公开(公告)号：US20210391117A1

公开(公告)日：2021-12-16

申请号：US17279611

申请日：2019-09-24

Applicant: ABB Power Grids Switzerland AG

Inventor： Uwe Drofenik ,  Thomas Gradinger

IPC: H01F27/32 ,  H01F27/24 ,  H01F41/066 ,  H01F41/12 ,  H01F41/00

Abstract: A transformer is described. The transformer includes a transformer core having a core leg having a longitudinal axis, a low voltage winding arranged around the core leg, the low voltage winding extending along a first length in the direction of the longitudinal axis, a high voltage winding arranged around the low voltage winding, the high voltage winding extending along a second length in the direction of the longitudinal axis, wherein the second length is shorter than the first length, and a casting embedding the low voltage winding and the high voltage winding. The casting has a recess. The recess is provided at a radial location of the high voltage winding and the recess extends in the direction of the longitudinal axis.