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.
Voltage transformers which are the source of the signals for electrical power network protection apparatus through transformation of high voltages to low voltages enables accurate measurement of high voltages and estimation of the power quality in the power network. Significant is then accuracy of the instrument transformer both in steady and transient states which means permissible values of the...
Short transient states during interruptions and dips of the supply voltage of the voltage transformer are the cause of low power quality and source of impulsive conductive disturbances which are transferred to secondary side of the voltage transformer. Maximal values of these impulses are able to exceed even several times rated rms values of primary and secondary voltages. This may lead to abnormal...
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.