JPH0644534B2 - 電気誘導装置中のｐｃｂ含有アスカレル類をｐｃｂを含まない絶縁冷却剤と交換する方法 - Google Patents
電気誘導装置中のｐｃｂ含有アスカレル類をｐｃｂを含まない絶縁冷却剤と交換する方法Info
- Publication number
- JPH0644534B2 JPH0644534B2 JP60500183A JP50018384A JPH0644534B2 JP H0644534 B2 JPH0644534 B2 JP H0644534B2 JP 60500183 A JP60500183 A JP 60500183A JP 50018384 A JP50018384 A JP 50018384A JP H0644534 B2 JPH0644534 B2 JP H0644534B2
- Authority
- JP
- Japan
- Prior art keywords
- pcb
- tank
- cooling liquid
- coolant
- transformer
- 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 - Lifetime
Links
- 239000002826 coolant Substances 0.000 title claims description 62
- 238000000034 method Methods 0.000 title claims description 60
- 230000006698 induction Effects 0.000 title claims description 13
- 229940060144 ascarel Drugs 0.000 title description 30
- 239000012530 fluid Substances 0.000 claims description 78
- RELMFMZEBKVZJC-UHFFFAOYSA-N 1,2,3-trichlorobenzene Chemical compound ClC1=CC=CC(Cl)=C1Cl RELMFMZEBKVZJC-UHFFFAOYSA-N 0.000 claims description 69
- 239000000203 mixture Substances 0.000 claims description 43
- 239000000110 cooling liquid Substances 0.000 claims description 29
- 229920002545 silicone oil Polymers 0.000 claims description 22
- 238000010828 elution Methods 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 16
- 239000003921 oil Substances 0.000 claims description 15
- GBDZXPJXOMHESU-UHFFFAOYSA-N 1,2,3,4-tetrachlorobenzene Chemical compound ClC1=CC=C(Cl)C(Cl)=C1Cl GBDZXPJXOMHESU-UHFFFAOYSA-N 0.000 claims description 14
- 229930195733 hydrocarbon Natural products 0.000 claims description 13
- 150000002430 hydrocarbons Chemical class 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 11
- 239000002904 solvent Substances 0.000 claims description 10
- 238000010292 electrical insulation Methods 0.000 claims description 8
- PBKONEOXTCPAFI-UHFFFAOYSA-N 1,2,4-trichlorobenzene Chemical compound ClC1=CC=C(Cl)C(Cl)=C1 PBKONEOXTCPAFI-UHFFFAOYSA-N 0.000 claims description 6
- 239000004215 Carbon black (E152) Substances 0.000 claims description 6
- 238000009835 boiling Methods 0.000 claims description 6
- 150000002148 esters Chemical class 0.000 claims description 5
- 229920013639 polyalphaolefin Polymers 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims 1
- 230000001939 inductive effect Effects 0.000 claims 1
- 150000003071 polychlorinated biphenyls Chemical class 0.000 description 26
- 229920001296 polysiloxane Polymers 0.000 description 24
- 238000002386 leaching Methods 0.000 description 22
- 230000008569 process Effects 0.000 description 17
- 239000012809 cooling fluid Substances 0.000 description 11
- 238000009792 diffusion process Methods 0.000 description 11
- 238000009413 insulation Methods 0.000 description 10
- 239000007921 spray Substances 0.000 description 9
- 238000004458 analytical method Methods 0.000 description 8
- 230000033228 biological regulation Effects 0.000 description 8
- 239000002480 mineral oil Substances 0.000 description 8
- 239000011148 porous material Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 235000010446 mineral oil Nutrition 0.000 description 7
- 238000004821 distillation Methods 0.000 description 6
- -1 polydimethylsiloxane Polymers 0.000 description 6
- 238000011010 flushing procedure Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000012633 leachable Substances 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- XEMRAKSQROQPBR-UHFFFAOYSA-N (trichloromethyl)benzene Chemical class ClC(Cl)(Cl)C1=CC=CC=C1 XEMRAKSQROQPBR-UHFFFAOYSA-N 0.000 description 2
- BTAGRXWGMYTPBY-UHFFFAOYSA-N 1,2,3-trichloro-4-(2,3,4-trichlorophenyl)benzene Chemical compound ClC1=C(Cl)C(Cl)=CC=C1C1=CC=C(Cl)C(Cl)=C1Cl BTAGRXWGMYTPBY-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 2
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 2
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 150000007824 aliphatic compounds Chemical class 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 150000001491 aromatic compounds Chemical class 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000001983 electron spin resonance imaging Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000615 nonconductor Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 229950011008 tetrachloroethylene Drugs 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- XEMAWCCUFGLQBO-UHFFFAOYSA-N 1,2,3,4-tetrachlorobenzene;1,2,3-trichlorobenzene Chemical compound ClC1=CC=CC(Cl)=C1Cl.ClC1=CC=C(Cl)C(Cl)=C1Cl XEMAWCCUFGLQBO-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 238000006143 Gilbert reaction Methods 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 241000360136 Megavirus bus Species 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 241000779819 Syncarpia glomulifera Species 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 238000004380 ashing Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 238000002144 chemical decomposition reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 239000003480 eluent Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 150000002118 epoxides Chemical class 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000010808 liquid waste Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 235000012771 pancakes Nutrition 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000001739 pinus spp. Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920000151 polyglycol Polymers 0.000 description 1
- 239000010695 polyglycol Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 150000003613 toluenes Chemical class 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 description 1
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 229940036248 turpentine Drugs 0.000 description 1
- 239000004034 viscosity adjusting agent Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G21/00—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents
- C10G21/006—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents of waste oils, e.g. PCB's containing oils
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Organic Insulating Materials (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Fuel Cell (AREA)
- General Induction Heating (AREA)
- Hybrid Cells (AREA)
- Processing Of Solid Wastes (AREA)
- Transformer Cooling (AREA)
- Insulating Of Coils (AREA)
- Lubricants (AREA)
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US56630683A | 1983-12-28 | 1983-12-28 | |
| US67527884A | 1984-11-27 | 1984-11-27 | |
| US675278 | 1984-11-27 | ||
| PCT/US1984/002115 WO1985002937A1 (en) | 1983-12-28 | 1984-12-28 | Method for replacing pcb-containing askarels in electrical induction apparatus with pcb-free dielectric coolants |
| US566306 | 1995-12-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61500880A JPS61500880A (ja) | 1986-05-01 |
| JPH0644534B2 true JPH0644534B2 (ja) | 1994-06-08 |
Family
ID=27074146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60500183A Expired - Lifetime JPH0644534B2 (ja) | 1983-12-28 | 1984-12-28 | 電気誘導装置中のｐｃｂ含有アスカレル類をｐｃｂを含まない絶縁冷却剤と交換する方法 |
Country Status (20)
| Country | Link |
|---|---|
| EP (1) | EP0147860B1 (esLanguage) |
| JP (1) | JPH0644534B2 (esLanguage) |
| KR (1) | KR900005687B1 (esLanguage) |
| AR (1) | AR244461A1 (esLanguage) |
| AU (1) | AU570294B2 (esLanguage) |
| BR (1) | BR8407245A (esLanguage) |
| CA (1) | CA1262606A (esLanguage) |
| DE (1) | DE3462640D1 (esLanguage) |
| ES (1) | ES8605653A1 (esLanguage) |
| FI (1) | FI78367C (esLanguage) |
| GR (1) | GR82586B (esLanguage) |
| HK (1) | HK56389A (esLanguage) |
| IL (1) | IL73971A (esLanguage) |
| IN (1) | IN163604B (esLanguage) |
| MX (1) | MX168456B (esLanguage) |
| NZ (1) | NZ210768A (esLanguage) |
| PH (1) | PH23329A (esLanguage) |
| PT (1) | PT79758A (esLanguage) |
| SG (1) | SG22889G (esLanguage) |
| WO (1) | WO1985002937A1 (esLanguage) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4790337A (en) * | 1984-07-18 | 1988-12-13 | Quadrex Hps Inc. | Apparatus for removing PCB's from electrical apparatus |
| US4738780A (en) * | 1984-11-27 | 1988-04-19 | Union Carbide Corporation | Method for replacing PCB-containing coolants in electrical induction apparatus with substantially PCB-free dielectric coolants |
| DE3540291C2 (de) * | 1985-11-13 | 1994-11-24 | Ensr Corp | Verfahren zum Entfernen von Polychlorbiphenylen von elektrischen Vorrichtungen |
| US4879004A (en) * | 1987-05-07 | 1989-11-07 | Micafil Ag | Process for the extraction of oil or polychlorinated biphenyl from electrical parts through the use of solvents and for distillation of the solvents |
| US4950837A (en) * | 1989-07-18 | 1990-08-21 | General Electric Company | Method for reclassifying PCB transformers |
| US6380454B1 (en) | 1991-03-15 | 2002-04-30 | Luciano A. Gonzalez | Destruction of polychlorinated biphenyls |
| JPH0555054A (ja) * | 1991-08-26 | 1993-03-05 | Mitsubishi Electric Corp | 電気機器への媒体充填方法 |
| FR2705140B1 (fr) * | 1993-05-11 | 1995-07-28 | Elf Antar France | Procédé de remplacement du produit de lubrification pour la conversion des systèmes de réfrigération existant à des fluides frigorigènes sans action sur l'ozone atmosphérique. |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4124834A (en) | 1977-10-05 | 1978-11-07 | Westinghouse Electric Corp. | Electrical inductive apparatus |
| US4299704A (en) | 1980-05-19 | 1981-11-10 | General Electric Company | Method for removing polychlorinated biphenyls from contaminated transformer dielectric liquid |
| US4379746A (en) | 1980-08-18 | 1983-04-12 | Sun-Ohio, Inc. | Method of destruction of polychlorinated biphenyls |
| US4396436A (en) | 1981-07-20 | 1983-08-02 | Aluminum Company Of America | Method and flushing for removing hydraulic fluid from hydraulic systems |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR7703653A (pt) * | 1976-06-08 | 1978-04-04 | Rhone Poulenc Ind | Novos liquidos dieletricos |
| US4357175A (en) * | 1980-04-10 | 1982-11-02 | Stauffer Chemical Company | Process for cleaning the interiors of vessels |
-
1984
- 1984-12-27 IN IN1041/MAS/84A patent/IN163604B/en unknown
- 1984-12-27 ES ES539090A patent/ES8605653A1/es not_active Expired
- 1984-12-27 AR AR84299108A patent/AR244461A1/es active
- 1984-12-27 PH PH31662A patent/PH23329A/en unknown
- 1984-12-27 EP EP84116402A patent/EP0147860B1/en not_active Expired
- 1984-12-27 PT PT79758A patent/PT79758A/pt not_active IP Right Cessation
- 1984-12-27 GR GR82586A patent/GR82586B/el unknown
- 1984-12-27 DE DE8484116402T patent/DE3462640D1/de not_active Expired
- 1984-12-28 JP JP60500183A patent/JPH0644534B2/ja not_active Expired - Lifetime
- 1984-12-28 BR BR8407245A patent/BR8407245A/pt not_active IP Right Cessation
- 1984-12-28 MX MX203911A patent/MX168456B/es unknown
- 1984-12-28 WO PCT/US1984/002115 patent/WO1985002937A1/en not_active Ceased
- 1984-12-28 AU AU37832/85A patent/AU570294B2/en not_active Ceased
- 1984-12-28 CA CA000471203A patent/CA1262606A/en not_active Expired
- 1984-12-28 KR KR1019850700196A patent/KR900005687B1/ko not_active Expired
- 1984-12-30 IL IL73971A patent/IL73971A/xx unknown
-
1985
- 1985-01-04 NZ NZ210768A patent/NZ210768A/xx unknown
- 1985-08-28 FI FI853299A patent/FI78367C/fi not_active IP Right Cessation
-
1989
- 1989-04-11 SG SG22889A patent/SG22889G/en unknown
- 1989-07-13 HK HK563/89A patent/HK56389A/xx unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4124834A (en) | 1977-10-05 | 1978-11-07 | Westinghouse Electric Corp. | Electrical inductive apparatus |
| US4299704A (en) | 1980-05-19 | 1981-11-10 | General Electric Company | Method for removing polychlorinated biphenyls from contaminated transformer dielectric liquid |
| US4379746A (en) | 1980-08-18 | 1983-04-12 | Sun-Ohio, Inc. | Method of destruction of polychlorinated biphenyls |
| US4396436A (en) | 1981-07-20 | 1983-08-02 | Aluminum Company Of America | Method and flushing for removing hydraulic fluid from hydraulic systems |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3462640D1 (en) | 1987-04-16 |
| AU570294B2 (en) | 1988-03-10 |
| KR900005687B1 (ko) | 1990-08-06 |
| WO1985002937A1 (en) | 1985-07-04 |
| FI853299L (fi) | 1985-08-28 |
| FI78367B (fi) | 1989-03-31 |
| IL73971A (en) | 1988-12-30 |
| ES539090A0 (es) | 1986-03-16 |
| NZ210768A (en) | 1988-07-28 |
| BR8407245A (pt) | 1985-11-26 |
| AU3783285A (en) | 1985-07-12 |
| CA1262606A (en) | 1989-11-07 |
| PT79758A (en) | 1985-01-01 |
| KR850700178A (ko) | 1985-10-25 |
| PH23329A (en) | 1989-07-14 |
| GR82586B (en) | 1985-04-30 |
| MX168456B (es) | 1993-05-25 |
| JPS61500880A (ja) | 1986-05-01 |
| AR244461A1 (es) | 1993-10-29 |
| EP0147860A3 (en) | 1985-08-07 |
| ES8605653A1 (es) | 1986-03-16 |
| SG22889G (en) | 1990-07-06 |
| HK56389A (en) | 1989-07-21 |
| EP0147860B1 (en) | 1987-03-11 |
| IN163604B (esLanguage) | 1988-10-15 |
| FI78367C (fi) | 1989-07-10 |
| FI853299A0 (fi) | 1985-08-28 |
| EP0147860A2 (en) | 1985-07-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR900006534B1 (ko) | 전기 유도기구내 pcb-함유 냉각액을 pcb가 거의 함유되지 않은 냉각액으로 교체시키는 방법 | |
| US4744905A (en) | Method for replacing PCB containing coolants in electrical induction apparatus with substantially PCB-free dielectric coolants | |
| US4124834A (en) | Electrical inductive apparatus | |
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