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

1976-04-19

1978-03-28

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200147R, H01H 3366

Patent

active

040816400

ABSTRACT:
High interruption voltage capability within a vacuum switch of limited physical size is achieved by combining 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 magnetic field external to the outer cylindrical surface, causing the arc to burn in a diffuse mode over a greatly enlarged electrode surface area.

REFERENCES:
patent: 3008022 (1961-11-01), Lee
patent: 3082307 (1963-03-01), Greenwood et al.
patent: 3131276 (1964-04-01), Watson
patent: 3210505 (1965-10-01), Porter
patent: 3261954 (1966-07-01), Yonkers
patent: 3555223 (1971-01-01), Robinson et al.
patent: 3740507 (1973-06-01), Kuhl et al.
patent: 3914568 (1975-10-01), Crouch et al.

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