公开(公告)号：EP3618088A1

公开(公告)日：2020-03-04

申请号：EP18191753.5

申请日：2018-08-30

Applicant: ABB Schweiz AG

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

IPC: H01H33/70

Abstract: A gas-insulated high or medium voltage circuit breaker (100) comprising: a first arcing contact (101) and a second arcing contact (102), wherein at least one of the two arcing contact is axially movable along a switching axis (110), wherein during a breaking operation, an arc (120) between the first arcing contact (101) and the second arcing contact (102) is formed in a arcing region (125); a buffer housing (130) defining a pressurizing volume (140); a nozzle (150) arranged at a nozzle side (152) of the pressurizing volume (140), the nozzle (150) defining a channel (153) connected to the pressurizing volume (140) and directed to the arcing region (125), for blowing an arc extinguishing gas towards the arcing region (125) during the breaking operation, the nozzle (150) comprising a nozzle front face (160) facing towards the interior (180) of the pressurizing volume (140).