PURPOSE: To provide the heterocapacitance load three-phase Scott connection transformer in which weight and loss are reduced, and the space of installation is also reduced.

CONSTITUTION: The transformer consists of a three-phase transformer 4, on which primary windings 2U, 2V and 2W and secondary windings 3u, 3v and 3w are wound on a core 1, and a Scott connection transformer 13 on which a main primary winding 7 and a main secondary winding 8 are wound on the core of the main transformer and a T-coordinate primary winding 11 and a T-coordinate secondary winding 12 are wound on the core of a T-coordinate transformer 9. The primary winding, consisting of the primary windings 2U, 2V and 2W of the three-phase transformer 4, the main primary winding 7 and the T-coordinate primary winding 11 of the Scott connection transformer 13, is connected in three-phase parallel. Three-phase output is obtained from the secondary windings 3u, 3v and 3w of the three-phase transformer 4, two-phase single-phase output is obtained from the main-coordinate secondary winding 8 and the T-coordinate secondary winding 12 of the Scott connection transformer 13 in the heterocapacitance load three-phase Scott connection transformer.