Abstract: A socket-outlet (10) that extends along an axial direction (X) and that includes at least one housing (18c) that is configured to receive a pin (94) of a plug (90), and a safety disk (12) that is movable in turning between a protection position that prevents access to said housing (18c) and a connection position that allows access to said housing (18c). The socket-outlet (10) includes a turning device (12c1, 14, 14a) for turning the safety disk (12), which turning device is configured to co-operate with the plug (90), the turning device bringing the safety disk (12) from the protection position to the connection position during relative axial movement between the socket-outlet (10) and the plug (90) while the plug (90) is engaging in the socket-outlet (10).