Contact part arrangement for vacuum chamber has second contact part permanently connected to first, at distance behind its contact surface, and circular coil behind second contact part

摘要

The contact part arrangement has a first contact part (12), which contacts the first contact part of the counter contact arrangement in the switched-on state and carries the rated current, a second contact part (17) that carries the light arc during the switch-off process and a coil (14) for generating a diffuse light arc. The second contact part is mechanically permanently connected to the first and is arranged at a distance behind its contact surface. A circular coil lies behind the second contact part and is electrically in series between the contact rod (10) and the second contact part, with its annular surface approximately aligned with that of the second contact part.