Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural inputs
Patent
1982-12-20
1985-06-25
Levy, Stewart J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Plural inputs
324117H, 324127, G01R 2100, G01R 2108
Patent
active
045256691
ABSTRACT:
A system for measuring power in an electrical distribution circuit having at least three wires includes a Hall-effect generator directly coupled to one of the live wires of the circuit and current transformers coupled to the other live wires of the circuit. The output of each current transformer is magnetically linked to the Hall-effect generator. The excitation current for the Hall-effect generator is derived from the line potential between the live wires. The Hall-effect generator acts to produce an output whose magnitude is directly proportional to the product of the vector sums of the currents flowing in the live wires and the potential between the live wires. This power indicative output may be accumulated to produce an indication of energy consumed by a load connected to the live wires. A high frequency A.C. bias is applied to the Hall generator in order to linearize the output of the generator.
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C. Lowman, "Magnetic Recording", 1972, pp. 69-75.
Holberton Philip M.
Marshall Jay K.
Randall Bruce E.
Baker S.
Gaudier Dale
Levy Stewart J.
Sangamo Weston, Inc.
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