CN101479814A - Integrated outdoor termination for a high voltage cable - Google Patents
Integrated outdoor termination for a high voltage cable Download PDFInfo
- Publication number
- CN101479814A CN101479814A CNA2006800545577A CN200680054557A CN101479814A CN 101479814 A CN101479814 A CN 101479814A CN A2006800545577 A CNA2006800545577 A CN A2006800545577A CN 200680054557 A CN200680054557 A CN 200680054557A CN 101479814 A CN101479814 A CN 101479814A
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- CN
- China
- Prior art keywords
- stress cone
- terminals
- terminals according
- terminal
- tension cable
- 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.)
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Classifications
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- 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
- H02G15/00—Cable fittings
- H02G15/02—Cable terminations
- H02G15/06—Cable terminating boxes, frames or other structures
- H02G15/064—Cable terminating boxes, frames or other structures with devices for relieving electrical stress
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- Cable Accessories (AREA)
- Insulators (AREA)
Abstract
An integrated outdoor terminal is disclosed that reduces the effects of environmental and electrical stresses by integrating a first portion, second portion and plurality of sheds into a one-piece insulation body. The first portion includes an integrated first connector for connecting the outdoor terminal to a high voltage cable. The second portion functions as a stress cone and connects with a second terminal for connecting with ground. The first portion has a generally cylindrical shape and the stress cone has a generally conical shape. The first portion transitions into the second portion without any abrupt changes in cross-sectional area, thus avoiding an increase in electric fields. The integrated outdoor termination may be prefabricated using a material such as silicone. The sheds extend approximately perpendicular to and may be uniformly distributed along the longitudinal axis of the insulation body. By uniformly distributing the sheds, the risk of flashover is avoided.
Description
Background technology
In many cases, electric power all is by being positioned at outdoor cable transmission, in order to reduce the power loss that causes by the resistance in the cable, electric power often transmits with the voltage that surpasses 50KV, in order to finish cable, must be connected a transition between cable conductor and ground connection, this transition must be able to be born the voltage drop between cable conductor and the ground connection, and these transition are commonly referred to as " terminals ".Because the high pressure of cable, and cable and terminals are positioned at the outdoor fact, terminals are subjected to electric and influence environmental stress, environmental stress comprises the fluctuation of water, dust, snow, wind and temperature, electric stress is generally caused by terminals itself, and comprises high electric field strength, leakage current (" leakage ") and flashover.
Outdoor termination generally comprises a partial assembled structure, and in the partial assembled structure, a plurality of parts are assembled to form terminals.Fig. 2 shows an example of the outdoor termination that is used for high-tension cable with partial assembled structure, outdoor termination 200 comprises three parts, i.e. 202,204 and stress cones 208 of two insulation assemblies, first insulation assembly 202 comprises the first terminal 212 that is used for terminals 200 are connected to the high-tension cable (not shown), and high-tension cable enters into terminals 200 by the first terminal 212.The part of the cable that is held by first insulation assembly 202 is shelled backward to insulation position, and is connected to the first terminal 212 by connector.Stress cone 208 comprises second terminal 214 that is used for earth cable is connected to the ground connection (not shown), second terminal 214 comprises suction casing and clip, earth cable enters in the terminals 200 by suction casing, and clip is connected to second terminal 214 with earth cable.
Two insulation assemblies 202,204 comprise a plurality of full skirts 206, and full skirt 206 has reduced dust and/or the water that accumulates on the terminals, and this has reduced the generation of leakage and flashover.Two insulation assemblies 202,204 link together, and second insulation assembly 204 is connected to stress cone 208.Outdoor termination 200 can prefabricated before use and assembling.
For machinery and the electric property of improving terminals, insulator can be by the silicones manufacturing, and silicones provides the performance of dust and water protection, and can reduce flashover and arc discharge in the terminals.In addition, silicones can enlarge the temperature that terminals can bear and the scope of other environmental factors.
Even have the advantage that silicones provides, the terminals with partial assembled structure still suffer electric and influence environmental stress.For example, the maximum electric field intensity of terminals 200 appears at the junction point between insulation assembly 204 and the stress cone 208, because do not have full skirt in this this position, dust and water just gather, and cause flashover, particularly in comprising rainy or moist environment.In addition, lack full skirt and also cause having electric current to leak at junction point between insulation assembly 204 and the stress cone 208 and the junction point between insulation assembly 202,204.
Summary of the invention
Disclose a kind of integrated outdoor termination, described integrated outdoor termination reduces environment and electric stress influence by first, second portion and a plurality of full skirt are integrated into the single-piece insulator.Described first, described second portion and described full skirt can be molded together, and become single-piece, make described insulator not comprise the cross section seam.Described first comprises the first integrated connector, the described first integrated connector is used for described outdoor termination is connected to high-tension cable, described second portion links to each other with second terminal that is used to be connected ground connection, described second terminal is used for linking to each other with ground connection, and described second portion plays stress cone.Described first has the shape of substantially cylindrical, and described stress cone has conical substantially shape, and described first just carries out the transition in the described second portion without any unexpected variation on sectional area, thereby has avoided the increase of electric field.Described integrated outdoor termination can use prefabricated such as silicones.
The longitudinal axis that described full skirt is approximately perpendicular to described insulator extends, and can distribute equably along the longitudinal axis of described insulator.By the described full skirt that distributes equably, avoided the risk of flashover.
Description of drawings
By the reference the following drawings and description, the present invention may be better understood, and the parts in the described accompanying drawing need not in proportion and emphasize, is used to illustrate principle of the present invention but place.In these accompanying drawings, except as otherwise noted, identical Reference numeral refers to identical part, parts, assembly or step.
Fig. 1 is the isometric view of outdoor termination;
Fig. 2 is the exploded isometric view according to the outdoor termination of prior art;
Fig. 3 is the front plan views of outdoor termination; And
Fig. 4 is the cutaway view of the described outdoor termination among Fig. 3.
Embodiment
The integrated terminals that are used for high-tension cable (each " integrated outdoor termination ") are provided, and it is fit to outdoor use.Integrated outdoor termination comprises single-piece, and single-piece has been eliminated seam between the different separate parts and discontinuous substantially, and therefore, outdoor termination has reduced environment and electric stress influence.Fig. 1 shows an example of integrated outdoor termination 100.The second portion 114 that integrated outdoor termination 100 generally comprises first 116 and plays the stress cone effect, outdoor termination 100 also can comprise a plurality of full skirts 112, and the outer surface 120 that full skirt 112 is approximately perpendicular to insulator 110 extends.First 116, stress cone 114 and full skirt 112 are linked to be integral body fully, to form single-piece insulator 110.
Integrated outdoor termination 100 also can comprise the first terminal 102, and the first terminal 102 can be linked to be integral body with first 116, and integrated outdoor termination 100 can be connected with the high-tension cable (not shown).The first terminal 102 can comprise unscreened undulatory connector (not shown).For high-tension cable is connected with terminals 100, the insulation on the high-tension cable can be peeled off backward, undulatory connector is crimped onto on the cable.Yet the first terminal 102 can comprise the connector of other types.Outdoor termination 100 can comprise that also second terminal, 104, the second terminals 104 (only showing a part) can be linked to be integral body with stress cone 114, and stress cone 114 makes integrated outdoor termination 100 be connected with the ground connection (not shown).
First 116 can comprise the shape of substantially cylindrical, and stress cone 114 can comprise conical substantially shape.Carry out the transition to place the stress cone 114 at insulator 110 from first 116, stress cone 114 comprise with the diameter of section of first about equally and along the direction increased cross-section diameter of second terminal 104.Therefore, can avoid the unexpected variation of the diameter between first 116 and the second portion 114, this unexpected variation may cause the electric field that increases.In addition, the diameter of section of stress cone 114 can reach its maximum in certain the some place between the first 116 and second terminal 104, can reduce along the direction of second terminal 104 then.Yet in any position, the diameter of section of stress cone 114 is general all greater than the diameter of section of first 116.
Insulator 110 generally comprises along outer surface 120 location of insulator and is linked to be whole full skirt 112 with the outer surface 120 of insulator, therefore, first 116 and stress cone 114 generally comprise a plurality of full skirts 112, and full skirt 112 can distribute equably along the longitudinal axis 126 of insulator 110.By the full skirt 112 that distributes equably, those full skirts 112 in the zone with maximum field intensity 122 have particularly been avoided such as the risk by the flashover that gathering caused of rain and dust.
In order to build the integrated outdoor termination of single-piece 100, first 116, second portion 114 and full skirt 112 are molded together, to form single-piece, therefore, insulator 110 does not generally comprise the cross section seam in first 116 or between first 116 and stress cone 114.Integrated outdoor termination 100 can use prefabricated such as silicones.
Fig. 3 and Fig. 4 show an example of integrated outdoor termination.As shown in Figure 4, integrated outdoor termination 300 comprises longitudinal axis 378, and can be roughly symmetrical along this longitudinal axis 378.Terminals comprise first 316, second portion 314 and a plurality of full skirt 312, and these elements are linked to be integral body each other, to form single-piece insulator 310.Insulator 310 is linked to be integral body with the first terminal 302 and second terminal 304, to form the integrated outdoor termination 300 as single-piece.In addition, the first terminal 302, first 316, second portion 314 and second terminal 304 are linked to be integral body, make that the transition between their outer surface is level and smooth substantially roughly not coaxial seam or discontinuous.Therefore, because outdoor termination 300 comprises a basic level and smooth single-piece, so just avoided because seam and/or the discontinuous leakage that causes.
The outer surface 320 of full skirt and insulator 310 is linked to be integral body, makes them to distribute along outer surface 320, and is approximately perpendicular to the longitudinal axis 378 of terminals 300, and full skirt 312 can distribute equably.Because terminals 300 comprise single-piece, so full skirt 312 can be located along the second portion 314 that plays the stress cone effect and along the transition between first 316 and the second portion 314, therefore, can in these zones that experience maximum electric field intensity usually, reduce leakage and flashover.
Fig. 3 comprises the exemplary dimensions in millimeter of the integrated outdoor termination 300 that is fit to the 138KV application, yet, integrated terminals 300 can amplify and are used for higher electric pressure, for example 220KV and 500KV, or scaled being used for such as the application under the lower voltage of 69KV.The total length of integrated outdoor termination 300 comprises first connector 302 and second connector 304, is approximately 1400mm.The diameter of the first terminal approximately is 86mm, and the distance first full skirt on from the end of second connector 304 (only showing a part) to stress cone 314 approximately is 141mm, and the wideest part of stress cone 314, comprises full skirt 312, is 332mm.The full skirt 312 of terminals 300 becomes the angle of 8 degree with horizontal line, horizontal line is approximately perpendicular to the longitudinal axis 326 of terminals 300, the end 311 of full skirt 312 is recessed with respect to second connector 304 substantially, makes end 311 point to second connector 304, and end 311 has the radius of about 2.5mm.Full skirt 312 comprises recessed substantially part 321, and the about 12mm of the radius of recessed substantially part 312 is long, and this provides from full skirt 312 to insulator the transition of 310 outer surface 320.In addition, full skirt 312 extends 45mm or 70mm from the outer surface 320 of insulator 310, and separates about 48mm about equally to about 52mm along the outer surface 320 of insulator 310.
Although described different embodiments of the invention, it is evident that within the scope of the invention to have more embodiment and execution mode, therefore but for those skilled in the art,, the present invention is with unrestricted, unless consider claims and equivalent thereof.
Claims (18)
1. single-piece terminals that are used for high-tension cable comprise:
Stress cone, it is configured to be connected with ground connection; And
The part that is linked to be integral body and is configured to be connected with described stress cone with described high-tension cable.
2. terminals according to claim 1 also comprise with described part being linked to be whole the first terminal.
3. terminals according to claim 2, wherein, described the first terminal is configured to admit described high-tension cable.
4. terminals according to claim 1 also comprise with described stress cone being linked to be the second whole terminal.
5. terminals according to claim 4, wherein, described second terminal construction is for admitting earth cable.
6. terminals according to claim 1 also comprise a plurality of full skirts.
7. terminals according to claim 6, wherein, described a plurality of full skirts and described part are linked to be integral body.
8. terminals according to claim 6, wherein, described a plurality of full skirts roughly distribute equably along described part.
9. terminals according to claim 6, wherein, described a plurality of full skirts and described stress cone are linked to be integral body.
10. terminals according to claim 6, wherein, described a plurality of full skirts roughly distribute equably along described stress cone.
11. terminals according to claim 1, wherein, described part comprises the shape of substantial cylindrical.
12. terminals according to claim 1, wherein, described stress cone comprises the shape of conical shaped.
13. terminals according to claim 1 also comprise silicones.
14. terminals according to claim 1, wherein, described part carries out the transition in the described stress cone smoothly.
15. terminals according to claim 1, wherein, described high-tension cable is configured to support at least approximately voltage of 69kV.
16. terminals that are used for high-tension cable comprise:
Stress cone, it is configured to be connected with ground connection;
Be configured to the part that is connected with described high-tension cable; And
A plurality of full skirts; Wherein, described stress cone, part and a plurality of full skirt are linked to be integral body, to form single-piece.
17. a method that is used for making the terminals that are used for high-tension cable, described method comprises:
The die stress awl, described stress cone is configured to be connected with ground connection;
The molded part that is connected with described high-tension cable of being constructed to; And
Molded a plurality of full skirt;
Wherein, described stress cone, part and a plurality of full skirt are molded to form single integration member.
18. method according to claim 17, wherein, described terminals are made before installation.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2006/018367 WO2007133202A1 (en) | 2006-05-11 | 2006-05-11 | Integrated outdoor termination for a high voltage cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101479814A true CN101479814A (en) | 2009-07-08 |
| CN101479814B CN101479814B (en) | 2013-03-13 |
Family
ID=38694177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200680054557.7A Active CN101479814B (en) | 2006-05-11 | 2006-05-11 | Integrated outdoor termination for a high voltage cable |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP2016595A4 (en) |
| CN (1) | CN101479814B (en) |
| BR (1) | BRPI0621663A2 (en) |
| CA (1) | CA2650516C (en) |
| MX (1) | MX2008014201A (en) |
| WO (1) | WO2007133202A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2694813C (en) | 2007-08-08 | 2013-09-24 | G & W Electric Company | Cable termination for high-voltage cable application |
| EP3183788B1 (en) | 2014-08-22 | 2020-04-08 | NKT HV Cables AB | Electric field control device for high power cable and method for manufacturing thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2835725A (en) * | 1954-02-01 | 1958-05-20 | G & W Electric Speciality Co | High voltage electric terminator |
| US5466891A (en) * | 1994-04-08 | 1995-11-14 | Abb Power T&D Company Inc. | Conical composite SF6 high voltage bushing with floating shield |
| JPH09251816A (en) * | 1996-03-15 | 1997-09-22 | Ngk Insulators Ltd | Die system for molding composite bushing sheath |
| JP4005214B2 (en) * | 1998-04-28 | 2007-11-07 | 日本碍子株式会社 | Tapered composite insulator and method for molding outer casing thereof |
| JP2002157932A (en) * | 2000-11-21 | 2002-05-31 | Furukawa Electric Co Ltd:The | Organic composite porcelain tube and its manufacturing method |
-
2006
- 2006-05-11 CN CN200680054557.7A patent/CN101479814B/en active Active
- 2006-05-11 MX MX2008014201A patent/MX2008014201A/en active IP Right Grant
- 2006-05-11 WO PCT/US2006/018367 patent/WO2007133202A1/en active Application Filing
- 2006-05-11 CA CA2650516A patent/CA2650516C/en active Active
- 2006-05-11 BR BRPI0621663-3A patent/BRPI0621663A2/en not_active IP Right Cessation
- 2006-05-11 EP EP06759639A patent/EP2016595A4/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| CA2650516A1 (en) | 2007-11-22 |
| EP2016595A4 (en) | 2011-08-03 |
| CA2650516C (en) | 2014-07-08 |
| CN101479814B (en) | 2013-03-13 |
| MX2008014201A (en) | 2008-12-01 |
| EP2016595A1 (en) | 2009-01-21 |
| WO2007133202A1 (en) | 2007-11-22 |
| BRPI0621663A2 (en) | 2011-12-20 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |