Single phase multi-wire electronic kwh meter

Details Single phase multi-wire electronic kwh meter Single phase multi-wire electronic kwh meter

G - Physics

01

R

324/70

G01R 21/06 (2006.01) G01R 21/127 (2006.01)

Patent

CA 1046585

ABSTRACT OF THE DISCLOSURE The metering of kWh in a single phase, three wire electrical system is accomplished by generating a first ana- log voltage which is representative of the voltage of the power consuming system. Second and third analog signals are generated which represent the current flowing through each of two of the three wires of the single phase power consuming system. The voltage representative analog signal is multiplied by each of the second and third current representative analog signals in a pulse width amplitude multiplying network. The output modulated pulse signals from the multiplier are summed and converted in, for example, a low pass filter to a signal having an amplitude representative of the power in the power consuming system. An analog-to-pulse rate converter is used fore converting the signal representing the average power to a series of output signals having a variable pulse repetition rate which is proportional to the average power.

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