Electrical breaking module equipped with a magnetic blow-out device and electrical breaking apparatus comprising such a module

An electrical breaking module equipped with a magnetic blow-out device, said breaking module comprising a non-magnetic, electrically insulating housing, in which at least one fixed contact and one moving contact are housed, said moving contact being arranged to move relative to said fixed contact between a closed position and an open position and vice versa on a trajectory defining a breaking plane, said fixed contact and said movable contact defining between them a breaking zone extending into said breaking plane, into which an electric arc extends at an origin thereof, when an electrical circuit is opened, said breaking module comprising at least one breaking chamber delimited by inner walls of said housing and comprising said breaking zone for managing said electric arc in order to break a current, said magnetic blow-out device comprising at least one magnetic source field arranged in said breaking chamber opposite said breaking zone, characterized in that said at least one magnetic source field is oriented to generate at least one magnetic excitation vector substantially parallel to said breaking plane so that induced electromagnetic force displaces and stretches said electric arc in a direction substantially perpendicular to said breaking plane towards the housing, and in that said magnetic blow-out device further comprises at least one non-magnetic and electrically insulating deflector arranged in said breaking chamber to form a physical obstacle in a path of the electric arc when the electric arc is magnetically blown-out,

• said deflector consisting of a solid one-piece part or of an openwork one-piece part, the deflector occupying most of a space existing between said breaking zone and said housing in a direction of said electromagnetic force, or
• said deflector consisting of a plurality of fins or plates spaced apart and oriented substantially perpendicular to said breaking plane in a direction of said electromagnetic force, each fin or plate occupying most of a space corresponding to a thickness of the fin or plate and existing between said breaking zone and said housing in the direction of said electromagnetic force,
• so as to create at least one arc confinement zone in a narrow gap remaining between insulating walls of said deflector and those of said housing, into which said electric arc is deflected and constrained when magnetically blown out, to promote cooling and extinction of said electric arc.