Results 81 to 90 of about 395,154 (260)
Reliability evaluation of metal oxide varistors for maintenance scheduling [PDF]
WIT Transactions on Ecology and the Environment, Vol 91, 2006 Surge overvoltages result in a power system from overcurrents due to atmospheric discharges, induction phenomena, switch operations or faults. In order to reduce the probability of injuries to people and of failure of electrical and electronic systems, power systems within a structure should have adequate equipotential bonding. Surge protective devices
Amicucci, G. L., Gentile, P.
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Large dopant dependence of the current limiting properties of intrinsic conducting polymer surge protection devices [PDF]
, 2016 New two terminal surge protection devices based on intrinsic conducting polymers are demonstrated to be strongly affected by the dopant molecule type. Thermogravimetric analysis combined with current–voltage studies show a causal link between the dopant ...
Gee, Alex +6 more
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, 1978 An electroexplosive device is presented which employs a header having contact pins hermetically sealed with glass passing through from a connector end of the header to a cavity filled with a shunt layer of a new nonlinear resistive composition and a heat-
Menichelli, V. J.
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Detection mechanism in highly sensitive ZnO nanowires network gas sensors
, 2019 Metal-oxide nanowires are showing a great interest in the domain of gas sensing due to their large response even at a low temperature, enabling low-power gas sensors.
Caicedo, Nohora +4 more
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Dianci bileiqi, 2011 MOV型SPD在运行时,一些因素会使MOV启动后的电流过大,电流发热量超出MOV热容量就会使SPD失效。国家标准中热稳定实验考查的就是MOV对于这种热量累积的耐受程度。对国家标准中关于MOV（Metal Oxide Varistor）型SPD（Surge Protective Device）的热稳定性判断条件进行试验和分析,对比了直流和交流电压两种情况下的热量累积并设计试验。把直流电和交流电热累积统一到"热阻"的概念,试验表明,直流电造成的SPD发热量比交流电造成的SPD发热量大10%。
杨天琦, 王振会, 朱传林, 孙涌
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Power Electronic Devices and ComponentsThis article conducts practical tests on four different configurations of solid-state DC circuit breakers (SS-DCCBs), investigating fault detection and circuit interruption phenomena in DC systems.
Mehdi Moradian +2 more
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Cold-Sintered ZnO Ceramic Composites Co-Doped with Polytetrafluoroethylene and Oxides. [PDF]
Molecules, 2023 Xiao Y +7 more
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Efek Aditif Bi2o3 Terhadap Mikrostruktur Dan Koefisien Non Linier Varistor Zno [PDF]
, 2007 Telah dilakukan pembuatan varistor ZnO dengan menggunakan bahan baku : ZnO (E-Merck) danaditif : 0 %, 2,5 %, 5 %, 7,5 %, dan 10 % berat Bi2O3 . Sifat utama varistor ZnO adalah koefisien nonlinier (α) dan merupakan parameter yang mempengaruhi korelasi ...
Gade, M. (M), Muljadi, M. (Muljadi)
core
Review and Analysis of Voltage Clamping Circuits With Low Overvoltage Ratios for DC Circuit Breakers
IEEE Open Journal of the Industrial Electronics SocietyVoltage clamping circuits are critical components in most direct-current circuit breakers (dcCBs) to achieve ultrafast dc fault interruptions and an extended lifetime.
Shuyan Zhao +4 more
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Gaoya dianqi, 2023 金属氧化物压敏电阻（metal oxide varistor,MOV）广泛应用于各种直流断路器中，用于抑制过电压、系统能量耗散与开断电压建立。受目前加工工艺限制，单MOV阀片通流能力有限，故断路器中多采用多柱并联结构。柱间电流分配不均会导致局部阀片超负荷耗能，造成开断失败甚至设备损坏。文中基于实验测量建立了一种直流开断工况下的MOV电气模型，基于该模型提出了MOV阀片均流选配方法。经实验验证，传统基于雷电冲击测试方法选配的MOV在直流开断工况的均流特性不能完全满足要求 ...
龙辰 +7 more
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