A support for a high-voltage electric switch includes a housing, a shaft, and an intermediate member positioned between the housing and the shaft. The shaft extends at least partially through the housing, and the shaft is supported for rotation about an axis. The intermediate member is supported for rotation relative to the shaft and supported for rotation relative to the housing.

A switchgear having bus transfer current switching capability by turn and twist mechanism includes a contact system for electrical current conduction and bus transfer switching. The contact system has fixed and movable contact assemblies. Each contact assembly comprises includes main and arcing contacts. The arcing contacts are for bus transfer switching. The movable contact assembly comprises includes a current path pipe and an end piece. The current path pipe is a cylindrical pipe, and the end piece is a rectangular block. The movable contact assembly includes a movable main contact provided on the rectangular block, and a movable arcing contact provided at the end of the cylindrical pipe on a portion about the periphery. During engagement, the cylindrical pipe turns about a first axis to bring the contact assemblies proximal to each other, and twists about a second axis for engagement of the main contacts.

A switchgear having bus transfer current switching capability by turn and twist mechanism includes a contact system for electrical current conduction and bus transfer switching. The contact system has fixed and movable contact assemblies. Each contact assembly comprises includes main and arcing contacts. The arcing contacts are for bus transfer switching. The movable contact assembly comprises includes a current path pipe and an end piece. The current path pipe is a cylindrical pipe, and the end piece is a rectangular block. The movable contact assembly includes a movable main contact provided on the rectangular block, and a movable arcing contact provided at the end of the cylindrical pipe on a portion about the periphery. During engagement, the cylindrical pipe turns about a first axis to bring the contact assemblies proximal to each other, and twists about a second axis for engagement of the main contacts.