Patent ID: 8618789

Claim:
A method for current measurement in a multiphase current network, which has the following steps: detecting a first current value of a current flowing between a first phase of the multiphase current network and a first voltage potential at a first detection time; detecting a second current value of the current flowing between the first phase and the first voltage potential, at a second detection time, and the first detection time and the second detection time are selected such that the first current value and the second current value have different signs; and ascertaining a current value for the current from an average of the first current value and the second current value, wherein detection of the first current value and the second current value is done by means of a measuring device disposed between the first voltage potential and a plurality of first switches, and each phase of the multiphase current network is connected to the measuring device via a respective one of the plurality of first switches, wherein the measuring device includes a shunt resistor connected between the first voltage potential and the plurality of first switches through which the current flows, wherein each of the first switches is electrically connected to the shunt resistor, and wherein the first switch connected to the first phase is the only first switch closed at the first detection time such that the current flowing through the shunt resistor corresponds to the current flowing into the first phase and the first switch connected with the first phase is the only first switch opened at the second detection time such that the current flowing through the shunt resistor corresponds to the current flowing out of the first phase.