摘要
以具有代表性的某站二路(三相)电源同时断电无法正常切换的设备故障为例,对目前铁路信号供电配合方面存在的主要问题进行了全面分析。对于产生二路(三相)电源相位差过大或不稳定的原因、铁路信号电源屏二路电源切换电路存在的问题、产生的原因,以及铁路信号低压配电系统中各级各类保护之间的选择性配合,包括常用的熔断器、断路器组成的上下级间的配合原则及整定计算都有明确的论述。
In the case of two ways of three-phase power supplies breaking off simultaneously and failing to conduct normal changeover at a station,the author analyze major problems of the adaptability of railway signal power supply thoroughly and explained the causation of excessive phases differences or unstableness,the problems and the causation of two ways power supply switching circuit,and all the selective protections at any level in railway signal LV distribution system,including the fundamental principle and setting calculation between the upper level and lower level devices of common fuses and circuit breakers.
出处
《铁道通信信号》
2011年第8期5-8,共4页
Railway Signalling & Communication
关键词
铁路信号
供电配合
选择性
低压保护
相位差
Railway signal
Power distribution
Selective
LV protection
Phases differences
