EP0499359A1 - Fluide diélectrique résistant au feu - Google Patents

Fluide diélectrique résistant au feu Download PDF

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Publication number
EP0499359A1
EP0499359A1 EP92300365A EP92300365A EP0499359A1 EP 0499359 A1 EP0499359 A1 EP 0499359A1 EP 92300365 A EP92300365 A EP 92300365A EP 92300365 A EP92300365 A EP 92300365A EP 0499359 A1 EP0499359 A1 EP 0499359A1
Authority
EP
European Patent Office
Prior art keywords
process according
composition
hydrocarbon
molecular weight
antioxidant
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.)
Withdrawn
Application number
EP92300365A
Other languages
German (de)
English (en)
Inventor
David William Sundin
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.)
Cooper Power Systems LLC
Original Assignee
Cooper Power Systems LLC
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 Cooper Power Systems LLC filed Critical Cooper Power Systems LLC
Publication of EP0499359A1 publication Critical patent/EP0499359A1/fr
Withdrawn legal-status Critical Current

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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
    • H01B3/20—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances liquids, e.g. oils
    • H01B3/22—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances liquids, e.g. oils hydrocarbons
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M101/00—Lubricating compositions characterised by the base-material being a mineral or fatty oil
    • C10M101/02—Petroleum fractions
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/04—Hydroxy compounds
    • C10M129/10—Hydroxy compounds having hydroxy groups bound to a carbon atom of a six-membered aromatic ring
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M143/00—Lubricating compositions characterised by the additive being a macromolecular hydrocarbon or such hydrocarbon modified by oxidation
    • C10M143/10—Lubricating compositions characterised by the additive being a macromolecular hydrocarbon or such hydrocarbon modified by oxidation containing aromatic monomer, e.g. styrene
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • C10M145/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M145/10—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate
    • C10M145/16—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate polycarboxylic
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
    • C10M169/044—Mixtures of base-materials and additives the additives being a mixture of non-macromolecular and macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/102—Aliphatic fractions
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/102—Aliphatic fractions
    • C10M2203/1025—Aliphatic fractions used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/104—Aromatic fractions
    • C10M2203/1045—Aromatic fractions used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/106—Naphthenic fractions
    • C10M2203/1065—Naphthenic fractions used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/108—Residual fractions, e.g. bright stocks
    • C10M2203/1085—Residual fractions, e.g. bright stocks used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/04—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing aromatic monomers, e.g. styrene
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/02—Hydroxy compounds
    • C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/02—Hydroxy compounds
    • C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
    • C10M2207/026—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with tertiary alkyl groups
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/02—Hydroxy compounds
    • C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
    • C10M2207/027—Neutral salts thereof
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
    • C10M2209/086—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type polycarboxylic, e.g. maleic acid
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/14—Electric or magnetic purposes
    • C10N2040/16—Dielectric; Insulating oil or insulators
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/14—Electric or magnetic purposes
    • C10N2040/17—Electric or magnetic purposes for electric contacts

Definitions

  • This invention relates to a novel composition for a biodegradable dielectric fluid and to a process for the manufacture of the fluid. More particularly, this invention relates to a composition and method that decreases the range of molecular weight species in a biodegradable, fire-resistant dielectric fluid.
  • Dielectric fluids are often used in transformers, electrical switchgears and other pieces of equipment that require fluids that are generally fire and oxidation resistant and which include moderately good heat transfer characteristics and electrical properties. These dielectric fluids, however, are often limited in their use to, for example, equipment that is compatible with a more highly viscous fluid. Furthermore, these known dielectric fluids are typically not compatible with machines that are designed for use with conventional transformer oils. Moreover, these prior art dielectric fluids generally are not eligible for the "less flammable" classification given by the National Electrical Code.
  • compositions and methods that involves decreasing the range of molecular weight species in the dielectric fluid. This is accomplished by exposing a petroleum fluid to a thin-film evaporator which removes the lighter molecular weight materials from the bulk of the oil after it has been completely processed at the refinery. Polar contaminants are removed from the effluent of this wiped-film evaporation process by allowing the effluent to contact an adsorbent medium.
  • the contacting process can be accomplished with either an adsorbent medium in the form of a slurry or by subjecting the effluent to a percolation-type apparatus. Subsequent to the contacting process, the fluid is fortified with antioxidant additives and a flow modifier.
  • the composition and process of manufacturing same has numerous advantages over the prior art dielectric fluids.
  • the composition and process therefor raises the fire point of the resulting fluid and renders it usable as a dielectric fluid classified as "less flammable" by the National Electrical Code.
  • the inventive composition, and process therefor further maintains a lower viscosity of the fluid at use temperatures than is presently available with either petroleum products or dimethyl silicone fluids. This lower viscosity allows the use of the inventive fluid in transformers and other electrical equipment that have been designed for use with conventional transformer oil.
  • the inventive composition, and process therefor results in a dielectric fluid having a high dielectric strength and low dissipation loss.
  • the present invention contemplates preparing a biodegradable dielectric fluid having a reduced range of molecular weight hydrocarbons, a fire point greater than 300°C and a pour point below -15°C.
  • the dielectric fluid will have a high dielectric strength and a low dissipation loss.
  • the dielectric fluid is prepared from a commercial hydrocarbon normally used for dielectric fluids, i.e. a natural petroleum derived saturated paraffin hydrocarbon having a narrow range of molecular weight hydrocarbons.
  • This commercial hydrocarbon is processed to remove at least 5% by weight of the low molecular weight hydrocarbons therefrom to raise the fire point above 300°C, to remove the polar contaminants by contacting the evaporator-processed fluid or an evaporator effluent with an adsorbent medium. Then added to the processed hydrocarbons is an antioxidant and a flow modifier.
  • the dielectric fluid is generally biodegradable and is prepared from commercially available natural petroleum-derived saturated paraffin hydrocarbons.
  • the natural petroleum-derived saturated paraffin hydrocarbon has a maximum viscosity at 40°C of 90 cSt., a minimum fire point of 270°C and a maximum color of 1.0 ASTM.
  • One of the hydrocarbons we use was purchased from Chevron and was identified as natural petroleum-derived saturated paraffin hydrocarbon having a fire point of 270°C.
  • This commercial hydrocarbon is processed to remove sufficient low molecular weight hydrocarbons. This may be done with an evaporator, such as a thin-film evaporator.
  • the paraffinic petroleum fluid that is processed by the above evaporator method should have an initial fire point of at least 270°C, as measured by ASTM standard method D92.
  • ASTM standard method D92 the ASTM method involves filling a test cup to a specified level with a sample of the transformer oil. The temperature of the sample is increased rapidly at first and then at a slow constant rate as the flash point is approached. At specified intervals a small test flame is passed across the cup. The lowest temperature at which application of the test flame causes the vapors above the surface of the liquid to ignite is the fire point.
  • the commercial paraffinic petroleum purchased will normally require removal of approximately ten to fifteen percent of the low molecular weight (lower boiling point) hydrocarbons in order to raise the fire point above the 300°C that is mandated by the National Electrical Code Section 450-23.
  • the effluent from this thin-film evaporation process is then contacted with an appropriate adsorbent medium i.e. Fullers Earth to remove polar contaminants.
  • an appropriate adsorbent medium i.e. Fullers Earth to remove polar contaminants.
  • the contacting process can be accomplished with either an adsorbent medium in the form of a slurry or by subjecting the effluent to a percolation-type apparatus.
  • the antioxidants used in this invention are the known antioxidants for dielectric fluids.
  • the preferred antioxidants are the hindered phenols which are used at concentrations of less than about 2.0% by volume and preferably between about 0.05% and about 0.50% by volume.
  • the hindered phenolic compound may be 2,6 di-tert butyl phenol or 2,6 di-tert butylated paracresol or mixtures thereof.
  • any one of a number of related compounds may be used which have the ability to increase the oxidation stability of petroleum oils. Examples of oxidation inhibitors that may be used herein include Ethyl 701 and Ethyl 702 which are manufactured by the Ethyl Chemical Corporation, Baton Rouge, Louisiana.
  • a flow modifier is added to the treated effluent.
  • the modifier is from the alkylated polystyrene family and is added to the solution at a concentration of less than about 0.10% by weight and preferably between about 0.10% and about 0.70% by weight.
  • the alkylated polystyrene type of flow modifier used is OA-110B, manufactured and sold by Argus Chemical Corporation. Argus also makes variations of OA-110B, such as OA-101 and OA-100A.
  • the final product manufactured by this process will exhibit a fire point in excess of 300°C, a pour point (per ASTM standard method D97) of below -15°C.
  • the fluid will have a high dielectric strength of greater than about 30 Kv and preferably greater than about 35 Kv; and low dissipation loss at 25°C of less than about 0.01% and preferably less than about 0.008%, and at 100°C less than about 0.30% and preferably less than about 0.25%; and a viscosity of less than 112 cSt at 40°C.
  • a biodegradable dielectric fluid was prepared from a natural petroleum-derived saturated paraffin hydrocarbon purchased from Chevron.
  • the paraffinic petroleum had an initial fire point of 270°C.
  • the paraffinic petroleum is then processed by a thin-film evaporator to lower the range of molecular weight species represented by the fluid. This step removes 10 to 15% of the lighter molecular weight materials from the saturated paraffinic hydrocarbon. These are the lower boiling point constituents.
  • the effluent from the above evaporation process is treated by contacting the effluent with an adsorbent medium, such as Fullers Earth to remove polar contaminants.
  • an adsorbent medium such as Fullers Earth to remove polar contaminants.
  • the adsorbent medium was in the form of a slurry.
  • alkylated polystyrene was added to the composition.
  • the amount of polystyrene added is consistent with the required flow properties of the composition.
  • the polystyrene that is used is OA-100B manufactured by Argus Chemical Corporation.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Organic Insulating Materials (AREA)
EP92300365A 1991-01-17 1992-01-16 Fluide diélectrique résistant au feu Withdrawn EP0499359A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US64429191A 1991-01-17 1991-01-17
US644291 1996-05-10

Publications (1)

Publication Number Publication Date
EP0499359A1 true EP0499359A1 (fr) 1992-08-19

Family

ID=24584275

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92300365A Withdrawn EP0499359A1 (fr) 1991-01-17 1992-01-16 Fluide diélectrique résistant au feu

Country Status (3)

Country Link
EP (1) EP0499359A1 (fr)
FI (1) FI920216A (fr)
NO (1) NO920221L (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000026925A1 (fr) * 1998-11-04 2000-05-11 Shrieve Chemical Products, Inc. Fluides dielectriques respectueux de l'environnement
US6083889A (en) * 1999-02-05 2000-07-04 Exxon Research And Engineering Company High temperature, high efficiency electrical and transformer oil
EP1023733A1 (fr) * 1997-10-16 2000-08-02 Electric Fluids LLC Fluide dielectrique de qualite alimentaire
US6214776B1 (en) * 1999-05-21 2001-04-10 Exxon Research And Engineering Company High stress electrical oil
US6315920B1 (en) 1999-09-10 2001-11-13 Exxon Research And Engineering Company Electrical insulating oil with reduced gassing tendency
CN111286396A (zh) * 2020-03-30 2020-06-16 国网湖南省电力有限公司 改性高燃点变压器油及其制备方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4082866A (en) * 1975-07-28 1978-04-04 Rte Corporation Method of use and electrical equipment utilizing insulating oil consisting of a saturated hydrocarbon oil
GB2004299A (en) * 1977-04-28 1979-03-28 Nippon Oil Co Ltd Electrical Insulating Oil
EP0005008A1 (fr) * 1978-04-03 1979-10-31 Rte Corporation Mélange liquide de huiles isolants ayant une courbe plane de distribution du poids moléculaire
US4530782A (en) * 1982-09-30 1985-07-23 Mcgraw-Edison Company Electrical apparatus having an improved liquid dielectric composition

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4082866A (en) * 1975-07-28 1978-04-04 Rte Corporation Method of use and electrical equipment utilizing insulating oil consisting of a saturated hydrocarbon oil
GB2004299A (en) * 1977-04-28 1979-03-28 Nippon Oil Co Ltd Electrical Insulating Oil
EP0005008A1 (fr) * 1978-04-03 1979-10-31 Rte Corporation Mélange liquide de huiles isolants ayant une courbe plane de distribution du poids moléculaire
US4530782A (en) * 1982-09-30 1985-07-23 Mcgraw-Edison Company Electrical apparatus having an improved liquid dielectric composition

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1023733A1 (fr) * 1997-10-16 2000-08-02 Electric Fluids LLC Fluide dielectrique de qualite alimentaire
EP1023733A4 (fr) * 1997-10-16 2005-10-26 Electric Fluids Llc Fluide dielectrique de qualite alimentaire
WO2000026925A1 (fr) * 1998-11-04 2000-05-11 Shrieve Chemical Products, Inc. Fluides dielectriques respectueux de l'environnement
US6083889A (en) * 1999-02-05 2000-07-04 Exxon Research And Engineering Company High temperature, high efficiency electrical and transformer oil
US6214776B1 (en) * 1999-05-21 2001-04-10 Exxon Research And Engineering Company High stress electrical oil
JP2003500520A (ja) * 1999-05-21 2003-01-07 エクソンモービル リサーチ アンド エンジニアリング カンパニー 高ストレス電気絶縁油
US6315920B1 (en) 1999-09-10 2001-11-13 Exxon Research And Engineering Company Electrical insulating oil with reduced gassing tendency
CN111286396A (zh) * 2020-03-30 2020-06-16 国网湖南省电力有限公司 改性高燃点变压器油及其制备方法

Also Published As

Publication number Publication date
FI920216A (fi) 1992-07-18
NO920221L (no) 1992-07-20
NO920221D0 (no) 1992-01-16
FI920216A0 (fi) 1992-01-17

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