Techimp Technologies S.r.l.

GianCarlo Montanari

Stefano Serra

Andrea Cavallini

Fabio Ciani

A method for deriving the concentration of a gas dissolved in an electrical insulating oil () comprises the following steps:&#x2014;preparing a membrane () permeable to the gas, interposed between a container () of the oil () and a measuring chamber () that receives a part of the gas through the membrane ();&#x2014;measuring the value of gas concentration in the measuring chamber ();&#x2014;deriving an estimated value of the concentration of the gas in the oil () as a function of the measured value,&#x2014;the measuring step comprising taking at successive measuring instants a plurality of measurements of the values of gas concentration in the measuring chamber ();&#x2014;the deriving step comprising calculating the estimated value of gas concentration in the oil (), at an instant selected from said measuring instants, according to a non-linear function of the values measured at the selected measuring instant and at one or more of the measuring instants preceding the one selected.

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Casalecchio di Reno, Italy

GianCarlo Montanari