Contact structure for vacuum switching chamber

摘要

The structure comprises a contact support in the form of a contact stalk (10) with a secured contact (22) and associated coil (18), generating an axial magnetic field. The contact stalk locates a cylindrical holder (14) with an annular recess (15) open at least at one side, for the coil. The coil is conductively coupled both to the contact support and to the contact such that the current flow between the two components covers a spiral path. Preferably the coil forms a ring with a peripheral slit (2) worked into it, with the contact secured at the free front side of the ring, with the other ring front side conductively coupled to the contact stalk.