Vacuum electrical switch
AssigneeSchneider Electric SA
InventorsRoger Bolongeat-Mobleu, Frederic Burnaz, Hans Schellekens
Life of this patent
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Abstract
A vacuum switch has an elongated vacuum cartridge with a cylindrical enclosure blanked off by two end-plates, in which there are housed two arcing contacts respectively stationary and movable, and a coil designed to produce an axial magnetic field in the arc formation zone. The coil has one end arranged as a current conducting strip and an end electrically connected to one of the above-mentioned arcing contacts. The two ends of the coil are superposed and electrically connected, and a branch-off means, such as for example a magnetic circuit, is fitted between these two ends to branch off a part of the main current through the coil during breaking in order to create the axial magnetic field.
Claims15
An electrical switch designed to break an electrical circuit, comprising:
- an elongated vacuum cartridge with a cylindrical enclosure blanked off by two end-plates, the cartridge housing a stationary arcing contact fixedly secured to one of the end-plates and a movable arcing contact, mounted axially and slidingly inside the cartridge, and at least one coil for producing an axial magnetic field in an arc formation zone, the coil comprising a first end electrically connected to one of the arcing contacts and a second end arranged as a current conducting strip, the first and second ends of the coil being electrically connected, and branch-off means disposed between the first and second ends to branch a part of a main current off through the coil during circuit breaking, thereby producing the axial magnetic field.
Dependencies are inferred from the claim text.