公开(公告)号：EP2791958A1

公开(公告)日：2014-10-22

申请号：EP12798769.1

申请日：2012-12-12

Applicant: ABB Technology AG

Inventor： PISU, Franceso ,  GALINDO-LOZANO, Francia ,  MANTILLA, Javier ,  BUERGLER, Mathias-Dominic ,  GARIBOLDI, Nicola ,  COSSALTER, Oliver ,  STOLLER, Patrick ,  GROB, Stephan ,  KOTILAINEN, Sami

IPC: H01H33/90 ,  H01H33/95 ,  H01H33/22 ,  H01H33/91

CPC classification number: H01H33/22 ,  H01H33/90 ,  H01H33/901 ,  H01H33/903 ,  H01H33/91 ,  H01H33/95 ,  H01H2033/908 ,  H01H2033/912

Abstract: The present invention relates to a circuit breaker comprising an ejection device (8, 9; 80, 90) comprising a compartment (14a), in which an arc-extinction medium (18; 18a, 18b) for improving circuit breaker operation is contained, and having an ejection orifice (17) through which the arc-extinction medium (18; 18a, 18b) is to be ejected, wherein the ejection orifice (17) opens out into an injection zone (5, 6, 71) of the circuit breaker (1) in which the pressure is lower than in an arcing zone (32) when an arc is present, and wherein the arc-extinction medium (18; 18a, 18b) and/or exhaust-cooling medium (18; 18a, 18b) is at least partially present in liquid form, when it is contained in the ejection device (8, 9; 80, 90).