Spring loaded auxiliary contact system for bus transfer switching in a center break switch

The invention relates to a center break switch having a contact system for electrical current conduction and bus transfer switching. The contact system includes two moving contacts. One of the two moving contacts includes a finger contact and the other moving contact includes a first contact. Each moving contact includes a contact for bus transfer switching, wherein one of the two contacts includes a spherical contacting element, and the other contact includes a rectangular contacting element. The spherical contacting element and the rectangular contacting element engage during switching for the bus transfer, and stay in contact when the finger contact is engaged with the first contact for electrical current conduction.