公开(公告)号：US20190172668A1

公开(公告)日：2019-06-06

申请号：US16253367

申请日：2019-01-22

Applicant: ABB Schweiz AG

Inventor： Bernardo Galletti ,  Manuel Gotti ,  Markus Bujotzek ,  Martin Seeger

IPC: H01H33/70

CPC classification number: H01H33/7023 ,  H01H33/91

Abstract: A gas-insulated high-voltage switching device which includes an arcing contact arrangement having a first arcing zone member and a second arcing zone member that are movable relative to one another along an axis. An auxiliary nozzle surrounds at least a part of a second arcing contact unit and has an auxiliary nozzle throat having an axial extension and allowing passage at least of an end of the first arcing contact unit. A main nozzle throat has an axial extension sideways of the auxiliary nozzle throat and allows passage at least of the end of the first arcing contact unit. A cross-sectional area of the main nozzle throat is substantially decreasing in the direction away from the auxiliary nozzle throat so as to form a substantially converging duct for the flow of an arc-extinguishing gas.