• Title, Summary, Keyword: electrical fire

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A statistics and study of fire cause by electrics (전기로 인한 화재 원인 통계와 고찰)

  • Lee, Young-Soo;Kim, Myeong-Soo;Hawng, Byung-Pyo;Kim, Hyeong-Soo;Song, Young-Hak
    • Journal of Korean Institute of Fire Investigation
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    • v.10 no.1
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    • pp.47-57
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    • 2007
  • If it were the occurrence of fire by electricity with the rapid growth of economy, it would be serious damage for nation that effect human life and properties. To prevent electrical fires, it was basic countermeasure that make detail statistics classified by the source, place etc. with examining correct cause of fire. In this paper, we analuzed the present condition of fire occurrence of the lastest ten years and classified fires by the source, place, month in 2006. In addition our corporation staff execute in-depth and professional research on the actual state of electrics fire by visiting fire stations fire of the whole country for 8,554 electric fires in 2005. I expect this thesis to be used for preventing electric fires and providing a stepping stone on correct production of fire statistics.

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A Study on Electrical Fire Disaster Prevention Device used in Double Circuit Break (고정밀 전류센서를 이용한 이중 차단용 전기화재 방재장치에 관한 연구)

  • Park, Dong-Pil;Kwak, Dong-Kurl;Jung, Do-Young;Kim, Choon-Sam;Shin, Ho-Joon
    • Proceedings of the KIEE Conference
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    • pp.2102-2103
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    • 2008
  • The major causes of electrical fire are classified to short circuit fault, overload fault, electric leakage and electric contact failure. The occurrence factor of the fire is electric arc or spark accompanied with electrical faults. Residual Current Protective Device(RCD) of high sensitivity type used at low voltage wiring cuts off earth leakage and overload, but the RCD can't cut off electric arc or spark to be a major factor of electrical fire. As the RCDs which are applied low voltage distribution panel are prescribed to rated breaking time about 30[ms](KS C 4613), the RCDs can't perceive to the periodic electric arc or spark of more short wavelength level. To be improved on such problem, this paper is proposed to a electrical fire disaster prevention device(EFDPD) for a RCD trip or a self circuit-breaking function on electric arc or spark due to electrical fire. Some experimental results of the proposed apparatus is confirmed to the validity of the analytical results.

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Experimental Studies on the Risk Assessment of Electrical Fire and Shock of LED Lighting for Outdoor (옥외용 LED 조명의 전기화재 및 감전 위험성 평가에 대한 실험적 고찰)

  • Kim, Hyang-Kon;Gil, Hyoung-Jun;Kim, Dong-Ook;Kim, Dong-Woo;Lee, Ki-Yoen;Moon, Hyun-Wook;Kim, Hyeog-Soo;Kim, Myung-Soo;Kim, Man-Geon
    • Congress of the korean instutite of fire investigation
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    • pp.77-97
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    • 2011
  • In this paper, we studied risk assessments of electrical fire and shock of LED lightings for outdoor. We examined national regulations about the LED lighting for outdoor and analyzed the appearances and compositions of LED lightings. And, We experimented about water proof, line to line fault, line to line breakdowm, overvoltage, line to line leakage in overhead line or water of LED lighting. From experimental results, we know that there are risks of electrical fire and shock by abnormal conditions at the LED lighting. Therefore, the uses of protective devices and insulated type of converter are required for the electrical safety. We expect that the results of this study would be helpful for the improvement of regulations and standards for electrical safety and for the investigations of electrical accidents of LED lightings.

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A Study on the Thermal Analysis of Fire-Resistance Cable using FEM (유한요소법을 이용한 내화전선의 열해석에 관한 연구)

  • 오홍석;이상호
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.53 no.5
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    • pp.338-343
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    • 2004
  • In general, the insulation and protective sheaths on electrical conductors are made of combustible substances like PVC, natural or synthetic rubbers, and other organic or synthetic materials. When an electrical fire starts due to overheating of conductors/joints or sparking/arcing, the first thing to ignite is usually the insulation on the cables. When the insulation bums, the produced fumes are very toxic. To solve the problem, we have surely need the fire resistance cable that doesn't bum in a high temperature and emit toxic fume for operating a disaster prevention installation. In this paper, we have simulated the thermal analysis for the fire resistance cable according to the values of current in a overload and a short, and the values of outside flame with the fire resistance cable of the L's company product(600 V, FR-8 : Four Core) using the finite element method(Flux2D).

The Influence of Forest Fire on the Characteristics of Polymer Insulator for Transmission Lines (산불영향에 따른 송전용 폴리머애자의 특성)

  • Lee Donu-Il;Chung Yong-Woon;Yu Kun-Yang;Choi In-Hyuk
    • The Transactions of the Korean Institute of Electrical Engineers C
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    • v.54 no.3
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    • pp.127-131
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    • 2005
  • Big fire such as mountain fire may cause the prevention of the functions of the overhead cables and insulators, which may affect the operation of the transmission lines. In the worst case, this kind of disaster may have a huge effect on the whole industry of a country. However, the study on the effect of the mountain fire on the transmission line is very rare. Therefore, in order to understand the effect of the mountain fire on the polymeric insulator for transmission lines, the author observed the deformation of the sheds of the polymeric insulators and the change of the discs of the porcelain insulators under fire, varying the ignition time using the artificial ignition testing equipment which simulates the mountain fire, and investigated the electrical and mechanical characteristics of the insulators after the ignition test. For the test, the miniature insulators made of polymeric material and porcelain have been utilized. As the result, the following conclusions were obtained. First, the porcelain insulator was degraded in electrical characteristics when the insulator was subjected to the fire for approximately 5 minutes; whereas, the polymeric insulator was not degraded though there were some damage on its sheds. Second, after 20 minute exposure to the fire, the polymeric insulator lost a lot of parts of sheds, but the electrical characteristics was lowered by around $20\%$, but the porcelain insulators were electrically degraded by more than $80\%$.

Fire Cause Analysis of Local Heating on Carbon Type Hot Wire Electric Pad (카본열선을 사용하는 전기장판의 국부가열에 의한 화재원인 분석)

  • Song, Jae-Yong;Kim, Jin-Pyo;Nam, Jung-Woo;Sa, Seung-Hun
    • Fire Science and Engineering
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    • v.24 no.4
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    • pp.104-108
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    • 2010
  • This paper describes electrical fire on electric pad using carbon type hot wires. A carbon type hot wires electric pad is virtually impossible to connect hot wire as a method of electrical welding or soldering. In order to connect between hot wires, that has to splice carbon type material connector. If junction of hot wires was occurrence of poor connection on electric pad, it increase contact resistance on this junction point. With increasing contact resistance, junction of hot wires on electric pad generates local heating and finally leads to electrical fire. In this paper, we analyzed shape of damage in hot wires caused by electrical local heating and investigated fire cause on electric pad using by carbon type hot wires.

A Study on Dynamic Characteristics of EFPCD for Conductor Breaks in Low Voltage Wiring (저압배선 선로의 단선사고 발생시 전기화재예방 제어장치(EFPCD)의 동작 특성에 관한 연구)

  • 이상호;신미영;이경호
    • Fire Science and Engineering
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    • v.18 no.3
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    • pp.103-107
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    • 2004
  • Recently. the spark and the overheat due to in the conductor breaks have been the major causes of electrical fire in low voltage wiring. Also, because in these cases the current is a surge one, the losses and faults of a communication, a home appliances, a computer and a measuring instrument may occur. Especially, in such cases, we are very difficult to detect the condition of the conductor breaks. In this paper, we have developed an auxiliary control device, the electrical fire prevention control device (EFPCD), of an earth leakage breaker (ELB). And we can prevent the electrical fire caused by the spark and the overheat occurring in the conductor breaks with the EFPCD.

Reliability Assessment of Forest Fire on Silicone Polymer Insulators in Transmission Lines( I ) (송전용 실리콘 폴리머애자의 산불영향 신뢰성 평가( I ))

  • Choi, In-Hyuk;Lee, Dong-Il;Chung, Yong-Woon;Yu, Kun-Yang
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.17 no.11
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    • pp.1199-1204
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    • 2004
  • Most overhead transmission lines in Korea run over the mountain; however, only little study has been made for the effect of mountain fire on polymeric insulator for transmission lines, though the study is significantly required, Therefore, in this study, the authors observed the deformation of the sheds of the insulator under fire, varying the ignition time using artificial ignition testing equipment, and investigated electrical and mechanical characteristics of the insulator through dry withstand voltage test, impulse flashover test and tensile load test. As the results of the tests, the following conclusions were obtained, First, when the insulator was subjected to the fire, the electrical characteristics were slightly reduced, but there was no change on the mechanical characteristics, Secondly, the sheds and sheath of the insulator were not non-flammable but less-flammable. These two results show the high mechanical stability and durability of the insulator under severe fire condition, though the electrical characteristics can be deteriorated as the time that the insulator is subjected to fire, goes by.

A study of the Influence of Forest Fire on Polymer Insulator for UHV (초고압용 폴리머 애자의 산불영향 연구)

  • Choi, In-Hyuk;Choi, Jang-Hyun;Jung, Yoon-Hwan;Lee, Dong-Il
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • pp.254-259
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    • 2005
  • Big fire such as mountain fire my cause the prevention of the functions of the overhead cables and insulators, which may affect the operation of the transmission lines. Therefore, in order to understand the effect of the mountain fire on the polymeric insulator for transmission lines, the author observed the deformation of the sheds of the polymeric insulators and the change of the discs of the porcelain insulators under fire, and investigated the electrical and mechanical characteristics of the insulators after the ignition test. As the result the following conclusions were obtained. First, the porcelain insulator was degraded in electrical characteristics when the insulator was subjected to the fire for approximately 5 minutes; whereas, the polymeric insulator was not degraded though there were some damage on its sheds. Second, after 20 minute exposure to the fire, the polymeric insulator lost a lot of parts of sheds, but the electrical characteristics was lowered by around 20%, but the porcelain insulators were electrically degraded by more than 80%.

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ELECTRICAL FIRE (전기화재)

  • Park, Heon-Sik
    • Fire Protection Technology
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    • pp.13-22
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    • 1991
  • To understand electrical fire, the cause of it is classified into overcurrent, short circuit, leak, joint, overheat, accumulation of heat, spark, deterioration of insulation, static electricity, and lightning etc. and explained. And then by the precautions to it, proposed to the improvement of electric products, the completeness of safecty management and the use of alarm systems.

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