• Title/Summary/Keyword: 화재 사고

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가정에서의 전기안전 대책

  • 남상윤
    • JOURNAL OF ELECTRICAL WORLD
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    • s.282
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    • pp.80-83
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    • 2000
  • 생활수준의 향상으로 일반가정에서 사용하는 전기용품의 종류도 무척 다양해졌으며 사용량도 급격히 증가되어 이로 인한 전기재해(화재, 감전)가 끊이지 않고 있다. 행정자치부 화재통계 연보에 따르면 ''99년도 총 화재발생건수 33,856건 중 전기로 인한 화재가 11,204건으로 33.1$\%$의 높은 점유율을 보이고 있어 일반가정에서의 전기안전 생활화가 절실히 요구되고 있는 실정이다. 일반 가정생활에서 편리하게 사용하고 있는 전기를 보다 더 안전하게 사용하기 위해서 우리 모두가 꼭 알아두어야 할 전기설비에 관한 기초상식, 전기사고의 종류와 예방대책, 정전 시 대처요령 등을 알아본다.

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Development on Electrical Fire Prevention System of Small Size and High Speed by using PTC Thermistor (PTC 서미스터를 이용한 소형 고속응성의 전기화재 방재시스템 개발)

  • Kwak, Dong-Kurl
    • Journal of the Microelectronics and Packaging Society
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    • v.15 no.1
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    • pp.51-58
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    • 2008
  • This paper is studied on a prevention system for electrical fire and electrical faults by using electrical temperature characteristic of PTC thermistor. The PTC thermistor has characteristic of positive resistivity temperature coefficient according to the temperature variation, which is construction of a regular square and cube demarcation with $BaTiO_3$ ceramics of positive temperature coefficient. Also PTC shows the phenomenon which is rapidly increased in the resistivity if the temperature is increased over Curie temperature point. This paper is proposed on a protective control system used with temperature sensor of PTC thermistor. The proposed prevention system will prevent electrical fires due to electric short circuit faults or overload faults. And the prevention system will solve the problems that circuit breakers to be commonly used at existing are happened frequently electrical fires and electrical disasters due to incapable operation, weak reliability and low speed response. Some experimental results of the proposed apparatus are confirmed to the validity of the analytical results.

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A Electrical Fire Disaster Prevention Device of High Speed and High Precision by using Semiconductor Switching Devices (반도체 스위칭 소자를 이용한 고속 고정밀의 전기화재 방재장치)

  • Kwak, Dong-Kurl
    • The Transactions of the Korean Institute of Power Electronics
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    • v.14 no.5
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    • pp.423-430
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    • 2009
  • Recently as the inactive response characteristics of the existing RCD used on low voltage power distribution system, so control of overload and electric short circuit faults, major causes of electrical fires, are not enough. Therefore, this paper confirms the unreliability of the existing RCD by electrical fault simulator and proposes a EFDPD by using semiconductor switching devices and a high precision current sensor (namely, reed switch) for the prevention of electrical disasters in low voltage power distribution system caused by overload or electric short circuit faults. The sensitive reed switch in the proposed EFDPD exactly detects the increased magnetic flux with the overload or the short current caused by a number of electrical faults, and the following, the self circuit breaker in EFDPD rapidly cuts off the system. The proposed EFDPD confirms the excellent characteristics in response velocity and accuracy in comparison with the conventional circuit breaker through various operation performance analysis. The proposed EFDPD can also prevent electrical disasters, like as electrical fires, which resulted from the malfunction and inactive response characteristics of the existing RCD.

Cause Investigation and Verification of Fire Accidents for Road and Street Lighting (가로등 화재사고의 원인규명과 검증)

  • Shong, Kil-Mok;Han, Woon-Ki;Kim, Jong-Min;Kim, Young-Seok;Kim, Myoung-Soo;Kim, Hyeok-Soo
    • Journal of Korean Institute of Fire Investigation
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    • v.11 no.1
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    • pp.31-36
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    • 2008
  • This paper carried out a variety of analysis for a finding out the causes of fire on the street lamp. The glass bulb of 250W metal-halide(MH) lamps attached with the impurities rose the temperature by at $410.4^{\circ}$ in normal condition. Therefore, a lamp apparatus is needed the improvement for ventilation and the protection against dust. The heat of MH lamps is diffused through out the luminous tube, a glass bulb, and apparatus by degrees. The accident cause of the lamp is presumed that the accumulated heat by deposits of the inner part. It will be recommended the improvement of the structure that aren't the external impurity and accumulated heat in the MH lamps set.

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