TRANSFORMER, ESPECIALLY A RESIN-ENCAPSULATED TRANSFORMER

摘要

Air-cooled transformers usually have a higher-voltage winding (3) consisting of a number of coils (16), with a plastic film (18) as a turn and/or layer insulation. According to the invention, the plastic film (18) inside the top coil (16) is thermally more resistant than the plastic film (18) in the bottom coil (16) in accordance with the respective thermal load of the top and bottom coil (16) during operation, in order to improve economical efficiency.