• 조명전기설비학회논문지
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• 제28권12호
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• pp.30-37
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• 2014

Recently, Concerns of imbalance for power supply has been raised by the increase of electric power consumption, but the interest of electric safety is still lacking due to the incompleteness of regulations. Particularly, Arcing fault, direct cause of electric fire accidents, is difficult to detect, interrupt due to unformal signal behaviour in previous research and apply to real system. In this paper, Arcing fault simulator device was fabricated to investigate the characteristics of series arcing fault and simulated the faults in various real load. Also, this study are analysed arcing fault signal by using the harmonic analysis of the acquired data from the current of the power supply and proposed the methods to prevent the series arcing fault accidents in advance.

• 전기학회논문지
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• 제57권3호
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• pp.494-500
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• 2008

This paper presents the analyzed result of the series arc fault current by using the discrete wavelet transform. The series arcing is caused by a loose connection in series with the load circuit. The series arc current is limited to a moderate value by the resistance of the device connected to the circuit, such as an appliance or a lighting system. The amount of energy in the sparks from the series arcing is less than in the case of parallel arcing but only a few amps are enough to be a fire hazard. Therefore, it is hard to detect the distinctive difference between a normal current and a intermittent arc current. This paper, presents the variation of the ratio of peak values and RMS values of the series arc fault current, and proposes the novel series arc fault detecting method by using the discrete wavelet transform. Loads such as a CFL lamp, a vacuum cleaner, a personal computer, and a television, which has the very similar normal current with the arc current, were selected to confirm the novel method.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 춘계학술대회 논문집 전기설비전문위원
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• pp.205-207
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• 2009

In 2007, 9,128 fires are attributed to electrical equipments. These fires resulted in 29 deaths and 262 injuries. Arc-faults were one of the major causes of these fires. When an unintended arc-fault occurs, it generates intense heat that can easily ignite surrounding combustibles. Conventional circuit breakers only respond to overloads, short circuits, and leakage currents. Therefore, the breakers do not protect against arcing conditions. This paper presents results obtained in experiments on ignition behavior of wire by series arc fault currents and techniques developed to detect the arc-faults. The developed technique was tested after installation to make sure they are working properly and protecting the circuit. If the developed arc detecting technique is applied, the electrical fires caused by an arc-fault can be reduced.

• 한국산학기술학회논문지
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• 제10권8호
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• pp.1810-1816
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• 2009

2007년도에 9,128건의 화재가 전기적인 원인에 의해서 발생되었고, 이들 화재에 의해 사망 29명과 부상 262명의 인명피해가 있었다. 아크고장은 전기화재의 주요 원인의 하나로, 일반적으로 높은 열을 발생시키며 쉽게 주변의 인화성물질을 점화시킨다. 그러나 기존의 차단기는 과전류, 단락전류, 누설전류에 대해서만 동작하기 때문에, 이에 대해서는 현재 특별한 보호책이 없는 실정이다. 본 논문은 직렬아크 고장전류에 의한 전선의 발화특성에 대한 실험에서 얻어진 결과를 통해 UL에서 제안하고 있는 기준이 국내의 현실에 적절하지 않음을 제시하였고, 이 결과를 기초로 개발된 기술의 동작특성 실험을 실시하여 아크고장회로를 보호할 수 있는지에 대한 신뢰성을 확인하였다. 모의실험을 통한 동작특성 분석결과, 개발된 아크고장 검출 기술을 적용하면 전기화재의 주요원인인 아크고장에 의한 화재를 현저히 저감시킬 수 있을 것으로 판단된다.