Self-powered electrical measuring system isolated from electrica

Details Self-powered electrical measuring system isolated from electrica Self-powered electrical measuring system isolated from electrica

1987-05-01

1989-05-16

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With coupling means

324 96, 324126, G01R 1900, G01R 120

Patent

active

048313270

ABSTRACT:
A self-powered electrical measuring system for measuring current in a high voltage circuit. The system utilizes a Rogowski coreless coil disposed about a conductor for sensing current flowing in the conductor and producing a voltage signal proportional to the magnitude of the current. An electronic conditioning circuit is provided for conditioning the voltage signal for transmission by optical link means to a remote receiver operating which is at ground potential and totally isolated from the measuring system in the high voltage circuit. A floating supply circuit uses a tapping coil, having a magnetic core disposed about the conductor, whereby to produce a supply voltage for the electronic conditioning circuit.

REFERENCES:
patent: 2724821 (1955-11-01), Schweitzer, Jr.
patent: 4070572 (1978-02-01), Summerhayes
patent: 4158810 (1979-06-01), Leskovar
patent: 4361742 (1982-11-01), Kashiwagi et al.
patent: 4497990 (1985-02-01), Peche et al.
patent: 4584523 (1986-04-01), Elabd
patent: 4616176 (1986-10-01), Mercure et al.
patent: 4618750 (1986-10-01), Ziickler
patent: 4635055 (1987-01-01), Fernandes et al.
patent: 4709339 (1987-11-01), Fernandes

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