Abstract: Device for protection against electric and/or magnetic fields, in particular electromagnetic fields, comprising a switch and a field coupled with the switch, wherein the switch has at least two protection elements, wherein a protection element comprises at least one film capacitor and at least one diode. The switch emits nature-like wave packets, generated by the diodes and capacitors by spontaneous discharges into the environment and the electric field of the power line, whereby the signals correspond to the electric discharges of AIS. A method for operating such a device is also provided.