Protection circuit e.g. overvoltage protection circuit, for protecting electronic circuit arrangement in motor vehicle, has fuse unit and circuit formed such that separation of arrangement from power supply unit is accomplished

摘要

The circuit has a fuse unit (TS) and a circuit (WS) that are formed such that a voltage pulse is generated in case of voltage reversal and overvoltage based on temporal current change arising at a connection of circuit and transmission ratio of transformers. The unit and the circuit are further formed such that a separation of electronic circuit arrangement from a power supply unit is accomplished based on the voltage pulse. An independent claim is also included for a method of protecting an electronic circuit arrangement before breakdown during voltage reversal of a connected power supply unit or during overvoltage.