Device for overvoltage protection by discharging of transient noise from power supply network, provides variable impedance that displace transient disturbances into non-conducting off state, when voltage from supply network is low

摘要

The device has a capacitor which is connected between the input terminals (E1,E2) of overvoltage protection element (1). Impedance (2) is in the series path between input terminal and output terminal (A) of power supply network. A controller (3) is connected to the impedance (2), such that the variable impedance is provided for displacing transient disturbances into a non-conducting off state, when a voltage from the supply network is set to be low.