• Title, Summary, Keyword: electric shock

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A Study on the Protection of Electric Shock, in Low Voltage (저전압에서의 감전보호에 관한 연구)

  • 이재인
    • Journal of the Korean Society of Safety
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    • v.4 no.1
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    • pp.83-90
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    • 1989
  • Recently, due to the increase of 220V distribution lines and equipments preventive measures to cope with several kinds of electric accidents is revealed as an urgent problem. This study investigates the following matters; the cause and present condition of e1ectric shock accident, the influence of electric shock on human body, the safety limit of electric shock, the method of distribution voltage, the insulation of electrical load apparatus, the teachnics of electric shock prevention and foreign materials concerned with this subject etc. This paper present the fundamental cause of electric shock and syntbetic preventive counter measure of electric shock, too.

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Analysis of Electric Shock Accident on 4.16 kV Class Circuit breaker for Power Plant (발전소용 4.16 kV급 차단기에서 감전사고 사례 분석)

  • Park, Nam-Kyu;Song, Jae-Yong;Kim, Jin-Pyo;Goh, Jae-Mo
    • Journal of the Korean Society of Safety
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    • v.29 no.4
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    • pp.54-60
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    • 2014
  • This paper describes electric shock accidents on a 4.16 kV class circuit breaker for power plant. Electric shock accidents mostly involve damage of human life, in comparison with electrical fire, rate of human death tend to be higher in electric shock accidents. Specially, in a high voltage facilities rate of human death comprised about 43.7% by electric shock accidents. If electric shock accidents happen in a 4.16 kV class circuit breaker for power plant, then the power plant discontinue power production. Electric shock accidents in a power plant have a great ripple effect such as an electric power shortage. In this paper, we analyzed electric shock accidents on a 4.16 kV class circuit breaker for power plant. From the analysis results, we confirmed a cause of electric shock accidents on a 4.16 kV class circuit breaker, it happened by defect of interlock equipment or occurrence of breakdown between first feeder contactor and shielding plate. In order to reduce electric shock accidents on a 4.16 kV class circuit breaker, the power plant should consider improvement of interlock equipment and insulation of feeder contactor in circuit breaker.

A Study on Classification of Electric Shock Disasters and Countermeasures (전격재해의 유형 및 대책에 관한 연구)

  • 권영준;손병창;이명희;신승헌
    • Journal of the Korean Society of Safety
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    • v.15 no.4
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    • pp.47-55
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    • 2000
  • In this modern age which electric energy is the fundamental source of energy in the industry, electric shock disasters are unavoidable. Although numerous efforts, time, and money have been invested to prevent such electric shock disasters, the number of electric shock disasters are on the increase. In this study, models for equivalent electric circuit are developed for the different types of electric shock which are classified into three groups. The objective of these models is to calculate the electric current flowing through the body at the time of the shock. Based on the analysis, countermeasures to prevent the shock are suggested. The data used in this study are based on 28 actual incidents which occurred in the Daegu area during January of 1995 through June of 1999. The results of this study can be used as a technical manual for workers treating electrical facilities.

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The Characteristics of Electric Shock Accidents and Their Countermeasures for Portable Electrical Tools (이동형 전기기기의 감전재해 특성 및 그 대책)

  • Choi, Sang-Won
    • Journal of the Korean Society of Safety
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    • v.32 no.2
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    • pp.21-26
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    • 2017
  • According to the data of Korea Occupational Safety and Health Agency, electric shock accidents during recent 11 years exceeded more than 60% in architecture/other and construction work, the countermeasures for safety are required in the harsh environment of a construction site where moving electric machines and equipments are widely used. The establishment of countermeasure for insulation degradation and defect is required, in consideration of increasing trend for accidents caused by defective insulation among low voltage electrical installation each year. The aim of this study is to propose the policy about portable electrical tool standards and/or worker's safety standards for preventing electric shock accidents on safety workings, and is to develop the technology and the safety device to prevent electric shock for accident prevention reduction through experiments. It obtained the followings through this study; statistical data analysis of late about 10 years of electric shock-related industrial accidents analysis and portable electric tools; safety device development of 'device for testing continuous grounding and power shut-down' to prevent electric shock from portable electric tools. Furthermore, developed results and proposal in this study will help to prevent the electric shock accidents from portable electric tools and will be expected the utilization of policy formulation, educational data and field supplement of the safety device, and etc.

A Study on the Decreasing Method of Electric Shock Accident in the Construction Industry (건설업에서의 감전재해 감소 방안을 위한 연구)

  • Choi, Sang-Won
    • Journal of the Korean Society of Safety
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    • v.29 no.3
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    • pp.28-33
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    • 2014
  • Regarding the characteristics of fatal electric shock accident during the past 10 years, fatalities occurred more frequently in July & August, and AM 10-12 PM & 14-16. Also, the electric shock accident is occurred more frequently in the age group from 30 to 40. Especially, the fatal electric shock accident in construction industry covered more than half of total industry. Therefore, it is strongly requested for the protection technology of an electric shock from the low voltage electric path, grounding method and workers. The aim of this study is to propose the policy about the equipment performance standards and/or worker's safety standards to revise the standards for preventing electric shock accidents on safety workings.

Experiments to Simulate an Electric Shock Accident of a high Voltage using a Human Body Model (인체모형을 이용한 고전압(22.9[kV]) 감전사고 모의 실험)

  • Roh, Young-Su;Jang, Tae-Jun;Kwak, Hee-Ro
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.20 no.6
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    • pp.63-68
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    • 2006
  • Recent statistical data regarding electric shock accidents have been analyzed to examine the electric shock accidents occurred at the voltage of 22,900[V], In order to demonstrate the mechanism of the 22,900[V] electric shock accident, a number of experiments to simulate electric shock accidents have been performed based on the analysis results. In the experiment, the current flowing through a human body model was measured to quantitatively analyze the hazards of the simulated electric shock accidents in various situations. As a result of the experiment, it was shown that once an electric shock accident occurred the accident proved fatal to the human body, regardless of electric shock situation.

Hazard Assessment by Electric Shock both on the Ground and in the Water (지상과 수중에서 전격에 의한 위험성 평가)

  • Kim, Doo-Hyun;Kang, Dong-Kyu;Lee, Jong-Ho
    • Journal of the Korean Society of Safety
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    • v.19 no.2
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    • pp.26-33
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    • 2004
  • This study presents a hazard assessment of the human body exposed to electic shock considering various parameters which affect severity of the electric shock. The present study has two research objectives; one is no analyze hazards of the human body by the elctric shock both on the ground and in the water. The other is to understand the mechnism of the electric shock. In order to achieve these objectives the hazard of shock is estimated by comparing with physiological effects of electric curren througn the human body according to variation of shock parameters of shock circuits. The shock parameters adopted in this paper consist of body resistance, resistance of protective equipment, ground resistance, shock duration, depth of gound surface layer, relection factor, permissible touch voltage, body current and body voltage. Besides, safety standard determining hazard degree of the human body is introduced. And hazard of the human body due to the electric shock is quantitatibely assessed in consideration of data obtained by the method suggested herein, and final results are presented and discussed.

A Study on the In-depth Analysis of Cause and Characteristic for Recent Electric Shock Accident (최근 감전재해의 발생특성과 재해원인 분석연구)

  • Choi, Sang-Won
    • Journal of the Korean Society of Safety
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    • v.29 no.2
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    • pp.7-11
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    • 2014
  • The electric shock victims were predominantly male, and more than half of the victims were found in companies with less than five employees in terms of the scale of company, and also more than half of victims had less than one month of experience for work experience. Considering the category of industry, more than half of the victims were engaged in construction, and considering the subcategory of industries, more than 60% of electric shock victims were found in building and other construction works. This study intended to conduct an in-depth analysis on the cause of electric shock accidents to provide basic data for policy proposing taking into considering the characteristics such as the electric shock path, low voltage, grounding and protection of workers. Also this study conducted an in-depth analysis of electric shock accidents for the past eleven years taking into account the necessity of a long-term plan.

The Testing Methods of the Fire and the Electric Shock on the Electric Pad Using the House (가정용 전기매트에 대한 화재 및 감전 시험법에 관한 연구)

  • Jang, In-Hyeok;Lee, Chang-Hoon;Lee, Young-Joo;Lim, Houng-Woo
    • Journal of Applied Reliability
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    • v.14 no.3
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    • pp.169-175
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    • 2014
  • In this paper, the evaluating test methods of the fire and the electric shock on the Electric pad using the house is proposed. We analyzed electric pad using magnetic shielded type hot wire because electric pad using the magnetic shielded type hot wire generally be used in the home. We analyzed FMEA in order to analyze the mechanism of the fire and the electric shock of the electric pad and designed testing methods (Durability tests on the environment, Mechanical durability tests, Electrical durability tests) obtained through the two-step QFD and tested. We verified the evaluating test methods of the fire and the electric shock on the Electric pad using the house through the analysis of the test results.

A Study on the Characteristic of Electric-Shock Mechanism in the Water (수중에서의 감전 메카니즘 특성에 관한 연구)

  • Do, Bum-Sung
    • Journal of Korean Society of Hazard Mitigation
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    • v.7 no.5
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    • pp.111-118
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    • 2007
  • Recently electric shock accidents constantly occurs caused by the street lamps. Especially the chance of electric shock accident is high when the street lamp submerges by heavy rainfall. Electric shock accident occurs mostly on the low voltage facilities of 220V, but the awareness of its danger is insufficient. The electric shock accident by street lamp voltage of 220V is very dangerous because it is installed in the street which is easily in contact with people. But there are insufficient investigation concerning the affect to hwnan body of underwater electric potential distribution as the distance changes from the leakage object in case of short circuit. In this thesis, the analysis will be made on the affect of underwater Earth leakage to human body and electric potential distribution in underwater, and to draw a comparison between electric shock channel and electric shock mechanism by experimenting on the affect to human body of underwater electric shock as the distance changes from the leakage object.