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Journal articles on the topic 'Main insulation'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Szucs, Aron, Zlatko Kolondzovski, Jan Westerlund, and Juha Vahala. "Diamond enriched lamination and winding insulation for electrical machines." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 38, no. 4 (2019): 1245–52. http://dx.doi.org/10.1108/compel-10-2018-0397.

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Purpose The thermal management of electrical insulations poses a challenge in electrical devices as electrical insulators are also thermal insulators. Diamond is the best solid electrical insulator and thermal conductor. This can lead to a paradigm change for electrical machine winding and lamination insulation design and thermal management. The paper introduces these techniques and discusses its effect for the design of electrical machines and its potential consequences for electromagnetic analysis, for example, in multi-physics modelling. The diamond winding insulation is patent-pending, but

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2

Andreev, A. M., A. I. Tadzhibaev, A. Sh Azizov, et al. "Ensuring the reliability of turbogenerators on the basis of the control of discharge processes in the stator winding insulation." Safety and Reliability of Power Industry 15, no. 3 (2022): 199–204. http://dx.doi.org/10.24223/1999-5555-2022-15-3-199-204.

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Issues related to the reliability of the electrical insulation system of high-load powerful turbogenerators with indirect gas cooling are considered and analyzed. The mechanisms of aging of the main components (main insulation, slot filling elements) of the insulation system under operating conditions exposed to electrical and thermal fields, and mechanical forces are studied. Modern ideas about the mechanisms of aging of main insulation and slot filling elements under the action of internal and external impacts (slot and spark discharges) are analyzed. The degradation of insulating materials

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3

Dulskiy, E., V. Kruchek, and P. Kolpahchyan. "Comparative experimental studies of the main electrical parameters of electrical equipment insulation after drying by various methods." Journal of Physics: Conference Series 2131, no. 4 (2021): 042076. http://dx.doi.org/10.1088/1742-6596/2131/4/042076.

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Abstract The article is devoted to the assessment of the comparative experimental studies’ results of various technologies for drying impregnated insulation of power electrical equipment in the process of manufacturing and repair: standard technology, which provides for convective drying using high-power electric ovens, and the proposed technology and methods for accelerated drying in hardware complexes using infrared (IR) radiation. In particular, the article presents the results of the polymer insulation surface microstructure analysis after drying by the indicated methods. The research was

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Manohar, J., S. Ramprakash, G. Selvakumar, and Dhiliban. "A Case Study on Insulating Main Steam Line (MSL) with Silica Aerogel." Applied Mechanics and Materials 852 (September 2016): 693–98. http://dx.doi.org/10.4028/www.scientific.net/amm.852.693.

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In this paper, a case study on replacing the existing insulating material (Mineral wool) by the Silica Aerogel in the main steam line (MSL) of the thermal power plant is presented.A sample length of 3 m in MSL was insulated with various thicknesses of silica aerogel, mineral wool and the combinations of mineral wool and silica aerogel. The heat loss in the sample length with different insulating material was calculated by carrying out field experiments. The results show that the silica aerogel is providing better insulation than the mineral wool. Nonetheless, the use of silica aerogel is expen

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Yashchenko, Sergey, and Dmitry Luchko. "The dependence of the air permeability of glass-mica tapes on the technology of production." Energy Systems 7, no. 3 (2022): 63–69. http://dx.doi.org/10.34031/es.2022.3.007.

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The main part of technological processes in almost all industries, including those related to transportation, processing of mineral raw materials, cannot be implemented without the use of electric motors. The high reliability of these machines ensures trouble-free operation and guarantees the safety of people in these industries. The reliability indicators of electric machines depend on the insulation condition of the windings, which is largely determined by the saturation of the winding cavities with the impregnating compound that penetrated them during impregnation. Various manufacturing tec

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Wang, Hongwei, and Shuguang Zhang. "The nomogram establishment of thermal conductivity and strength of insulating concrete for high temperature mine." E3S Web of Conferences 118 (2019): 01001. http://dx.doi.org/10.1051/e3sconf/201911801001.

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The insulating concrete can be effectively reduced heat exchange between surrounding rock and ventilation air, which is of positive significance to mine cooling and energy conservation. The law of the mixing amount of insulation material on thermal conductivity and strength was discovered through testing 75 specimens of insulating concrete used for mine. Based on new effective medium theory, calculation model of coefficient of heat conductivity is deduced, and its parameters are acquired with the surface regression analysis method, then the mixing threshold of insulation material is determined

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Xue, Yun, Rong Wu, and Hui Xia Wen. "The Main Control Measures of Envelope Insulation Building." Applied Mechanics and Materials 409-410 (September 2013): 593–97. http://dx.doi.org/10.4028/www.scientific.net/amm.409-410.593.

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The construction of envelope insulation building is an important part of building energy-saving engineering. For the strict control of the external structure, is to promote the most effective mean of building energy efficiency. EPS thermal insulation system and exterior window insulation system as external structure of the master project, the construction should be integrated control system strengthening.

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8

Papkov, Andrey, and Dmitry Luchko. "RESULTS OF COMPARATIVE RESOURCE TESTS OF INSULATION SYSTEMS OF HEAT RESISTANCE CLASS H (180°C) OF TRACTION ENGINES OF ELECTRIC LOCOMOTIVES USING POLYESTHERKETONE AND POLYIMIDE FILMS." Energy Systems 8, no. 2 (2023): 51–59. http://dx.doi.org/10.34031/es.2023.2.006.

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The operation of electric locomotive traction motors in conditions of constantly increasing temperature and humidity naturally leads to a decrease in the resistance of the body insulation of the coils of the main and auxiliary poles, which then leads to insulation breakdown and engine failure. In the general statistics on TED breakdowns, the percentage of failure due to low insulation resistance is up to 30%. Manufacturers of electrical insulation are constantly working to increase its reliability, using modern systems of polymer materials for this purpose. This article provides a brief

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9

Cui, Yi, Guang Ning Wu, Yi Qiang Zhang, Zheng Liang Xin, and Yang Luo. "Electrical Treeing Breakdown Properties for Polyimide Nanocomposite Film in Inverter-Fed Motors." Advanced Materials Research 455-456 (January 2012): 553–58. http://dx.doi.org/10.4028/www.scientific.net/amr.455-456.553.

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The failure of magnet wires used in inter-turn insulation of inverter-fed motor winding is the main cause which leads to the motor insulation breakdown. This paper conducted electrical tree breakdown experiments on magnet wire insulating film (FCR 100) used in the inter-turn insulation of JD117 inverter-fed motor and meanwhile combining with energy spectrum analysis and scanning electrical microscope (SEM), by which type and content of elements, breakdown main body and electrical tree channel could be clearly observed, the corresponding failure mechanisms were analyzed. The experiment results

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Zach, Jiri, Jitka Peterková, Vít Petranek, Jana Kosíková, and Azra Korjenic. "Investigation of Thermal Insulation Materials Based on Easy Renewable Row Materials from Agriculture." Advanced Materials Research 335-336 (September 2011): 1412–17. http://dx.doi.org/10.4028/www.scientific.net/amr.335-336.1412.

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Production of building materials is mostly energy consuming. In the sphere of insulation materials we mostly see rock wool based materials or foam-plastic materials whose production process is demanding from material aspect and raw materials aspect as well. At present the demand for thermal insulation materials has been growing globally. The thermal insulation materials form integral part of all constructions in civil engineering. The materials mainly fulfill the thermal insulating functions and also the sound-insulating one. The majority of thermal insulation materials are able to fulfill bot

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11

Li, Weili, Yong Li, Ying Su, Purui Wang, and Wenmao Liu. "Research on Stator Main Insulation Temperature Field of Air-Cooled Turbo-Generator after Main Insulation Shelling." Energies 11, no. 5 (2018): 1101. http://dx.doi.org/10.3390/en11051101.

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12

M, Khoukhi. "Thermal Assessment of a New Bio - Based Insulation Material." Open Access Journal of Waste Management & Xenobiotics 2, no. 4 (2019): 1–5. http://dx.doi.org/10.23880/oajwx-16000133.

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In recent times, the building sector is moving towards new approaches to energy - efficient design "low energy consumption". The development of bio - based thermal insulation materials contributes to such approaches; their implementation in the building gives a good result in a reduction of energy demand. Moreover, another beneficial environmental portion such as the reduction in the depletion of non - renewable resources and in waste generation. Using thermal insulation in the building envelope can substantially reduce the building's thermal load and consequently its energy consumption. Therm

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13

Hordiienko, А. "ANALYSIS OF INSULATION SYSTEMS OF ELECTRIC MOTORS OF MAIN CIRCULATION PUMPS VVER-1000 WITH THE PURPOSE OF ITS MODERNIZATION AND IMPROVEMENT." Municipal economy of cities 1, no. 189 (2025): 43–51. https://doi.org/10.33042/2522-1809-2025-1-189-43-51.

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The article is devoted to the study of the influence of the geometric parameters of the conductor and insulation on the durability of the insulation systems of electrical machines. In modern industrial conditions, the reliability and durability of electrical machines play a key role, since the efficiency of many technological processes depends on their stable operation. Optimization of the design of windings and insulation is becoming an important task aimed at improving performance and reducing maintenance costs. The paper examines approaches to optimizing insulation systems taking into accou

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14

Zhang, Hao, Ling Ping Yue, Fei Xiang Wei, and Hao Gong. "Design of Cable Main Insulation and Outer Sheath Insulation Online Monitoring System." Applied Mechanics and Materials 385-386 (August 2013): 907–10. http://dx.doi.org/10.4028/www.scientific.net/amm.385-386.907.

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An online monitoring system of main insulation and outer sheath of power cable is designed in this paper. The system can monitor the insulation of the power cable without change the normal power cable wiring and grid structure. Changes of the main insulation and outer sheath of power cable can be monitor and recorded. Alarm of given when the insulation of the power cable is abnormal. System managers arrange outage maintenance depends on the status of the power cable.

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15

Arsenyev, Dmitry, Simon Dubitsky, Dmitry Kiesewetter, and Victor Malyuin. "Numerical Simulation and Calculation of Resistance of Laminated Paper-Impregnated Insulation of Power Cables." Energies 15, no. 19 (2022): 7403. http://dx.doi.org/10.3390/en15197403.

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Numerical simulation of polypropylene laminated paper insulation is a serious challenge, as it must take into account the layered structure and presence of longitudinal and radial gaps in the coils of the winded tape for cables with sector-shape conductive cores. Thus far, it has been performed only with serious simplifications. We propose a technique for numerical modeling of electric parameters in this type of insulation by reducing a complex 3D problem to a simplified 2D model that takes into account the main influencing factors. The results of modeling the distribution of electric field st

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16

Liu, Hong Mei, Yuan Bin Xu, Cheng Qun Wu, Ai Dong Zhu, and Jun Qiu Zuo. "Research on the Performance of Silt Sintered Insulating Brick and Key Molding Equipment." Advanced Materials Research 919-921 (April 2014): 2002–6. http://dx.doi.org/10.4028/www.scientific.net/amr.919-921.2002.

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Silt sintered insulating brick with high strength, good thermal insulation and sound insulation characteristics. It occupies an important position in the new building materials industry. The main equipment for production of silt sintered insulating brick is the vacuum brick extruding machine, the forming mold is the most critical part in it. The performance largely determines the quality of the brick. The structural design and other aspects of the forming mold are analyzed, and then systematically summarize the design and production requirements of the forming mold. The research status of the

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17

Danikas, M., and S. Morsalin. "Foreign Inclusions, Enclosed Cavities, Partial Discharge Models and Discharge Energy: A Short Review Regarding Solid Dielectrics and Composite Insulating Systems." Engineering, Technology & Applied Science Research 9, no. 5 (2019): 4659–66. http://dx.doi.org/10.48084/etasr.2958.

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Partial discharges in cavities are one of the main reasons of breakdown of insulating materials and insulating systems in general. The present paper aims at commenting some aspects of the relation between partial discharges and insulation damage. Some basic models explaining the workings and impacts of discharges in cavities are discussed. Discussions about the possibility of damage in the presence of multiple cavities as well as of the risks of minute discharges and/or charging phenomena below the so-called inception voltage are conducted. It is remarked that the question of the relationship

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Danikas, M. G., and S. Morsalin. "Foreign Inclusions, Enclosed Cavities, Partial Discharge Models and Discharge Energy: A Short Review Regarding Solid Dielectrics and Composite Insulating Systems." Engineering, Technology & Applied Science Research 9, no. 5 (2019): 4659–66. https://doi.org/10.5281/zenodo.3510174.

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Partial discharges in cavities are one of the main reasons of breakdown of insulating materials and insulating systems in general. The present paper aims at commenting some aspects of the relation between partial discharges and insulation damage. Some basic models explaining the workings and impacts of discharges in cavities are discussed. Discussions about the possibility of damage in the presence of multiple cavities as well as of the risks of minute discharges and/or charging phenomena below the so-called inception voltage are conducted. It is remarked that the question of the relationship

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19

Zach, Jiří, Jitka Peterková, and Vítězslav Novák. "Utilization of CaO for Improvement of Durability of Vacuum Insulating Panels (VIP)." Solid State Phenomena 296 (August 2019): 203–8. http://dx.doi.org/10.4028/www.scientific.net/ssp.296.203.

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Vacuum insulation panels (VIP) currently belong to a group of so-called super-insulating materials. These are special products with an extremely low equivalent value of the thermal conductivity coefficient. Despite this fact, the use of VIP in the construction industry is rather problematic. The main issue is the relatively complicated VIP integration into building structures, as well as the limited VIP durability. The issue of durability is also one of the main topics of VIP development and research in this field. The paper describes the possibilities of using CaO to increase the durability o

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20

Karabekova, D. Zh. "MAIN CHARACTERISTICS OF THE HEAT FLOW METER." Eurasian Physical Technical Journal 19, no. 2 (40) (2022): 71–74. http://dx.doi.org/10.31489/2022no2/71-74.

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The problems and prospects of application of non-destructive testing methods for technical diagnostics of the thermal networks state and various technological objects are discussed. The recording of the temperature state of thermal processes by using a flow meter is due to its sensitivity to the change of thermophysical characteristics and the ability to control without the use of an external energy source, etc. The description of the developed device to measuring of the heat flow using of a thermoelectric heat flow converter of a special design is shown. A distinctive feature of the device is

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21

Gabrić, Petar, Maja Glavinić, Antun Mikulecky, and Vladimir Podobnik. "RESEARCH OF TRANSFORMER MAIN INSULATION DESIGN RULES." Journal of Energy - Energija 61, no. 1-4 (2022): 13–19. http://dx.doi.org/10.37798/2012611-4233.

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Kappeler research performed more than 50 years ago is widely used for HV transformers insulation design. Even though the original experiment was done for oil ducts width from 0.5 to 6 mm, the results have been extrapolated to ducts up to 100 and more mm without detailed publication that would confirm the validity of this extrapolation. This paper presents the experiment that aims to expand Kappeler research to oil duct width up to 30 mm. Model setup also allows creepage and barriers effect testing up to 30 mm.

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22

Song, Jinbao, Lishuang Wang, Jiantao Yao, and Hui Dong. "Multi-Scale Structural Design and Advanced Materials for Thermal Barrier Coatings with High Thermal Insulation: A Review." Coatings 13, no. 2 (2023): 343. http://dx.doi.org/10.3390/coatings13020343.

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Thermal barrier coatings (TBCs) are a fundamental technology used in high-temperature applications to protect superalloy substrate components. However, extreme high-temperature environments present many challenges for TBCs, such as the degradation of their thermal and mechanical properties. Hence, highly insulating, long-life TBCs must be developed to meet higher industrial efficiency. This paper reviews the main factors influencing the thermal insulation performance of TBCs, such as material, coating thickness, and structure. The heat transfer mechanism of the coating is summarized, and the d

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23

Li, Min, Wei Yao, Xin Gao, and Yan Ren. "Temperature simulation of oil-immersed transformerbased on fluid-thermal coupling." Journal of Physics: Conference Series 2503, no. 1 (2023): 012060. http://dx.doi.org/10.1088/1742-6596/2503/1/012060.

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Abstract The main components of the transformer face overheating and insulation aging caused by electromagnetic losses, which affect their service life. This paper analyzes an oil-immersed transformer with a rated voltage of 800kV based on heat transfer and fluid dynamics principles. The temperature distribution is carried out by magnetic-thermal coupling simulation. The influence of insulation oil flow rate on temperature is analyzed in the thermal field calculation, and the overall temperature rise of transformer and insulating oil is obtained. It turned out that the highest hot spot of the

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Crnoja, Andelko, Vladimir Kersh, Oleg Popov, and Alina Dovhulia. "Laboratory Studies of the Heat-Insulating Properties of the Panels that Made of Recycled Rubber." Key Engineering Materials 864 (September 2020): 66–72. http://dx.doi.org/10.4028/www.scientific.net/kem.864.66.

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This study examines the thermal insulation properties of panels made from recycled rubber. The reasons, in addition to the use in construction, are environmental protection, sustainable development, energy conservation. The thermal conductivity coefficient λ is the main characteristic, on the basis of which a decision is made on the choice of material as a heat insulator. Materials with λ <0.2 W / (m · K) are heat-insulating. Tested 3 composition of the material of different particle size distribution. It is shown that the key parameters that determine the heat-shielding properties of a mat

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25

Dudar, Ihor, Vitaliy Shvets, and Maryna Maksymenko. "OPERATION OF INSULATORS WITH NON-VENTILATED AIR LAYERS AND ENERGY-REFLECTIVE SCREENS." Modern technology, materials and design in construction 33, no. 2 (2023): 6–11. http://dx.doi.org/10.31649/2311-1429-2022-2-6-11.

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The quality of insulation of construction structures - houses and buildings of various purposes - depends on many components, but the main ones were and remain the quality and durability of the materials used. Typical tests are carried out according to indicators of the resistance of the structure with facade thermal insulation to climatic factors and according to the indicator of the reduced heat transfer resistance of the prefabricated system with typical design values of the thickness of the thermal insulation material when they are put into production and in the case of making changes to t

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Tynchenko, V. S., A. S. Lukovenko, V. V. Kukartsev, et al. "System Diagnostics of Supporting-Rod Porcelain Insulation at Digital Substations." WSEAS TRANSACTIONS ON POWER SYSTEMS 16 (September 3, 2021): 195–203. http://dx.doi.org/10.37394/232016.2021.16.20.

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This article is dedicated to an important problem of increasing the reliability of supporting-rod porcelain insulation at electric power substations. Porcelain insulation is installed on open switchgears (OSGs) of substations as part of the main switching equipment. Obsolescence and physical wear results in the destruction of supporting-rod porcelain insulators (SRIs), which often leads to serious consequences: shutdown of substation bus systems, emergency shutdown of substation equipment, reduction of power plant loads, as well as they pose a threat to operational personnel during operational

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Gomez, Ricardo Soares, Túlio Rafael Nascimento Porto, Kelly Cristiane Gomes, et al. "Thermal analysis in an air conditioning duct: An experimental design approach." Research, Society and Development 9, no. 12 (2020): e20291211140. http://dx.doi.org/10.33448/rsd-v9i12.11140.

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The main purpose of this work is to perform a thermal analysis in an air conditioning duct to verify the influence of the thermal properties of the insulating material on the minimum thermal insulation thickness necessary to avoid the condensation of water vapor present in the air. The mathematical formulation is based on Fourier’s law and the first law of thermodynamics. A response surface, a contour plot and a mathematical model for the analyzed response variable, were obtained from an experimental design. Results indicate that the reduction of thermal conductivity and increase of emissivity

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Wang, Fei, Jin Sheng Liang, Qing Guo Tang, Na Wang, and Li Wei Li. "Preparation and Properties of Thermal Insulation Latex Paint for Exterior Wall Based on Defibred Sepiolite and Hollow Glass Microspheres." Advanced Materials Research 58 (October 2008): 103–8. http://dx.doi.org/10.4028/www.scientific.net/amr.58.103.

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Thermal insulating latex paint for exterior wall was prepared by water as dispersing media, polyacrylic emulsion as basic material, defibered sepiolite and hollow glass microspheres as main functional additives. The thermal insulation effect and mechanism were studied by thermal insulation effect testing device and visible light reflectance tester. The results show that the optimum contents of functional additives are as follows: 8% defibred sepiolite fibers, 6% hollow glass microspheres. The coating could arrest heat transmission and reflect visible light effectively.

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Khoukhi, Maatouk, and Mahmoud Tahat. "Effect of Operating Temperatures on Thermal Conductivity of Polystyrene Insulation Material: Impact on Envelope-Induced Cooling Load." Applied Mechanics and Materials 564 (June 2014): 315–20. http://dx.doi.org/10.4028/www.scientific.net/amm.564.315.

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The impact of the thermal conductivity (k-value) change of polystyrene insulation material in building envelope due to changes in temperature on the thermal and energy performance of a typical residential building under hot climate is investigated. Indeed, the thermal and energy performance of buildings depends on the thermal characteristics of the building envelope, and particularly on the thermal resistance of the insulation material used. The thermal insulation material which is determined by its thermal conductivity, which describes the ability of heat to flow cross the material in presenc

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30

Cao, Jianmei, BaoShuai Du, Kui Li, and Zhibin Fan. "Effect of Thermo-Oxidative Ageing on Environment-Friendly Polypropylene-Based Cable Main Insulation Materials." Journal of Physics: Conference Series 3015, no. 1 (2025): 012022. https://doi.org/10.1088/1742-6596/3015/1/012022.

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Abstract This paper selects two types of polypropylene/elastomer blended commercial cable main insulation materials. Accelerated thermo-oxidative aging experiments at 135° C are carried out. The influence of thermo-oxidative aging on the macroscopic morphology, physicochemical properties, dielectric loss, frequency breakdown field strength and other parameters of the two types of polypropylene insulation is compared and analyzed. The evolution of the electrical performance of polypropylene blended insulation under thermo-oxidative aging is revealed. The test results show that at higher tempera

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Alderucci, Tiziana, Luigi Patrono, Piercosimo Rametta, and Placido Munafo. "The effectiveness of an internet of things-aware smart ventilated insulation system." Thermal Science 22, Suppl. 3 (2018): 909–19. http://dx.doi.org/10.2298/tsci170906024a.

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The considerable thicknesses of common insulation systems, applied to the internal or external building envelope, can be inappropriate in the Mediterranean climates for improving buildings? energy efficiency and their internal comfort at the same time; in fact, the high thicknesses of insulating material provided by legislation standards can be cause of environments? over-heating and formation of condensation. In this framework, the S-MUnSTa system is an innovative dynamic ventilated insulation system able to overcome condensation and overheating phenomena, also exploiting Internet of Things t

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Jiang, Zaijun, Xin Li, Heng Zhang, et al. "Research Progress and Prospect of Condition Assessment Techniques for Oil–Paper Insulation Used in Power Systems: A Review." Energies 17, no. 9 (2024): 2089. http://dx.doi.org/10.3390/en17092089.

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Oil–paper insulation is the critical insulation element in the modern power system. Under a harsh operating environment, oil–paper insulation will deteriorate gradually, resulting in electrical accidents. Thus, it is important to evaluate and monitor the insulation state of oil–paper insulation. Firstly, this paper introduces the geometric structure and physical components of oil–paper insulation and shows the main reasons and forms of oil–paper insulation’s degradation. Then, this paper reviews the existing condition assessment techniques for oil–paper insulation, such as the dissolved gas ra

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Liang, Fangwei, Hanhua Luo, Xianhao Fan, Xuetong Li, and Xu Wang. "Review of Surface Charge Accumulation on Insulators in DC Gas-Insulated Power Transmission Lines: Measurement and Suppression Measures." Energies 16, no. 16 (2023): 6027. http://dx.doi.org/10.3390/en16166027.

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Gas-insulated power transmission lines (GILs) can replace cables and overhead transmission lines, playing an important role in DC transmission systems. However, the influence of surface charge accumulation on insulation reliability cannot be ignored as the operational voltage of the DC GIL increases. In this paper, the measurement methods for the insulator surface potential are summarized, including, dust maps, the Pockels effect method, and the electrostatic probe method. Then, a typical surface charge inversion algorithm is introduced. The main influencing factors of surface charge accumulat

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Colombo, Isabella Giorgia, Matteo Colombo, and Marco Di Prisco. "TRC sandwich solution for energy retrofitting." Acta Polytechnica CTU Proceedings 33 (March 3, 2022): 98–104. http://dx.doi.org/10.14311/app.2022.33.0098.

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Concerning energy improvement of existing façades, a favourable system involves prefabricated multilayer panels, made of internal insulation core and outer textile reinforced concrete layers. It is a convincing alternative to external thermal insulation composite systems (ETICS) and ventilated façades, and it meets all the requirements for façade systems. The main advantage is the possibility toapply the panel using a crane, without any scaffolding. The paper considers two solutions: the former uses expanded polystyrene (EPS) as insulating material; the latter substitutes EPS with an innovativ

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Bu, Qinhao, Sheng Liu, Le Feng, Haowei Xu, and Qiaogen Zhang. "High Frequency Breakdown Characteristics of Alumina Filler Content Epoxy Resin." Advances in Engineering Technology Research 11, no. 1 (2024): 399. http://dx.doi.org/10.56028/aetr.11.1.399.2024.

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Power electronic transformers have high insulation frequency and compact insulation structure, and insulation performance is one of the main factors restricting their further development. Epoxy resin is an important insulating material in the electrical industry, its thermal conductivity and mechanical properties can not meet the needs of high-frequency transformers, usually metal oxide (Al2O3, etc.) is added to form composite insulation material. It is of great reference value for the insulation design of power electronic transformer to study the insulation performance of composite insulation

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Bilan, T., I. Rezvik, O. Sakhno, O. But, and S. Bogdanov. "Main Approaches to Cable Aging Management at Nuclear Power Plants in Ukraine." Nuclear and Radiation Safety, no. 4(84) (December 19, 2019): 54–62. http://dx.doi.org/10.32918/nrs.2019.4(84).07.

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The mechanisms of cable ageing at nuclear power plants (NPPs) mainly depending on the insulation material, as well as the damaging factors affecting cables that are determined by the operating conditions are considered in the paper. The main and additional mechanisms of aging resulting from the effects of damaging factors are provided. The paper presents the main methods of cable aging management: determining the actual service life and testing using field methods and other means. The basic principles for the arrangement of cable aging management at Ukrainian NPPs, as well as the methods used

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Zhang, Zhongyuan, Xiaohan Dai, Le Li, et al. "Current Status of Research on the Modification of Thermal Properties of Epoxy Resin-Based Syntactic Foam Insulation Materials." Polymers 13, no. 18 (2021): 3185. http://dx.doi.org/10.3390/polym13183185.

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As a lightweight and highly insulating composite material, epoxy resin syntactic foam is increasingly widely used for insulation filling in electrical equipment. To avoid core burning and cracking, which are prone to occur during the casting process, the epoxy resin-based syntactic foam insulation materials with high thermal conductivity and low coefficient of thermal expansion are required for composite insulation equipment. The review is divided into three sections concentrating on the two main aspects of modifying the thermal properties of syntactic foam. The mechanism and models, from the

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Golubev, Dmitry, Dmitry Kovalev, and Sergey Elfimov. "Development of a thermal model of a bus conductor with polymer-gas insulation for power transmission of offshore wind turns." Energy Systems 7, no. 3 (2022): 36–47. http://dx.doi.org/10.34031/es.2022.3.004.

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On the basis of the National Research University "MPEI", within the framework of the project to create a busbar with polymer-gas insulation for the transmission of electricity from offshore wind turbines, a study is being carried out to develop insulating structures for high-voltage busbars. The work is devoted to the development and justification of the design of a special conductor with combined insulation (polymer-gas) for laying in sea water for the transmission of electrical energy from wind turbines, where a polymer coating of current-carrying elements is used to increase the electrical

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Gao, Wei, and Zhong Tang. "Characteristic Analysis of the Insulation State of Single-Core XLPE Cables." Advanced Materials Research 805-806 (September 2013): 902–5. http://dx.doi.org/10.4028/www.scientific.net/amr.805-806.902.

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This paper investigates the state of insulation characteristic of single-core underground cable. The distributed model of single-core cable was built, which involved the insulation resistance and the leakage current. Based on the distributed model, sheath voltage and ground current on metallic sheath was examined under several kinds of insulation ageing such as various degree of insulation ageing occur in the main insulation, or in the sheath insulation, or partial insulation ageing. The results show that the voltage and current on metallic sheath indicate the degree and position of the ageing

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Melnikova, O. S., and V. S. Kuznetsov. "Method of calculating the electric strength of oil channels of the main insulation of power transformers." Vestnik IGEU, no. 5 (December 30, 2020): 48–55. http://dx.doi.org/10.17588/2072-2672.2020.5.048-055.

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The most damage-sensitive unit of power transformers is the main insulation of the oil barrier type. The breakdown of such insulation occurs as a result of the breakdown of the oil channel near the high voltage winding. In accordance with traditional methods of calculating the dielectric strength of insulation, the value of the breakdown strength is determined by empirical formulas depending on the selected width of the oil channel. The existing methods do not consider the influence of the oil channel volume, of the electric strength the statistical characteristics of the oil, the design featu

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Dulskiy, Evgeniy Yuryevich, Pavel Yuryevich Ivanov, Anatoliy Mikhaylovich Khudonogov, Nikolay Nikolaevich Novikov, and Marina Alexeevna Divinets. "Experimental studies of main electrotechnical parameters of insulation of electric locomotives traction motors at drying by different methods." Transport of the Urals, no. 3 (2020): 72–75. http://dx.doi.org/10.20291/1815-9400-2020-3-72-75.

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According to statistics more than 30 % of faults of freight electric locomotives are because of traction motors. One of the weak points in traction motor is the insulation. Insulation damages cause up to 75 % of all faults. The paper presents a comparison of two methods of traction motors insulation drying - a convective method and a method that uses thermal infra-red radiation, describes the principle of conducting the experiments, shows the analysis of main electrotechnical parameters of insulation samples after drying.

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Xing, Zhaoliang, Hao Ge, Fanqiu Zeng, Shaowei Guo, and Chunjia Gao. "Kerr Electro-Optic Effect-Based Methodology for Measuring and Analyzing Electric Field Distribution in Oil-Immersed Capacitors." Energies 17, no. 13 (2024): 3139. http://dx.doi.org/10.3390/en17133139.

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In the current design and verification processes of insulation structures for high-voltage oil-immersed capacitors, there is a heavy reliance on electric field simulation calculations using idealized models that lack empirical validation of spatial electric fields. This study employs the Kerr electro-optic effect to establish a non-contact optical remote sensing system for measuring the spatial electric field distribution in the insulating liquid dielectric (benzyltoluene) between the capacitor’s element and the case under various temperatures and main insulation distances. The findings reveal

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Varivodov, V. N., D. I. ,. Kovalev, D. V. Golubev, and E. M. Voronkova. "The Primary Aspects of Improving the Electrical Strength of Cast Epoxy Insulation on High-Voltage Devices." WSEAS TRANSACTIONS ON POWER SYSTEMS 17 (June 17, 2022): 103–16. http://dx.doi.org/10.37394/232016.2022.17.12.

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Various technical solutions are used to meet existing requirements for insulating high-voltage equipment, and the widespread introduction of solid insulation is one of them. Recently, there has been a noticeable wide transition to composite materials with improved strength properties. To justify the use of such materials, it is necessary to be guided by statistical laws of electrical strength distribution from various parameters, particularly the size of insulation, and its volume, to analyze breakdown probabilities. When selecting an appropriate type of material, one should also rely on the f

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Zhukov, Aleksey, Andrey Medvedev, ,. Alexey Poserenin, and Boris Efimov. "Ecological and energy efficiency of insulating systems." E3S Web of Conferences 135 (2019): 03070. http://dx.doi.org/10.1051/e3sconf/201913503070.

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The article, on the example of pipeline insulation systems, outlines the fundamentals of the concept of environmentally sustainable construction, including requirements for materials, constructional systems in which these materials are used, engineering systems and work technologies. Insulation based on polyethylene foam technology of its installation meets the requirements of EcoMaterial Basis or EcoMaterial Green. Polyethylene is absolutely safe for humans and its base is polyethylene, which used in the food industry (packaging or boxing) and in medicine (prosthetics). A specific feature of

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І.N. Babiy, L.V. Kucherenko, Yu.S Sokolan, А.S. Zalogina, and Sławomir Rabczak. "COMPARATIVE CHARACTERISTICS OF MODERN THERMAL INSULATION TECHNOLOGIES OF BUILDINGS." Journal of Civil Engineering, Environment and Architecture 38, no. 68 (2021): 17–25. http://dx.doi.org/10.7862/rb.2021.2a.

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Thermal insulation materials and technologies for thermal insulation of houses were investigated. The widespread use of such materials is due to the saving of fuel and energy resources, in particular, during the operation of buildings and structures. The subject of the analyzed stage of the research is the use of modern thermal insulation materials in construction, comparative characteristics of materials and processes associated with thermal insulation technologies. A list in the form of a table of the most used on the Ukrainian thermal insulation materials with comparative characterist

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ROMANIUK, V., and N. STRUTSKY. "THE PLACE OF INSULATION COATINGS IN ENSURING RELIABILITY STEEL UNDERGROUND GAS PIPELINES." Herald of Polotsk State University. Series F. Civil engineering. Applied sciences, no. 3 (December 28, 2023): 11–20. http://dx.doi.org/10.52928/2070-1683-2023-35-3-11-20.

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The article examines the issue of the place and role of insulating coatings in ensuring the reliability of steel underground gas pipelines. It has been shown that insulation is the main, basic means of protection against corrosion. A reliability model has been proposed for a linear section of a steel underground gas pipeline as a complex technical system consisting of unequal elements: a steel pipe as the main element that determines the operability/inoperability state of the system, and auxiliary protective elements – insulation and electrochemical protection, which reduce the level of corros

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Montanari, Gian Carlo, Muhammad Shafiq, Sukesh Babu Myneni, Maricela Lizcano, and Tiffany S. Williams. "Electrical Characterization of Boron Nitride-Filled Insulation for Aerospace and Avionics Applications." Energies 17, no. 12 (2024): 3016. http://dx.doi.org/10.3390/en17123016.

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The environmental challenges associated with high-power, high-voltage electrified aircraft require a targeted approach with regard to the development of next-generation aerospace electrical insulation. This study reports findings on polyphenylsulfone (PPSU) as a matrix material based on its unique thermal, mechanical, and dielectric properties, filled with hexagonal boron nitride (h-BN) with micron- and nanoscale particulates. The inorganic ceramic filler was selected for its thermally conductive and electrically insulating performance in extreme environments. The main goal was to investigate

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Mazur, Kamila Ewelina, Witold Jan Wardal, Jan Barwicki, and Mikhail Tseyko. "Thermal Insulation of Agricultural Buildings Using Different Biomass Materials." Energies 18, no. 3 (2025): 636. https://doi.org/10.3390/en18030636.

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The main goal of the article is to present the effectiveness of biomass as a thermal insulator and estimate the global potential for using biomass, considering the perspective of sustainable development and improving energy efficiency in agricultural building construction. The article presents two types of piggery construction: one using typical materials like concrete and the other using biomass-based materials. The evaluation is based on carbon footprint and embodied energy indicators. The model calculations developed in this article may be used in the future for life cycle assessment (LCA)

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Belghazdis, Mohammed, Mohammed El Khalfaouy, and El-Kaber Hachem. "Thermal insulation revolution in buildings between past and present: an updated review." Matériaux & Techniques 112, no. 1 (2024): 102. http://dx.doi.org/10.1051/mattech/2024006.

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Eco-design, sustainability and energy efficiency are emerging concepts that reflect the need to design new building solutions that are environmentally friendly and reduce material and energy consumption. Indeed, the probability of a massive climate change, capable of threatening the planet’s stability, is high if the current trend continues. The purpose of this study is to elucidate the main thermal insulation materials dominating the current market as well as their origins, strengths, and weaknesses. Additionally, the study identifies the criteria that make an insulator ideal and may be compe

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Prokhor, D. I., and N. V. Grachev. "Evaluation of the resource and characteristics of the insulation of traction motors of locomotives by means of accelerated heat aging method." PROCEEDINGS OF PETERSBURG TRANSPORT UNIVERSITY 18, no. 1 (2021): 80–94. http://dx.doi.org/10.20295/1815-588x-2021-1-80-94.

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Objective: An equivalent mode of accelerated thermal aging of the insulation system of electrical ma- chines is described to conﬁrm the resource corresponding to a given period and operating conditions. Methods: The equivalent mode of accelerated heat aging was determined based on the Montzinger rule and tested in the course of research and development work (R&D) on the development, manufacture and implementation of a set of bench and operational tests of the insulation system of an increased heat resistance class of a diesel locomotive traction motor. Results: The relevance of R&D has

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