Difference between vacuum pouring dry type transformer and epoxy resin casting dry type transformer
First the dry-type transformer is divided into two kinds, one is using epoxy resin transformer coil encapsulation, said encapsulation type dry, one is the paint impregnated insulation coil, called open dry. The two should be carried out under vacuum, when necessary even for coil in a vacuum the container pressure treatment.
Epoxy cast dry-type transformer is under vacuum (absolute pressure 100-300pa) with epoxy resin, if the working voltage of products is low, can be in the atmospheric state (absolute pressure 101325pa). Because of the pouring of a dry insulation filling material becomes used are epoxy resin, so that the "vacuum casting dry type transformer is used to achieve this product > > < epoxy casting process, other electrical (voltage 35kV and below) and electronic insulation treatment mostly by vacuum epoxy casting process.
Vacuum pouring dry type transformer and epoxy resin casting dry type transformer should not have qualitative distinction, use all is insulation. At present, the vast majority of dry type transformers in the market are vacuum epoxy resin casting dry-type transformers, which are seldom poured by other insulating materials.
