Middle-voltage gas insulation metal enclosed switchgear

The present invention provides a middle-voltage gas insulation metal enclosed switchgear, and relates to the field of middle-voltage electric transformer and distribution systems. The middle-voltage gas insulation metal enclosed switchgear comprises a cabinet body with an operation panel and a bus three-position isolation switch cabinet, a breaker chamber, a secondary control chamber, a mechanismoperation chamber, a cable chamber and a voltage relieving channel chamber which are arranged in the cabinet body, the bus three-position isolation switch cabinet is internally provided with a three-position isolation switch, an isolation movable contact module of the three-position isolation switch can be selectively in contact with a ground contact and an isolation static contact under the driveof a transmission shaft so as to allow the three-position isolation switch to switch among a closing position, an isolation position and a grounding position, optimize a C-GIS product main loop arrangement structure and effec