H - Electricity – 01 – H
Patent
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306/230
H01H 33/91 (2006.01)
Patent
CA 1156297
GAS BLAST CIRCUIT BREAKER COMBINING A MAGNETICALLY DRIVEN ROTATING ARC AND A PUFFER INDUCED GAS BLAST ABSTRACT OF THE DISCLOSURE A circuit breaker having a pair of main contacts for carrying electrical current flow during closed contact operation is provided with a pair of concentric auxiliary electrodes and magnetic means for rotating an arc produced by the arc current at the opening of the electrodes and puffer means for supplying a compressed flow of arc extinguishing gas between the auxiliary electrodes when the circuit breaker is opened. In one example, each auxiliary electrode has a magnetic means located therewithin to produce a self-induced magnetic field which drives the arc around the circumference of the auxiliary electrode. In an alternative embodiment, one auxiliary elec- trode included a rapidly expanding nozzle, and the other auxiliary electrode is shaped as a solid cylindrical pin located concentric with said nozzle. In the preferred embodi- ment, the insulating gas comprises sulfur hexafluoride.
364183
Company General Electric
Eckersley Raymond A.
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