CN101479814B - Integrated outdoor termination for a high voltage cable - Google Patents
Integrated outdoor termination for a high voltage cable Download PDFInfo
- Publication number
- CN101479814B CN101479814B CN200680054557.7A CN200680054557A CN101479814B CN 101479814 B CN101479814 B CN 101479814B CN 200680054557 A CN200680054557 A CN 200680054557A CN 101479814 B CN101479814 B CN 101479814B
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- China
- Prior art keywords
- terminals
- tension cable
- terminal
- piece
- cable according
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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 is caused 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 subject to electric and impact 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. two insulation assemblies 202,204 and stress cones 208, the first insulation assembly 202 comprises that high-tension cable enters into terminals 200 by the first terminal 212 for the first terminal 212 that terminals 200 is connected to the high-tension cable (not shown).The part of the cable that is held by the first insulation assembly 202 is shelled backward to insulation position, and is connected to the first terminal 212 by connector.Stress cone 208 comprises for the second terminal 214 that earth cable is connected to the ground connection (not shown), the second terminal 214 comprises suction casing and clip, earth cable enters in the terminals 200 by suction casing, and clip is connected to the 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 the second insulation assembly 204 is connected to stress cone 208.Before use prefabricated and assembling of outdoor termination 200.
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 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 impact 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, lacking full skirt also causes junction point and the junction point between insulation assembly 202,204 between insulation assembly 204 and stress cone 208 that current leakage is arranged.
Summary of the invention
Disclose a kind of integrated outdoor termination, described integrated outdoor termination is by being integrated into the impact that the single-piece insulator reduces environment and electric stress with first, second portion and a plurality of full skirt.Described first, described second portion and described full skirt can be molded together, and become single-piece, so that described insulator does not comprise the cross section seam.Described first comprises the first integrated connector, described the first integrated connector is used for described outdoor termination is connected to high-tension cable, described second portion is with continuous for the second terminal that is connected ground connection, described the 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 substantially conical shape, and described first just is transitioned 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.
In a word, the invention provides a kind of single-piece terminals for high-tension cable, comprising:
First, described first comprises integrated the first terminal, wherein said the first terminal is configured to admit described high-tension cable by the hole; And
Second portion, wherein said terminals comprise a plurality of full skirts, and described first, described second portion and described full skirt are molded together and become single-piece.
The present invention also provides a kind of method that is used for making for the terminals of high-tension cable, and described method comprises:
The molded single-piece insulator that is formed by first, second portion and a plurality of full skirt, described second portion is used as the stress cone that is configured to grounding connection, the longitudinal axis ground that described a plurality of full skirt is approximately perpendicular to described first and described second portion extends, and described a plurality of full skirt separates equably along the described longitudinal axis of described first and described second portion;
Molded described first is to include integrated the first terminal, and wherein said the first terminal is configured to admit described high-tension cable by the hole; And
Molded described second portion to be linking to each other with the second terminal that is used for being connected ground connection, and wherein said the second terminal construction is for by described hole admittance earth cable.
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 for illustrating 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 (each " integrated outdoor termination ") that are used for high-tension cable are provided, and it is fit to outdoor use.Integrated outdoor termination comprises single-piece, the single-piece elimination seam between the different separate parts and discontinuous, therefore, outdoor termination has reduced the impact of environment and electric stress.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 the 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 substantially conical shape.Be transitioned into place the stress cone 114 at insulator 110 from first 116, stress cone 114 comprises and the diameter of section of first diameter of section about equally and that increase along the direction of the 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 first 116 and the second terminal 104, then can reduce along the direction of the second terminal 104.Yet in any position, the diameter of section of stress cone 114 is general all greater than the diameter of section of first 116.
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 the 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 the second terminal 304 are linked to be integral body, so that the transition between their outer surface is substantially level and smooth not coaxial seam or discontinuous roughly.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, so that they can distribute along outer surface 320, and are approximately perpendicular to the longitudinal axis 378 of terminals 300, 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 usually experience maximum electric field intensity, 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 for higher electric pressure, for example 220KV and 500KV, or scaled for such as the application under the lower voltage of 69KV.The total length of integrated outdoor termination 300 comprises the first connector 302 and the second connector 304, is approximately 1400mm.The diameter of the first terminal approximately is 86mm, distance the first full skirt on from the end of the second connector 304 (only showing a part) to stress cone 314 approximately is 141mm, and the widest 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 the second connector 304 substantially, so that the second connector 304 is pointed in end 311, end 311 has the radius of about 2.5mm.Full skirt 312 comprises substantially recessed part 321, and the about 12mm of the radius of substantially recessed 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 equally about 48mm 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 (12)
1. single-piece terminals that are used for high-tension cable comprise:
First, described first comprises integrated the first terminal, wherein said the first terminal is configured to admit and directly contact described high-tension cable by the hole; And
Second portion, wherein said terminals comprise a plurality of full skirts, and described first, described second portion and described full skirt are molded together and become single-piece.
2. the single-piece terminals for high-tension cable according to claim 1 also comprise the second terminal that is formed in the described second portion, and wherein, described the second terminal construction is for admitting earth cable by described hole.
3. single-piece terminals for high-tension cable according to claim 1, wherein, described a plurality of full skirts and described first and described second portion integral body form the part of molded single-piece insulator.
4. single-piece terminals for high-tension cable according to claim 3, wherein, the longitudinal axis ground that described a plurality of full skirt is approximately perpendicular to described first and described second portion extends, and described a plurality of full skirt roughly separates equably along the described longitudinal axis of described first and described second portion.
5. single-piece terminals for high-tension cable according to claim 1, wherein, described first has the shape of substantial cylindrical, and described second portion has the shape with the conical shaped of smaller end and larger end, and an end of wherein said first and the described smaller end of described second portion integrally form, and the described smaller end of described second portion forms gradually transition towards the described larger end of described second portion on sectional area.
6. single-piece terminals for high-tension cable according to claim 1, wherein molded single-piece insulator is formed by silicones.
7. single-piece terminals for high-tension cable according to claim 1, wherein, described terminals can support to carry at least high-tension cable of the voltage of 69kV.
8. method that is used for making for the terminals of high-tension cable, described method comprises:
The molded single-piece insulator that is formed by first, second portion and a plurality of full skirt, described second portion is used as the stress cone that is configured to grounding connection, the longitudinal axis ground that described a plurality of full skirt is approximately perpendicular to described first and described second portion extends, and described a plurality of full skirt separates equably along the described longitudinal axis of described first and described second portion;
Molded described first is to include integrated the first terminal, and wherein said the first terminal is configured to admit and directly contact described high-tension cable by the hole; And
Molded described second portion to be linking to each other with the second terminal that is used for being connected ground connection, and wherein said the second terminal construction is for by described hole admittance earth cable.
9. the method that is used for making for the terminals of high-tension cable according to claim 8, wherein, described first has the shape of substantial cylindrical, and described second portion has the shape with the conical shaped of smaller end and larger end, and an end of wherein said first and the described smaller end of described second portion integrally form, and the described smaller end of described second portion forms gradually transition towards the described larger end of described second portion on sectional area.
10. the method that is used for making for the terminals of high-tension cable according to claim 8, wherein said single-piece insulator is formed by silicones.
11. the method that is used for making for the terminals of high-tension cable according to claim 8, wherein, described terminals are made before installation.
12. the method that is used for making for the terminals of high-tension cable according to claim 8, wherein, described terminals can support to carry at least high-tension cable of the voltage of 69kV.
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 CN101479814A (en) | 2009-07-08 |
| CN101479814B true 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 |
|---|---|---|---|---|
| US8901430B2 (en) | 2007-08-08 | 2014-12-02 | G&W Electric Company | Cable termination for high-voltage cable application |
| WO2016026538A1 (en) | 2014-08-22 | 2016-02-25 | Abb Technology Ltd | Electric field control device for high power cable and method for manufacturing thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1209701A2 (en) * | 2000-11-21 | 2002-05-29 | The Furukawa Electric Co., Ltd. | Organic composite insulator and method of producing the same |
Family Cites Families (4)
| 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 |
-
2006
- 2006-05-11 MX MX2008014201A patent/MX2008014201A/en active IP Right Grant
- 2006-05-11 CN CN200680054557.7A patent/CN101479814B/en active Active
- 2006-05-11 CA CA2650516A patent/CA2650516C/en active Active
- 2006-05-11 EP EP06759639A patent/EP2016595A4/en not_active Withdrawn
- 2006-05-11 WO PCT/US2006/018367 patent/WO2007133202A1/en active Application Filing
- 2006-05-11 BR BRPI0621663-3A patent/BRPI0621663A2/en not_active IP Right Cessation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1209701A2 (en) * | 2000-11-21 | 2002-05-29 | The Furukawa Electric Co., Ltd. | Organic composite insulator and method of producing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2016595A1 (en) | 2009-01-21 |
| WO2007133202A1 (en) | 2007-11-22 |
| CA2650516A1 (en) | 2007-11-22 |
| MX2008014201A (en) | 2008-12-01 |
| BRPI0621663A2 (en) | 2011-12-20 |
| CN101479814A (en) | 2009-07-08 |
| CA2650516C (en) | 2014-07-08 |
| EP2016595A4 (en) | 2011-08-03 |
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| 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 |