Abstract: Measuring transducer for electric vehicles having at least one tap arranged to tap at least one AC measurement value in an AC charging circuit, a transformer arranged to convert a frequency of the AC measurement value into a standard frequency of an energy supply grid and to output at least one AC measurement value with the standard frequency in an AC measuring circuit, and at least one standard meter arranged in the AC measuring circuit for detecting an electrical power with the AC measurement value at the standard frequency.

Abstract: Measuring transducer for electric vehicles having at least one tap arranged to tap at least one AC measurement value in an AC charging circuit, a transformer arranged to convert a frequency of the AC measurement value into a standard frequency of an energy supply grid and to output at least one AC measurement value with the standard frequency in an AC measuring circuit, and at least one standard meter arranged in the AC measuring circuit for detecting an electrical power with the AC measurement value at the standard frequency.

Abstract: Charging station foundation having an inlet for a power supply line and a recess for receiving charging electronics, the inlet being guided from an outer wall of the foundation to an inner wall of the recess. In order to increase the reliability of charging infrastructure, it is provided that charging electronics at least comprising a circuit breaker and a charging controller protected according to protection class IPxy with x>=6 and y>=6, preferably y>=8 according to DIN EN 60529, are arranged in the recess.

Abstract: Charging station for electric vehicles with an induction coil arranged for inductive coupling with an induction coil of an electric vehicle, a grid connection point arranged for connection to an electrical grid, a meter arranged to obtain an electrical power flow from the induction coil to the grid connection point, and a processor. In order that an inductive feedback from an energy storage of an electric vehicle can take place in a grid compatible manner, it is provided that the processor generates at least one synchronization signal for the electric vehicle coupled to the induction coil for synchronization of the input voltage at the induction coil with a grid frequency at the grid connection point. Also provided are an electric vehicle and a corresponding system.