• Title, Summary, Keyword: electrical fire

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The develpment of Black-Box for ldentification Electrical Fire (전기화재감식용 블랙박스 개발연구)

  • Lee, Bok-Yeong;Gwon, O-Seung;Jeong, Chang-Gi;Park, Sang-Tae
    • Fire Protection Technology
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    • pp.46-54
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    • 2001
  • According to the use of electric power increases, the fire which ignited by electrical causes increases too. In this thesis electrical fires which occurs in the country for the past ten years are analyzed and developed the technology to identify the electrical fire. The focus of study is method to identify the electrical fires. The causes of electrical fire, it is analyzed a short-circuit and a over current, which take the highest ratio compare with other causes. The rationalization of identification, an electrical operating status is continuous monitored and the status can be accessed, black-box for identification electrical fires. The results of the study are the causes of electrical fire are found out logically, and the developed black-box for identification fires.

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A Study on Fire Investigation Technique For Single Line to Ground Faults in Distribution Line Using EMTP Simulation (EMTP 시뮬레이션을 통한 배전선로의 1선 지락 사고시 화재 조사 기법에 관한 연구)

  • Yoo, Jeong Hyun;Kim, Hie Sik;Lee, Hoon Gi;Cho, Yong Sun
    • Journal of the Korean Society of Safety
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    • v.33 no.3
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    • pp.21-26
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    • 2018
  • Approximately 20% of the total fire is electrical fire, and electrical energy is a potential source of heat. Large-scale fault currents that occur during a line ground fault flow into electric utility poles, electric power equipment, or electric appliances of the customer, and cause simultaneous electrical fire. In this paper, we investigated the possibility of fire through the change of fault current flowing in faulty and sound feeder in case of 1 line ground fault in 22.9 kV distribution line. We propose a fire investigation analysis method for simultaneous multiple electrical fire such as evidence analysis method, and fault current occurrence confirmation method in case of fire accident by analyzing the fault current occurring in the ground fault in the distribution line using EMTP, electric power system analysis program.

The Heating of Cu-oxide and Arc Properties according to Electrical Poor Contact (전기적 불완전 접촉에 따른 동산화물의 발열 및 아크 특성)

  • Kim, Wansu;Park, SangJune;Hwang, DongHyun
    • Journal of the Korean Society of Safety
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    • v.34 no.3
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    • pp.15-20
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    • 2019
  • As industry is progressing and standards of living are improved, the demand of electrical energy is expected to grow 8-9% annually. Therefore, the importance of electrical fire prevention technology with the ability of the power supply is being emphasized. According to the statistics of fire in Korea, fire occurred about 45,000 cases annually, and electrical fire possessed about 20%. The electrical fire by poor contact has increased gradually, can be connected as great fire to secondarily induce short circuit and earth fault. Then analysis of heating causes of electrical connections between copper and copper alloy is needed. Also, detection and analysis algorithm of oxide at copper alloy are necessary. In this research, in order to understand the characteristics of oxide growth with rising resistance and heating, it is demonstrated that the oxide at electrical connections can cause fire due to arcing.

A Study on the Fire Detection Algorithm for Early Fire Detection of Electrical Fire (전기화재 조기감지를 위한 화재감지알고리즘 연구)

  • Lee, Bock-Young;Park, Sang-Tae;Hong, Sung-Ho;Baek, Dong-Hyun
    • Proceedings of the KIEE Conference
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    • pp.2164.1_2165.1
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    • 2009
  • In this study we suggest fire detection algorithm using fuzzy inference with input variables of temperature and smoke density to detect electrical fire of early stage. The algorithm consists of membership function of temperature and smoke density and fire probability. The antecedent part of the algorithm consists of temperature and smoke density, and the consequent part consists of fire possibility. The inference rules of the algorithm is estimated to input temperature and smoke density obtained by real fire. With the help of algorithms using fuzzy inference we may be diagnose electrical fire precisely.

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Studies on the Causes and Identification of Electrical Fire (전기화재의 원인 및 감식에 관한 연구 (제2부) 전기화재의 감식 및 예방)

  • 우형주
    • 전기의세계
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    • v.15 no.5
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    • pp.13-24
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    • 1966
  • This paper, as an attempt to meet the practical needs in the fire protection field of Korea, has dealt with establishing the identification criteria and prevention theory of electrical fire. The causes analysis of electrical fire was already conducted and then reported by the authors in the Journal of the Korean Institute of Electrical Enginers, October, 1966. This paper is, therefore, the next results of a series of studies on the causes and identification of electrical fire.

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A Study on the Unique point about the Tracking at Electrical fire spot (화재현장에서 분석 절차에 따른 전기화재 조사기법 개발)

  • Kim, Dong-Ook;Lee, Ki-Yeon;Gil, Hyung-Jun;Kim, Hyang-Kon;Chung, Young-Sik
    • Proceedings of the KIEE Conference
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    • pp.2130-2131
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    • 2011
  • Electric fire breaks out by various causes such as electric short, overload(over current), leakage current, poor contact, static electricity, insulation deterioration, partial disconnection and etc. In this paper, we studied analysis technique for scientific and systematic judgment for distinction of electricity fire existence and nonexistence, and described about electricity fire cause analysis process for collecting physical evidences. We handled external form analysis, Substance extension analysis, X-ray transmission analysis, cross-section analysis, thermal analysis, chemical structure analysis, surface structure analysis, component analysis, electrical properties analysis, and circuit analysis by analysis technique for electricity fire cause judgment. We expect that analysis technic elevation and correct cause of fire analysis of scene of a fire investigators and analysts through this paper which see help.

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A Study on Analysis on an Automotive Fire Case that Broke Out due to an Electrical Cause during Engine Stopping (엔진정지 중 전기적인 원인에 의해 발생한 자동차화재의 분석 연구)

  • Lee, Euipyeong
    • Transactions of the Korean Society of Automotive Engineers
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    • v.21 no.1
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    • pp.9-16
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    • 2013
  • Although it is widely accepted that a fire can occur due to electrical causes even when an engine stops, there is little introduction of detailed case analysis. This study analyzed a fire case caused by an electrical cause during engine stopping at parking lot in detail. Moreover, it was revealed that the fire was mainly caused by design defect.

A Knowledge-based Electrical Fire Cause Diagnosis System using Fuzzy Reasoning (퍼지추론을 이용한 지식기반 전기화재 원인진단시스템)

  • Lee, Jong-Ho;Kim, Doo-Hyun
    • Journal of the Korean Society of Safety
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    • v.21 no.3
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    • pp.16-21
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    • 2006
  • This paper presents a knowledge-based electrical fire cause diagnosis system using the fuzzy reasoning. The cause diagnosis of electrical fires may be approached either by studying electric facilities or by investigating cause using precision instruments at the fire site. However, cause diagnosis methods for electrical fires haven't been systematized yet. The system focused on database(DB) construction and cause diagnosis can diagnose the causes of electrical fires easily and efficiently. The cause diagnosis system for the electrical fire was implemented with entity-relational DB systems using Access 2000, one of DB development tools. Visual Basic is used as a DB building tool. The inference to confirm fire causes is conducted on the knowledge-based by combined approach of a case-based and a rule-based reasoning. A case-based cause diagnosis is designed to match the newly occurred fire case with the past fire cases stored in a DB by a kind of pattern recognition. The rule-based cause diagnosis includes intelligent objects having fuzzy attributes and rules, and is used for handling knowledge about cause reasoning. A rule-based using a fuzzy reasoning has been adopted. To infer the results from fire signs, a fuzzy operation of Yager sum was adopted. The reasoning is conducted on the rule-based reasoning that a rule-based DB system built with many rules derived from the existing diagnosis methods and the expertise in fire investigation. The cause diagnosis system proposes the causes obtained from the diagnosis process and showed possibility of electrical fire causes.

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

  • Moon, Hyun-Wook;Lee, Ki-Yeon;Kim, Dong-Woo;Gil, Hyung-Jun;Kim, Hyang-Kon
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.25 no.12
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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.

Development of an Intelligent Program for Diagnosis of Electrical Fire Causes (전기화재 원인진단을 위한 지능형 프로그램 개발)

  • 권동명;홍성호;김두현
    • Journal of the Korean Society of Safety
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    • v.18 no.1
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    • pp.50-55
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    • 2003
  • This paper presents an intelligent computer system, which can easily diagnose electrical fire causes, without the help of human experts of electrical fires diagnosis. For this system, a database is built with facts and rules driven from real electrical fires, and an intellectual database system which even a beginner can diagnose fire causes has been developed, named as an Electrical Fire Causes Diagnosis System : EFCDS. The database system has adopted, as an inference engine, a mixed reasoning approach which is constituted with the rule-based reasoning and the case-based reasoning. The system for a reasoning model was implemented using Delphi 3, one of program development tools, and Paradox is used as a database building tool. To verify effectiveness and performance of this newly developed diagnosis system, several simulated fire examples were tested and the causes of fire examples were detected effectively by this system. Additional researches will be needed to decide the minimal significant level of the solution and the weighting level of important factors.