Lem Intellectual Property Sa

Lem International Sa

Gauthier Plagne

Christophe Delmaere

Jérémie Piro

Fluxgate based current transducer for measuring a primary current flowing in a primary conductor, comprising a fluxgate magnetic field detector and a measuring circuit. The fluxgate magnetic field detector includes an excitation coil driven by an oscillating excitation current (I) supplied by the measuring circuit. The measuring circuit is configured to provide a first and a second measurement output of the oscillating excitation current. The transducer further comprises a signal output processing unit for comparing in real-time the first and second measurements outputs, wherein the signal output processing unit is configured to send an error signal output if the difference between said first and second measurements outputs exceeds a tolerance value.

Fluxgate electrical current transducer

An electrical current transducer is disclosed including a primary conductor bar for carrying the current to be measured, a magnetic core comprising a magnetic circuit gap, a magnetic field sensor having a circuit board and a magnetic field detector positioned in the magnetic circuit gap, and an insulating housing surrounding the magnetic core and magnetic field sensor. The primary conductor bar has connection terminal ends extending outside of the housing configured for connection to an external primary conductor. The primary conductor bar further includes a core passage section having a reduced width in comparison to the connection terminal ends extending outside of the housing thereby providing an indent within which the magnetic field detector is positioned such that a central passage of the magnetic core has a width less than the width of the primary conductor connection ends. The insulating housing comprises a main housing portion overmolded around the core passage section of the primary conductor bar, the main housing portion comprising a magnetic field sensor receiving slot configured to allow slideable insertion of the magnetic field sensor into the primary conductor bar indent for positioning in the magnetic circuit gap.

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Saint-Julien-en-Genevois, France

Gauthier Plagne