Fixed contact tap switch with rotating bearing structure

The invention relates to a tapping switch which is used for a power transformer and is provided with a rotating bearing structure fix contact, comprising an insulator, a transmission shaft, a bearing frame, a dynamic contact component which is arranged on the transmission shaft and operates in fix direction and fix contact components which are respectively tapped with taps of a transformer coil. The tapping switch is characterized in that relative switching parts of each tapping fix contact components and passive contact components are provided with the rotating bearing structure. The tappingswitch has the advantages that: first, the tapping switch which is provided with the rotating bearing structure fix contact is especially applied to high voltage transformers; second, the switch is also applied to transformers with high currents; third, the operation torque of the switch is very light; forth, the shift handle feeling of the switch during the operation is definite.