【摘要】 为了有效地监测煤矿井口低压电缆的电气火灾,研究设计了"多元化"的监测方案:1)继电保护(包括选择性漏电保护和过流保护),防止电气故障造成电缆发热而引发的内因火灾事故;2)感温火灾探测报警和感烟火灾探测报警或红外火灾探测报警,用于探测外部高温引发的初期火灾,并作为继电保护的后备保护;3)视频监控,作为值班人员用肉眼识别和确认火灾的直观手段。将3种方案有机的结合,通过试验样机的运行监测能够实现低压电缆电气火灾的有效监测,最后给出了实际的工程应用。更多还原

【Abstract】 A diversified project for electrical fire is proposed in this paper, in order to effectively monitor the electrical fire of low voltage cables in coal mine wellhead. Firstly, it is relay protection, to prevent fire accident caused by cable heating because of electrical fault. Secondly, it is temperature fire detection alarm, smoke fire detection alarm or infrared fire detection alarm, to detect initial fire caused by external high temperature, and to be the backup of relay protection. Thirdly, it is video monitoring, to provide basis of fire determination for the person on duty. To combine the three, can realize the effective monitoring of electrical fire. And it also gives practical engineering applications at last.更多还原