Transformer fluids

Historically, the standard fluids used in transformers were low-viscosity, petroleum-based oils. For many years, askarels, made up of a group of synthetic, fire-resistant fluids, were used in applications where flammable mineral oils were not desired or acceptable. These askarals, which were aromati...

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Bibliographic Details
Published inIEEE electrical insulation magazine Vol. 5; no. 4; pp. 16 - 19
Main Authors Claiborne, C.C., Pearce, H.A.
Format Magazine Article
LanguageEnglish
Published IEEE 01.07.1989
Subjects
Dielectric materials
Dielectrics and electrical insulation
Electrical equipment industry
Flammability
Hydrocarbons
Minerals
Oil insulation
Petroleum
Power generation
Power transformer insulation
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Summary:Historically, the standard fluids used in transformers were low-viscosity, petroleum-based oils. For many years, askarels, made up of a group of synthetic, fire-resistant fluids, were used in applications where flammable mineral oils were not desired or acceptable. These askarals, which were aromatic hydrocarbons known as polychlorinated biphenyls (PCBs), fell into disfavor owing to environmental concerns. The transformer industry turned first to dimethyl silicone fluids and then to less flammable hydrocarbons, such as high-molecular-weight, high-temperature hydrocarbons. Tetrachloroethylene (C/sub 2/Cl/sub 4/) is another nonflammable transformer fluid that has been introduced commercially. Chlorofluorocarbons and synthetic hydrocarbons have also been used as transformer fluids. The characteristics and properties of the various materials that have been used for cooling transformers are discussed.< >
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:0883-7554
1558-4402
DOI:10.1109/57.35599