GB582281A - Improvements in art of dielectrics - Google Patents

Improvements in art of dielectrics

Info

Publication number
GB582281A
GB582281A GB3625/43A GB362543A GB582281A GB 582281 A GB582281 A GB 582281A GB 3625/43 A GB3625/43 A GB 3625/43A GB 362543 A GB362543 A GB 362543A GB 582281 A GB582281 A GB 582281A
Authority
GB
United Kingdom
Prior art keywords
castor oil
vacuum
fatty acid
oil
free
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3625/43A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aerovox Corp
Original Assignee
Aerovox Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aerovox Corp filed Critical Aerovox Corp
Publication of GB582281A publication Critical patent/GB582281A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances

Abstract

582,281. Electric insulating compositions. AEROVOX CORPORATION. March 5, 1943, No. 3625. Convention date, July 7, 1942. Drawings to Specification. [Class 140] A dielectric composition for impregnating cellulosic elements of electric condensers comprises castor oil or glycerol triricinoleate which is liquid at room temperature and has been purified by treatment with a bleaching clay (e.g., fuller's earth) or an activated clay or activated carbon and is substantially devoid of free fatty acid. The castor oil may contain less than 0.4 per cent. and as little as 0.01 per cent. free acid calculated as oleic acid. Adsorbents specified are fuller's earth, bentonite, activated clays, and activated carbons. Adsorbent treatment may be performed either on commercial castor oil containing free fatty acid or on castor oil from which free acid has been either completely or partially removed. The purified castor oil has much bigger resistivity and an improved power factor. Wound condenser sectors may be dried at 250‹F under a vacuum of aproximately 200 microns mercury, and the impregnating oil run in through clean conduits while maintaining a vacuum of 400 microns or better. The sections are allowed to remain in oil for several hours at 180‹F. under a vacuum of approximately 100 microns, and after breaking the vacuum the sections are sealed in metal containers filled with fresh oil. Specification 581,483, [Group III], is referred to. The Specification as open to inspection under Sect. 91 refers also to the use of a member of the class including fatty acid esters and mixtures thereof such as vegetable oils and waxes and derivatives of each of the alternatives, the material being largely or substantially wholly free of some or all of those electrically deleterious constituents normally present in commercial chemically pure products, the constituents including free fatty acid and impurities removable by adsorption. Vegetable, animal, and synthetic oils, fats, and waxes, and derivatives such as acetylated and hydrogenated fatty esters and also derivatives such as ketones are referred to. This subject-matter does not appear in the Specification as accepted.
GB3625/43A 1942-07-07 1943-03-05 Improvements in art of dielectrics Expired GB582281A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US582281XA 1942-07-07 1942-07-07

Publications (1)

Publication Number Publication Date
GB582281A true GB582281A (en) 1946-11-12

Family

ID=22015480

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3625/43A Expired GB582281A (en) 1942-07-07 1943-03-05 Improvements in art of dielectrics

Country Status (1)

Country Link
GB (1) GB582281A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1275202B (en) * 1958-01-14 1968-08-14 British Insulated Callenders Impulse current system for generating short-term high-voltage power surges
US7048875B2 (en) 1996-06-18 2006-05-23 Abb Technology Ag High oleic acid oil compositions and methods of making and electrical insulation fluids and devices comprising the same
US8741186B2 (en) 2008-10-16 2014-06-03 Ragasa Industrias, S.A. De C.V. Vegetable oil of high dielectric purity, method for obtaining same and use in an electrical device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1275202B (en) * 1958-01-14 1968-08-14 British Insulated Callenders Impulse current system for generating short-term high-voltage power surges
US7048875B2 (en) 1996-06-18 2006-05-23 Abb Technology Ag High oleic acid oil compositions and methods of making and electrical insulation fluids and devices comprising the same
US8741186B2 (en) 2008-10-16 2014-06-03 Ragasa Industrias, S.A. De C.V. Vegetable oil of high dielectric purity, method for obtaining same and use in an electrical device
US8741187B2 (en) 2008-10-16 2014-06-03 Ragasa Industrias, S.A. De C.V. Vegetable oil of high dielectric purity, method for obtaining same and use in an electrical device
US8808585B2 (en) 2008-10-16 2014-08-19 Ragasa Industrias, S.A. De C.V. Vegetable oil of high dielectric purity, method for obtaining same and use in an electrical device
US9039945B2 (en) 2008-10-16 2015-05-26 Ragasa Industrias, S.A. De C.V. Vegetable oil having high dielectric purity
US9048008B2 (en) 2008-10-16 2015-06-02 Ragasa Industrias, S.A. De C.V. Method for forming a vegetable oil having high dielectric purity

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