Electrical operating mechanism for switchgear

Abstract

The invention discloses an electrical operating mechanism used in a gas insulated metal-enclosed switchgear (GIS). A special gear/cam combination drive and conversion mode is utilized to ensure that the output rotator angle of an original gear/cam combination driving device which can reach about 3/4 turns to the maximum is converted into an output rotator angle near three-turn, and the needs of multi-turn input required by an isolating switch and a grounding switch in the high-voltage (252-1100kV) GIS whole-set switchgear are satisfied. In the invention, a pair of auxiliary switches driven by the cam is adopted, the number of the transmission parts is reduced to the minimum limit, the auxiliary switch and a driving shaft of the auxiliary switch are enabled to approach very close, the size of the mechanism is decreased, the transmission and positioning are precise, the performance is reliable and the auxiliary switches can be very conveniently switched at any needed position through changing the positions of two teeth of the cam. The invention has the advantages of excellent transmission characteristics, little impact force of switching-in and switching-off startup and placing, high precision of the output rotator angle of the mechanism as well as exact and reliable positioning and maintenance of the switching-in and switching-off placing.

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