Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Magnetic saturation
Patent
1996-02-12
1998-02-10
Nguyen, Vinh P.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Magnetic saturation
324117R, 324126, G01R 1506
Patent
active
057173265
ABSTRACT:
A portable current measuring apparatus brings many current sensing devices close to a wire in order for the magnetic flux of the current within the wire to induce a current in the devices. The devices are arranged in a bridge circuit and connected with a signal source and a differential amplifier so that when the output of the devices is added by the amplifier the noise generated by magnetic sources is eliminated. The housing for the apparatus is small and light weight and includes a place for a portion of the current carrying wire to be positioned for current detection. Use of the apparatus does not require that the wire be cut, nor is it required that the apparatus become a permanent fixture of the circuit having the current carrying wire.
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Nguyen Vinh P.
Phung Anh
Siemens Terrance L.
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