Compensation current sensor arrangement

A current sensor arrangement according to the compensation principle comprising:

• a primary conductor that is designed to generate a primary magnetic field dependent on a current to be measured flowing through it, a first secondary winding that is designed to generate a first secondary magnetic field dependent on a first compensation current flowing through it, a second secondary winding that is designed to generate a second secondary magnetic field dependent on a second compensation current flowing through it, a magnetic field sensor that is designed to generate a measurement signal that represents a magnetic field detected by it, a magnetic core of soft magnetic material that is designed and arranged to connect a primary conductor, a first secondary winding, a second secondary winding, and a magnetic field sensor to each other, a first evaluation circuit, downstream from the magnetic field sensor and upstream from the first secondary winding, that is designed to generate a first compensation current corresponding to the measurement signal of the magnetic field sensor and thus feed the first secondary winding, and a second evaluation circuit, upstream from the second winding, that is designed to generate a second compensation current corresponding to the first compensation current, and thereby feed the second secondary winding, wherein:
• the magnetic field detected by the magnetic field sensor is the magnetic field in the magnetic core resulting from the superposition of the primary magnetic field, a first secondary magnetic field, and the second secondary magnetic field, the first compensation current and the second compensation current are set by the first evaluation circuit and the second evaluation circuit in such a manner that the resulting magnetic field detected by the magnetic field sensor becomes zero, the second compensation current is greater or smaller than the first compensation current and the first or second compensation current represents the current to be measured flowing in the primary conductor.