Axial magnetic field interrupter
AssigneeCooper Industries, Inc.
InventorErnest F. Bestel
Life of this patent
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Abstract
A cylindrical coil conductor incorporated in a vacuum interrupter comprises a cylindrical body with a plurality of inclined slits therein defining a plurality of current paths. The coil conductor is uniformly cylindrical to reduce radial magnetic fields, which tend to cancel the axial magnetic field generated by the coil conductor. The cylindrical coil conductor electrically connects to the rear surface of a main electrode through a copper ring to maintain current on the periphery of the main electrode. The front surface of the main electrode includes a ring-shaped protrusion to define a point of contact with an opposite main electrode. Current flows into the protrusion, through the main electrode to the copper ring, thereby defining a short current path with a minimal resistance.
Claims13
A vacuum interrupter, comprising:
- a first electrode structure disposed in a vacuum vessel, said first electrode structure having a main electrode;
- a second electrode structure disposed within the vacuum vessel, said second electrode structure having a main electrode;
- means for moving at least one of said first and second electrode structures axially of the other;
- means for maintaining a low resistance path for current flowing through the main electrodes of said first and second electrode structures when the main electrodes are in contact, wherein said maintaining means includes a protrusion extending from the main electrodes for a contact point between the main electrodes.
A vacuum interrupter, comprising:
- a first electrode structure disposed in a vacuum vessel;
- and
- a second opposed electrode structure disposed within the vacuum vessel, said second electrode structure being axially movable toward and away from said first electrode structure;
- said first electrode structure and said second electrode structure each including a uniformly cylindrical coil conductor, a main electrode, and a copper ring interposed between said coil conductor and said main electrode for maintaining a low resistance current path through said main electrode.
A vacuum interrupter, comprising:
- a vacuum vessel with a first end plate and a second end plate;
- a first coil conductor electrically connected to said first conductor disk, said first tubular coil conductor including a plurality of inclined slits on a portion of said first tubular coil conductor, defining a plurality of current paths through said first tubular coil conductor, with an electrical connector positioned at the end of each current path;
- a first conductive ring electrically connected to said electrical connector;
- a first main electrode electrically connected to the conductive ring;
- a second main electrode positioned adjacent said first main electrode;
- a second conductive ring electrically connected to said second main electrode;
- a second coil conductor electrically connected to said second conductive ring, said second coil conductor including a plurality of inclined slits on a portion of said second tubular coil conductor, defining a plurality of current paths through said second tubular coil conductor.
Dependencies are inferred from the claim text.