Current intensity transformer device for measuring a variable electric current
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United States of America Patent
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-
Sep 8, 1992
Grant Date -
N/A
app pub date -
Apr 9, 1990
filing date -
Apr 13, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In the present current intensity transformer device, a magnetic circuit having an air-gap provided with a Hall cell, is coupled with a conductor for the current to be measured and with a measuring winding. An electric measuring circuit provides a first voltage which is a function of the magnetic field in the air-gap, and a second voltage which is a function of the current in the measuring winding. Both voltages are added together to provide a measure of variable currents, such as pulse currents or periodic currents of a strongly asymmetrical wave form, as well as direct currents or low frequency alternating currents with superposed strong high frequency undulation.
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