Crossarms
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Laminated composite based on polyester geotextile fibers and polyurethane resin for coating wood structures
New environmental laws have restricted the use of hardwood trees in overhead power lines structures, such as, poles and cross-arms, leading companies to seek alternative materials. Reforested wood coated with polymeric resin has been proposed as an environmental friendly solution, with improved electrical properties and protection against external agents, e.
Mat. Res.. Publicado em: 21/06/2013
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2. Telescopic continuum robot for tasks at high positions. / Robô contínuo telescópico para tarefas em alturas elevadas.
Among several applications of robots in the service field, it is possible to percept an increasing interest in manipulate tools in higher positions using automatic devices, due to the fact that such activities are high risked operations and demands the use of several safety equipments. The most common examples of this kind of activity are the inspection of m
Publicado em: 2009
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3. Cruzetas de polímeros reciclados: caracterização dos materiais, análise numérica e ensaios de modelos reduzidos / Recycled polymer crossarms: characterization of the materials, numerical analysis and tests in reduced models
Nowadays, wood is still the most used material in crossarms of aerial power distribution lines in Brazil. However, it has caused problems to power utilities concerning (i) degradation due to defects and attacks of fungi and insects, (II) higher operational costs to replace damaged pieces and (III) environmental problems, as the raw material has become scarce
Publicado em: 2007
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4. Wood cross-arms coated with polyurethane resin - tests and numerical simulations
Brazil's electric power utilities have commonly employed native timbers as the main material for manufacturing cross-arms for distribution lines. However, the increasingly high costs of these timbers and Brazil's new environmental laws have contributed to change this situation, spurring research on new materials for application in transmission and distributi
Materials Research. Publicado em: 2006-03
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5. Análise de estruturas de madeira, com e sem impregnação de resina poliuretana derivada do óleo de mamona, aplicadas em linhas de distribuição de energia elétrica / Wooden analysis of structures, with and without polyurethane resin impregnation derivative of the oil of mamona, applied in lines of distribution of electric energy
The power supply dealership companies live together with high maintenance costs on electrical systems, in private one of reasons is linked to the cost and durability of wood crossarms, either in its initial installation, either in its exchange that can occur frequently, having the necessity of noble wood use in principles which, beyond the price, suffer envi
Publicado em: 2006