Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Nonlinear
Patent
1989-05-08
1990-11-13
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Nonlinear
324103P, 324107, G01R 1902, G01R 1916
Patent
active
049704583
ABSTRACT:
A voltage-sensing circuit producing a voltage-indicating signal representative of the voltages in a three-phase AC system produces several voltage-indicating signals which are representative of the phase voltages in a three-phase AC system. These voltage-indicating signals are squared, and the squared voltages are summed to produce an output signal having a DC voltage component with a magnitude proportional to the Mean Square value of the AC phase voltages. Unbalanced voltages in the three-phase system can be monitored by detecting the peak value of a ripple voltage imposed on the DC voltage component of the output of the circuit.
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Eisenzopf Reinhard J.
Lenart R. P.
Nguyen Vinh P.
Westinghouse Electric Corp.
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