• 제목/요약/키워드: Electrical Fire Hazard

검색결과 43건 처리시간 0.06초

원전 화재위험도분석에서 전기회로분석 검증방안에 관한 연구 (A Study on the Verification Scheme for Electrical Circuit Analysis of Fire Hazard Analysis in Nuclear Power Plant)

  • 임현태;오승준;김위경
    • 한국안전학회지
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    • 제30권3호
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    • pp.114-122
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    • 2015
  • In a fire hazard analysis (FHA) for nuclear power plant, various electrical circuit analyses are performed in the parts of fire loading analysis, fire modeling analysis, separation criteria analysis, associated circuit analysis, and multiple spurious operation analysis. Thus, electrical circuit analyses are very important areas so that reliability of the analysis results should be assured. This study is to establish essential electrical elements for each analysis for verification of the reliability of the electrical circuit analyses in the fire hazard analysis for nuclear power plants. Applying the results derived by the study to domestic nuclear power plants, it is expected to determine the adequacy of the fire hazard analysis report and contribute to the reliability of the fire hazard analysis of those plants.

건조일체형 드럼세탁기의 화재위험성에 관한 실험연구 (A Experimental Study on the Fire Hazards in Drum-Type Electric Washing Machine)

  • 홍성호
    • 전기학회논문지P
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    • 제57권3호
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    • pp.328-331
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    • 2008
  • This study presents on the analysis fire hazards of drum type electric washing machine. In order to analyze fire hazards fire experiment is conducted. The fire experiment is conducted to simulate under the normal condition and abnormal condition. The experiment under the abnormal condition is simulated in safety device failure, situation of accumulated dust and tracking phenomenon caused by humidity. The results show that fire hazard is high at the abnormal condition. In this paper, we suggest to use the safety device of low operating temperature in electric washing machine for reducing fire hazard.

전기장판의 화재위험성 실험연구 (An Experimental Study on the Fire Hazard of Electric Heating Pad)

  • 이복영;박찬호;박상태;홍성호;유현종
    • 한국화재소방학회논문지
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    • 제20권3호
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    • pp.113-117
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    • 2006
  • 본 연구는 가정용 전열제품인 전기장판에 대한 화재실험과 난연성실험을 통하여 화재위험성을 분석하였다. 화재실험은 정상조건에서 정격전압을 인가하는 경우와 온도조절기 고장시 정격전압이 인가되는 경우를 모델링하였다. 난연성실험은 UL 94의 수직 연소시험방법을 이용하여 전기장판의 난연성능을 평가하였다. 실험에 사용된 전기장판의 종류는 전기매트, 전기요, 비닐장판이다. 실험결과 온도조절기가 고장난 상태에서 정격전압이 인가되는 경우 화재위험성이 높은 것으로 나타났으며 전기장판의 재질은 난연성이 없는 것으로 나타났다.

제조 사업장의 환풍기 화재위험성 조사 (The Survey of Fire Hazard of Fan in Manufacturing Industries)

  • 김성삼
    • 조명전기설비학회논문지
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    • 제27권10호
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    • pp.21-29
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    • 2013
  • The short circuit and overload is presented by main cause of electrical fire. However, 85% of the fan directly connected the outlet box without switch in total 110 fans as a research in manufacturing industries. In installation direction of vertical type fans which was placed on the horizontal surface, only 39 vertical type fans were placed on vertical surface and 71 fans were placed on the horizontal type. The installation direction of the fans warns of the risk of the fire hazard due to the motor stall to the user manual of the maker. However, it is the representative nonconformity example of construction which the people or builder disregards. In addition, the condition of ground connection with the earth leakage prevention was investigated in grounding of 5 fans, non-grounding of 105 fans. The double insulation structure is generally used for small fan and it can't connect ground wire as electric plug of non-grounding type. However, industrial iron fan needs ground wire for electric leakage and to protect against electric shock.

모발건조기의 전기화재 위험요소에 따른 화재 감정기법 연구 (Study of Fire Appraisal Method According to Electrical Fire Hazards of Hair Dryer)

  • 문현욱;이기연;김동우;길형준;김향곤
    • 조명전기설비학회논문지
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    • 제25권12호
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    • pp.113-118
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    • 2011
  • In this study, investigation and appraisal method for the scene of a fire according to electrical fire hazards of hair dryer which is usually used at living space are presented. Hair dryer is briefly composed of heating part, wind part and control part. Electrical fire hazards of hair dryer are insulation destruction of power cord, ignition by overheat of heating coil, scattering spark on inside dust, overheat of motor by fan shackle, ignition by carelessness of user, and so on. Fire cause by hair dryer can be perceived through investigation about half-disconnection of power cord, contact badness of power plug, verification of heating coil, fan and switch. These results are expected to be utilized effectively in a countermeasure to prevent an electrical fire by hair dryer.

드럼세탁기 화재안전성 확보를 위한 실험연구 (A Experimental Study on the Fire Safety of Drum-type Electric Washing Machine)

  • 홍성호;이상현;박상태;유현종;전웅재
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2008년도 춘계학술대회 논문집 전기설비전문위원
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    • pp.131-133
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    • 2008
  • This study presents on the analysis fire hazards of drum type electric washing machine. In order to analyze fire hazards fire experiment is conducted. The fire experiment is conducted to simulate under the normal condition and abnormal condition. The experiment under the abnormal condition is simulated in safety device failure, situation of accumulated dust and tracking phenomenon caused by humidity. The results show that fire hazard is high at the abnormal condition. In this paper, we suggest to use the safety device of low operating temperature in electric washing machine for reducing fire hazard.

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차단기 누적 철분진의 열적특성과 발화위험성 연구 (A Study on the Thermal Characteristics and Fire Hazard of Iron Powder Accumulated on Circuit Break)

  • 김두현;강양현
    • 한국안전학회지
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    • 제27권4호
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    • pp.20-25
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    • 2012
  • The purpose of this study is to analyze the thermal characteristics and to study fire hazard of electric leakage by iron power accumulated on circuit breaker in an iron processing factory. The thermal characteristics were analyzed while current was applied to the powder for ten minutes. Results showed that temperature of iron powder at 100 mA is $160^{\circ}C$ and at 175mA is $240^{\circ}C$. The sparks have occurred as iron powder drops between two(hot line and neutral line) wires and then iron powder explosion occurred while dropping continuously the iron powder on two lines. Those who work in the iron processing industry need to periodically remove and maintain the iron powder. The thermal characteristics in this paper can be used for electrical fire investigation and for basic data of thermal characteristic of leakage current through iron powder at iron processing factories.

과부하 및 물리적 손상(반단선)에 의한 전선의 열적특성 해석 (Analysis for the Thermal Properties of the Electrical Wire according to Overload and Disconnection)

  • 김성철;김두현
    • 한국안전학회지
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    • 제22권4호
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    • pp.26-31
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    • 2007
  • According to the statistical analysis on the electrical fire of 2005 years, most of electrical fire is generated from short circuit(4,985 cases), overcurrent(755 cases) leakage current(391 cases), poor contact(378 cases), disconnection(36 cases) on the electrical wiring device. The researches for the fire hazard about normal electric wiring have already been progressing in the advanced country such as USA and Japan, but Comparative study of the disconnection has not been conducted. Therefore, in this paper, we have simulated the thermal analysis for electrical wire according to deteriorating time in a normal state and disconnection with electrical wire using the electrical-thermal finite element method(Flux 3D). This paper acquire basis data of electricity fire signal by disconnection and wish to help for electrical fire cause diagnosis business.

The Fire Hazard of Screwed Electric Contacts Due to Mechanical Vibration at Low Voltage Equipment

  • Choi, Chung-Seog;Kim, Young-Seok;Kim, Hyang-Kon
    • International Journal of Safety
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    • 제4권2호
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    • pp.18-23
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    • 2005
  • There are many electrical connections in the electric apparatus and most fires due to a fault contact result from a failure or misuse of electric apparatus and installation. The fault contact happens between electrical connections by the loose and the mechanical vibration. In this paper, we have investigated thermal and electrical properties of screwed electric contacts due to the mechanical vibration. The exciter was connected to a signal generator and power amplifier that provided the vibration frequency and amplitude. The vibration, temperature and voltage data were sent to a data acquisition system (DAQ). In the case that fault contact took place, the arc happened between the screwed electric contact and electric wire, heat due to the arc was transmitted to the adjacent insulators, for which the oxide could be generated more. In addition, a spark was generated and the insulator began to melt. Thus, the possibility of electrical fire became the highest in this case. Finally, when the fault contact takes place due to vibration, the hazard of an electric accident is very high.

국내 원자력발전소의 공기 압축기실에서 윤활유 화재의 위험성 분석을 위한 FDS의 활용 (Application of FDS for the Hazard Analysis of Lubricating Oil Fires in the Air Compressor Room of Domestic Nuclear Power Plant)

  • 한호식;황철홍;백경록;이상규
    • 한국안전학회지
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    • 제31권2호
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    • pp.1-9
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    • 2016
  • The standard procedure of fire modeling was reviewed to minimize the user dependence, based on the NUREG-1934 and 1824 reports. The hazard analysis of lubricating oil fires in the air compressor room of domestic nuclear power plant (NPP) was also performed using a representative fire model, FDS (Fire Dynamics Simulator). The area ($A_f$) and location of fire source were considered as major parameters for the realistic fire scenarios. As a result, the maximum probability to exceed the thermal damage criteria of IEEE-383 unqualified electrical cables was predicted as approximately 70% with $A_f=1m^2$. It was also found that for qualified electrical cables, the maximum probabilities of exceeding the criteria were 2% and 90% with $A_f=2$ and $4m^2$, respectively. It was concluded that all electrical cables should be replaced with IEEE-383 qualified cables and the dike to restrict as $A_f{\leq}2m^2$ should be installed at the same time, in order to assure the thermal stability of electrical cables for lubricating oil fires in the air compressor room of domestic NPP.