A MEDIUM VOLTAGE SWITCHING APPARATUS

A switching apparatus for medium voltage electric systems, said switching apparatus comprising one or more electric poles and, for each electric pole:- a first pole terminal, a second pole terminal and a ground terminal, said first pole terminal being electrically couplable with a first conductor of an electric line, said second pole terminal being electrically couplable to a second conductor of said electric line and said ground terminal being electrically couplable to a grounding conductor;- a fixed contact assembly including a plurality of fixed contact members spaced one from another;- a movable contact assembly rotatable about a rotation axis between a first end-of-run position (PA), which corresponds to a closed state of said switching apparatus, and a second end-of-run position (Pc), which corresponds to a earthed state of said switching apparatus, said movable contact assembly passing through an intermediate position (PB), which corresponds to an open state of said switching apparatus, when moving between said first and second end-of-run positions.The movable contact assembly is arranged so that, when the switching apparatus is in an open state, the electric contacts within a vacuum chamber of the movable contact assembly are mutually coupled.