公开(公告)号：US20210350967A1

公开(公告)日：2021-11-11

申请号：US17178407

申请日：2021-02-18

Applicant: ABB Power Grids Switzerland AG

Inventor： Lukasz Michalski ,  Pawel Klys ,  Robert Daszkiewicz ,  Adam Stelmasiak

IPC: H01F27/06 ,  H01F27/24 ,  H01F27/32

Abstract: A transformer core frame is provided with a reinforcement structure to form a reinforced transformer core frame. The reinforcement structure comprises one or several reinforcement panels comprising a honeycomb structure and affixed to the transformer core frame. A method of producing a reinforced transformer core frame is also described.

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.