关键词: 点灯电路, 接近信号机, 灯光转移, 点灯电流

Abstract:

For the automatic inter-station block section with a design speed of 120 km/h in the signal construction drawing of a station, the lighting circuit for the approach signal in this drawing is analyzed. When setting the straight receiving route going through the turnout, the home signal displays a yellow aspect and the approach signal displays a green and yellow aspect. When the train moves into the second approach section and the approach signal aspect changes from green and yellow to yellow, the filament

supervision relay (DJ) and the second fi lament supervision relay (2DJ) are energized at the same time, causing the lighting current of the approach signal to exceed the working current range of the fi lament relay. This poses a certain risk when using the approach signal.Therefore, it is necessary to optimize the design of the approach signal circuit. This paper analyzes the connection formulas of the signal lighting circuit in diff erent scenarios, simulates the signal aspects when the train enters the first and second approach sections, carries out comparative calculations, identifi es the key points of inconsistency, and provides solutions. 

Key words: lighting circuit, approach signal, changes in signal aspects, lighting current