公开(公告)号：US20180330871A1

公开(公告)日：2018-11-15

申请号：US15524218

申请日：2015-11-04

Applicant: ABB Schweiz AG

Inventor： Rudi Velthuis ,  Manjo Pradhan ,  Orlando Girlanda ,  Jens Rocks ,  Harald Martini ,  Jan Van Loon

IPC: H01F27/32 ,  H01F27/30

CPC classification number: H01F27/324 ,  H01F27/10 ,  H01F27/2871 ,  H01F27/306 ,  H01F27/322

Abstract: An insulation system for an electrical power transformer that includes at least a non-cellulose based axial spacer. The axial spacer may include a pair of spacer arms that extend from a base wall of the axial spacer. Additionally, the spacer arms and the base wall may generally define a hollow inner region of the axial spacer, thereby reducing the volume of the axial spacer. According to certain embodiments, the spacer may include lips that are adapted to lockingly engage a radial spacer. Additionally, at least a portion of the axial spacer and the radial spacer may be constructed from a thermoplastic and/or a thermoset plastic. Further, according to certain embodiments, another portion of the axial spacer, such as, for example, the lips, may be formed from a flexible thermoplastic elastomer or a thermoset elastomer so as to provide the axial spacer with a combination of both flexibility and stiffness.