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Electrothermal and Overload Performance of Metal-Oxide Varistors
IEEE Transactions on Power Delivery, 2020The energy absorption capability of metal-oxide varistors, decidedly influenced by the electrothermal processes occurring within their microstructures, is a vital parameter for the effective surge protection. This paper proposes a numerical model for the simulation of the electrothermal phenomena occurring in metal-oxide varistors.
Zumret Topcagic +2 more
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Failure Analysis of Metal Oxide Varistor used in Wireless Charger of Automotive Vehicle
ARAI Journal of Mobility TechnologyAutomotive advancement mainly focuses on Personalization, Automation, Connectivity and Electrification (PACE) which includes advancement in wireless and telecommunication domain.
Srishti Bhatt, Dr. Shirish C. Bali
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Second-breakdown characteristics of metal-oxide varistors
Journal of Applied Physics, 1977Several new results on the electrical breakdown properties of ZnO-based ceramic varistors are presented. A second-breakdown phenomenon associated with thermal runaway and characterized by a negative differential conductivity was observed in dc tests. The curve of capacitance versus bias current exhibited hysteresis while the I-V characteristics became ...
J. J. Lee, J. K. O’Brien, M. S. Cooper
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Coordination of surge protection and operation of thermal protection at metal oxide varistor (MOV)
2025 International Symposium on Lightning Protection (XVIII SIPDA)In the design of MOV modules including a thermal cut off for low-voltage AC power supplies, PV, and DC applications, thermal coordination between MOV heat generation by impulses and protection for thermal runaway was investigated in order to realize a ...
N. Tsukamoto +2 more
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International Conference on Electronic Packaging Technology
Metal oxide varistor (MOV) is a ceramic electronic component, which is extremely sensitive to overvoltage and is widely used in overvoltage protection devices. The resistance of MOV increases as the voltage across its terminals rises, thus it serves as a
Can Zhao +5 more
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Metal oxide varistor (MOV) is a ceramic electronic component, which is extremely sensitive to overvoltage and is widely used in overvoltage protection devices. The resistance of MOV increases as the voltage across its terminals rises, thus it serves as a
Can Zhao +5 more
semanticscholar +1 more source
Frequency limitation of metal-oxide varistors
International Journal of Electronics, 1992The frequency possibilities of metal-oxide varistors are investigated. An expression is deduced for the limiting frequency f o of their application. It is also expressed in terms of the catalogue data of commercial varistors or by means of the parameters or the ceramic material. An evaluation of the f o of ZnO, SnO2 and SrTiO3 varistors is made.
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Capacitance changes in degraded metal oxide varistors
Proceedings of the 2004 IEEE International Conference on Solid Dielectrics, 2004. ICSD 2004., 2004ZnO based ceramics show a highly nonlinear current-voltage (I-V) characteristic due to intergranular layers at the boundaries of ZnO grains. This research indicates that the junctions formed on the border between ZnO grains and the intergranular phase are responsible for the creation of potential barriers which control the flow of current through the ...
M. Jaroszewski +3 more
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Research on the Degradation Process of Metal Oxide Varistor based on Macroscopic Capacitance
2024 3rd International Conference on Energy, Power and Electrical Technology (ICEPET)Metal Oxide Varistor (MOV) is extensively used in overvoltage protection due to its excellent nonlinear voltage-current characteristics. Serving as the core component of arresters and surge protection devices, MOV is subjected to prolonged operation and ...
Hui Qiu +7 more
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2019 IEEE 8th International Conference on Advanced Power System Automation and Protection (APAP), 2019
In this paper, a modified distance protection setting method is proposed to use the conventional distance relays for the transmission lines. The comprehensive studies regarding the impact of the thyristor-controlled series capacitor (TCSC) on a ...
Woo-Seok Seo +3 more
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In this paper, a modified distance protection setting method is proposed to use the conventional distance relays for the transmission lines. The comprehensive studies regarding the impact of the thyristor-controlled series capacitor (TCSC) on a ...
Woo-Seok Seo +3 more
semanticscholar +1 more source
Multi-factor ageing of metal oxide varistors
Proceedings of IEEE Conference on Electrical Insulation and Dielectric Phenomena - (CEIDP'94), 2002Localised overheating of zinc oxide varistor elements due to the transfer of external leakage currents arising from the incidence of partial electrical discharges (PD) onto their outer surface has been shown to cause premature failure by surface breakdown.
N.M. Vong +3 more
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