Switchgear Device Having at Least One Single-Pole Breaking Unit Comprising a Contact Bridge and Circuit Breaker Comprising One Such Device

摘要

Switchgear device having at least one single-pole breaking unit, said unit comprising a movable contact bridge, a pair of stationary contacts operating in conjunction with said movable contact bridge and respectively connected to a current input conductor, and two arc extinguishing chambers respectively opening onto an opening volume of the contact bridge, and comprising a stack of at least two deionizing fins separated from one another by a gas exchange space. Each extinguishing chamber is connected to at least one quenching gas exhaust channel, said exhaust channels opening onto a line-side panel of the case of the breaking unit, said line-side panel being positioned opposite another load-side panel designed to be placed in contact with trip means.