THE IMPULSE CHARACTERISTICS AND ELECTRIC STRENGTH OF VARISTORS PILES DEPEND ON GEOMETRY OF THE ELECTRODES
Journal Title: Informatyka Automatyka Pomiary w Gospodarce i Ochronie Środowiska - Year 2014, Vol 4, Issue 3
Abstract
The paper describes the results of the impulse characteristics and electric strength measurements of the pile of varistors with modified side surface. Basing on the impulse voltage tests on the surge arresters it was found that one of the reasons of the failures of these devices may be the surface discharge at the varistor - insulating housing phase boundary, through the gas between them. Flashover voltage of power protecting systems can be increase by applying of semi – conducting covers which will carry away the generated surface charge and uniform the distribution of electric fieldon material surface. Comparing two types of electrodes configuration on varistors, it was found that systems without gap between electrode and side surface of varistor exhibited higher values of withstanding voltage whether their side surfaces were covered or not covered with insulatingor semiconducting layer.
Authors and Affiliations
Krzysztof Kogut, Beata Zboromirska–Wnukiewicz
Keywords
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- EP ID EP73192
- DOI 10.5604/20830157.1121330
- Views 95
- Downloads 0
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