公开(公告)号：US20220102058A1

公开(公告)日：2022-03-31

申请号：US17488577

申请日：2021-09-29

Applicant: ABB Power Grids Switzerland AG

Inventor： Ion Radu ,  Parag Upadhyay ,  Alberto Prieto

IPC: H01F27/28 ,  H01F41/063

Abstract: A split winding assembly for a transformer is configured to extend along a main limb of a transformer core between a first end and a second end. The split winding assembly includes a first split winding section extending from the first end toward a midpoint of the split winding assembly and a second split winding section extending from the second end toward the midpoint of the split winding assembly along the main limb of a transformer core. The first split winding section includes a first inner winding section configured to surround the main limb of the transformer core and a first outer winding section surrounding the first inner winding section. The second split winding section includes a second inner winding section configured to surround the main limb of the transformer core and a second outer winding section surrounding the second inner winding section.

公开(公告)号：US20210375524A1

公开(公告)日：2021-12-02

申请号：US17331706

申请日：2021-05-27

Applicant: ABB Power Grids Switzerland AG

Inventor： Robert Daszkiewicz ,  Pawel Klys ,  Alberto Prieto

IPC: H01F27/28 ,  H01F27/02

Abstract: A three-phase transformer including a transformer housing, a shell-form five-limb transformer core wherein main limbs include two outer main limbs and a middle main limb, three coil arrangements including two outer coil arrangements each arranged around a respective one of the outer main limbs, and a middle coil arrangement arranged around the middle main limb. The outer coil arrangements have an inter-coil insulation configured to electrically insulate the coil arrangements from the transformer housing and from the respective other ones of the coil arrangements, and wherein no inter-coil insulation is provided to the middle coil arrangement.