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SB-1型闪光器系无接点闪光器件,是铁路平面交叉道口上的自动道口设备的一部分,由西安信号工厂研究所研制,已成批生产。其主要功能是控制道口信号机向铁路方向显示两个交替闪光的红色信号,禁止公路上的一切车辆、行人通行,以保证安全。当信号机灯泡(采用双灯丝灯泡)主丝断丝或闪光器的可控硅损坏时,能自动转换,点燃副灯丝,此时为一个或两个稳定的红色灯光,仍为禁止信号。
SB-1-type flash device is a contactless flash device, is a part of the automatic cross-rail crossing on the railroad crossing equipment developed by Xi’an Signal Factory Research Institute and has been mass-produced. Its main function is to control the crossing signal to the railway direction shows two alternately flashing red signal forbid all the vehicles on the road, pedestrian traffic, in order to ensure safety. When the signal light bulbs (with double filament bulbs) broken the main filament broken flash or SCR flash can be automatically converted to ignite the auxiliary filament, this time for one or two steady red light is still prohibited signal.