Patent ID: 6072141
Filing Date: 2000-06-06
Classification: H01H

Abstract:
A vacuum circuit-breaker contact arrangement comprising a pair of contacts with a contact pin being relatively axially moveable to one another from a position of engagement to a position of disengagement to establish a circuit interrupting arc therebetween, at least one of said contacts being provided with a generally cup shaped member having a bottom plate connected with said contact pin and a wall portion, a plurality of slots which produce winding sections being arranged in said cup shaped member, the inside of said cup shaped member being at least partly covered by a contact- and electrode-member at a front side of said cup shaped member and facing said other contact, said other contact having a contact- and electrode-member generally aligned with the contact- and electrode-member of said at least one contact, wherein said plurality of slots includes at least one first slot and a second slot, the bottom plate of at least one contact being provided with said at least one first slot which essentially extends inside said wall portion along an arc of a circle and penetrates at least partly the bottom plate away from said contact- and electrode-member, said second slot being joined to an end of said first slot and extending at least into the wall portion of said cup shaped member toward said contact- and electrode-member, so that radially outside of said first slot is produced at least one winding section, said at least one winding section generating essentially axial magnetic field in a current conducting state.