Review
Version 1
Preserved in Portico This version is not peer-reviewed
Leakage Currents Measurements of Surge Arresters
Version 1
: Received: 29 June 2023 / Approved: 29 June 2023 / Online: 29 June 2023 (14:30:41 CEST)
A peer-reviewed article of this Preprint also exists.
Olesz, M.; Litzbarski, L.S.; Redlarski, G. Leakage Current Measurements of Surge Arresters. Energies 2023, 16, 6480. Olesz, M.; Litzbarski, L.S.; Redlarski, G. Leakage Current Measurements of Surge Arresters. Energies 2023, 16, 6480.
Abstract
The paper presents the methods of assessing the technical condition of varistor surge arresters used in laboratory tests and in operation - performed without disconnecting the arresters from the network. The analysis of diagnostic methods was supplemented with the results of measurements of the leakage current of arresters coming directly from production and used in the power industry. Among the available methods of evaluating the technical condition of arresters, mainly indicator solutions (temperature, operation counter) and using the measurement of selected parameters of the leakage current are used. In the latter, the method of determining the resistive component of the leakage current, determined on the basis of the analysis of voltage and current waveforms, or only the arrester current, has become widespread. In this type of measurements, current clamps are used in operation, and additionally in voltage measurements from voltage transformers, where you have to take into account the fundamental, additional sources of errors discussed in the article. These errors and dispersion resulting from the production technology may fundamentally hinder the proper assessment of the technical condition, hence it is so important to properly recognize the listed basic sources of measurement uncertainty. In addition, the analysis should take into account three factors related to external conditions - temperature, voltage applied to the arrester and the content of higher harmonics in the supply voltage for which appropriate methods have been provided to determine the active component of the leakage current for reference conditions.
Keywords
surge arresters; varistors; diagnostic; leakage current; the real part of the leakage current
Subject
Engineering, Electrical and Electronic Engineering
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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