Arrangement for measuring an electrical power or energy

Details Arrangement for measuring an electrical power or energy Arrangement for measuring an electrical power or energy

1990-03-23

1991-07-16

Strecker, Gerard R.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Polyphase

324142, 324103R, G01R 2106, G01R 1132

Patent

active

050327852

ABSTRACT:
In an arrangement for measuring an electrical power or energy, for each of a plurality of phases, the arrangement includes a voltage input in a transformer supplied with current and connected to an integrator with a high ohm input. Each transformer is connected via an integrator with a high ohm input to a mark-space-amplitude modulator, one of which is provided per phase. Each voltage input is also in communication with the corresponding mark-space-amplitude modulator. Each mark-space-amplitude modulator comprises a mark-space modulator and a pulse amplitude modulator. Each pulse amplitude modulator is provided with two push-pull outputs, each of which is connected to an input of a current/frequency converter for the integration of marks (pulses) and spaces (i.e. spaces between pulses) present at the output of the pulse amplitude modulator. The current/frequency converter is connected to processing and display circuitry for displaying an output.

REFERENCES:
patent: 3602843 (1971-08-01), De Vries
patent: 4315212 (1982-02-01), Gamoh
patent: 4356446 (1982-10-01), Battocletti
patent: 4378524 (1983-03-01), Steinmuller
patent: 4408283 (1983-10-01), Kovalchik et al.
patent: 4434400 (1984-02-01), Halder et al.
patent: 4456878 (1984-06-01), Gamoh
patent: 4463311 (1984-07-01), Kobayashi
patent: 4475081 (1984-10-01), Kobayashi

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