Compact vacuum switch for high voltage circuit interruption

Details Compact vacuum switch for high voltage circuit interruption Compact vacuum switch for high voltage circuit interruption

H - Electricity

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H01H 33/66 (2006.01) H01H 33/664 (2006.01)

Patent

CA 1073017

RD-7952 COMPACT VACUUM SWITCH FOR HIGH VOLTAGE CIRCUIT INTERRUPTION Abstract of the Disclosure High interruption voltage capability within a vacuum switch of limited physical size is achieved by combin- ing a diffuse arc electrode structure with provision for retracting one or both of a pair of movable butt contacts into an approximately field-free region. On separation of the contacts, an arc is initiated on the contacts and then transferred to a fixed gap electrode structure comprising a coaxial cylindrical electrode assembly in which the current path is folded back on itself to reduce the azimuthal mag- netic field external to the outer cylindrical surface, caus- ing the arc to burn in a diffuse mode over a greatly enlarged electrode surface area.

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