Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1986-08-13
1987-05-05
Macon, Robert S.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200148B, 2003023, H01H 3388, H01H 3354
Patent
active
046635041
ABSTRACT:
A single-phase ground enclosed load break switch for distribution voltages has a hermetically sealed cylindrical metal housing of from 2 to 6 inches diameter which contains an insulating gas under pressure. The switch has a movable contact assembly to contact a pair of opposed stationary coaxial conductors within the housing. Movement of the contact assembly along one conductor breaks the connection with the other conductor and simultaneously reduces the sliding contact force on the first conductor. The switch has conductive bands coaxially positioned near the housing around the conductors for low voltage measurements monitoring conductor energization and contact position. A rocking bellows at the fulcrum of a crank actuator provides a compact hermetic seal for the actuator without excessive strain of the bellows. A safety interlock with a visual indicator locks the contact assembly in case of a loss of pressure. Excessive pressure in the switch causes the bellows to be punctured with consequent locking of the contact assembly. The switch is small enough to be mounted directly on a transformer or placed into a cable, without the need for a separate enclosure.
REFERENCES:
patent: 1706746 (1929-03-01), Rice
patent: 2137880 (1938-11-01), Loesser
patent: 2419074 (1947-04-01), Herbert
patent: 2454340 (1948-11-01), Reichel
patent: 2742548 (1956-04-01), Cole
patent: 2794931 (1957-06-01), Gardner
patent: 2860933 (1958-11-01), Wolff
patent: 2941407 (1960-06-01), Huber et al.
patent: 3030481 (1962-04-01), Gussow et al.
patent: 3114815 (1963-12-01), Easley et al.
patent: 3248511 (1966-04-01), Heilman
patent: 3424884 (1969-01-01), Floessel et al.
patent: 3542986 (1970-11-01), Kotski
patent: 3641295 (1972-02-01), Ferton et al.
patent: 3755637 (1973-08-01), Gloviak et al.
patent: 3947650 (1976-03-01), Strain et al.
patent: 3970811 (1976-07-01), Krebs
patent: 4020307 (1977-04-01), Strubin
patent: 4105880 (1978-08-01), Rapp et al.
patent: 4107498 (1978-08-01), Golota
patent: 4153827 (1979-05-01), Mircovich et al.
patent: 4187437 (1980-02-01), Muller et al.
patent: 4236054 (1980-11-01), Karrenbauer et al.
patent: 4412115 (1983-10-01), Okuno
patent: 4427862 (1984-01-01), Lin
"Operating Principles of Medium-High-Voltage Circuit-Breakets of Small-Oil Volume -Vacuum-SF.sub.6 ", by Karl Stegmuller-Elektrizitatswirtschaft, vol. 81, (1982) Booklet 22.
Burkard Herbert G.
Macon Robert S.
Raychem Corporation
Rice Edith A.
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