地铁电气火灾监控系统工程应用探讨

Analysis on engineering application problems of subway electric fire monitoring system

介绍了地铁中设置电气火灾监控系统的必要性,阐述了电气火灾监控系统的原理、系统组成、功能以及探测器的布置。结合贵阳轨道交通1号线电气火灾监控系统的实际应用,分析得出剩余电流互感器的穿线方式、N线与PE线的短接、双电源主备N线短接或混接以及双电源切换装置采用3P开关等,均是造成电气火灾误报警的主要原因。

Describes the necessity of setting up an electrical fire monitoring system,detailed discusses the principle,system composition,function and detector layout of the electrical fire monitoring system.Based on the practical application analysis of the electrical fire monitoring system of Guiyang Rail Transit Line 1,the threading mode of the residual current transformer,the short circuit of the N-line and the PE line,the short-circuit or mixed connection of the main power and standby N-line of the dual power supply,and the dual power supply switching device with 3P switches,etc.are the main causes of false alarms in electrical fires.