公开(公告)号：US20210265122A1

公开(公告)日：2021-08-26

申请号：US17253349

申请日：2019-08-28

Applicant: ABB Power Grids Switzerland AG

Inventor： Jakub Korbel ,  Olaf Hunger ,  Reto Karrer ,  Henrik Dahlgren ,  Alexey Sokolov ,  Giang PhamVan

IPC: H01H33/74 ,  H01H33/53

Abstract: A gas-insulated high or medium voltage circuit breaker comprising: a first arcing contact and a second arcing contact, wherein at least one of the two arcing contact is axially movable along a switching axis, wherein during a breaking operation, an arc between the first arcing contact and the second arcing contact is formed in a arcing region; a buffer housing defining a pressurizing volume; a nozzle arranged at a nozzle side of the pressurizing volume, the nozzle defining a channel connected to the pressurizing volume and directed to the arcing region, for blowing an arc extinguishing gas towards the arcing region during the breaking operation, the nozzle comprising a nozzle front face facing towards the interior of the pressurizing volume.