Electricity: conductors and insulators – With fluids or vacuum – With fluid-condition responsive and/or indicating means
Patent
1976-06-09
1978-10-31
Askin, Laramie E.
Electricity: conductors and insulators
With fluids or vacuum
With fluid-condition responsive and/or indicating means
165 11, 165105, 174 15BH, 174 15HP, 174143, 174209, 200150R, 200289, H01B 1726, H01B 1754, H01H 3368, F28D 500
Patent
active
041236181
ABSTRACT:
An improved vapor-cooled terminal-bushing is provided for increased current-carrying capacity, such as 6,000 amperes, for example, in an oil-type circuit-breaker, being provided with a "dry" body portion, utilizing resinous materials, such as epoxy-resin formulations, for example.
Preferably, the body portion of resinous materials, such as epoxy resin, for example, is composite, or of a two-piece construction, having an inner first epoxy-resin formulation having improved dielectric strength, and an outer-disposed externally-located "petticoat"-type insulating second body portion, having weather-sheds, the second weather-shed annular body portion being preferably cast directly onto the inner high-dielectric-strength first epoxy-body portion, and having some flexibility for adherence purposes.
An externally-located tubular metallic preferably finned heat-exchanger or cooling condenser, having a tubular central hub portion, constitutes an extension of the inner, elongated, tubular, high-voltage terminal-lead, which is partially filled with a low-boiling-point cooling liquid or refrigerant, such as "Freon-11", for example. A massive metallic line-terminal connector is affixed to the terminal-lead intermediate the location of the heat-exchanger and the adjacent end of the body portion for additional heat-dissipation purposes. A pressure gauge is attached at the upper end of the heat-exchanger in vapor communication with the cooling liquid within the terminal-lead.
REFERENCES:
patent: 3067279 (1962-12-01), Baker
patent: 3394455 (1968-07-01), Grimmer
patent: 3434087 (1969-03-01), Hofmann
patent: 3531580 (1970-09-01), Foster
patent: 3547871 (1970-12-01), Hofm ann
patent: 3627899 (1971-12-01), Moore
patent: 3767835 (1973-10-01), Engelhardt
patent: 3828000 (1974-08-01), Luck et al.
patent: 4005297 (1977-01-01), Cleaveland
Anderson Electric Corporation Manufacturers' Catalog No. 57, Oct. 1, 1958, p. IV of Second Section (Section B).
Cushing George B.
Kothmann Richard E.
Askin Laramie E.
Elchik W. A.
Westinghouse Electric Corp.
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