主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2022, Vol. 41 ›› Issue (6): 860-863.

• • 上一篇    下一篇

低压电路接触不良断路电弧引燃能力实验研究

王伟峰1,2,3，刘 强1,2,3，张方智1,2,3，纪晓涵1,2,3   

  1. （1.西安科技大学 安全科学与工程学院，陕西 西安 710054； 2.陕西省工业过程安全与应急救援工程技术研究中心，陕西 西安 710054； 3.西安科技大学 城市公共安全研究所，陕西 西安 710054）
  • 出版日期:2022-06-15 发布日期:2022-06-15
  • 作者简介:王伟峰（1982-），男，河南沈丘人，西安科技大学城市公共安全研究所副所长，高级工程师，博士，主要从事安全物联网、城市公共安全等方面的研究与教学工作，陕西省西安市碑林区文艺街道雁塔中路58号西安科技大学雁塔校区，710054。
  • 基金资助:
    国家重点研发计划项目（2021YFE0105000）；国家自然科学基金项目（52074213）；陕西省重点研发计划项目（2021SF-472）；榆林市科技计划项目（CXY-2020-036）

Experimental research on arc ignition ability of low-voltage circuit with poor contact

WANG Wei-feng1,2,3, LIU Qiang1,2,3,ZHANG Fang-zhi1,2,3, JI Xiao-han1,2,3   

  1. (1. School of Safety Science and Engineering, Xi'an University of Science and Technology, Shaanxi Xi'an 710054, China; 2. Shaanxi Industrial Process Safety and Emergency Rescue Engineering Technology Research Center, Shaanxi Xi'an 710054, China; 3. Institute of Urban Public Safety, Xi'an University of Science and Technology, Shaanxi Xi'an 710054, China)
  • Online:2022-06-15 Published:2022-06-15

摘要： 摘 要：针对家庭低压电弧引发火灾原因多发、引火机理不明等问题，利用电气火灾原因多发与防控装置模拟接触不良故障，研究系统功率和功率因数及碳电极直径对低压接触不良电弧引燃能力的影响。结果表明：系统功率≤320 W时，滤纸仅出现变黄、炭化现象，当系统功率＞370 W时，滤纸开始被引燃，且引燃概率随系统功率增大而增大，功率≥480 W，时滤纸均能被引燃；实验条件下电弧功率随功率因数减小而减小；直径对电弧的引燃能力的影响主要取决于阳极光斑大小，当阳极光斑＞碳电极直径时，滤纸均可被引燃；反之，滤纸几乎不能被引燃。研究结果对低压用电防火及电气故障预防提供了一定的基础参数与理论依据。

关键词: 关键词：故障电弧, 引燃能力, 功率因数, 过零, 阳极斑点

Abstract: Abstract: In view of the frequent fire caused by low-voltage arcs and unclear ignition mechanism, simulate the poor contact fault with the multiple electrical fire causes and prevention device, and study the influence of system power and power factor and carbon electrode diameter on the ignition ability of low-voltage poor contact arcs. The results show that when the system power is no more than 320 W, the paper filter only turns yellow and being carbonized. When the system power is more than 370 W, the paper filter starts to be ignited, and the ignition probability increases with the increase of the system power, and when the power is no less than 480 W, the paper filter can be ignited; the power of the arc decreases with the decrease of the power factor under the experimental conditions; the influence of the diameter on the ignition ability of the arc mainly depends on the size of the anode spot, when the anode spot is larger than the diameter of the carbon electrode, the paper filter can be ignited; on the contrary, the paper filter can hardly be ignited. The research results provide certain basic parameters and theoretical basis for the fire prevention of low-voltage electricity use and the prevention of electrical faults.

Key words: Key words: fault arc, ignition capability, power factor, zero crossing, anode spot