7 split conductor with cable copper core section of 3500mm<2> and manufacturing method thereof

A technology for dividing conductors and cross-sections is used in medium and high voltage fire-resistant cables, cable copper core cross-sections, 7-split conductors and their preparation processes, and special medium and high voltage fire-resistant cables. Effect

Active Publication Date: 2012-02-08
SICHUAN MINGXING CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention overcomes the problem of poor use effect in the use occasions with high ambient temperature, realizes the enlargement of cable cross section, makes the cable copper core cross section reach 3500mm2, and adopts the form of split conductor at the same time, so that the copper The structure of the large cross-section conductor is more dispersed, which effectively reduces the loss and heat generation of the conductor, reduces the influence of the "skin effect" on the current transmission of the cable, increases the carrying capacity of the conductor, and thus improves the practicability of the cable

Method used

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  • 7 split conductor with cable copper core section of 3500mm&lt;2&gt; and manufacturing method thereof
  • 7 split conductor with cable copper core section of 3500mm&lt;2&gt; and manufacturing method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0030] A cable copper core section 3500mm 2 The 7-split conductor includes a conductor composed of six split strands 1 of the same cross-section and a central stranding unit 2, and a corrugated insulating paper 3 is arranged between the six split strands 1 and the central stranding unit 2 The split strands 1 are combined and twisted leftward around the central twisting unit 2 to form a cable, and the outer circumference of the conductor is wrapped with a semi-conductive nylon tape 4 in turn.

[0031] In the present invention, the section of the central stranding unit 2 is 110mm 2 , the section of split strand 1 is 560 mm 2 ; The radian of the split strand 1 is 50 degrees; the section of the split strand 1 is fan-shaped.

[0032] When the present invention is in use, 91 disks and 630 frame stranding machine equipment are used to twist the central stranding unit 2 with copper monofilament; through the frame stranding equipment, the pre-screw pressing wheel is used to strand a ...

Embodiment 2

[0036] A cable copper core section 3500mm 2 The 7-split conductor includes a conductor composed of six split strands 1 of the same cross-section and a central stranding unit 2, and a corrugated insulating paper 3 is arranged between the six split strands 1 and the central stranding unit 2 The split strands 1 are combined and twisted leftward around the central twisting unit 2 to form a cable, and the outer circumference of the conductor is wrapped with a semi-conductive nylon tape 4 in turn.

[0037] In the present invention, the section of the central stranding unit 2 is 115mm 2, the section of split strand 1 is 565 mm 2 ; The radian of the split strand block 1 is 60 degrees; the section of the split strand block 1 is fan-shaped.

[0038] When the present invention is in use, the central stranding unit 2 conductor pay-off reels are placed on the 1600mm rotating pay-off frame, and the six fan-shaped segmented block 1 conductor pay-off reels are placed on the 2240mm rotary pa...

Embodiment 3

[0040] A cable copper core section 3500mm 2 The 7-split conductor includes a conductor composed of six split strands 1 of the same cross-section and a central stranding unit 2, and a corrugated insulating paper 3 is arranged between the six split strands 1 and the central stranding unit 2 The split strands 1 are combined and twisted leftward around the central twisting unit 2 to form a cable, and the outer circumference of the conductor is wrapped with a semi-conductive nylon tape 4 in turn.

[0041] In the present invention, the section of the central stranding unit 2 is 120mm 2 , the section of split strand 1 is 570 mm 2 ; The radian of the split strand block 1 is 70 degrees; the section of the split strand block 1 is fan-shaped.

[0042] When the present invention is in use, the central stranding unit 2 conductor pay-off reels are placed on the 1650mm rotating pay-off frame, and the six fan-shaped segmented block 1 conductor pay-off reels are placed on the 2280mm rotary p...

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Abstract

The invention discloses a 7 split conductor with a cable copper core section of 3500mm<2> and a manufacturing method thereof, and the conductor provided by the invention is used for transmitting high-capacity high-pressure energy, overcoming the problem that the use effect is bad in an higher temperature environment, increasing the cable section, and causing the cable copper core section to be 3500mm<2>. In addition, a conductor-splitting mode is adopted, so that the structure of a conductor with a large copper core section is more disperse, thus the heat losses of the conductor are reduced effectively, the influence of the 'skin effect' on current transmission of a cable is reduced, and the current-carrying capacity of the conductor is increased, thereby improving the practicability of the cable.

Description

Technical field: [0001] The invention relates to the field of electric power transmission, in particular to a cable with a copper core cross-section of 3500 mm for the transmission of large-capacity high-voltage electric energy 2 The 7-segmented conductor and its preparation process. Background technique: [0002] At present, in the cable conductor standards at home and abroad, the largest copper core stranded conductor specified in the national standard (GB3956) is 2000 mm 2 , the maximum copper core stranded conductor specified in the IEC standard (IEC60228) is 2500 mm 2 . With the sustained and rapid development of my country's national economy and the continuous improvement of people's living standards, the demand for electricity in various industries is increasing, and the demand for electricity has increased sharply. Power facilities are developing in the direction of large-capacity (high voltage, high current) transmission. Therefore, it has become a consensus in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/30H01B7/02H01B5/08H01B9/00H01B13/02H01B13/12
Inventor 江巍李广元沈卢东
Owner SICHUAN MINGXING CABLE
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