Results 11 to 20 of about 1,546 (174)
Transformers Magazine, 2022 Current transformers are used to monitor large currents within power grids and power stations, producing a current in the device’s secondary winding that is proportional to the current flowing in its primary winding. Varistors are used to protect current transformers by preventing an open circuit condition if the secondary is disconnected, which can ...
Galvin, Dr. Tom, Coll, Dominic
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International Journal of Ceramic Engineering & ScienceFrom a materials‐computation perspective, this study integrates the electron‐excitation model of double Schottky‐barriers with a Voronoi network to characterize the microscopic electrical and structural properties of ZnO varistors.
Zhengzheng Fu +7 more
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High VoltageThis study focuses on the distribution of high‐resistance media (pores and spinels) within ZnO varistors and explores the mechanical and electrical failure mechanisms of varistors under different pulse actions.
Pengfei Meng +7 more
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ZnO varistors—Preparation of nano and micro sized powders by mechanical methods for low and high voltage varistors [PDF]
, 2008 ZnO-Bi2O3-Sb2O3 varistors are as essential today as they have been since their discovery five decades ago. Their role is to protect other electronic components against oncoming surges of electrons and survive.
Kelleher, Maura
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Leakage Current Measurements of Surge Arresters
Energies, 2023 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.
Marek Olesz +2 more
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High Voltage, 2020 Element doping is an effective method to improve the performance of ZnO varistors. Previous studies mainly focused on the variation of microstructures and Schottky barriers.
Men Guo +7 more
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Electrical properties of magnesium titanate ceramics post-sintered by hot isostatic pressing [PDF]
Science of Sintering, 2017 Post-sintering of magnesium titanate ceramics by hot isostatic pressing (HIP) in an oxygen-free atmosphere significantly alters various electrical properties of the product. In particular, the sintered material becomes a semiconductor.
Đorđević Antonije R. +5 more
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Varistor coupling method and recommendation parameters for combination wave test
IET Science, Measurement & Technology, 2023 Varistor coupling is recommended by International Telecommunication Union in combination wave test waveforms of surge protective devices (SPD), although the varistor coupling method and recommendation parameters for the combination wave test are not well
Mi Zhou +6 more
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Hydrogen-induced degradation in SrTiO3-based ceramic varistors
, 2004 For ZnO-based ceramic varistors, it was found that the current leakage is largely increased by the reduction of hydrogen generated in nickel electroplating and electroless nickel plating.
Chan, H.L.W., Li, B.R., Chen, W.P.
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Control of Varistor Voltage by Grain-size Control of Bi-added ZnO Varistors
IOP Conference Series: Materials Science and Engineering, 2011 Relationship between the grain size of ZnO and the amounts of Bi and Sb for Bi-Ba-Sb-Co-Mn-added ZnO was investigated. The amount of Bi at which the grain size of ZnO became the maximum shifted to the notably larger one by adding small amount of Sb such as 0.01 mol%.
Fukumori, Ai +3 more
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