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.
Electrical machines' composite insulations conditions can be characterized by the values of the dielectric properties. In this paper, an experimental study of the variation of these properties with temperature and applied electric field frequency are presented. The tests were done on plane samples and bars containing CALMICAGLAS, made of glass texture (13 %), mica paper (47 %) and epoxy resins (40...
The use of absorption/resorption currents to characterize the ageing state of electrical equipmentspsila insulation systems is well known. The maximal values and the slopes of these currents give important information regarding the paper-oil insulations for power transformers and energy cables, but these are also used for insulation systems of medium and/or high power machines. In general, the values...
The safe operation and the extension of the remained life of power transformers have been dominant objectives during the last years. An accurate assessment of the remained life could be an important instrument for the safety of the power transformers in operation. The paper presents the structure and the using mode for an integrated monitoring-diagnosis system (SMD) for power transformers. The monitoring-diagnosis...
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.