The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In order to investigate the electrostatic charging tendency (ECT) of transformer oil under thermal aging and understand its correlations to the other insulation parameters, a series of accelerated aging tests were carried out on two types of mineral insulation oils, A and B, both of which were mainly used in 500 kV power transformers in China. Oil samples were pre-processed by degassing and dehydrating,...
This paper is aimed at evaluation about aging properties of cellulose paper used for insulating of oil-filled transformer and analysis on correlation between mechanical characteristic such as tensile strength and chemical characteristics such as CO, CO2 gas and furfural when cellulose paper is aged by thermal. For experiment the accelerated aging cell has been manufactured, it has been aged during...
A series of accelerated aging tests of high voltage transformer oil from Karamay of China were completed. All the oil samples were processed by dehydration and degasification firstly, and added with different contents of oxygen and copper, then aged under 120degC in different periods up to 675 hours, which is equal to 30 years on service of transformer oil. Improved mini-static tester was adopted...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.