-
1.发明公开
公开(公告)号：EP1042759A1
公开(公告)日：2000-10-11
申请号：EP98964595.7
申请日：1998-12-15
申请人： ABB AB
IPC分类号： H01B3/20
摘要： A dielectric gelling composition, exhibiting a thermo-reversible liquid-gel transition at a transition temperature, Tt, wherein the gel comprises an oil and a gelator with a block copolymer comprising an olefin based block and at least one further block comprising aromatic rings in its backbone structure, wherein each one of the two blocks has a molecular weight of more than 3000 g/mole, and the block with aromatic rings in its backbone structure exhibits a rigid backbone structure and a temperature dependent solubility in the oil, is disclosed. The gelling composition is produced by preparing the block copolymer by means of a condensation reaction and subsequently adding the resulting copolymer to an oil at a temperature above the transition temperature of the gelling composition. The gelling composition is used as an impregnant in an insulated direct current cable having at least one conductor and an impregnated insulation system. The insulation system comprises a solid electrically insulating dielectric part with a porous, fibrous and/or laminated structure impregnated with a dielectric gelling composition.
-
公开(公告)号：EP1297538A2
公开(公告)日：2003-04-02
申请号：EP01937104.6
申请日：2001-05-31
申请人： ABB AB
发明人： NORDBERG, Per , HANSSON, Ola , EKANDER, Hans , BERGKVIST, Mikael , FELIX, Johan , LILJENBERG, Annika , GUSTAFSSON, Karin
CPC分类号： H01B9/0688 , H01B3/22
摘要： An electric cable of the mass-impregnated non-draining type impregnated with a dielectric impregnating material. The dielectric impregnating material is liquid and the viscosity of the liquid impregnating material exhibits a low temperature dependency that gives the cable pressure dynamic properties, whereby it acquires a capability to accommodate and compensate for thermal and pressure gradients building up in the cable under operation. The acquired pressure dynamic properties minimize the risks of unfilled voids and the like discontinuities developing. At the lower range of operating temperatures, the dielectric liquid has a viscosity suitably high to ensure the non-draining features while it allows the liquid to flow under the influence of shear stresses typically developing in the radial direction in the cable insulation of a DC cable during operation. Further, the impregnating material, within the first lower range of temperatures, exhibits a minimized weak temperature dependency of the viscosity. At a higher range of impregnating temperature, it has a significantly lower viscosity to ensure the impregnation result. It exhibits a significant change in the viscosity over the limited transition range of temperatures.
-
公开(公告)号：EP1042761A1
公开(公告)日：2000-10-11
申请号：EP98964597.3
申请日：1998-12-15
申请人： ABB AB
IPC分类号： H01B3/20
摘要： A DC-cable having at least one conductor and an inpregnated insulation system is disclosed. The insulation system comprises a solid electrically insulating dielectric part with a porous, fibrous and/or laminated structure impregnated with an oil that comprises a gelling additive. The gelling additive molecule, which molecule comprises a polar part, group or segment, interacts with the oil and/or any other gelling additive molecule to form a gelled network of longer and/or more branched polymer molecules or cross-linking bridges in the oil, which thereby exhibits the flow properties of a highly viscous and elastic gel.
-
4.发明公开
公开(公告)号：EP1042760A1
公开(公告)日：2000-10-11
申请号：EP98964596.5
申请日：1998-12-15
申请人： ABB AB
发明人： KORNFELDT, Anna , FELIX, Johan , BERGKVIST, Mikael , NORDBERG, Per , TÖRNKVIST, Christer , SCHÜTTE, Thorsten
IPC分类号： H01B3/20
CPC分类号： H01B3/20 , Y10T428/2927 , Y10T428/2933 , Y10T428/294 , Y10T428/2971
摘要： Disclosed is a dielectric gelling composition, exhibiting a thermo-reversible liquid-gel transition at a transition temperature, Tt, wherein the gel comprises an oil and a combined gelator system having molecules of a polymer compound together with fine dielectric particles with a particle size in the nanometer, nm, range, preferably a particle size within the range from 0.001 to 1000 nm, the use of this dielectric gelling composition in an electric device comprising one or more conductors, a casing or enclosure and an insulation system comprising the dielectric gelling composition. An electric DC-cable having a conductor and an electrical insulation comprising a solid part with a porous, fibrous and/or laminated structure impregnated with the dielectric gelling composition and a method for production of such DC-cable wherein the combined gelator is prepared prior to impregnation are also disclosed.
-
5.发明授权THE USE OF A DIELECTRIC GELLING COMPOSITION, AN INSULATED ELECTRIC DC-CABLE COMPRISING SUCH GELLING COMPOSITION AND METHOD FOR MANUFACTURING AN INSULATED ELECTRIC DC-CABLE COMPRISING SUCH GELLING COMPOSITION 有权采用介质胶凝的组合物，介电SOCHER的分离的直流电源线胶凝组合物及其制备与这样的胶凝组合物的直流电缆方法
公开(公告)号：EP1042760B1
公开(公告)日：2004-04-14
申请号：EP98964596.5
申请日：1998-12-15
申请人： ABB AB
发明人： KORNFELDT, Anna , FELIX, Johan , BERGKVIST, Mikael , NORDBERG, Per , TÖRNKVIST, Christer , SCHÜTTE, Thorsten
IPC分类号： H01B3/20
CPC分类号： H01B3/20 , Y10T428/2927 , Y10T428/2933 , Y10T428/294 , Y10T428/2971
-
6.发明公开
公开(公告)号：EP1042764A1
公开(公告)日：2000-10-11
申请号：EP98964598.1
申请日：1998-12-15
申请人： ABB AB
IPC分类号： H01B9/06
CPC分类号： H01B9/0688 , Y10T428/2933 , Y10T428/2936 , Y10T428/294 , Y10T428/2971
摘要： A method for manufacture of an electric device having at least one conductor and a porous, fibrous and/or laminated electrically insulating dielectric system comprising a solid electrically insulating part impregnated with a dielectric fluid and a porous, fibrous and/or laminated body for use in an electric device produced with the method. The method comprises the steps of: providing a conductor and a porous, fibrous and/or laminated structure of a solid electrically insulating material associated with each other, pretreating the porous, fibrous and/or laminated body with a gelling additive such that the body comprises the gelling additive which imparts a high viscosity and elasticity to the fluid at conditions for which the device is designed to operate under, impregnating the pretreated body comprising the gelling additive with the dielectric fluid, wherein the gelling additive upon impregnation is brought into contact with the dielectric fluid and the gelling additive, at least in part, is dissolved by the fluid such that following the impregnation the dielectric fluid is gelled.
-
-
-
-
-
搜索结果
6 条记录 (耗时 0.012 秒)
