High current measuring sensor - includes magnetic field detector in air gap of magnetic circuit surrounding current carrying cable

摘要

The electric current sensor includes a magnetic circuit (22) coupled to a primary conductor (1) with a measuring coil (2) connected to a current source by a corresponding control circuit. The magnetic circuit provides an air gap (23) in which there is a magnetic field sensor (3) electrically connected to the input of the control circuit which controls a magnetic field compensation current. A printed circuit is used to minimise the interaction between the measurement current and the control circuit. ADVANTAGE - Measurement of large currents using small appts. with improved performance.