendrite structure of melted wire deteriorated by over current. Electric wire was melted by Jolue's heat. By using HSIS(High Speed Imaging System), we found out a lot of melted parts of wire were dispersed and radiated. Electric wire had narrow melted areas in case of short fusing time. A lot of very small dots generated around the grain of copper cross-section and they were changed into dendrite structure. Dendrite structure appeared at the values lower than 2.5[A/sec]. In case of very short fusing time, fusing current was calculated by empirical formula. The Preece equation was not enough to analyze a variety of characteristics of melted wire because it did not consider melting time, atmosphere, etc.
Keywords