抄録
The application of SF6, -gas-immersed transformer is increasing rapidly instead of oil-immersed transformer, for prevention disasters and nonflamability of substations. Authors have developed middle-capacity SF6-gas-immerced transformer with sheet winding as far as 66kV/20MVA class, to save the expert skill for disk winding and to reduce kind and number of parts and product lead time.
Firstly this paper describes the essential techniques for middle-capacity SF6-gas-immersed transformer of analysis and measuring results of prototype about current density and leakage magnetic flux distribution at the edge and insulation characteristics at the edge and layers of sheet winding, and secondly, the good results of three-phase verification-type transformer.
