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Insulator (electricity)

About: Insulator (electricity) is a research topic. Over the lifetime, 15941 publications have been published within this topic receiving 108950 citations. The topic is also known as: electrical insulator.


Papers
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Journal ArticleDOI
01 Jan 2022
TL;DR: In this article , the echo state network is used for the classification of the insulators based on the ultrasound signal, which achieves 87.36 % accuracy for the multiclassification and 99.99 % for the specific classification of drilling.
Abstract: Insulators are components of electrical power grid that have the function of mechanically supporting cables and isolating electrical potential. The proper functioning of the insulators is essential for the continuity in the supply of electrical energy. When an insulator has its properties damaged, disruptive discharges may shut down the system and impairs the network’s reliability. For this reason, classifying adverse conditions is a critical task to keep the system running. In this paper, the echo state network is used for the classification of the insulators based on the ultrasound signal. Hypertuning is applied to automate the evaluation of the parameters and optimize the network to have a general application. The insulators are evaluated in the laboratory under controlled conditions from the application of 7.95 kV (phase-to-ground), under the same conditions that are found in the field. The assessment is made on perforated and contaminated insulators, which were removed from service due to defects. The echo state network achieves 87.36 % accuracy for the multiclassification and 99.99 % for the specific classification of drilling. For comparative analysis, the multilayer perceptron and support-vector machines are evaluated based on the fast fourier transform. The results show that echo state network is promising to classify the evaluated conditions, being more accurate than the multilayer perceptron and support-vector machines based on fast fourier transform.

31 citations

Patent
15 Oct 2003
TL;DR: In this article, a bus line fixing portion projecting in a direction intersecting the longitudinal axis of the insulator tube from the proximity of its end opposite to the fixed end is used to support a bus-side conductor in an insulated fashion.
Abstract: A tank filled with an insulating gas accommodates insulator tubes incorporating vacuum-valve breakers for individual phases One end of each insulator tube is fixed to the inside of the tank Each vacuum-valve breaker is installed generally on a common longitudinal axis with the relevant insulator tube in such a manner that its movable electrode rod is directed toward the fixed end of the insulator tube The insulator tube has as its integral part a bus line fixing portion projecting in a direction intersecting the longitudinal axis of the insulator tube from the proximity of its end opposite to the fixed end to support a bus-side conductor in an insulated fashion

31 citations

Patent
Takayuki Urata1, Mitsuhiro Sano1, Akihiro Umeda1, Kiyoyoshi Takada1, Izuo Hirota1 
16 Jan 2003
TL;DR: In this paper, a vacuum heat insulator is used to provide excellent heat insulating performance even at high temperature, and this excellent heat insulation performance is maintained for a long period.
Abstract: In this vacuum heat insulator, an excellent heat insulating performance is obtained even at high temperature, and this excellent heat insulating performance is maintained for a long period. The hot insulating device and electric water heater using this vacuum heat insulator exhibit an excellent hot insulating performance, and are decreased in the power consumption for hot insulation. The vacuum heat insulator includes a laminate bag, and an insulating core placed in the laminate bag, and the inside of the laminate bag is evacuated in a vacuum state. The laminate bag is made of a laminate film. The laminate film includes a support layer, a deposition layer evaporated on the surface of the support layer, a protective layer placed at the surface side of the deposition layer, and a seal layer placed at the back side of the deposition layer. The deposition layer is formed of at least one material of metal and metal oxide. In this laminate film, (i) the support layer has a plastic film having a glass transition point of 87° C. or higher, (ii) the protective layer has a plastic film having a glass transition point of 87° C. or higher, (iii) the deposition layer has a property of transmitting high frequency magnetic field, or (iv) the laminate bag has a seal portion formed by junction of the seal layer, and the laminate film further as a metal foil placed at a position excluding the seal portion.

31 citations

Journal ArticleDOI
W. P. Noble1, W. W. Walker
TL;DR: In this paper, the authors explore the consequences and requirements of continuing existing density trends into the 1-4 Mb range and show that the stored charge density requirement for planar capacitors will be limited by the resultant electric field both in the insulator and silicon.
Abstract: The evolution of the silicon dynamic RAM toward higher levels of integration has occurred primarily as a result of decreasing the size of the area in which a single bit is stored. This has been accomplished by reducing the thickness of the storage capacitor insulator, introducing higher dielectric constant materials, and increasing the silicon doping levels. Existing published data are used to explore the consequences and requirements of continuing existing density trends into the 1-4 Mb range. The results indicate that the stored charge density requirement for planar capacitors will be limited by the resultant electric field both in the insulator and silicon. These limitations are imposed by insulator conduction, tunneling, and silicon impact ionization. It is evident that for the projected stored charge density of 30 fc/μm2 for a 4-Mb DRAM, new concepts of cell design or operation must be introduced.

31 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023368
2022892
2021224
2020478
2019561
2018629