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Electrical insulation system is an important part of electrical equipment with high requirements — accuracy, quality, reliability and environmental protection. In power and distribution transformers is the most common electrical insulating system oil-paper system. The liquid component of the insulation system is used as a cooling and insulating medium as well. The most commonly used liquid insulating...
Natural esters are candidate fluids for transformer insulation system. Recently the most common insulation system in power transformers is paper-oil system. Oil generally mean petroleum based insulating fluid. As there are efforts to preserve sustainable development, crude oil products should be eliminated and replaced by natural products, which are easily biodegradable. In past it was shown that...
Natural esters are candidate element of transformer insulation system. Recently most common insulation in power transformers is composed of mineral oil and transformer paper. As there are efforts to preserve sustainable development, crude oil products should be eliminated and replaced by natural products, which are easily biodegradable. In past, it was shown, that natural esters may reach qualities...
Mineral oils, which are currently used as electrical insulation liquids, have due their uneasy biodegradability significantly negative impact on ecology and human health. Thus it is necessary to search for new possible liquids based on vegetable oils or natural esters, which might substitute crude oil products in practical applications. These liquids are easy biodegradable while economically acceptable...
Mineral oils are traditionally used in transformer insulation systems. As they are uneasily biodegradable, they have negative influence on environment, when transformer failure happens. There are also alternative electrical insulation liquids, which may help in some areas, however their properties may not fulfill the all requirements. This paper is comparing properties of these alternative insulation...
Partial discharge measurement and subsequent analyses is one of important and capable test of electro-technological diagnostics. This test evaluates the properties of electrical insulation system of electrical machines and devices. There are a lot of partial discharge test methods based on physical or chemical detection of partial discharge. Described experiment consists of laboratory testing of partial...
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