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.
Multipoint grounding of transformer core is one of the common faults of transformer. In this paper, a transformer was detected by the electrical performance tests and gas chromatography experiment. Based on this failure, the finite element analysis was carried out to quantify the effects of various parameters on the fault. Finally, this paper summarized the basic theory of quantitative analysis and...
Transformer winding temperature is a function of the load current and ambient temperature. As the maximum winding temperature at steady state operation is limited by IEEE/IEC standards, the higher the ambient temperature, the lower the permitted current. When the high temperature warning forecast from government climatological stations is available, the maximal load can be pre-calculated and, if necessary,...
Numerous studies have been carried out on the ageing of Kraft paper used in transformer insulation, especially on the production rate of the ageing by-products such as 2-furfural and CO2, which were then used as the index to infer the status of ageing of the transformer insulation. However, as this study found out, the ageing of pressboard produces the same byproducts at a much higher rate under exactly...
This paper presented four cases of online/offline partial discharge (PD) diagnosis in various scenarios. Some case gave strong evidence of PD occurrence but no discharge signal was detected. Some case gave obvious PD signal pattern, which was identified as noise. In the last case, a small PD phenomenon was identified and located by a combination of several diagnostic methods, including dissolved gas...
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.