Results 191 to 200 of about 1,951 (227)
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Investigation of various models for metal oxide varistors
Journal of Electronic Materials, 1976A new type of voltage dependent resistors (varistors), based on zinc oxide ceramics with several other metal oxides as additives, has recently been investigated. The microstructure of these varistors consists of ZnO grains surrounded by thin insulating metal oxide barriers.
J. Bernasconi +3 more
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Development of metal oxide varistor element for power systems
Proceedings of IEEE International Symposium on Industrial Electronics, 2002A highly nonlinear arrester can improve the insulation coordination of electrical substations and reduce the basic impulse level of power systems. Metal oxide varistors with zinc oxide as one of their constituents are used as advanced protective devices for power systems against transient overvoltages.
S.N. Roy +3 more
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Impedance Characteristics of Metal Oxide Varistor under Different Pulses
2019 IEEE Pulsed Power & Plasma Science (PPPS), 2019In this paper, the metal oxide is determined according to the characteristics of the very fast transient overvoltage (VFTO) waveform measured in the gas-insulated metal-enclosed switchgear (GIS) according to the standard regulations. The waveform parameters of the metal oxide varistor (MOV) test platform were designed to build pulse generators with 8µs,
Wei Zhang, Jie Guo
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Metal oxide varistor action -a homojunction breakdown mechanism
Applications of Surface Science, 1978Abstract The metal oxide varistor action has been localized in the vicinity of directly touching ZnO grains, where no heterolayer is detected. Two separable diodes connected back to back are assumed to be formed by a finite local distribution of compensating states extending from the grain boundary into the ZnO grain.
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Der Metall‐Oxid‐Varistor (MOV)
Physik in unserer Zeit, 1986Elmar Ziegler, Reinhard Helbig
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A new component - the metal oxide varistor suppressor
1972 IEEE Power Processing and Electronics Specialists Conference, 1972The paper deals with the novel aspects of a newly developed transient voltage suppressor. Details of its operation, fabrication and characterization are given. Its performance is compared against the more familiar devices currently used for transient voltage protection including devices such as spark gaps, zeners and selenium suppressors.
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Simple Model of Metal Oxide Varistor for Pspice Simulation
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, 2004Metal oxide varistors (MOVs) are commonly used to suppress transients in many applications, such as industrial process measurement and control instrumentation, when exposed to electromagnetic interference. Varistors symmetrical, sharp breakdown characteristics enable them to provide transient suppression performance.
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Conduction mechanisms in metal oxide varistors
Journal of Solid State Chemistry, 1975Lionel M. Levinson, H.R. Philipp
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Grain Resistivity and Conduction in Metal Oxide Varistors
1986Metal oxide varistors are ceramic devices with highly nonlinear current-voltage characteristics similar to back-to-back Zener diodes.1−4 Typical I-V characteristics for a metal oxide varistor at 77 K and for a small range of temperatures near 300 K are shown in Fig. 1. They are produced by sintering ZnO powder together with small amounts (1 to 10 mole %
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