VOLTAGE SHUNT REGULATOR FOR THE PROTECTION OF AN ELECTRICAL LOAD FROM OVERVOLTAGES AND VOLTAGE TRANSIENTS

摘要

A voltage shunt regulator for the protection of an electrical load from overvoltages and voltage transients of a supply voltage is provided. The electrical load is connectable to a supply voltage source by an electrical line which includes a first and a second conductive line. The shunt regulator includes a power circuit block connectable between the first and the second conductive lines in parallel to the load. The power block can be activated to limit the voltage applied to the load to a safe voltage in case of overvoltages and voltage transients, and includes a switch circuit with trigger threshold connected in series to a voltage limiting circuit. The regulator also includes a circuit block for detecting the supply voltage and driving the power circuit block, connectable between the supply voltage source and the power circuit block.