Abstract: An electronic circuit arrangement for an electric charging station and a method for configuring a an electrical frequency filter device of an electronic circuit arrangement are disclosed. The electronic circuit arrangement includes an electrical pilot contact and an electrical earth contact, to which an electric motor vehicle for forming an electrical communication connection are electrically connectable. An electrical oscillator, for generating a pulse width modulated electrical communication signal, is arranged in an electrical line path and subdivides the line path into a pilot portion ending in the pilot contact and an earth portion ending in an earth contact. A frequency filter device is arranged in the pilot portion of the line path.

Abstract: A charging plug for a charging cable for an electric vehicle is disclosed. The charging plug includes a charge indicator provided on the charging plug. The charge indicator is configured such that it indicates a charging progress. The charging plug is used, e.g., in connection with a charging station for an electric vehicle.

Abstract: A method for operating a charging station for vehicles may include suppling the charging station with electric energy via a multiple phase supply system, providing, by the charging station, multiple phase lines for an electric power supply of vehicles, supplying a vehicle a charging current via a phase line, measuring at least one supply system voltage that is present on the phase line that supplies the vehicle with the charging current, comparing the measured at least one supply system voltage and a stored rated voltage range, and adjusting the charging current if the measured at least one supply system voltage is outside the stored rated voltage range.