Patent ID: 8912786

Claim:
A method for determining a direct current flowing in a conductor during a process harnessing the direct current, the direct current having an amplitude greater than 500 A and being composed of a number of time-dependent partial currents flowing in first and second individual conductors having first and second switching elements, respectively, wherein at least one induced partial voltage is created by the partial current flowing in the first individual conductor by arranging at least one Rogowski coil around the first individual conductor, wherein each of the first and second individual conductors is formed by a respective path of a rectifier on a secondary side of a transformer with central tapping, and the induced partial voltage is integrated in at least one integrator and the direct current is determined with an evaluation unit connected to the at least one integrator, wherein during the process the partial current flowing in the first individual conductor is measured and becomes zero temporarily while partial current flows simultaneously in the second individual conductor, and wherein the at least one integrator is connected to the at least one Rogowski coil and is reset when the partial current in the first individual conductor is zero.