EP2283493A1 - Duct with a base active piece and an insulation device - Google Patents
Duct with a base active piece and an insulation deviceInfo
- Publication number
- EP2283493A1 EP2283493A1 EP09757031.1A EP09757031A EP2283493A1 EP 2283493 A1 EP2283493 A1 EP 2283493A1 EP 09757031 A EP09757031 A EP 09757031A EP 2283493 A1 EP2283493 A1 EP 2283493A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- insulating
- electro
- films
- plastic
- active part
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/26—Lead-in insulators; Lead-through insulators
- H01B17/28—Capacitor type
Definitions
- the invention relates to a bushing and an insulation device according to the preamble of the respective independent device claim and to a method for producing a bushing according to the preamble of the independent method claim.
- the insulation device is used in high voltage engineering as a base element for the construction of bushings in the voltage range of 6 kV to 800 kV AC and DC voltage, but can also be used for measuring transformers, capacitors and supporters.
- the state of the art is the following bushings with integrated controls for high voltage arrangements between two potentials or between high voltage potential and ground potential.
- bushing consisting of calendered electrical insulating paper or crepe insulating paper coated with a resin layer in the unpolymerized state, wound under heat and pressure on a metal tube or tube of insulating material, or cylinder or insulating rod with inserted control electrodes of metal or conductive material layer.
- IEC standard 60137 for feedthroughs the following insulation feeders with integrated high voltage control can be distinguished between two potentials or between high voltage potential and ground potential: oil impregnated paper (0IP), resin impregnated paper (RIP), resin coated paper (RBP) and gas insulated insulation means.
- Applications are as follows: Feedthroughs for transformers, feedthroughs for GIS systems, where GIS stands for "gas insulated switchgear”, connections of GIS systems with transformers, feedthroughs or generator feedthroughs Insulating devices are also used for high-voltage transducers.
- the following controls can be distinguished: a continuous control with variable electrode width, a double control with a constant width, a simple control with a constant width, a coarse control with ring electrode at the edge of the layer or a coarse control with earth electrode.
- Oil-impregnated paper is characterized by a high permissible operating field strength, the presence of an organic dielectric, cost-effective production, high reliability, a long service life, a flexible dielectric, a very good heat transfer (conductor-insulator surface) and TE utilization values of 2 pC to 5 pC, which are easily accessible.
- a disadvantage is the presence of degradable mineral oil or vegetable oil between the active part and the insulator wall, which can flow out if damaged.
- Another disadvantage is a limitation of the permissible field strength by the strength of the impregnated insulating paper, a horizontal mounting position is possible only with built-in compensator and a need for porcelain or composite insulator for operation.
- allowable field strength similar to that of OIP, is a dry dielectric, a mounting orientation independent, and silicone screens that can be applied directly to the active part.
- the disadvantage is a complex and material-intensive production process (more expensive than OIP), TE values must for life expectancy ⁇ 2 pC, inelastic active part can cause internal stress, a poor thermal conductivity of the dielectric compared to OIP, no organic dielectric and an epoxy resin outer surface of the active part which has to be over-turned.
- Resin-coated paper is characterized by a dry dielectric and a mounting orientation.
- a disadvantage is a low TE input voltage, high permissible TE values during operation, which are not tolerated by a transformer builder and an active part outer surface, which must be over-tightened.
- SF 6 gas-insulated devices that z. B. use SF 6 as a gas, a dry dielectric, a mounting position independence, a simple manufacturing process and a TE value ⁇ 2 pC.
- the disadvantage is a limitation of the permissible field strength at the layer edges by the SF 5 -GaS and its gas pressure, thus no high utilization of the dielectric is possible.
- Another disadvantage is an undesirable affiliation of the SFe gas to the greenhouse gases, a negative pressure of the insulator, which usually requires the use of composite insulators for safety reasons, as well as a limitation of the minus temperature range down by the gas pressure.
- Line 501 is a potential line determined by control pads 502.
- An insulation 503 made of oil paper or gas-impregnated foil is between see a conductor 504 at high voltage potential and an electrode 505.
- a base active part 506 is hermetically sealed from the environment by a porcelain insulator or composite insulator 507.
- a gap or gap 508 between see active part and insulator is filled with an insulating liquid or insulating gas, such as air, SF 6 , N 2 , etc. under pressure of 1 bar to 6 bar.
- a high voltage is applied to a terminal 509.
- a high voltage electrode 510 has the same potential as the terminal 509.
- a terminal 511 to the transformer or the gas insulated switchgear (GIS) is connected to the terminal 509 through the conductor 504.
- the control electrode 505 is connected to a flange 512 and connected to ground potential 513.
- the present invention has for its object to provide a bushing and an insulating device, which do not have the disadvantages associated with a conventional implementation or isolation device described above, regardless of the installation position, no porcelain or composite insulators require and can be easily manufactured ,
- a conductor, plastic-electro-foils, control electrodes and an earth electrode In particular, in the implementation according to the invention with a base active part and an insulating device of the base active part a conductor, plastic-electro-foils, control electrodes and an earth electrode.
- the insulating device has a shrink tube made of an electrically insulating material.
- the basic active part together with the shrink tube allows a hermetically sealed base-active part without insulator which is synonymous with a dry active part. Also, any installation position is possible in the inventive implementation, there are no porcelain or composite insulators needed and the inventive implementation can be made low.
- the plastic-electro-foils, the control electrodes and their edges are provided with a low-viscosity insulating under vacuum
- the insulating liquid has a viscosity between 8 m 2 / s and 20 m 2 / s at 40 0 C
- an alternative low-viscosity insulating liquid which crosslinks at a crosslinking temperature of at least 50 0 C
- the alternative insulating liquid has a viscosity between 20 m 2 / s and 100 m 2 / s at 40 0 C.
- Impregnation with a flexible silicone gel or insulating liquid of high dielectric strength provides an elastic dielectric and allows the use of an inventive insulating device for implementation in the following temperature ranges, which are typically required for such insulation: Outside temperature of -50 0 C to +60 0 C resp. Operating temperature due to the self-heating of the insulation device from -5O 0 C to + 12O 0 C. Thus, there is no impregnation tion with an epoxy or polyurethane resin system.
- the insulation device has a good thermal conductivity and achieves a high utilization of the dielectric, wherein the field strengths in the AC test are defined by the following two criteria:
- the plastic-electro-films are arranged on a metal tube, a tube made of insulating material or an insulating rod.
- the metal tube with the plastic-electro-films arranged thereon is also the conductor.
- control electrodes comprise control foils of Al foils, vapor-deposited Al control foils or conductive material layers. It is also possible to use printed metal electrodes or printed or sprayed-on metal layers or conductive material layers as electrodes.
- the single or double control was determined and selected as the electrodes Al foils, evaporated aluminum or a conductive material layer. Thus, either a use of dual or single control is possible. This results in a simple production process and an automatic production of the invented According to the implementation with integrated electrodes is also possible.
- the plastic-electro films include polyester-electro films, wherein the polyester-electro films have a surface roughness of 0.07 ⁇ m to 0.5 ⁇ m and no inclusions of conductive particles and no defects are present.
- the polyester-electro films have a thickness of 10 ⁇ m to 80 ⁇ m, especially a thickness of 18 ⁇ m to 36 ⁇ m.
- the polyester-electro-films may, for. B. have a thickness of 18, 36 or 72 microns.
- Another aspect of the present invention relates to an insulation device for a bushing, which has a shrink tube made of an electrically insulating material.
- the basic active part together with the shrink tube allows a hermetically sealed base-active part without insulator which is synonymous with a dry active part. Also, any mounting position is possible in the inventive insulation.
- the insulation device according to the invention further comprises silicone screens which are applied to the shrink tubing.
- the heat-shrinkable tube is a fluoroplastic.
- Shrink tubing in particular of FEP (fluorinated ethylene)
- a Viton-E® shrink tubing be used.
- the heat-shrinkable tube is shrunk by heat to the active part during the manufacturing process.
- the basic active part enclosed by the insulating device is hermetically sealed from the environment by the shrinking tube.
- the shrink tubing can also be provided with O-rings or with a hot melt on its inside for better sealing.
- silicone screens can be used easy to integrate on the active part.
- the active part has a surface for the direct application of outer silicone shades for outdoor use.
- a further aspect of the present invention relates to a method for producing a leadthrough with a base active part and an insulating device, wherein the base active part comprises a conductor, plastic-electro-foils, control electrodes and an earth electrode, in which a shrink tube consists of a insulating material is disposed around the base active part around and shrunk under heat.
- control electrodes and their edges are provided under vacuum with an elastic and low-viscosity insulating liquid, or with an alternative low-viscosity insulating liquid which crosslinks at a crosslinking temperature of at least 50 ° C.
- the insulating liquid can be the property have that after a heat process, the insulating liquid passes into an elastic state.
- FIG. 2 shows a section through an exemplary embodiment of a bushing according to the invention with an insulating device according to the invention.
- FIG. 2 shows a section through an exemplary embodiment of a bushing according to the invention with an insulating device according to the invention and a control using the example of a transformer outdoor bushing.
- Line 1 is a potential line (60%) determined by control electrodes 2.
- a film insulation with plastic-electro-films 3 is between a conductor 4 at high voltage potential and a ground electrode 5.
- a base active part 6, which comprises the conductor 4, the Folienisolier worn with the plastic electro-foils 3, control electrodes 2 and the earth electrode 5 is hermetically separated from the environment by a shrink tube 8.
- a prior art gap 508 (see FIG. 1) is no longer present.
- an existing in the prior art insulator 507 has been replaced by silicone screens 7 on the shrink tube 8.
- the high voltage is applied to a terminal 9, and a high voltage electrode 10 has the same potential as the terminal 9.
- a terminal 11 to the transformer is connected to the high voltage terminal 9 through the conductor 4.
- the control electrode (earth electrode 5) is connected to a flange 12 and placed at ground potential 13.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulators (AREA)
- Insulating Bodies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH8452008 | 2008-06-04 | ||
CH02001/08A CH698971A1 (en) | 2008-06-04 | 2008-12-22 | Isolation device. |
PCT/CH2009/000183 WO2009146570A1 (en) | 2008-06-04 | 2009-06-04 | Duct with a base active piece and an insulation device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2283493A1 true EP2283493A1 (en) | 2011-02-16 |
EP2283493B1 EP2283493B1 (en) | 2017-09-27 |
Family
ID=40849186
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09757031.1A Not-in-force EP2283493B1 (en) | 2008-06-04 | 2009-06-04 | Duct with a base active piece and an insulation device |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2283493B1 (en) |
CN (1) | CN102057447B (en) |
CH (1) | CH698971A1 (en) |
WO (1) | WO2009146570A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012200249B3 (en) | 2012-01-10 | 2012-10-31 | Siemens Aktiengesellschaft | X-ray tube i.e. rotary anode X-ray tube, has electrical bushing electrically isolating transmission line from housing and comprising two radial isolation layers that are separated from each other by metallic covering |
CN103500967A (en) * | 2013-10-22 | 2014-01-08 | 国家电网公司 | Resin impregnated paper capacitance type extra-high-voltage alternating current-direct current wall bushing |
EP2911255A1 (en) * | 2014-02-19 | 2015-08-26 | ABB Technology Ltd | High voltage lead-through device and method of manufacturing the same |
DE102018215274A1 (en) * | 2018-09-07 | 2020-03-12 | Siemens Aktiengesellschaft | Arrangement and method for potential reduction in high voltage technology |
CN112578242A (en) * | 2020-12-07 | 2021-03-30 | 国网北京市电力公司 | Method and system for determining breakdown voltage of transformer oil paper insulation system |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1122120B (en) * | 1955-06-13 | 1962-01-18 | Westinghouse Electric Corp | Process for the production of a coiled, solid electrical conductor insulation |
US3539703A (en) * | 1968-10-23 | 1970-11-10 | High Voltage Power Corp | High voltage termination apparatus for high voltage cables and pipetype transmission lines |
US3794750A (en) * | 1973-07-27 | 1974-02-26 | Boston Insulated Wire & Cable | Shielded cable |
DE2946172A1 (en) * | 1979-11-15 | 1981-05-21 | Siemens AG, 1000 Berlin und 8000 München | HIGH VOLTAGE PROCEDURE |
DE3001779C2 (en) * | 1980-01-18 | 1987-01-02 | Siemens AG, 1000 Berlin und 8000 München | High-voltage bushing with layers of embossed insulating foils |
GB8608484D0 (en) * | 1986-04-08 | 1986-05-14 | Raychem Gmbh | Electrical apparatus |
EP0348395A1 (en) * | 1987-12-19 | 1990-01-03 | Isovolta, Osterreichische Isolierstoffwerke Aktiengesellschaft | Electrically insulating component and process for manufacturing it |
CH677565A5 (en) * | 1988-11-10 | 1991-05-31 | Asea Brown Boveri | |
CN2394299Y (en) * | 1999-07-24 | 2000-08-30 | 襄樊国网合成绝缘子股份有限公司 | Capacitor style stythetic casing |
CN1427423A (en) * | 2001-12-19 | 2003-07-02 | 孟繁恒 | AC high voltage sleeve |
-
2008
- 2008-12-22 CH CH02001/08A patent/CH698971A1/en not_active Application Discontinuation
-
2009
- 2009-06-04 CN CN2009801207923A patent/CN102057447B/en not_active Expired - Fee Related
- 2009-06-04 EP EP09757031.1A patent/EP2283493B1/en not_active Not-in-force
- 2009-06-04 WO PCT/CH2009/000183 patent/WO2009146570A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2009146570A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2283493B1 (en) | 2017-09-27 |
WO2009146570A1 (en) | 2009-12-10 |
CN102057447A (en) | 2011-05-11 |
WO2009146570A9 (en) | 2010-11-11 |
CN102057447B (en) | 2012-08-29 |
CH698971A1 (en) | 2009-12-15 |
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