CN101894628A - Cable with high current-carrying capacity - Google Patents
Cable with high current-carrying capacity Download PDFInfo
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- CN101894628A CN101894628A CN 201010214635 CN201010214635A CN101894628A CN 101894628 A CN101894628 A CN 101894628A CN 201010214635 CN201010214635 CN 201010214635 CN 201010214635 A CN201010214635 A CN 201010214635A CN 101894628 A CN101894628 A CN 101894628A
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- cable
- carrying capacity
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- high current
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Abstract
The invention discloses a cable with high current-carrying capacity. The core of the cable is formed by twisting a plurality of enameled wires and the twisting gaps of the enameled wires are filled with fillers. An inner jacket, an armor layer and an outer jacket are arranged in turn outside the core. A single bare copper wire of a cable conductor is replaced by the enameled wires, the plurality of enameled wires are twisted into a large-section cable conductor core and other structures of the cable are not changed so that the aims of eliminating skin effect and improving the current-carrying capacity of the cable is fulfilled. Cables with cross sections of 120 mm<2> have very remarkable economic benefit.
Description
Technical field
The present invention relates to a kind of cable, specifically is a kind of cable with high current-carrying capacity.
Background technology
Cable is when the transmission alternating current, because eddy current loss, the size of current of cable transmission is not the ratio that the increases to increase along with the cross-section of cable, when the cross-section of cable is big, the CURRENT DISTRIBUTION of passing through of conductor inside is inhomogeneous, the centre of lead will can not pass live stream, and only have current delivery at the lead peripheral part.This current concentration is called kelvin effect in the phenomenon of the outer skin position of lead conduction.Owing to the kelvin effect phenomenon, reduced the ampacity of cable widely, generally speaking 1mm
2The ampacity of conductor be about 9A, but along with the change of sectional area is big, ampacity is not to calculate at double according to 9A, for example in the 1kV cable, 25mm
2The aerial ampacity of copper conductor is 140A, calculates back 1mm
2The ampacity of conductor is 5.6A; 500mm
2The aerial ampacity of copper conductor is 870A, calculates back 1mm
2Ampacity only be 1.74A.As seen Chuan Shu efficient has reduced very many.Improving the cable of ampacity develops with regard to being based on this technical barrier.
Summary of the invention
Technical problem to be solved by this invention provides a kind of cable with high current-carrying capacity, and this cable is worked as cross-sectional area of conductor and surpassed 300mm
2The time, can conduct than common cable and be twice above ampacity, improved the ampacity of electric cable with large cross-section greatly, significantly reduced the generation of kelvin effect, for 120mm
2Above cable has very significantly economic benefit.
For achieving the above object, cable with high current-carrying capacity provided by the invention comprises cable core, sets gradually inner sheath, armour and oversheath outside cable core, and described core forms by some enamelled wires are stranded, fills filler in the stranded gap of enamelled wire.
Above-mentioned enamelled wire comprises conductor and is extruded in the outer insulating barrier of core.The stranded form of enamelled wire comprises the circle of not pressing or pressing, fan-shaped or watt shape.Enamelled wire preferably adopts polyimide enameled wire.
Beneficial effect of the present invention:
1, by using enamelled wire to replace the single core of naked copper single line, realizes reducing the kelvin effect in the electric power transfer, reach the purpose that improves current-carrying capacity of cable as the power cable stranded conductor.
2, the stranded enamelled wire form of this cable conductor comprises and does not press and press conductor structures such as circle, fan-shaped, watt shape, and other structures of cable are identical with common cable.When structure is pressed in the cable conductor employing, in order to prevent the breakage of enameled wire coat, only use during production and press wheel technology, do not use Compact Conical Die technology.Guarantee the smooth of pressing mold simultaneously, prevent the uneven and impurity of damage paint film.
3, this invention mainly is used in VV, YJV series cable, and groundwork voltage 0.6/1kV is for 120mm
2Above cross section has the effect of good raising ampacity.
Description of drawings
Fig. 1 is a structure chart of the present invention.
Among the figure: 1. conductor, 2. insulating barrier, 3. filler, 4. inner sheath, 5. armour, 6. oversheath.
Embodiment
As shown in Figure 1, cable with high current-carrying capacity of the present invention comprises by the stranded cable core that forms of enamelled wire, fills filler 3 in the stranded gap of enamelled wire, set gradually inner sheath 4, armour 5 and oversheath 6 outside cable core, described enamelled wire comprises conductor 1 and is extruded in the outer insulating barrier 2 of core.
Production technology of the present invention:
1, according to 0.6/1kV, VV, the line diameter of the standard-required conductor of YJV series cable is selected to replace the naked copper single line with the polyimide enameled wire of external diameter, carries out stranded.
2, in the process of producing by the improvement of technology, take certain safeguard procedures, cause the phenomenon of paint film breakage in preventing to produce.
3, stranded good cable core extrudes polyvinyl chloride or crosslinked polyetylene insulated, then by stranding, and armouring, the squeeze jacket operation is made finished cable.
4, when when test or cabling,, remove the paint film on the conductor, can carry out cable testing easily and cable joint when laying by the paint film etchant solution.
Operation principle of the present invention:
The principle that the present invention produces by the further investigation kelvin effect, through thinking and test repeatedly, trial is resolved into the conductor of small bore one by one with heavy in section cable when the transmission current, resembles the independent conduction current of a plurality of parallel lines, to reduce the influence of kelvin effect.The naked copper single line that uses when for this reason using enamelled wire to replace cable conductor stranded, inner each the single copper cash of conductor that makes cable is owing to paint film is separated from each other, independently conduction current has reduced the influence of kelvin effect greatly, has reached the purpose that improves current-carrying capacity of cable.
By a large amount of tests, selected for use the polyimide enameled wire of temperature resistant grade 155 ℃ to do the single conductor of electric cable with large cross-section at last, this enamelled wire temperature resistant grade height, paint film has reasonable intensity and tack, paint film is unsuitable damaged during production, is used for the cable conductor core and is not easy to have reasonable durable operating characteristic owing to the conductor heating burns out paint film, even indivedual local breakages also can be played the effect that prevents kelvin effect, can improve the transmission current of cable widely.400mm for example
2Copper conductor, use the enamelled wire of 60 Φ 3.0mm, the electric current that every enamelled wire passes through is 55A, 60 can be passed through 3300A, consider the factor of heat radiation and the influence of internal electric field, multiply by 0.5 coefficient of safety, also can transmit 1650A.And present actual 400mm
2The ampacity of copper conductor have only 800A.As seen the ampacity of cable is doubled.
Claims (4)
1. a cable with high current-carrying capacity comprises cable core, sets gradually inner sheath (4), armour (5) and oversheath (6) outside cable core, it is characterized in that described core forms by some enamelled wires are stranded, fills filler (3) in the stranded gap of enamelled wire.
2. cable with high current-carrying capacity according to claim 1 is characterized in that described enamelled wire comprises conductor (1) and is extruded in the outer insulating barrier (2) of core.
3. cable with high current-carrying capacity according to claim 1 and 2 is characterized in that the stranded form of described enamelled wire comprises the circle of not pressing or pressing, fan-shaped or watt shape.
4. cable with high current-carrying capacity according to claim 1 and 2 is characterized in that described enamelled wire adopts polyimide enameled wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010214635 CN101894628A (en) | 2010-06-30 | 2010-06-30 | Cable with high current-carrying capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010214635 CN101894628A (en) | 2010-06-30 | 2010-06-30 | Cable with high current-carrying capacity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101894628A true CN101894628A (en) | 2010-11-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010214635 Pending CN101894628A (en) | 2010-06-30 | 2010-06-30 | Cable with high current-carrying capacity |
Country Status (1)
| Country | Link |
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| CN (1) | CN101894628A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280193A (en) * | 2011-08-16 | 2011-12-14 | 安徽滨江电缆股份有限公司 | Cable with high current-carrying capacity |
| CN102800400A (en) * | 2012-06-12 | 2012-11-28 | 江苏中煤电缆股份有限公司 | Power cable provided with enamelled copper wire cores and used for ship |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2674605Y (en) * | 2003-12-06 | 2005-01-26 | 江苏上上电缆集团有限公司 | 1000 V and below non-halogen low-smoke low-toxic flame-resistant cable for ship |
| CN2674608Y (en) * | 2003-10-31 | 2005-01-26 | 江苏上上电缆集团有限公司 | Medium-and high-voltage wire armoured power cable capable of preventing white ant |
| CN201126729Y (en) * | 2007-12-06 | 2008-10-01 | 扬州市红旗电缆制造有限公司 | Deep well synthetic detective cable |
| CN201383364Y (en) * | 2009-04-24 | 2010-01-13 | 薛守荣 | Corona-proof and high-temperature resistant frequency conversion soft cable |
| CN201749719U (en) * | 2010-06-30 | 2011-02-16 | 江苏东旭电缆有限公司 | High-current-carrying capacity cable |
-
2010
- 2010-06-30 CN CN 201010214635 patent/CN101894628A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2674608Y (en) * | 2003-10-31 | 2005-01-26 | 江苏上上电缆集团有限公司 | Medium-and high-voltage wire armoured power cable capable of preventing white ant |
| CN2674605Y (en) * | 2003-12-06 | 2005-01-26 | 江苏上上电缆集团有限公司 | 1000 V and below non-halogen low-smoke low-toxic flame-resistant cable for ship |
| CN201126729Y (en) * | 2007-12-06 | 2008-10-01 | 扬州市红旗电缆制造有限公司 | Deep well synthetic detective cable |
| CN201383364Y (en) * | 2009-04-24 | 2010-01-13 | 薛守荣 | Corona-proof and high-temperature resistant frequency conversion soft cable |
| CN201749719U (en) * | 2010-06-30 | 2011-02-16 | 江苏东旭电缆有限公司 | High-current-carrying capacity cable |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280193A (en) * | 2011-08-16 | 2011-12-14 | 安徽滨江电缆股份有限公司 | Cable with high current-carrying capacity |
| CN102280193B (en) * | 2011-08-16 | 2013-09-11 | 安徽滨江电缆股份有限公司 | Cable with high current-carrying capacity |
| CN102800400A (en) * | 2012-06-12 | 2012-11-28 | 江苏中煤电缆股份有限公司 | Power cable provided with enamelled copper wire cores and used for ship |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20101124 |