Szczegóły publikacji
Opis bibliograficzny
Influence of temperature and high-energy stresses on selected wideband characteristics of metal-oxide varistor parameters / Michał BONK, Łukasz FUŚNIK, Bartłomiej SZAFRANIAK, Paweł ZYDROŃ // W: Elektroenergetika 2017 [Dokument elektroniczny] : proceedings of the 9th international scientific symposium on Electrical power engineering : Stará Lesná, Slovak Republic, September 12–14, 2017 / eds. Michal Kolcun, Iraida Kolcunová, Juraj Kurimský ; Technical University of Košice. Faculty of Electrical Engineering and Informatics. Department of Electrical Power Engineering. — Wersja do Windows. — Dane tekstowe. — Košice : Technical University, cop. 2017. — Dysk flash. — e-ISBN: 978-80-553-3195-9. — S. 306–310. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 310, Abstr.
Autorzy (4)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 108419 |
|---|---|
| Data dodania do BaDAP | 2017-09-28 |
| Rok publikacji | 2017 |
| Typ publikacji | materiały konferencyjne (aut.) |
| Otwarty dostęp |  |
| Konferencja | Elektroenergetika 2017: 9\textsuperscript{th} international scientific symposium on Electrical power engineering |
Abstract
Gapless Metal-Oxide Varistors (MOV) are used for many years in systems limiting the surges arising in electrical power networks, at all voltage levels. Surge arresters used for protection of electrical installations and devices are currently produced mainly on the basis of ZnO varistors. Each overvoltage causes high energy stress, which degrades the internal structure of the varistor. As a result, it changes its properties, and by cumulative effects of aging processes reduces the lifetime. Diagnosis of surge arresters is performed to determine the degree of aging of their varistors structures. For this purpose, different testing methods are used. The paper describes issues related to the application of wideband impedance spectroscopy (IS) for the experimental determination of some electrical and material parameters of low voltage surge arresters, subjected to the influence of aging factors. They are illustrated with results of tests performed to determine the effect of temperature and high energy stresses (current pulses 8 mu s/20 mu s or 0.5 s AC burst wave-forms) on some parameters describing the condition of the varistors. Modeling of varistor properties using electrical schemes is used for analysis of its structural changes.
