PROTECTION DEVICE input circuits and outdoor equipment of railway automatics lightning impulse current and overvoltage

摘要

Protection device input circuits and floor railway automation equipment from lightning impulse current and surge relates to electronics, in particular devices for protecting electrical circuits and floor railway automation equipment, and can be used to protect the installation wired communication systems and equipment of railway automation and robot and characterized in that the first protection stage is designed as a two chains, each of which consists of serially connected arrester and a varistor and is connected between the respective input terminal and the earth bar, the second stage is made of two chains, each of which consists of a series connected inductor and a capacitor and connected between the respective input terminal and a bus connectable to the ground bus, the inductors inductively coupled with one another, a compound of the throttle point and a capacitor of each circuit through the limiting resistor connected to the respective output terminal and the arrester terminal, the second terminal of the surge arrester of one of the chains By connecting the bus to the ground bus connectable between the output terminals included additional spark gap, the third protection stage is in the form of three voltage limiters, each of which is parallel to the respective arrester second protection stage