VAKUUMSCHALTER

摘要

The arc can be moved between the open contacts by the magnetic forces of a magnetic system (20) which is arranged outside the casing (10) at the end of the current supply (14) to the fixed contact (2). According to the invention, a substantially disc-shaped fixed contact (2) forms the base or cover of the hollow cylindrical casing (10). The magnetic system (20) generates a magnetic field (6) which passes through the fixed contact (2) and the field lines of which form a toroidal arch, the circular apex line of which has a radius rs which is, at the most, as great as the radius r1 of the smaller of the two contacts (2, 4). Contact burning is correspondingly reduced by the movement of the cathode spot in the magnetic field (6).