Device and method for measuring a current flowing in an electrical conductor
First Claim
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1. A device for measuring a current flowing in an electrical conductor, said device comprising:
- a magnetic circuit adapted to be coupled to an electrical conductor, the magnetic circuit having an air gap;
a magnetic field sensitive component disposed in the air gap to measure a magnetic field generated by the electrical conductor;
at least one control core having a control winding configured to control an effective length of the air gap when the control winding is energized; and
a compensation coil configured to magnetize the magnetic circuit.
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Abstract
A device for measuring a current flowing in an electrical conductor that has a magnetic circuit coupled to an electrical conductor. The magnetic circuit has an air gap and a magnetic field sensitive component disposed in the air gap to measure a magnetic field generated by the electrical conductor. At least one control core with a control winding is included to control an effective length of the air gap when the control winding is energized. The device also has a compensation coil to magnetize the magnetic circuit.
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Citations
25 Claims
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1. A device for measuring a current flowing in an electrical conductor, said device comprising:
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a magnetic circuit adapted to be coupled to an electrical conductor, the magnetic circuit having an air gap; a magnetic field sensitive component disposed in the air gap to measure a magnetic field generated by the electrical conductor; at least one control core having a control winding configured to control an effective length of the air gap when the control winding is energized; and a compensation coil configured to magnetize the magnetic circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 22, 23, 24, 25)
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14. A method for measuring a current flowing in an electrical conductor, the method comprising:
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providing a device that comprises; a magnetic circuit adapted to be coupled to an electrical conductor, the magnetic circuit having an air gap; a magnetic field sensitive component disposed in the air gap to measure a magnetic field generated by the electrical conductor; at least one control core having a control winding configured to control an effective length of the air gap when the control winding is energized; and a compensation coil configured to magnetize the magnetic circuit; and energizing the compensation coil with a first polarity magnetization; measuring a first current through the electrical conductor; energizing the compensation coil with a second polarity magnetization; and measuring a second current through the electrical conductor. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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Specification