Patent ID: 8129644
Filing Date: 2012-03-06
Classification: H01H

Abstract:
1. A motor operator for switchgear mains power distribution systems, said switchgear comprising a closed cabinet with an operating shaft protruding there from, said operating shaft being rotatable at least between two positions and has a coupling part, said motor operator comprising a housing mountable in front of the switchgear cabinet, a rotatable connection shaft connected to an electric motor via a drive mechanism, and has a first coupling part to fit with the coupling part of the switchgear in a non-rotational interlocking manner, and further has a second coupling part accessible from outside of the housing to operate the switchgear manually and for which purpose the motor operator has a release mechanism releasing the connection shaft from the electric motor for manually operations, wherein the motor and the drive mechanism comprise: a linear actuator with a rear mounting for mounting in the housing of the motor operator, a front mounting on a tube-shaped activation element for connection to the rotatable connection shaft, a spindle with external threads, and a spindle nut arranged on the spindle in a non-rotational manner, the activation element being attached to the spindle nut.