避免火灾报警系统因强电干扰发生故障报警的改进措施
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摘要
针对城市轨道交通工程中火灾报警系统(FAS)与被控设备之间的接口设计,因控制信号采用被控设备方提供的AC 220 V强电工作电压而导致FAS受到电磁干扰,进而产生系统故障报警的情况,提出两种接口设计改进方案。即:在FAS所有的输入模块前端增设隔离继电器方案,以及FAS通过输出模块提供DC 24 V有源常开触点控制风机启停的方案。
The interface design between fire alarm system(FAS) and the controlled equipment of urban rail transit project are introduced. Since the control signal that adopts AC 220 V strong power working voltage provided by the controlled equipment, FAS is disturbed by electromagnetic interference and leads to the fault alarm, two improvement schemes for the interface are proposed. One scheme is to add the isolation relay at the front end of all FAS input modules, another is to provide DC 24 V active normal open contact control for fan startup and shutdown through the output module.
The interface design between fire alarm system(FAS) and the controlled equipment of urban rail transit project are introduced. Since the control signal that adopts AC 220 V strong power working voltage provided by the controlled equipment, FAS is disturbed by electromagnetic interference and leads to the fault alarm, two improvement schemes for the interface are proposed. One scheme is to add the isolation relay at the front end of all FAS input modules, another is to provide DC 24 V active normal open contact control for fan startup and shutdown through the output module.
引文
[1] 中华人民共和国住房和城乡建设部,中华人民共和国国家质量监督检验检疫总局.地铁设计规范:GB 50157―2013 [S].北京:中国建筑工业出版社,2013:192-193.
[2] 屈静.西安地铁2号线火灾自动报警系统及其接口设计[J].现代城市轨道交通,2011(1):37.
[3] 张道,付文刚,崔成剑.地铁火灾自动报警系统设计与应用[J].城市轨道交通研究,2013(11):71.
[2] 屈静.西安地铁2号线火灾自动报警系统及其接口设计[J].现代城市轨道交通,2011(1):37.
[3] 张道,付文刚,崔成剑.地铁火灾自动报警系统设计与应用[J].城市轨道交通研究,2013(11):71.