Contact mechanism of an electric switching device

摘要

A contact mechanism includes a current path having a 360° winding formed by a plurality of conductor sections and having an axis that is perpendicular to a plane in which a rotary contact body is movable. The conductor sections include a first section with a first current conductor that extends to a fixed contact. A second conductor section extends through the fixed and rotary contacts. A third conductor section extends through the rotary contact. A final, conductor section, including a second current conductor, extends to the rotary contact body and runs parallel and in close proximity to the first current conductor. Each of the first and second current conductors are substantially parallel to the rotary contact body in the closed position and are formed as straight and rigid busbars having a length corresponding at least to a length of a contact arm of the rotary contact body.

主权项

1. A contact mechanism of an electric switching device comprising a fixed contact, a rotary contact body including a contact arm having a length, a moving rotary contact part disposed on at least one end of the contact arm, and supply and discharge busbars, the contact mechanism including a current path having a 360° winding formed by a plurality of conductor sections and having an axis that is perpendicular to a plane in which the rotary contact body is movable, the plurality of conductor sections comprising:
a first conductor section including a first current conductor formed as a first straight and rigid busbar that provides a first busbar current path that extends to the fixed contact; a second conductor section that extends through the fixed and rotary contacts; a third conductor section that extends through the rotary contact body; and a final conductor section including a second current conductor formed as a second straight and rigid busbar that provides a second busbar current path and that extends to the rotary contact body, the second busbar current path running parallel and in close proximity to the first busbar current path and each of the first busbar current path and the second busbar current path being substantially parallel to a current path provided by the rotary contact body in the closed position, wherein each of the first and second busbar current paths have a length at least as long as the length of the contact arm of the rotary contact body.