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.
On high voltage power lines the bare hand method is the commonly used live-line maintenance (LLM) working technology. In different standards and regulations different clearances can be found. Although the calculation of minimal approach distance is similar in each method, it depends on the magnitude of transient overvoltage. To limit the possible peak of overvoltage, portable protective air gap (PPAG)...
The main purpose of arc protection is the prevention of the initiation of an electric arc, and to decrease the emitted energy of the arc to the lowest possible level. If the hazard is not negligible, personal protective equipment must be used. In case of live-line maintenance (LLM) in high voltage (HV) systems, the use of personal protective equipment against arc is not common, but the chance of the...
The aim of this article is to present the operation and the potential benefits of the use of a portable protective air gap in the Hungarian transmission network. This equipment could extend the live work to those parts of the transmission grid, where the required clearances are currently not available according to the current national regulations. The article examines the usability of the device in...
The purpose of this paper is to examine the usability of portable protective air gaps in case of high voltage live-line maintenance in the Hungarian transmission network. After the examination of the characteristics of the network where the PPAG would be used, the operating range of the device has to be determined, then the gap distance has to be adjusted based on measurements with different voltage...
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.