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Fire Science and Engineering 2009;23(2):62-66.
Published online April 30, 2009.
누전차단기 절연재료의 소손 특성에 관한 연구
이춘하, 김시국, 옥경재, 지승욱
1호서대학교 소방방재학과2호서대학교 소방방재학과3호서대학교 안전공학과4영남대학교 전기공학과
A Study on the Damage by Burning Characteristics of Insulating Materials of RCD
Lee Chun-Ha, Kim Shi-Kuk, Ok Kyung-Jae, Jee Seung-Wook
요약
본 연구는 국내에서 사용되고 있는 누전차단기 외함 절연재료의 소손 특성에 대하여 연구하였다. 시료는 3개 제조사의 누전차단기 외함 절연재료를 사용하였으며, 시료의 열분해특성, 연소특성, 트래킹 특성 등을 비교 분석하였다. 열분해특성은 TGA를 사용하였으며, 연소특성은 ISO5660(Fire Tests - Reaction to Fire, part 1)을 만족하는 Mass Loss Calorimeter(FTT 사)를 사용하였고, 트래킹 특성은 고체 절연재료의 내트래킹 및 비교트래킹 지수를 측정하는 실험인 KSC IEC 60112.의 기준에 따라 분석하였다. 연구결과 A제조사의 경우 내트래킹성이 가장 우수하였고, B제조사의 경우 내트래킹성이 가장 낮은 반면 $350^{circ}C$ 이상의 고온에서 열안정성이 가장 우수하였으며, C제조사의 경우 $400^{circ}C$ 이하의 온도에서 열안정성이 가장 우수한 것을 알 수 있었다.
Abstract
In this study, we study the damage by burning characteristics of insulating material of RCD (Residual Current Device) used in Korea. The insulating materials of RCD manufactured by three manufacturers are used as the sample. We compare and analyze the thermal decomposition characteristics, combustion characteristics and tracking characteristics of samples. The TGA and Mass Loss Calorimeter meeting the requirements for the ISO5660 (Fire tests-Reaction to Fire, part 1) are used for analyzing the thermal decomposition characteristics and combustion characteristics respectively. In addition, the tracking characteristics are analyzed according to standard of KSC IEC 60112 known as the test used for measuring the resistance tracking and comparison tracking indexes. The study results show that the resistance tracking property of insulating material provided by A Company is highest. Also, the test results show that the resistance tracking property of insulating material provided by B Company is lowest. However, the thermal stability of insulating material provided by this company is excellent at high temperature of above $350^{circ}C$. In addition, the test results show that the thermal stability of insulating material provided by C Company is highest at temperature of below $400^{circ}C$.
Key Words: Tracking, Insulating materials, RCD, Carbonic electric conductive pass


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