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Dry-type transformers and the difference between the transformer
2011-02-18 by seoer1
"Of course the same is all Power Transformer , there will be core for the magnetic circuit for the circuit winding. The biggest difference is in the" oil-type "and" dry. "Means that the cooling medium between the two different The former is based on transformer oil (of course there are other oils such as β oil) as a cooling and insulating medium, which is air or other gases such as SF6, etc., as the cooling medium. oil change is the composition of the iron core and winding the body of home in a tank filled with transformer oil. dry change often the core and winding up with a casting resin encapsulation, but also a much more now with non-encapsulated type, winding insulation sheet of paper with a special dedicated impregnated insulating paint, etc., serve to prevent damp windings or core. (also because the two are due to technology, use of different classification structure derived from different categories, so we from the narrow point of view) for the production and use for currently only done dry change voltage 35kV, the capacity is relatively smaller oil change, about done 2500kVA. Also, because the manufacturing process is relatively dry with variable voltage level with the capacity of the oil change is more complex, the cost is high. So is still present from the amount of oil becomes more positive. but dry change of environmental protection, flame retardant, impact and so on merit, and commonly used in indoor places high requirements for Electrical Distribution Transformers, such as hotels, office buildings, high-rise buildings, etc. . If you just transformer users aware of these should be enough "
keywords:electric distribution transformer