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:
May. 05, 2015
Filed:
Oct. 28, 2010
Gunnar Andersson, Nyhammar, SE;
Bengt-olof Stenestam, Ludvika, SE;
Gunnar Andersson, Nyhammar, SE;
Bengt-Olof Stenestam, Ludvika, SE;
ABB Technology Ltd., , CH;
Abstract
A method for determining the relative humidity of an insulating liquid filled electric apparatus including a container containing insulating liquid and gas, a communication unit providing communication between the gas of the container and gas of an external environment, and providing dehydration of gas passing through the communication unit, wherein the method includes: continuously measuring and storing the relative humidity of the gas in the container, calculating an average value of the relative humidity in the gas based on the stored humidity measurements during a certain time period, and determining the relative humidity of the insulating liquid based on the average value of the relative humidity in the gas and a relationship between the relative humidity of the gas and the relative humidity of the insulating liquid at equilibrium.