H - Electricity – 01 – H
Patent
H - Electricity
01
H
H01H 17/24 (2006.01)
Patent
CA 2579485
The invention relates to switching equipment (1) comprising a housing (2), at least one contact point (4) that has at least one fixed and one mobile contact part (8, 6) and an electromagnetic trip device (20, 20a, 20b), comprising a trip coil (22, 22a, 22b) and a hammer armature (26, 26a, 26b). Said equipment is characterised in that the electromagnetic trip device (20, 20a, 20b) comprises a snap body (24, 24a, 24b) consisting of a material with magnetic shape memory properties, which interacts with the hammer armature (26, 26a, 26b). According to the invention, when a short-circuit occurs, the snap body (24, 24a, 24b) is switched between two bi-stable positions by the influence of the magnetic field of the trip coil (22, 22a, 22b).
La présente invention concerne un appareil de commutation (1) comprenant un boîtier (2) et au moins un point de contact (4) qui présente un plot de contact fixe (8) et un plot de contact mobile (6), ainsi qu'un déclencheur électromagnétique (20, 20a, 20b) qui présente une bobine d'excitation (22, 22a, 22b) et un induit à impact (26, 26a, 26b). Cette invention est caractérisée en ce que le déclencheur électromagnétique (20, 20a, 20b) comprend un corps à déclic (24, 24a, 24b) qui est en liaison active avec l'induit à impact (26, 26a, 26b) et qui est constitué d'un matériau magnétique à mémoire de forme. Ce corps à déclic (24, 24a, 24b) est réversible dans deux positions bistables sous l'influence du champ magnétique de la bobine d'excitation (22, 22a, 22b) en cas de chute de courant de court-circuit.
Claeys Patrick
Vogel Albrecht
Abb Patent Gmbh
Marks & Clerk
LandOfFree
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