公开(公告)号：US20210199224A1

公开(公告)日：2021-07-01

申请号：US17055259

申请日：2019-07-03

Applicant: ABB Power Grids Switzerland AG

Inventor： Anders C. Johansson ,  Magnus U. Henriksson ,  Anders Holmberg

IPC: F16L47/16 ,  B29C70/30 ,  B29C70/54 ,  B29C53/56 ,  F16L9/12

Abstract: The present disclosure relates to a fibre reinforced polymer (FRP) tube, the tube comprising a plurality of concentric layers of an FRP material forming a shell of the tube. At least one blind threaded longitudinal bolt hole is provided from a transverse end surface of the shell. The bolt hole extends in at least three of the plurality of layers, a middle layer encompassing a plane passing through a center of the bolt hole, an inner layer encompassing a plane of an innermost extent of the bolt hole, and an outer layer encompassing a plane of an outermost extent of the bolt hole. The fibre filament of each of the inner and outer layers has been wound at a first angle to the longitudinal axis and the fibre filament of the middle layer has been wound at a second angle to the longitudinal axis.

公开(公告)号：US20210166843A1

公开(公告)日：2021-06-03

申请号：US15734369

申请日：2019-06-05

Applicant: ABB Power Grids Switzerland AG

Inventor： Stefan Hortlund ,  Magnus U. Henriksson ,  Anders Holmberg ,  Andre Johansson

IPC: H01B17/56 ,  H01B17/42 ,  H01T4/04

Abstract: Shatter protection for a high voltage apparatus with a ceramic insulator includes at least one electrically insulating tube including a plurality of holes going through an envelope surface. The electrically insulating tube has a diameter such that there is a minimum distance between the tube and the ceramic insulator when arranged concentrically. A method for producing a shatter protection includes winding a first helix shape of the electrically insulating fiber composite material at a first pitch such that there is a first gap between the winding turns, and winding a second helix shape of the electrically insulating fiber composite material onto the first helix shape in the opposite direction and at a second pitch, such that there is a second gap between the winding turns. Thereby forming a first electrically insulating tube with holes formed by the first and second gap between the winding turns.