Meter for accurately measuring integrated electric power

Details Meter for accurately measuring integrated electric power Meter for accurately measuring integrated electric power

1992-01-06

1994-05-10

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural inputs

324111, 364483, G01R 2106

Patent

active

053111176

ABSTRACT:
In a watt-hour meter in which first and second input signals representing an analog electric current and an analog voltage of an alternating current are converted into first and second digital signals, a first adder produces a sum signal which represents a sum of the first input signal and an additional analog signal of a frequency different from that of the first input signal and which is substituted for the first input signal. The meter may further comprise a second adder which adds another additional analog signal to the second input signal. Alternatively, the meter comprises low-pass filters and oversample-and-convert circuits to produce the first and the second input digital signals.

REFERENCES:
patent: 4451784 (1984-05-01), Milkovic
patent: 4456878 (1984-06-01), Gamoh
patent: 4514686 (1985-04-01), Mayfield

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