Patent ID: 6541726
Filing Date: 2003-04-01
Classification: H01H

Abstract:
A vacuum cartridge for an electrical protection apparatus, said cartridge comprising:a substantially cylindrical enclosure having a longitudinal axis and closed by two end-plates, two contacts for location in an electrical circuit, the centers of said contacts located along the longitudinal axis inside the enclosure, at least one of said contacts being a movable contact connected to an operating mechanism and slidingly mounted between a closed position of the contacts and a separated position for forming an electric arc between them, wherein separation of the contacts results in breaking of the electrical circuit, and a means for producing an axial magnetic field for diffusion of an arc located in at least one arc formation area, comprising means for increasing a rate of cooling of contact material in liquid form flowing on a contact surface of at least one of said contacts during movement from said closed position to said separated position, such liquid being contact material melted by an electric arc located in at least one arc formation area during said movement.