An electric switching system comprising: - a first, a second and a third input terminal, - a first, a second and a third output terminal, - an electric switching module comprising: + two first switches and two second switches, each electric switch (30, 32) being capable of switching between an open position and a closed position and comprising a fixed input contact (34A, 38A), a fixed output contact (34B, 38B) and a mobile contact (36, 40), the contacts (34A, 34B, 36, 38A, 38B, 40) being electrically conductive, the two fixed contacts (34A, 34B, 38A, 38B) being able to be electrically connected via the mobile contact (36, 40) in closed position of the electric switch (30, 32) and electrically insulated from each other in open position of the electric switch (30, 32), + a holder member for holding the mobile contacts (36, 40), the holder member being able to be moved by an electric driving device between a first position corresponding to a position among the open and closed positions of the switch (30, 32) and a second position corresponding to the other of the positions among the open and closed positions of the switch (30, 32) so as to ensure simultaneous switching of the electric switches (30, 32), the holder member comprising a first mechanical coupling element (60A, 62A) with the electric driving device in a primary configuration (A1, A3) of the driving device relative to the switching module, and - a control module for controlling the switching module, the first and second input terminals (12A, 12B) each being electrically connected to a fixed input contact of a respective first electric switch and to a fixed input contact of a respective second electric switch, and the first and second output terminals (14A, 14B) each being electrically connected to a fixed output contact of a respective first electric switch and to a fixed output contact of a respective second electric switch, so as to connect the first input terminal to the first output terminal and the second input terminal to the second output terminal in closed position of the first switches, and to connect the first input terminal to the second output terminal and the second input terminal to the first output terminal in closed position of the second switches, the third output terminal being electrically connected to the third input terminal, characterized in that the holder member comprises a second mechanical coupling element (60B, 62B) for mechanical coupling with the electric driving device in a secondary configuration (A2, A4) of the driving device relative to the switching module, in that the control module comprises the electric driving device, and in that the holder member is mechanically coupled to the driving device via the first coupling element (60A, 62A) in the primary configuration (A1, A3) of the control module relative to the switching module, or else via the second coupling element (60B, 62B) in the secondary configuration (A2, A4) of the control module relative to the switching module. - a first, a second and a third input terminal, - a first, a second and a third output terminal, - an electric switching module comprising: + two first switches and two second switches, each electric switch (30, 32) being capable of switching between an open position and a closed position and comprising a fixed input contact (34A, 38A), a fixed output contact (34B, 38B) and a mobile contact (36, 40), the contacts (34A, 34B, 36, 38A, 38B, 40) being electrically conductive, the two fixed contacts (34A, 34B, 38A, 38B) being able to be electrically connected via the mobile contact (36, 40) in closed position of the electric switch (30, 32) and electrically insulated from each other in open position of the electric switch (30, 32), + a holder member for holding the mobile contacts (36, 40), the holder member being able to be moved by an electric driving device between a first position corresponding to a position among the open and closed positions of the switch (30, 32) and a second position corresponding to the other of the positions among the open and closed positions of the switch (30, 32) so as to ensure simultaneous switching of the electric switches (30, 32), the holder member comprising a first mechanical coupling element (60A, 62A) with the electric driving device in a primary configuration (A1, A3) of the driving device relative to the switching module, and + two first switches and two second switches, each electric switch (30, 32) being capable of switching between an open position and a closed position and comprising a fixed input contact (34A, 38A), a fixed output contact (34B, 38B) and a mobile contact (36, 40), the contacts (34A, 34B, 36, 38A, 38B, 40) being electrically conductive, the two fixed contacts (34A, 34B, 38A, 38B) being able to be electrically connected via the mobile contact (36, 40) in closed position of the electric switch (30, 32) and electrically insulated from each other in open position of the electric switch (30, 32), + a holder member for holding the mobile contacts (36, 40), the holder member being able to be moved by an electric driving device between a first position corresponding to a position among the open and closed positions of the switch (30, 32) and a second position corresponding to the other of the positions among the open and closed positions of the switch (30, 32) so as to ensure simultaneous switching of the electric switches (30, 32), the holder member comprising a first mechanical coupling element (60A, 62A) with the electric driving device in a primary configuration (A1, A3) of the driving device relative to the switching module, and - a control module for controlling the switching module,