EP0012772A1 - Utilization of a glass-ceramic material as electrical insulator - Google Patents
Utilization of a glass-ceramic material as electrical insulatorInfo
- Publication number
- EP0012772A1 EP0012772A1 EP79901151A EP79901151A EP0012772A1 EP 0012772 A1 EP0012772 A1 EP 0012772A1 EP 79901151 A EP79901151 A EP 79901151A EP 79901151 A EP79901151 A EP 79901151A EP 0012772 A1 EP0012772 A1 EP 0012772A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- glass
- utilization
- electrical insulator
- weight
- ceramic material
- 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- Withdrawn
Links
- 239000006112 glass ceramic composition Substances 0.000 title claims abstract description 13
- 239000000615 nonconductor Substances 0.000 title claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000002775 capsule Substances 0.000 claims abstract description 6
- 239000002893 slag Substances 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims abstract description 4
- 239000012212 insulator Substances 0.000 claims description 21
- 229910018503 SF6 Inorganic materials 0.000 claims description 6
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 229960000909 sulfur hexafluoride Drugs 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 229910052717 sulfur Inorganic materials 0.000 abstract description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 239000004593 Epoxy Substances 0.000 description 6
- 239000004020 conductor Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000002241 glass-ceramic Substances 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
- C03C10/0063—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing waste materials, e.g. slags
-
- 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
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
- H01B3/08—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances quartz; glass; glass wool; slag wool; vitreous enamels
- H01B3/087—Chemical composition of glass
-
- 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
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
- H01B3/12—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances ceramics
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G5/00—Installations of bus-bars
- H02G5/06—Totally-enclosed installations, e.g. in metal casings
- H02G5/066—Devices for maintaining distance between conductor and enclosure
Definitions
- the present invention relates to utilization as electrical insulator of a glass-ceramic material made from blast furnace slag.
- an underground tube cable generally has an effective service length of at least 50 to 100 years, and to realize this aim v e ry high demands must be put on all details forming part of the cable, i.a. the required insulators which normally will not be replaced in the cable during the said period of time because of the highly complicated working moments associated with such a replacement. Therefore, in order to satisfy the high demands the insulators must have the following properties:
- the insulators have been made mainly from ceramic materials such as porcelain, of glass and of various epoxy compositions.
- the insulators consisting of epoxy material have proved to be those which are best suited for utilization in tube cables and tube capsules.
- Such insulators of epoxy material are manufactured by moulding, but the manufacturing process is highly complicated.
- the main object of the invention is to provide an electrical insulator which satisfies the demands set forth in the introductory part of this description, especial regard being taken to the requirement of resistance against ageing, simultaneously as the insulator is cheap to manufacture.
- This is rendered possible, according to the invention, by utilization as electrical insulator of a glass- ceramic material obtained from blast furnace slag, said glass-ceramic material having a content of CaO exceeding or equalling 10 per cent by weight, and preferably amounting to approximately 22 per cent by weight, the electrical insulator forming a pin insulator in a gas-insulated tube cable or tube capsule intended for high voltage.
- Glass- ceramic material or so-called glass-ceramics of the stated kind have proved to satisfy the aforestated demands on insulator material equally well as conventional glass- ceramic materials having a lower content of CaO and . produced from molten glass.
- As a starting material for glass-ceramic materials intended for insulators there is thus utilized extremely cheap so-called low-grade blast furnace slag which is intermixed with a suitable quantity, determinable in advance, of silica, Si0 2 , and treated in a controlled process utilizing high temperatur and high pressure.
- a material produced in this way and known under the denomination "Slaggsital" has the fol lowing particu lars:
- V-notch value 2.8 4.0 kgcms/cm 2
- the above-mentioned "Slaggsital" material has earlier been produced mainly in the shape of plates and discs and has been utilized as covering material in the building industry and as grinding material in the mining industry and the iron and steel industry and in the coal industry and also as acid-proof lining in the chemical industry.
- Figure 1 is a side view of a tube cable section which is partly cut up for the purpose of improved illustration
- Figure 2 is a sectional view on an enlarged scale of the tube cable shown in Figure 1.
- the tube cable consists of a sleeve which may be composed of an exterior part 10 and a shielding interior part 12. Disposed within the sleeve are three tubular conductors 14 of aluminium for three-phase operation which are applied symmetrically with a spacing from one another and the encasing sleeve, pin insulators 16 constructed in accordance with the principles of the invention and disposed in spaced relationship along the conductor units serving as spacing members. The ends of the cable section are closed by insulators also made according to the invention in the shape of end discs 18.
- the prefabricated tube cable sections can already in connection with the fabrication be filled with insulating medium up to operation pressure. When joining the sections together in the ground a minor quantity only of insulating medium need to be added. Alternately, all insulating medium may, of course, be supplied in one operation in connection with the mounting of the tube cable.
- the pin insulators 16 are directly secured onto the cable sleeve or (not shown), they may be mounted on a ring member which is inserted into the said sleeve.
- the insulating medium between the conductors 14 an t e conductors and the sleeve 10, 12 may consist of e.g. sulfur hexafloride, SF 6 , or gaseous nitrogen, N 2 , or a mixture of said gases. Oil may also be used in some cases.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Insulators (AREA)
- Inorganic Insulating Materials (AREA)
- Organic Insulating Materials (AREA)
- Installation Of Bus-Bars (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7802801 | 1978-03-10 | ||
| SE7802801A SE7802801L (sv) | 1978-03-10 | 1978-03-10 | Elektrisk isolator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0012772A1 true EP0012772A1 (en) | 1980-07-09 |
Family
ID=20334282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP79901151A Withdrawn EP0012772A1 (en) | 1978-03-10 | 1979-10-09 | Utilization of a glass-ceramic material as electrical insulator |
Country Status (5)
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4550301A (en) * | 1982-02-17 | 1985-10-29 | Raychem Corporation | PTC Circuit protection device |
| US4481498A (en) * | 1982-02-17 | 1984-11-06 | Raychem Corporation | PTC Circuit protection device |
| US4549161A (en) * | 1982-02-17 | 1985-10-22 | Raychem Corporation | PTC Circuit protection device |
| US4542365A (en) * | 1982-02-17 | 1985-09-17 | Raychem Corporation | PTC Circuit protection device |
| CN106517798B (zh) * | 2016-10-21 | 2019-05-17 | 北京科技大学 | 利用中、低钛型高炉渣制备微晶玻璃的方法 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB140874A (en) * | 1919-02-12 | 1920-04-08 | Thomas Frederick Hoare | Improvements in or relating to the utilization of slag as a building and other constructional material |
| US3022180A (en) * | 1959-09-23 | 1962-02-20 | Gen Electric | Ceramic material and method of making the same |
| US3006775A (en) * | 1959-09-23 | 1961-10-31 | Gen Electric | Ceramic material and method of making the same |
| BE639369A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1962-10-30 | |||
| FR1447653A (fr) * | 1965-09-22 | 1966-07-29 | Zd | Verre à base de scories métallurgiques et procédé d'obtention de pièces en verre cristallisé à partir de celui-ci |
| DE1696070C3 (de) * | 1968-02-07 | 1974-03-07 | Ordena Trudowowo Krasnowo Snameni Sawod, Awtosteklo, Konstantinowka (Sowjetunion) | Unter Verwendung von Hochofenschlacke herstellbares, thermisch entglasbares Glas mit niedriger Kristallisationstemperatur, insbesondere in Form eines kontinuierlichen Bandes, sowie Glaskeramik aus diesem Glas |
-
1978
- 1978-03-10 SE SE7802801A patent/SE7802801L/xx unknown
-
1979
- 1979-03-09 JP JP50048079A patent/JPS55500150A/ja active Pending
- 1979-03-09 WO PCT/SE1979/000050 patent/WO1979000737A1/en unknown
- 1979-10-09 EP EP79901151A patent/EP0012772A1/en not_active Withdrawn
- 1979-10-24 DK DK448579A patent/DK448579A/da unknown
Non-Patent Citations (1)
| Title |
|---|
| See references of WO7900737A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DK448579A (da) | 1979-10-24 |
| WO1979000737A1 (en) | 1979-10-04 |
| SE7802801L (sv) | 1979-09-11 |
| JPS55500150A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1980-03-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Looms | Insulators for high voltages | |
| EP0012772A1 (en) | Utilization of a glass-ceramic material as electrical insulator | |
| EP0372867B1 (en) | Optical fiber-containing insulators and process for producing same | |
| Kim et al. | Three-dimensional computed tomography and composition analysis of porcelain insulators for 154 kV power transmission lines | |
| JPH0465022A (ja) | 自動車用電線導体 | |
| EP1236209B1 (en) | Electrical cable having a hardgrade-epr insulation | |
| EP0279980A1 (en) | High voltage porcelain insulators | |
| US3903353A (en) | Glass conduit for electrical conductor | |
| CN216749418U (zh) | 一种耐高温耐弯折耐磨捣炉机电缆 | |
| US4166194A (en) | Gas-insulated bushing with self-adjusting bushing flange seal | |
| RU2760026C1 (ru) | Кабель силовой с экструдированными токопроводящими жилами (варианты) и способ его производства | |
| CN212209012U (zh) | 一种稀土高铁铝合金防火电缆 | |
| Brandstätter et al. | The discovery of iron barringerite in lunar meteorite Y-793274 | |
| US3442702A (en) | High-temperature magnet wire and apparatus and enamel composition for the insulation thereof | |
| CN111161912A (zh) | 连锁铠装型硅橡胶绝缘新能源高压电缆 | |
| CN108046590A (zh) | 一种高强度有色玻璃绝缘子材料 | |
| US1702332A (en) | Electric cable and method of manufacturing same | |
| GB2035666A (en) | Electric cable resistant to high temperatures | |
| SU1365143A1 (ru) | Полимерный изол тор | |
| CN216212521U (zh) | 一种用于轨道交通车辆的多功能光电复合缆 | |
| CN214226603U (zh) | 一种铝合金芯交联聚乙烯绝缘聚氯乙烯护套电力电缆 | |
| SU1296529A1 (ru) | Электроизол ционное стекло | |
| CN222260603U (zh) | 一种铜芯耐高温分支电缆 | |
| SU1694562A1 (ru) | Глазурь | |
| Ohki | Development of a low sag carbon fiber reinforced aluminum conductor for transmission lines [News from Japan] |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Designated state(s): FR |
|
| 17P | Request for examination filed | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19810917 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: WAERULF, OLOV Inventor name: ORPANA, VEIKKO Inventor name: WISUR, MATTI |