Self-powered electrical measuring system isolated from electrical perturbances
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United States of America Patent
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May 16, 1989
Grant Date -
N/A
app pub date -
May 1, 1987
filing date -
May 1, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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