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The physics of metal oxide varistors
Journal of Applied Physics, 1975This paper outlines our present understanding of the conduction mechanisms and physical processes relevant to the performance of ZnO−based ceramic varistors. Varistor behavior is determined by the gross ceramic microstructure of the device as well as by the localized conduction processes which occur between grains. We show that the qualitative features
Lionel M. Levinson, H. R. Philipp
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IEEE Transactions on Circuits and Systems - II - Express Briefs, 2020
Metal–oxide varistor (MOV) is a kind of special ceramic which can be used for square pulse forming based on its nonlinear electrical characteristics.
Yancheng Cui +5 more
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Metal–oxide varistor (MOV) is a kind of special ceramic which can be used for square pulse forming based on its nonlinear electrical characteristics.
Yancheng Cui +5 more
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Durability Analysis of Metal Oxide Varistor under Direct Current Switching Surges
2020 International SAUPEC/RobMech/PRASA Conference, 2020The circuit-break switch of a direct current (DC) system will have to dissipate any stored residual line inductance energy during the switch-off period.
D. van Niekerk, P. Bokoro
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Pressure effects on metal oxide varistors
Applied Physics Letters, 1976Preliminary results on the strong dependence of current-voltage characteristics of ZnO-based metal oxide varistors on pressure up to ∼5 kbar (nominal) are reported. This letter perhaps constitutes the first pressure study on electronic ceramics.
J. Wong, F. P. Bundy
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The Effect of Electrical and Moisture Degradation of Metal Oxide Varistor with Insulation Diagnosis
IEEE International Conference on Condition Monitoring and Diagnosis, 2020Condition based monitoring of surge arresters (SA) has become a primary concern to ensure power supply quality on medium and high voltage networks. Understanding of SA behavior helps forecast their failure.
C. Chuayin +3 more
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Thermal Runaway in Metal Oxide Varistors
MRS Proceedings, 1981ABSTRACTThe conditions leading to thermal runaway in metal oxide varistors are discussed in terms of its power dissipation. An equivalent circuit is used to rationalize the similarities and differences between the DC and 60 Hz ac behavior.
Martin A. Seitz +2 more
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Surge ageing of metal oxide varistors
2015 IEEE Electrical Insulation Conference (EIC), 2015The objective of this paper is to analyze the ageing of metal oxide varistors (MOV) due to surges by the changes of the nonlinear behavior. The surge arrester installed in the field is submitted to the lightning stress superposed to the power frequency voltage, and so, submitted to an ageing process due to both cumulative stresses.
Credson de Salles +2 more
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Applied Power Electronics Conference
Energy absorption devices play a critical role in semiconductor-based dc circuit breakers (DCCBs), where they generate a counter-voltage to reverse fault current direction and dissipate fault energy during the interruption process.
Z. Zhang +3 more
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Energy absorption devices play a critical role in semiconductor-based dc circuit breakers (DCCBs), where they generate a counter-voltage to reverse fault current direction and dissipate fault energy during the interruption process.
Z. Zhang +3 more
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IEEE Transactions on Power Delivery
The dynamic models of the metal-oxide varistors (MOV) have been developed successively and they show good performances in the prediction of the residual voltage.
Yu-ying Wu +3 more
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The dynamic models of the metal-oxide varistors (MOV) have been developed successively and they show good performances in the prediction of the residual voltage.
Yu-ying Wu +3 more
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Surface flashovers on metal-oxide varistor blocks
ICSD'98. Proceedings of the 1998 IEEE 6th International Conference on Conduction and Breakdown in Solid Dielectrics (Cat. No.98CH36132), 2002Extensive studies have been made of surface flashovers on varistor blocks using multipulse (MP) currents which simulate multiple stroke lightning ground flashes. The MP results are compared with those obtained with single-pulse (SP) currents and with high temporary overvoltages (TOV) at 50 Hz. The blocks used were mostly of 5 kA rating as commonly used
M. Darveniza, T.K. Saha
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