LED LAMP FOR RAIL LIGHTS WITH REACTIVE-PULSED BALLAST Russian patent published in 2018 - IPC F21S8/00 

FIELD: electrical engineering.

SUBSTANCE: invention relates to the field of electrical engineering and is intended for use in automatic and semi-automatic blocking devices of railway transport, as a light source in signaling installations (traffic lights) of railway transport and underground, with control of working capacity in the switched on and off state. Technical result is achieved by a schematic and constructive solution of a traffic light rail lamp in which a capacitor and/or a shunt unit operating in a pulsed mode is used as a ballast. This circuit solution ensures the normal operation of the fire relay with minimal heat dissipation on the lamp, thereby limiting the active power of the lamp at a level of 1–3 W, while ensuring the operation of a traffic light with specified characteristics, as well as control of the lamp in the switched on and off state from the automation devices of the signal installation.

EFFECT: increase reliability and reduce the power consumption of a traffic light bulb.

16 cl, 1 dwg