Device for measuring an electrical quantity of one phase of an AC electric current of an overhead electrical network
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United States of America Patent
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Jun 23, 2020
Grant Date -
Feb 14, 2019
app pub date -
Feb 10, 2017
filing date -
Feb 12, 2016
priority date (Note) -
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Abstract
The invention relates to a device for measuring an electrical quantity of one phase of an AC electric current in an overhead electrical network, comprising: a sensor designed to be attached to an electric line of the network, the sensor including: an electrically conductive plate; an electrical conductor, designed to electrically connect the plate to the line, in order to circulate a first current from the line through the conductor; a processing unit, designed to determine the electrical quantity from value values of the first electric current and a value of a capacitance between the plate and ground. The device also comprises a generator, electrically connected to the conductor and designed to inject a second current through the conductor, the second current having a frequency other than the frequency of the first current, the processing unit also being designed to calculate the capacitance between the plate and ground as a function of the second current.
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