Power monitoring

Details Power monitoring Power monitoring

1994-05-10

1995-11-14

Wieder, Kenneth A.

Electricity: measuring and testing

Testing and calibrating electric meters

324142, 324107, G06F 1546

Patent

active

054670128

ABSTRACT:
Electrical power monitoring apparatus comprises a loop and a first conductor. A current sensor coupled to the first conductor provides a current signal that is representative of the current in the first conductor. A voltage sensor coupled at least to the first conductor provides a voltage signal that is representative of the voltage on the first conductor relative to that on a reference terminal. A multiplier coupled to the current sensor and voltage sensor has a power output which provides a power signal that is proportional to the instantaneous value of electrical power carried by the first conductor. A calibration circuit in the loop has an input coupled to the power output and has an adjustable output. A current regulator in the loop has an input coupled to the adjustable output to maintain the current in the loop between predetermined minimum and maximum loop current values.

REFERENCES:
patent: 3286178 (1966-11-01), Ultcht
patent: 4989155 (1991-01-01), Begin
patent: 5079510 (1992-01-01), Komatsu
patent: 5124624 (1992-06-01), de Vries

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