Mineral Insulating Oil
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. AVALIAÇÃO DOS RESÍDUOS GERADOS DURANTE A DESTRUIÇÃO DE PCBS PELO PROCESSO CATALISADO POR BASE
There are many processes capable of decontamination of polychlorinated biphenyls in several matrixes. The set of inputs, materials, operation conditions and efficiencies are wide. The base catalyzed dechlorination process shows application potential in great scale, mainly due mild chemical reaction conditions and low cost raw materials. The KPEG is a familia
Quím. Nova. Publicado em: 2018-06
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2. Correlation between stabilizer consumption and degree of polymerization of thermally upgraded paper aged in insulating natural ester and insulating mineral oil
Abstract Insulating paper holds significant importance in the insulation system of power transformers, and thus, its degradation is the subject of many studies. A successful evaluation of the degradation rate of such paper contributes to reducing downtime and avoiding equipment failure. In this work, samples of thermally upgraded paper were thermally aged in
Polímeros. Publicado em: 04/03/2016
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3. SIMULATION OF THERMAL DECOMPOSITION OF MINERAL INSULATING OIL
Abstract Dissolved gas analysis (DGA) has been applied for decades as the main predictive maintenance technique for diagnosing incipient faults in power transformers since the decomposition of the mineral insulating oil (MIO) produces gases that remain dissolved in the liquid phase. Nevertheless, the most known diagnostic methods are based on findings of sim
Braz. J. Chem. Eng.. Publicado em: 2015-09
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4. DEVELOPMENT OF INSULATING MAGNETIC OIL FOR TRANSFORMERS
The Centrais Elétricas do Norte do Brasil AS – Eletronorte, as well as other companies in the world energy sector, have problems of loss of the performance by excessive heat and even accidents with their transformers. The maintenance and accidents impact of energy supply, generating profit and more expensive insurance premiums. The transformers are essent
Publicado em: 20/07/2014
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5. DIAGNOSIS OF FAULTS IN POWER TRANSFORMERS USING SEMICONDUCTOR GAS SENSORS. / DIAGNÓSTICO DE FALHAS EM TRANSFORMADORES DE POTÊNCIA UTILIZANDO SENSORES DE GAS SEMICONDUTORES.
Esta dissertação introduz o estudo do uso de uma matriz de sensores de gases de dióxido de estanho na detecção de falhas em transformadores de potência, através dos gases dissolvidos no óleo. O objetivo desta pesquisa é analisar os dados obtidos pelos sensores de gás, utilizando algumas técnicas de reconhecimento de padrão, e desta forma, verific
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/08/2012
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6. Estudos sobre gases dissolvidos em óleos vegetais isolantes - influência de arco elétrico e superaquecimento / Dissolved gases analysis in insulating oils - the influence of electric arc and overheating
A inovação tecnológica é uma ferramenta muito poderosa utilizada para avançar estrategicamente no mundo competitivo. Esta tendência também é uma realidade nos sistemas de isolamento dos transformadores. Os isolamentos passam então a ser avaliados tanto do ponto de vista econômico, quanto do ambiental e da segurança. Em todo o mundo, são consumido
Publicado em: 2011
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7. DECISION SUPPORT SYSTEM FOR THE DIAGNOSIS OF FAULTS IN POWER TRANSFORMERS / SISTEMA DE APOIO À DECISÃO PARA O DIAGNÓSTICO DE FALTAS EM TRANSFORMADORES DE POTÊNCIA
Given the complexity of the Brazilian energy matrix and in particular of the whole interconnected electrical power system, it is essential to ensure that the equipment, from generation to final consumers, operates in a satisfactory way and high levels of reliability. In accordance with the restructuring of the sector and its integration in a competitive mark
Publicado em: 2009
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8. Caracterização de bauxita ativada antes e depois da saturação com óleo mineral isolante
A characterization of activated bauxite and of activated bauxite impregnated with insulating mineral oil was made. The activated bauxite is used as adsorbent material in percolators during the regeneration of insulating mineral oil. After regeneration an insulating mineral oil is obtained with physical and chemical characteristics similar to those of the new
Química Nova. Publicado em: 2008
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9. Ação adsorvente da bauxita sobre óleo isolante novo
Samples of new insulating mineral oil, after contact with bauxite, were analyzed by visible spectrophotometry, impedance spectroscopy and their total acidity index was measured. The results of these analyses were compared to samples of new insulating mineral oil, which had not been in contact with bauxite. The comparison demonstrated that the bauxite didn't
Química Nova. Publicado em: 2005-06
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10. Study of apodization of piezoeletric ceramics / Estudo da apodização de ceramicas piezoeletricas
The objective of this work was to optimize the process of apodization of piezoelectric ceramics disks, looking for the better relation between the insulating oil bath temperature and the smaIlest period of time through which the poling field must be applied. The apodization of the piezoelectric ceramic is performed to reduce the diffraction in the acoustic f
Publicado em: 2003