Power measuring apparatus

Details Power measuring apparatus Power measuring apparatus

1978-07-17

1980-11-25

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural inputs

324127, 364845, G01R 2106, G01R 2900

Patent

active

042361125

ABSTRACT:
Apparatus for measuring power consumed by a load connected via mains to a source of alternating current having a given fundamental frequency includes means for generating a first signal proportional to the instantaneous voltage across the load and a transformer secondary toroidally wrapped around one of the mains for generating a second signal proportional to the instantaneous voltage through the load. Tuned amplifiers of narrow band pass amplify the signals before they are fed to a square law multiplier means including photooptical devices.

REFERENCES:
patent: 3434052 (1969-03-01), Fechant
patent: 4056774 (1977-11-01), Shum
patent: 4161692 (1979-07-01), Tarzwell
Schwartz et al., "A Wideband Wattmeter. . . ;" IEEE Trans. On Electron Devices, v. Ed. 17, No. 9, Sep. 1970, pp. 750-755.

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