Electrical switching device, notably for direct current, equipped with a magnetic module for blowing the electric arc

摘要

An electrical switching device (1) which comprises at least one double breaking pole provided with two fixed contacts (3, 4) that cooperate with two moving contacts (5, 6) arranged so as to move in a breaking plane (P) and define, with every fixed contact, a breaking zone. The device comprises a permanent magnet (11, 12) housed in an insulating holder arranged in the immediate environment, next to each breaking zone, symmetrically with respect to the breaking plane and oriented so as to generate a magnetic excitation vector parallel to the breaking plane (P) so that the induced electromagnetic force (FE) moves and stretches every electric arc (E1, E2), generated when opening the electrical circuit, in a direction perpendicular to the breaking plane (P), leading to the extinction of the electric arc regardless of the polarity of the magnet and/or of the current.

主权项

1. An electrical switching device (1, 100, 110), for direct current, equipped with a magnetic module for blowing an electric arc, the switching device comprising:
at least a housing (2, 200, 210) that delimits at least one breaking pole comprising at least one first fixed contact (3, 300, 310) that cooperates with at least one first moving contact (5, 500, 510), and the first moving contact being arranged so as to move between open and closed positions within a breaking plane (P) and to define, with the first fixed contact, a first breaking zone (Z1) in which a first electric arc (E1) extends upon opening the electrical circuit, wherein the magnetic module comprises at least a first permanent magnet (11) housed in at least a first insulating holder (20), the first permanent magnet is an independent permanent north-south magnet whose magnetic field loops on itself, with north-south sides perpendicular to the breaking plane (P), and arranged immediately adjacent to the first breaking zone (Z1), symmetrically with respect to the breaking plane (P) and oriented so as to generate a magnetic excitation vector which extends parallel to the breaking plane (P) so that an induced electromagnetic force (FE) moves and stretches the first electric arc (E1) perpendicularly to the breaking plane (P), independently of a direction of a polarity of the at least one of the first permanent magnet and of the current.