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Metering and measuring point system for measuring and metering electrical energy/electricity and method

  • US 9,797,745 B2
  • Filed: 01/26/2016
  • Issued: 10/24/2017
  • Est. Priority Date: 11/25/2011
  • Status: Active Grant
First Claim
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1. A method for monitoring an inductive coupling of an electric vehicle with an inductive drawing or feeding device connected to a power grid, wherein the inductive drawing or feeding device is not provided with a current meter, the method comprising:

  • inductively coupling the electric vehicle with the inductive drawing or feeding device;

    measuring, at a connecting side of the inductive drawing or feeding device, at least one first physical parameter representing the electrical energy drawn off or fed in by the inductive drawing or feeding device;

    measuring, at a drawing off or feeding side of the inductive drawing or feeding device, at least one second physical parameter representing the electrical energy transmitted between the inductive drawing or feeding device and the electric vehicle;

    comparing the at least one first physical parameter measured at the connecting side of the inductive drawing or feeding device with the at least one second physical parameter measured at the drawing off or feeding side of the inductive drawing or feeding device; and

    disconnecting the inductive drawing or feeding device from the power grid if the compared at least one first physical parameter measured at the connecting side of the inductive drawing or feeding device deviates from the at least one second physical parameter measured at the drawing off or feeding side of the inductive drawing or feeding device in excess of a predetermined difference threshold level.

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