Basic emergency power sources for railway traffic control devices

Power outages and power quality deviating from accepted standards are the primary drawbacks threatening the proper operation of railway traffic control (RTC) devices, and consequently, the safety of passengers.The required voltage values are obtained directly from the power supply network, which provides energy through a system of traction substations or, in the event of a failure, through voltage transformation from an external source, e.g., from buffer-charged battery sets. The article focuses on the basic emergency power supply devices for RTC systems, which include batteries, UPS units, and power generators. The technical and functional characteristics of these devices are presented. The correct functioning of railway traffic control devices, which have a direct impact on human safety, depends to a large extent on the quality and continuity of their electrical power supply. (…)

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