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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。
Taking a representative equipment failure of two-way (three-phase) power supply of a certain station that can not be switched normally when the power is cut off at the same time as an example, a comprehensive analysis is made of the main problems in the current power supply coordination of the railway signal. For the reason that the phase difference of the two-way (three-phase) power supply is too large or unstable, the existing problems of the two-way power switching circuit of the railway signal power screen, the reasons for the problems and the protection of all kinds of protection at all levels in the railway signal low-voltage power distribution system Between the selective cooperation, including the commonly used fuses, circuit breakers composed of the principle of coordination between upper and lower levels and tuning calculations are clearly discussed.