Transformer main insulation structure with singly placed medium-voltage regulating winding

The utility model relates to a transformer main insulation structure with a singly placed medium-voltage regulating winding, belonging to the technical field of transformers. The technical scheme is as follows: each phase of winding is sequentially provided with a low-voltage winding (2), a medium-voltage regulating winding (3), a medium-voltage regulating winding (4), a high-voltage winding (5) and a high-voltage regulating winding from outside to inside, wherein the heads of the low-voltage winding, the medium-voltage regulating winding and the medium-voltage winding are guided axially, the head of the high-voltage winding is guided radially, the high-voltage regulating winding comprises an upper-half part winding and a lower-half part winding which are connected in parallel, and the medium-voltage regulating winding is placed in a hollow channel between the low-voltage winding and the medium-voltage winding. According to the transformer main insulation structure, the difficulty that the medium-voltage regu