Patent ID: 7906742

Claim:
A contact arrangement for a vacuum interrupter chamber ( 1 ), the contact arrangement comprising: a pair of inner contact pieces ( 11 , 12 ) which are configured as radial magnetic field contact pieces, and a pair of outer contact pieces ( 21 , 22 ) which are arranged adjacent to the inner contact pieces ( 11 , 12 ), respectively, and are connected electrically in parallel with them, the outer contact pieces being disposed radially outward from the inner contact pieces, wherein at least one of the inner contact pieces ( 11 ) is mounted such that it can move, wherein the inner contact pieces ( 11 , 12 ) are substantially disc-shaped, wherein the outer contact pieces ( 21 , 22 ) are-configured as radial magnetic field contact pieces, wherein the inner contact pieces ( 11 , 12 ) and the outer contact pieces ( 21 , 22 ) are arranged and designed in such a manner that an arc which is struck during a disconnection process between the inner contact pieces ( 11 , 12 ) can be commutated entirely or partially between the outer contact pieces ( 21 , 22 ), and wherein one of the inner contact pieces has a coating thereon and is configured so as to extend beyond its associated outer contact piece in an axial direction by a thickness of the coating; and wherein the other one of the inner contact pieces is configured so as to be disposed flush with its associated outer contact piece in an axial direction.