Power measuring apparatus

Details Power measuring apparatus Power measuring apparatus

1980-04-24

1982-09-07

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With coupling means

336 20, 336208, G01R 120, H01F 2730

Patent

active

043486380

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 current through the load. Tuned amplifiers of narrow band pass amplify the signals before they are fed to a square low multiplier means including photooptical devices.

REFERENCES:
patent: 2950489 (1960-08-01), Pattison
patent: 3434052 (1969-03-01), Fechant
patent: 4161692 (1979-07-01), Tarzwell

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