Quenching chamber of a medium-voltage switch disconnector

A quenching chamber of a medium voltage switch disconnector, whose body of a gassing material is formed into a solid of a shape similar to a rectangular prism having a top wall, a bottom wall, a front wall, a back wall and side walls, comprising a body having a hollow arcing knife channel, a hollow arc chamber and a hollow socket, and furnished with an arcing contact unit located in the hollow socket, characterized in that the hollow arc chamber extends directly along the hollow arcing knife channel, from the back wall of the chamber and the hollow arc chamber is connected within the hollow arcing knife channel by a gap of a width of (s), forming a flat funnel whose height in a plane parallel to a surface of each said side wall decreases with an increase in a distance to the hollow arcing knife channel, a width of the gap in a plane perpendicular to the surface of each said side wall being less than a width of the hollow arcing knife channel measured in a plane perpendicular to the side walls of the body, respectively.