The invention relates to a high or medium-voltage electric switch, in particular a GIS-type breaker embodied in the form of a tree-position switch having a ground position comprising a tightly closed casing (1) filled with a dielectrically insulating gas, a switching element (7) which is axially movable in a direction (D) for electrically connecting two conducting bars (4, 5) remote from each other and comprises a fixed ground terminal (6) electrically connectable to one of the conducting bars by means of said switching element when the switch is connected to the ground. The fixed ground terminal (6) is offset with respect to the axial travel direction of the switching element (7) which forms Y with a contact finger (8) in such a way that said contact finger and the fixed ground terminal are insertable into each other by the displacement of the switching element along said axial direction. |