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.