Abstract: A motor operator for switchgear for mains power distribution systems, where the switchgear comprises a closed cabinet 1 with an operating shaft 2 protruding there from. The operating shaft is rotatable at least between two positions and has a coupling part. The motor operator 6 comprises a housing 10, which is mountable on the external surface of the switchgear housing, and a rotatable connection shaft connected to an electric motor drive mechanism. It has a first coupling part to fit with the coupling part of the switchgear in a longitudinal axial sliding and non-rotational interlocking manner. Further, it has a second coupling part extending from the housing to operate the switch manually. The operator further comprises a control unit 8 with a connection rack, one or more power supplies, besides from a battery 9, and one or more communication facilities 9, such that the motor operator appears self-contained with all necessary facilities ready to operate when installed.