Acording windings to distinguish oil immersed transformer

oil immersed transformer can be divided into double-winding transformer and three winding transformer. The usual transformers are dual-winding transformers, that is, there are two windings on the core, one for the original winding, one for the secondary winding. Three-winding transformers are larger capacity transformers (above 5600 kVA) to connect three different voltage lines. In special cases, there are also Satons transformers that use more windings.