WO2006114008A1 - Conductor connection for high-voltage power cables - Google Patents
Conductor connection for high-voltage power cables Download PDFInfo
- Publication number
- WO2006114008A1 WO2006114008A1 PCT/CH2006/000197 CH2006000197W WO2006114008A1 WO 2006114008 A1 WO2006114008 A1 WO 2006114008A1 CH 2006000197 W CH2006000197 W CH 2006000197W WO 2006114008 A1 WO2006114008 A1 WO 2006114008A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- screw
- conductor connection
- screw connector
- segments
- screws
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
- H01R4/36—Conductive members located under tip of screw
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/53—Bases or cases for heavy duty; Bases or cases for high voltage with means for preventing corona or arcing
Definitions
- the invention relates to a conductor connection for electrical high-voltage power cable with a hollow cylindrical, electrically conductive screw, which has radial threaded holes for also electrically conductive contact screws, which are introduced at both ends with game, stripped cable conductors of the high-voltage power cable can be pressed.
- Insulated high-voltage electric power cables are used in particular in the range of 45 to 500 kV, which places the highest demands in terms of insulation.
- the cable sheath consists, for example, of cross-linked polyethylene (XLPE), high-density polyethylene (HDPE) or ethylene-propylene rubber (EPR), which also have advantageous mechanical and chemical properties and offer protection against abrasion and corrosion.
- XLPE cross-linked polyethylene
- HDPE high-density polyethylene
- EPR ethylene-propylene rubber
- the cable conductor of high-voltage power cables consists of individual wires of, for example, 1 to 3 mm in diameter, usually made of copper or aluminum.
- the stranded single wires forming a compact conductor have a single core up to a total cross section of about 800 mm 2 , and when the total cross sections increase to 1000 to 2000 mm 2 or more, four to six segments are usually formed with a central core , The individual core and the segments are usually wrapped with a semiconductor strip.
- the electrical cable conductor as a whole is initially covered by an inner semiconductor layer, followed by an insulating layer and an outer semiconductive layer. All three layers are expediently applied by an extrusion process and crosslinked in the same production line at high temperature and high pressure. Embedding tapes are wound over the outer semiconductive layer, which compensate for the thermal expansion of the insulation. Chen and form a sufficient adhesion between the outermost cable semiconductor and the metallic protective cover.
- three types of protective covers made of metal strips or metal-plastic composite strips are optionally used:
- High-voltage power cables are connected in practice by the metallic cable ladder welded together or connected by a compression sleeve or screw together.
- hollow cylindrical screw connectors are used with these radially extending through contact screws.
- the two stripped cable conductors of the high voltage power cables are inserted into the hollow cylindrical screw connector until they abut each other in the region of its longitudinal center, and then tightened the contact screws, which clamps the cable conductors, and the electric current is passed through the screw connector substantially.
- the inventor has set itself the task of creating a conductor connection of the type mentioned, which optimizes the assembly for connecting the high-voltage power cable in terms of time and cost.
- the object is achieved according to the invention that the screw is separated by cuts in the axial direction in at least two segments, which form adjustable abutment for the contact screws in the radial direction.
- Special and further embodiments of the screwed connector are the subject of dependent claims.
- the segments of the hollow cylindrical screw connector must form the abutment for the contact screws by means of suitable means.
- the number of segments of the screw connector formed in accordance with the invention is limited; two segments of equal size are advantageously formed by two sections lying in one plane of the longitudinal axis of the screw connector.
- An optimal solution is to adjustably connect the two segments with each other radially opposite pairs of connecting screws. This is preferred both in terms of labor and high stability and precision.
- hinges can also be formed on the one side and screw connections on the other side of the two segments.
- the two segments of the hollow cylindrical screw connector can have longitudinal flanges with screw holes.
- the protruding flanges make the connection bulky.
- the threaded bores of one segment of the screw connector for the contact screws are preferably formed diagonally opposite those of the other segment. Further, it is advantageous, viewed in the axial direction, these threaded bores form alternately offset from each other, preferably at an angle ⁇ of 30 to 60 °, in particular about 40 °.
- the threaded holes in the hollow cylindrical Screw also be arranged so that each contact screw or a multiple of each contact screw acts on a segment.
- the contact screws are preferably designed as torque screws with a predetermined breaking point. When a certain torque is applied, the screw head is sheared off, leaving only the screw shaft pushed into the cable ladder in the threaded hole. This shaft of the screw is preferably sunk in the threaded hole.
- a sealant can be filled into the exposed threaded hole. Further, the grooves between the segments of the screw connector must be sealed.
- the seal between screw connector and cable ladder is preferably done by attaching one O-ring each.
- Both the screw connector and the contact screws must on the one hand have high mechanical strength and, on the other hand, good electrical conductivity.
- the two cable ends are pressed together before screwing, for example with a few bar, the electrical current flow is mainly through the screw connector.
- This consists in particular of aluminum, copper or brass, the contact screws in particular copper.
- the contact area in the screw connector can be surrounded by an electrically conductive gel of a known chemical composition and constitution.
- the inventive solution has the obvious advantage that in contrast to the one-piece screw in a multi-part screw whose inner diameter can be precisely adapted to the diameter of the cable ladder, so that the conductor segments of the cable to be connected without slipping of individual segments placed in the screw and can be fixed.
- this positively influences an optimal placement of the contact screws, since they come to rest correctly on the cable, without it being possible for the individual conductor segments to slip in the cable conductor.
- the size of the screw connector ensures a better heat distribution, which results from the energy flow at the cable. This reduces the heat load on the sleeve body and the core insulation, there is no higher heating in the sleeve.
- FIG. 1 shows a partially cutaway view of a screw connector with inserted cable ladder
- FIG. 2 shows a cross-section A-A according to FIG. 1
- FIG. 3 shows a cross-section B-B according to FIG.
- Fig. 1 the core of a conductor connection 10 in a coupling sleeve, a screw 12 is shown.
- a stripped cable ladder 14 of two high-voltage electric power cables 16 is plugged in each time and pressed against one another in the longitudinal direction of the screw connector 12.
- the present screw connector is about 200 mm long, has an outer diameter of 100 mm and an inner diameter of about 50 mm, resulting in a wall thickness of about 25 mm.
- the cable conductor 14 of the electrical high-voltage power cable 16 is surrounded by an insulation 18, which in turn is surrounded by a semiconductor layer 20.
- the outer end of the high-voltage power cable 16, forms a cable sheath 22nd
- the hollow cylindrical, relatively thick-walled screw 12 is - as mentioned - .. slipped over the cable conductor 14 of the two high-voltage power cable 16.
- the screw connector 12 consists of two semi-circular in cross section segments 24, 26, of which only the upper segment 24 is visible. Both segments 24, 26 each have four radial threaded bores 28 (FIGS. 2, 3), into each of which a contact screw 30 with a hexagonal screw head 32 is provisionally still loosely engaged. Attracted, they serve to fix the cable ladder 14.
- Figures 2 and 3 show cross-sections through the threaded connector 12 with a cable conductor 14 divided into five segments and an inner core.
- the section according to FIG. 2 lies on the longitudinal axis of two connecting screws 38
- the section according to FIG. 3 lies on the longitudinal axis of two threaded bores 28 for a contact screw 30.
- These are designed as torque screws M 24 ⁇ 15 and have a predetermined breaking point 40 on. When a given torque is exceeded, the screw head shears internally.
- the bearing or pressure surface of the contact screws 30, which is pressed onto the cable conductor 14, is formed dome-shaped.
- the segment 26 of the hollow cylindrical screw connector 12 has screw holes 34 at regular intervals (FIG. 1), which lie opposite one another in pairs and have a step for the support of the screw head 36.
- the opposite segment has a blind-ending threaded bore 44 for the connecting screw 38.
- the connecting screws 38 are tightened until both segments 24, 26 sit well on the bare cable conductor 14.
- the segments 24, 26 are tensioned and form an abutment for the contact screws 30 in accordance with the setting of the connecting screws 38.
- the considered in the axial direction of the screw 12 displacement angle o of the threaded holes 28 for the contact screws 30 is presently about 40 °.
- An annular gap 46 between the cable conductor 14 and the inner surface of the sterverinders 12, can be filled with compressed air.
- the threaded holes 30 are sealed after shearing the screw heads 32 and the flat gaps 48 between the segments 24,26 with a sealing compound 50.
- O-rings are arranged, which seal the annular gap 46 frontally.
- an electrically conductive gel 52 may be arranged.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH741/05 | 2005-04-27 | ||
CH00741/05A CH697926B1 (en) | 2005-04-27 | 2005-04-27 | Conductor connection for high voltage electrical power cables. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006114008A1 true WO2006114008A1 (en) | 2006-11-02 |
Family
ID=34975008
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CH2006/000197 WO2006114008A1 (en) | 2005-04-27 | 2006-04-07 | Conductor connection for high-voltage power cables |
Country Status (5)
Country | Link |
---|---|
CN (1) | CN101189761A (en) |
CH (1) | CH697926B1 (en) |
TR (1) | TR200707333T1 (en) |
TW (1) | TW200644371A (en) |
WO (1) | WO2006114008A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009101068A1 (en) * | 2008-02-13 | 2009-08-20 | Abb Technology Ag | Cable connector |
CN102751593A (en) * | 2011-04-19 | 2012-10-24 | 深圳市宏商材料科技股份有限公司 | Conductor connector |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103683138A (en) * | 2013-04-22 | 2014-03-26 | 上海永固电力器材有限公司 | Bolt type aluminum connection tube |
CN103682697A (en) * | 2013-04-22 | 2014-03-26 | 上海永固电力器材有限公司 | Bolt type aluminum terminal |
CN104518292A (en) * | 2013-10-08 | 2015-04-15 | 泰科电子(上海)有限公司 | Connector for connecting two cables with each other |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3640959A1 (en) * | 1986-11-29 | 1988-06-09 | Bbc Brown Boveri & Cie | Cable clamp |
GB2272586A (en) * | 1992-10-29 | 1994-05-18 | Sicame Electrical Dev Ltd | Electrical cable core connector |
-
2005
- 2005-04-27 CH CH00741/05A patent/CH697926B1/en not_active IP Right Cessation
-
2006
- 2006-04-07 TR TR2007/07333T patent/TR200707333T1/en unknown
- 2006-04-07 WO PCT/CH2006/000197 patent/WO2006114008A1/en not_active Application Discontinuation
- 2006-04-07 CN CNA2006800142858A patent/CN101189761A/en active Pending
- 2006-04-20 TW TW095114035A patent/TW200644371A/en unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3640959A1 (en) * | 1986-11-29 | 1988-06-09 | Bbc Brown Boveri & Cie | Cable clamp |
GB2272586A (en) * | 1992-10-29 | 1994-05-18 | Sicame Electrical Dev Ltd | Electrical cable core connector |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009101068A1 (en) * | 2008-02-13 | 2009-08-20 | Abb Technology Ag | Cable connector |
CN102751593A (en) * | 2011-04-19 | 2012-10-24 | 深圳市宏商材料科技股份有限公司 | Conductor connector |
Also Published As
Publication number | Publication date |
---|---|
CH697926B1 (en) | 2009-03-31 |
TR200707333T1 (en) | 2008-04-21 |
TW200644371A (en) | 2006-12-16 |
CN101189761A (en) | 2008-05-28 |
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