Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Magnetic saturation
Reexamination Certificate
2005-11-08
2005-11-08
Lefkowitz, Edward (Department: 2862)
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Magnetic saturation
C324S127000
Reexamination Certificate
active
06963195
ABSTRACT:
A current sensor assembly includes a sensor coil, an electrostatic shield coil, a core, a housing, and a magnetic shield. The sensing coil, electrostatic shield coil, core, housing, and magnetic shield can be of toroidal symmetry and arranged coaxially about a pair of primary current conductors. The conductors can be either asymmetric or symmetric with respect to the geometric center of the remaining sensor assembly. The core and a secondary winding make up a current sensor. The core is cylindrically shaped and fabricated of non-magnetic material. The secondary winding is wound over the cylindrical core to form a toroidally shaped winding. When assembled into the current sensor assembly, the core and windings are disposed around two single turn primary windings through which AC currents to be measured flow. Alternatively, the conductor can be flat and the sensor can be a solid state sensor that includes an electrostatic shield. The conductor can have a magnetic flux concentrator positioned about the conductor in the same region where the sensor is located.
REFERENCES:
patent: 4354154 (1982-10-01), Schiemann
patent: 4786862 (1988-11-01), Sieron
patent: 4791361 (1988-12-01), Beiloff et al.
patent: 5055771 (1991-10-01), Gamble et al.
patent: 5717326 (1998-02-01), Moriwaki
Cabou Christian G.
Lefkowitz Edward
Patnode Patrick K.
Zaveri Subhash
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