US 6,779,385 B2Granted

Method and device for monitoring moisture content of an immersed solid dielectric material

OwnerMichel Belangerinventor

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Abstract

A method and device for monitoring moisture content level of a solid dielectric material, or paper, immersed in a dielectric fluid, or oil, both of which having respective moisture content, and known water solubility properties varying with temperature. The device includes a moisture detector and a temperature detector for measuring moisture content level and temperature level of the oil, respectively. A microprocessor, electrically connected to both the moisture and the temperature detectors, computes the moisture content level of the paper. The microprocessor has the known water solubility properties of the paper and the oil stored therein and processes the oil moisture content level and the oil temperature level so as to determine the paper moisture content level. The latter being displayed on a display connected to the microprocessor.

Claims20

Dependent claims

A device for monitoring moisture content level of a solid dielectric material inside an enclosure, said solid dielectric material being immersed in a dielectric fluid, said dielectric fluid filling said enclosure, said solid dielectric material and said dielectric fluid having a respective moisture content, said solid dielectric material and said dielectric fluid having known water solubility properties varying with temperature thereof, said device comprising:

a moisture measuring means for measuring moisture content level of said dielectric fluid;
a temperature measuring means for measuring temperature level of said dielectric fluid;
and
an electronic circuit means for computing said moisture content level of said solid dielectric material, said electronic circuit means being electrically connected to both said moisture measuring means and said temperature measuring means, said electronic circuit means having said known water solubility properties of said solid dielectric material and said dielectric fluid stored therein, said electronic circuit means processing said fluid moisture content level and said fluid temperature level so as to determine said solid dielectric material moisture content level.

1 more element

A method for monitoring moisture content level of a solid dielectric material inside an enclosure, said solid dielectric material being immersed in a dielectric fluid, said dielectric fluid filling said enclosure, said solid dielectric material and said dielectric fluid having a respective moisture content, said solid dielectric material and said dielectric fluid having known water solubility properties varying with temperature thereof, said method comprising the following steps:

a) measuring moisture content level of said dielectric fluid using a moisture detector;
b) measuring temperature level of said dielectric fluid using a temperature detector;
and
c) computing said solid dielectric material moisture content level using a processor electronic circuit, said electronic circuit being electrically connected to both said moisture detector and said temperature detector, said electronic circuit having said known water solubility properties of said solid dielectric material and said dielectric fluid stored therein, said electronic circuit processing said fluid moisture content level and said fluid temperature level so as to determine said solid dielectric material moisture content level.

1 more element

Dependencies are inferred from the claim text.