| 摘要 |
The invention relates to an electric contact device that is part of an electric switching device able to allow or interrupt the passage of the electric current, comprising at least one moving support (33, 35) and a contact pad (60, 62) mounted on the moving support (33, 35), the moving support (33, 35) being able to move to position the contact pad (60, 62) in contact with a fixed contact surface (38, 40) connected to an electrical conductor, the contact pad (60, 62) comprising a contact surface (34, 36) designed to cooperate with said fixed contact surface (38, 40). The contact surface (34, 36) of the contact pad (60, 62) comprises a first spherical portion, comprising an actual zone of contact with said fixed contact surface (38, 40) in the position allowing the passage of current, and, in the continuation of the first spherical portion, a second convex portion with a variable shape going from spherical to cylindrical. The invention also relates to a low-voltage single-pole phase unit comprising such an electrical contact device. |
