H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/219
H01H 33/66 (2006.01) H01H 33/664 (2006.01)
Patent
CA 1319731
1 53,464 VACUUM CIRCUIT INTERRUPTER WITH AXIAL MAGNETIC ARC TRANSFER MECHANISM BACKGROUND OF THE INVENTION Technical Field: This invention relates to vacuum circuit inter- rupters and more particularly to vacuum circuit interrupt- ers with axial magnetic arc transfer mechanisms. Description of the Invention: A vacuum circuit interrupter is an evacuated container that encloses electrical contacts for carrying a load current in an electrical distribution system. When the contacts are separated, an arc usually occurs during initial moments of the separation. The arc occurs at high power and must be extinguished without damaging the inter- rupter in order to ensure repetitive operation. Vacuum circuit interrupters of various types have been developed for preventing localized destruction arc burning damage to the surface contacts during interruption. Typical solutions to problems of dissipating an arc and minimizing damage to a vacuum interrupter are shown in prior art U.S. Patent Nos. 3,670,129; 4,020,304; 4,079,217; 4,553,002; and 4,618,705. These patents disclose in a vacuum interrupter a magnetic field applied to disburse an arc from the contacts during interruption of a current. As a result of an ongoing effort to further minimize damage incurred during arcing, an effort has been made to improve the transfer of current to the load termi- nal during arcing. An overall objective has been to reduce
576334
Bamford Allan John
Wayland Paul Orlando
Riches Mckenzie & Herbert Llp
Westinghouse Electric Corporation
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