Patent ID: 8294452

Claim:
An arrangement for measuring a current flowing in an electrical conductor, the arrangement comprising: a magnetic circuit having an air gap for coupling to the electrical conductor; a magnetic field-sensitive component arranged in the magnetic circuit and configured to measure a magnetic field generated by the electrical conductor; and first and second control cores arranged in parallel in the air gap, so that the electrical conductor can be situated between the control cores, wherein the control cores each comprise a control winding for magnetically saturating the respective control core, wherein the second control core is arranged parallel to the magnetic field-sensitive component; wherein the first and second control cores are independently controllable and are arranged so that the arrangement is configured to: measure flux density permeating the magnetic field-sensitive component when the control cores are unsaturated; and measure flux density permeating the magnetic field-sensitive component when the first core is saturated and the second core is unsaturated; and measure flux density permeating the magnetic field-sensitive component when the second control core is saturated and the first control core is unsaturated; and measure flux density permeating the magnetic fields sensitive component when both the first and second control cores are saturated.