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Medium-voltage variable frequency power cable

A power cable, medium voltage technology, applied in power cables, power cables with shielding/conducting layers, insulated cables, etc., can solve the problems of low insulation safety factor and easy to be broken down, and improve the anti-interference performance, improved insulation performance, and the effect of small emission of high-order harmonics

Inactive Publication Date: 2017-06-16
湖北龙腾红旗电缆(集团)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a medium-voltage variable frequency power cable, which can solve the problem of low safety factor of cable insulation and is easy to be broken down. Good performance, suitable for various laying environments

Method used

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  • Medium-voltage variable frequency power cable
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Embodiment Construction

[0021] Such as figure 1 As shown, a medium-voltage variable frequency power cable includes a cable core, and the outside of the cable core is provided with an inner lining layer 6, a total shielding layer 7, and a low-smoke and halogen-free outer sheath layer 8 in sequence from the inside to the outside;

[0022] The cable core is formed by three insulated wire cores symmetrically cabled;

[0023] The insulated wire core is composed of conductor layer 1, conductor shielding layer 2, cross-linked polyethylene insulating layer 3, insulating shielding layer 4 and phase-separated shielding layer 5 from inside to outside. The thickness of cross-linked polyethylene insulating layer 3 is 5.0- 5.5 mm;

[0024] The phase-separated shielding layer 5 and the total shielding layer 7 are copper wires loosely wound and copper tape wrapped around the cladding, and the wrapping directions of the copper wire and the copper tape are opposite.

[0025] The insulating shielding layer 4 is a pee...

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Abstract

A medium-voltage variable-frequency power cable, including a cable core, which is sequentially covered with an inner liner, a total shielding layer, and a low-smoke and halogen-free outer sheath layer from the inside to the outside; the cable core is symmetrically formed by three insulated wire cores. Formation; the insulated wire core is composed of a conductor layer, a conductor shielding layer, a cross-linked polyethylene insulating layer, an insulating shielding layer and a phase-separated shielding layer from the inside to the outside, and the thickness of the cross-linked polyethylene insulating layer is 5.0-5.5 mm; The phase shielding layer and the total shielding layer are copper wires loosely wound and copper tape wrapped, and the winding directions of copper wire and copper tape are opposite. The medium-voltage variable-frequency power cable provided by the invention solves the problem of high-power transmission of medium-voltage frequency converters. It solves the problem of low insulation safety factor and easy breakdown for cables. It has good insulation performance and can cope with the impact of high-frequency pulse reflection superimposed voltage. It has good anti-interference performance and is suitable for various laying environments.

Description

technical field [0001] The invention relates to a cable, in particular to a medium-voltage variable-frequency power cable used for a variable-frequency speed regulating device. Background technique [0002] In recent years, frequency conversion speed control devices have become the central equipment of electric power transmission by virtue of their remarkable advantages of energy saving, labor saving and easy automatic control, which has promoted the frequency conversion speed control technology to penetrate more and more widely into all walks of life. [0003] With the rapid development of modern power electronics technology and microelectronics technology, high-voltage and high-power frequency conversion speed control devices continue to mature. The high-voltage problem that has been difficult to solve has been well solved in recent years by connecting devices or units in series. At present, there are no less than 200 low-voltage inverter manufacturers in China, most of wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B9/02H01B7/02
CPCH01B9/02H01B7/0216H01B9/021
Inventor 胡涛赵云卫建良管永生王雪
Owner 湖北龙腾红旗电缆(集团)有限公司
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