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.
Sulfur hexafluoride (SF6) is one of the most commonly used insulating mediums in high-voltage electrical equipment. It is known that SF6 can decompose to lower fluorides of sulfur under electrical discharge, and then these lower fluorides of sulfur will oxidize in the presence of water vapor and oxygen, resulting in the formation of decomposition by-products. Among electrical discharge, spark discharge...
In order to solve the problem that antennas on vessel easily arises machinery fault, translation-invariant multiwavelets denoising using neighboring coefficients is researched and applied to diagnosis for failure of satcom antenna. Neighboring coefficient denoising considering relativity of coefficients is introduced to translation-invariant multiwavelets domain to take advantage of excellent properties...
Aiming at the problem that the bearings of antenna drive organ on vessel easily occur failure, fault diagnosis method of bearing based on second generation wavelet packets is researched. First, original libration signal is decomposed using second generation wavelet packets and reconstructed by frequency band. Decibel value of Hilbert envelope spectrum for each band is calculated. Then, Decibel value...
As the increasing demand for large capacity, high voltage and high reliability power transformers in urban power grid, oil-free, non-flammable and non-explosive equipment is recommended. For this reason, evaporative cooling transformers, gas insulated transformers and other electrical equipment using fluorocarbon as coolant and dielectric have been developed. This paper presents an experimental survey...
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.