Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1975-01-08
1977-09-13
Macon, Robert S.
Electricity: circuit makers and breakers
Liquid contact
Time delay
H01H 3368
Patent
active
040484572
ABSTRACT:
An oil-type circuit-breaker has an improved grid structure for effecting quick extinction of the arc, which is established and lengthened within the grid structure by the separation of the rod-shaped movable contact downwardly away from the stationary-contact structure. The grid structure is constructed by providing a plurality of suitably-configured plate elements, constituting vent passages and oil pockets, within an outer cylindrical shell member. The stationary contact assembly is so arranged as to have a lengthened finger, which serves as an arcing horn, disposed adjacent the side lateral vent openings. The vent openings are formed by passages provided in the individual suitably-configured plate elements; and a splitter plate is interposed between the lateral vent passages and close to the path of movement of the movable contact rod. Additional lower-disposed oil pockets and a lower plug member having an entrance opening, assist in guiding the upward movement of the movable contact rod, and additionally provide considerable turbulence within the oil-grid structure during the opening operation.
REFERENCES:
patent: 3080467 (1963-03-01), Date
patent: 3128360 (1964-04-01), Rietz
patent: 3201552 (1965-08-01), Baldini
patent: 3392248 (1968-07-01), Rietz et al.
patent: 3519774 (1970-07-01), Rietz
Crout W. R.
Macon Robert S.
Westinghouse Electric Corporation
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