Revista Organizações em Contexto (ROC) - Diretoria de Pesquisa e Pós-Graduação - Universidade Metodista de São Paulo - UMESP.
ISSN Versão Eletrônica 1982-8756
ISSN Versão Impressa 1809-1040 (2005-2008)
Este obra está licenciado com uma Licença Creative Commons Atribuição-NãoComercial 4.0 Internacional.
Backyard Revolution
por Ssregina Regina Regina (30-04-2019)
Typical Applications: Oil-filled Backyard Revolution Review transformers, thanks to their lower purchase costs, find applications in literally every sort of power distribution. Of late, the awareness of the fire risks associated with mineral oil-filled transformers has created a movement towards safer alternatives that use non-flammable, biodegradable liquids, or even dry-type transformers. Non-Flammable Liquid-Filled Transformers polychlorinated biphenyl (PCBs) were produced in large quantities starting as early as the 1930s, in response to the electrical industry's need for a less flammable substitute for mineral oil as a cooling/insulating fluid for transformers. Several industrial incidents, however, brought the toxicity of PCBs to the fore. As confirmed organic pollutants, PCBs were banned by the late 1970s. A number of alternatives have since surfaced - major ones being silicone, perchloroethylene, high temperature hydrocarbons, and mixtures of oil with perchloroethylene. The first high molecular-weight hydrocarbon-based fluid (HMWH), was introduced in 1975. This fluids possesses similar dielectric properties as mineral oil, provide remarkable levels of fire-resistance, and do not have undesirable environmental fallouts. Typical Applications Non-flammable liquid-filled transformers can be installed indoors and outdoors, close to buildings, walkways and rooftops. Usually, no additional infrastructure is required to address issues like fire safety. Biodegradable Fluid Liquid-Filled Transformers Animal fats and vegetable oils offer substitutes that are significantly less harmful to the environment than petroleum oils. However, vegetable oils were not used in transformers for a long time; a fluid which could be stable in the transformer environment and available in the required quantities was simply not available.Transformer manufacturers have since worked on transformer designs that utilize vegetable oil-based dielectric fluids.
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