Electronic watthour meter circuit

Details Electronic watthour meter circuit Electronic watthour meter circuit

1976-10-29

1977-11-01

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural inputs

G01R 2106

Patent

active

040567745

ABSTRACT:
An electrical energy measuring circuit is responsive to two analog signals proportional to the voltage and current components of an electrical energy quantity to be measured. Voltage-to-frequency converters convert sampled DC voltages into first and second pulse trains having frequencies proportional to the peak voltage levels and the related levels of active or reactive current. A binary counter is incremented at a fixed rate by the sampling pulses. The binary counter is periodically reset by one of the pulse trains. The accumulated counter value is applied to a down binary counter which counts down at the frequency of the second pulse train. Borrow pulses are generated to provide an indication of electrical energy consumption.

REFERENCES:
patent: 3517311 (1970-06-01), Wasielewski et al.

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