Title:	Third harmonic index as a diagnostic tool of high-voltage varistors
Authors:	Hasse, L. Smulko, J. Spiralski, L.
Citation:	Electroscope. 2008, Konference EDS 2008. EDS '08 IMAPS CS International Conference Proceedings. Brno, VUT v Brně, 2008.
Issue Date:	2008
Publisher:	Západočeská univerzita v Plzni, Fakulta elektrotechnická
Document type:	článek konferenční příspěvek article conferenceObject
URI:	http://147.228.94.30/images/PDF/Rocnik2008/EDS_2008/hasse.pdf http://hdl.handle.net/11025/517
ISBN:	978-80-214-3717-3
ISSN:	1802-4564
Keywords:	vysokonapěťové varistory;elektrotechnická diagnostika;třetí harmonický index;ZnO
Keywords in different language:	high voltage varistors;electrotechnical diagnostics;third harmonic index;ZnO
Abstract in different language:	High voltage varistors that consist of grained ZnO have to be tested before assembling. The recommended method for standard industrial testing of varistors demands application of high voltages and intensive currents that is inconvenient and needs extensive power consumption. This method requires also metallization of the ZnO structures that increases a cost of testing. Another method of varistor quality and endurance evaluation by the third harmonic index measurement at relatively low voltage range has been proposed. In this experimental study, we present results of the third harmonic index measurements in the selected varistors types. The applied measurement system and results of the THI (Third Harmonic Index) measurements for the selected high-voltage varistor types have been presented. It was proved that the proposed procedure can be applied for preliminary selection of the tested 280 V structures at their fabrication stage.
Rights:	Copyright © 2007-2010 Electroscope. All Rights Reserved.
Appears in Collections:	2008 Konference EDS 2008 (2008)

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