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Fire Sci. Eng. > Volume 30(6); 2016 > Article
Fire Science and Engineering 2016;30(6):99-104.
DOI: https://doi.org/10.7731/KIFSE.2016.30.6.099    Published online December 31, 2016.
축사별 먼지 저항률에 따른 트래킹화재 위험성에 관한 연구
박광묵, 방선배, 김재현, 박진영
1한국전기안전공사 전기안전연구원
2한국전기안전공사 전기안전연구원
3한국전기안전공사 전기안전연구원
4한국전기안전공사 전기안전연구원
Study of the Tracking Fire Risk by Dust Resistivity of Pens
Park Kwang-Muk, Bang Sun-Bae, Kim Jae-Hyun, Park Jin-Yeong
1Korea Safety Research Institute
2Korea Safety Research Institute
3Korea Safety Research Institute
4Korea Safety Research Institute
요약
본 논문에서는 동식물시설 중 전기화재 비율이 높은 우사, 계사, 돈사에서 먼지샘플을 채취하여 증류수에 희석시킨 후 이 물의 저항률을 측정하고, 저항률에 따른 물의 온도변화 및 전류 측정실험, 트래킹 재현실험을 통해 축사별로 먼지에 따른 트래킹화재 위험성을 분석하였다. 분석결과 저항률 수치는 우사, 계사, 돈사 순으로 돈사가 가장 낮게 측정되었으며, 축사별 평균 값 역시 우사, 계사, 돈사 순으로 돈사가 가장 낮게 나타났다. 온도변화 및 전류 측정실험에서는 저항률이 낮을수록 물의 온도변화가 큰 경향을 보였으며, 전류 실효값 역시 높게 나타났다. 트래킹 재현실험에서도 저항률이 낮을수록 트래킹 진전속도가 빠르게 진행되었으며 착화시간이 단축되었다. 실험결과를 통해 도출된 결과를 가지고 축사별 먼지 저항률이 다른 이유를 고찰하였다.
Abstract
In animal and plant facilities, dust samples were collected from cattle sheds, pigsties and hen-houses, which have high proportion of electrical fires. The samples were diluted in distilled water and water resistivity was measured. Current measurements and tracking reappearance experiments were conducted using distilled water with dust samples. The analysis results were obtained to track the fire risks according to the dust resistivity. The highest value was the dust from cattle sheds followed in order by the dust of pigsties and hen-houses. In experiments measuring the temperature change and RMS current, the lower resistivity of water showed a significant trend of temperature and high amperage. In the tracking reappearance experiment with the lower resistivity water, the tracking speed was fast and the ignition time was shortened. This study investigated why each dust resistivity shows different results.
Key Words: Pen, Dust, Resistivity, Pigsty, Tracking fire


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