Method and apparatus for determining a current in a conductor

Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system

Reexamination Certificate

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C702S065000, C324S200000

Reexamination Certificate

active

10845892

ABSTRACT:
The present invention provides a method of determining a current in a conductor. The method comprises the steps of determining the nthspatial derivative of at least one vector component of the magnetic field associated with the current at at least one position and calculating the current from the nthspatial derivative. The present invention also provides an apparatus for determining a current in a conductor. The apparatus comprises a means for determining at least one vector component of the magnetic field associated with the current at at least two different positions and a means for determining the nthspatial derivative of at least one vector component of the magnetic field from the or each vector component of the magnetic field measured at the at least two positions. The apparatus also comprises a means for calculating the current from the nthspatial derivative.

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