The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 19, 2025
Filed:
May. 27, 2020
Hitachi Energy Ltd, Zürich, CH;
Stephane Isler, Faucigny, FR;
Hitachi Energy Ltd, Zürich, CH;
Abstract
An aspect of the present disclosure provides a method for measuring a quantity of liquid in a liquid-insulated electrical component. The liquid-insulated electrical component includes a main tank and an expansion tank fluidly connected to the main tank. The method includes measuring a first pressure of the liquid at a first point in the main tank, measuring a second pressure of the liquid at a second point in the main tank, the second point being at a height above the first point, measuring a third pressure of the liquid at a third point in the expansion tank, and determining the quantity of liquid in the liquid-insulated electrical component based on the first pressure, the second pressure and the third pressure. Further aspects provide a liquid-insulated electrical component, particularly a transformer, more particularly a traction transformer for a railroad vehicle, as well as a railroad vehicle including said liquid-insulated electrical component.