WO2020094004A1 - Câble d'énergie éolienne basse tension - Google Patents

Câble d'énergie éolienne basse tension Download PDF

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Publication number
WO2020094004A1
WO2020094004A1 PCT/CN2019/115706 CN2019115706W WO2020094004A1 WO 2020094004 A1 WO2020094004 A1 WO 2020094004A1 CN 2019115706 W CN2019115706 W CN 2019115706W WO 2020094004 A1 WO2020094004 A1 WO 2020094004A1
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WO
WIPO (PCT)
Prior art keywords
low
conductor
wind energy
cable
copper wire
Prior art date
Application number
PCT/CN2019/115706
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English (en)
Chinese (zh)
Inventor
马振清
曹西伟
宋文娜
万育萍
Original Assignee
江苏亨通电力电缆有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Publication of WO2020094004A1 publication Critical patent/WO2020094004A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
    • H01B5/08—Several wires or the like stranded in the form of a rope
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables

Definitions

  • This application relates to the technical field of cables, in particular, to a low-voltage wind energy cable.
  • the flame retardant properties of the insulation materials and outer sheath materials commonly used in domestic conventional American standard torsion-type low-voltage wind energy rubber sheathed flexible cables can only pass the flame retardant CT test specified in UL 1685; and the tensile strength of the insulation materials used Low strength (4.2Mpa) and poor flame retardant performance; outer sheath oil resistance index (100 °C, 24h, tensile strength and elongation rate of change ⁇ 40%) is low; flame retardant, high mechanical properties , Cold resistance and oil resistance are not satisfied at the same time.
  • the purpose of this application is to provide a low-voltage wind energy cable to improve the problem of poor flame retardancy and softness of existing low-voltage wind energy cables.
  • the present application provides a low-voltage wind energy cable, including a conductor, an isolation tape, an insulation layer and an outer sheath, the isolation tape is wrapped around the outside of the conductor, and the insulation layer is wrapped around the outside of the isolation tape
  • the material of the insulating layer is ethylene-propylene rubber, and the outer sheath is wrapped outside the insulating layer.
  • the cable insulation layer material is ethylene-propylene rubber.
  • This ethylene-propylene rubber insulation material not only enables the cable product to pass the flame retardant FT4 test in UL1685, but also the flame-retardant high-strength ethylene-propylene insulation rubber material has a tensile strength exceeding Double the ordinary ethylene-propylene rubber insulation material, the flame retardant performance and electrical safety performance of the low-voltage wind energy cable are improved, and the cable with this structural design has a wide range of applications, with comprehensive advantages such as power transmission and high mechanical strength, and the cable Production can be produced only through the factory's existing production equipment.
  • the conductor includes a plurality of strands, the strands are twisted to form the conductor, and each strand of the strand includes a plurality of copper wires, the plurality of copper wires are stranded to form each strand Tow.
  • the conductor includes a multi-strand tow, the tow includes a plurality of copper wires, and the tow is formed by twisting a plurality of copper wires.
  • the plurality of copper wires are twisted along a first circumferential direction to form the tow, the multiple strands are twisted along a second circumferential direction to form the conductor, and the first circumferential direction is connected to the first
  • the two circumferential directions are opposite.
  • the conductor includes multiple strands, and the conductor is formed by stranding multiple strands, the strand includes multiple copper wires, and the strand is formed by stranding multiple copper wires.
  • the selection of wires can make the low-voltage wind energy cable have better flexibility.
  • the tow includes a first copper wire layer, a second copper wire layer, and a third copper wire layer arranged in order from inside to outside, and the outer diameter of the copper wire in the second copper wire layer is less than The outer diameter of the copper wire in the second copper wire layer and the outer diameter of the copper wire in the third copper wire layer.
  • the second copper wire layer can fill a part of the gap between the third copper wire layer and the first copper wire layer, making the tow structure more compact and reducing the possibility of partial discharge.
  • the ratio of the outer diameter of the copper wire to the pitch length of the tow is 1: 8.
  • limiting the ratio of the outer diameter of the copper wire to the pitch length of the tow to 1: 8 can make the tow not only have better flexibility, but also ensure a compact structure of the tow.
  • the ratio of the outer diameter of the tow to the pitch length of the conductor is 1: 8.
  • limiting the ratio of the outer diameter of the tow to the pitch length of the conductor to 1: 8 enables the conductor to have better flexibility and also ensure a compact structure of the conductor.
  • the diameter of the copper wire is 0.45 mm to 0.55 mm.
  • the flexibility of the conductor is ensured by limiting the diameter of the copper wire to a relatively small range.
  • the diameter of the conductor is 1.5mm-37.4mm.
  • the diameter of the limited conductor is within a reasonable range, while ensuring the flexibility and power transmission performance of the cable, the number of copper wires per tow can be reasonably adjusted.
  • the outer sheath material is chlorinated polyethylene rubber.
  • the chlorinated polyethylene rubber material selected for the outer sheath has better flame retardancy, oil resistance, low temperature resistance and ultraviolet resistance than ordinary chlorinated polyethylene rubber materials.
  • the insulating layer and the outer sheath are coated on the outside of the conductor by double-layer co-extrusion.
  • the double-layer simultaneous sequential extrusion method can avoid problems such as contamination and damage to the inner insulating surface when the two extrusions are separated, and the two adjacent layers of insulation are closely combined to improve Cable quality.
  • This application provides a low-voltage wind energy cable, including conductor, isolation tape, insulation layer and outer sheath;
  • the cable insulation layer material is ethylene-propylene rubber, this ethylene-propylene rubber insulation material can not only make the finished cable pass UL1685 flame retardant FT4 test ,
  • the tensile strength of this flame-retardant high-strength ethylene-propylene insulation rubber material is more than twice that of ordinary ethylene-propylene rubber insulation materials, so that the flame retardant performance and electrical safety performance of the low-voltage wind energy cable are improved, and the cable of this structural design is suitable for It has a wide range, has comprehensive advantages such as power transmission and high mechanical strength, and the cable can realize the production of the low-voltage wind energy cable without adding new production equipment, saving the production cost.
  • Example 1 is a schematic structural diagram of a low-voltage wind energy cable provided in Example 1 of this application;
  • FIG. 2 is a schematic diagram of the structure of the tow shown in FIG. 1;
  • Example 3 is a schematic structural diagram of a low-voltage energy distribution cable provided in Example 2 of the present application.
  • FIG. 4 is a schematic structural view of the tow shown in FIG. 3;
  • Icon 100-low-voltage wind energy cable; 10-conductor; 11-tow; 111-first copper conductor layer; 112-second copper conductor layer; 113-third copper conductor layer; 12-copper conductor; 20-isolation tape ; 30- insulating layer; 40- outer sheath; A- first circumferential direction; B- second circumferential direction.
  • the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is conventionally placed when the application product is used, or this
  • the orientation or positional relationship commonly understood by those skilled in the art, or the orientation or positional relationship that is usually placed when the product of this application is used is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must It has a specific orientation and is constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present application.
  • the terms “first”, “second”, “third”, etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
  • FIG. 1 is a low-voltage wind energy cable 100 provided by this embodiment.
  • the low-voltage wind energy cable 100 in this embodiment includes a conductor 10, an isolation tape 20, an insulating layer 30, and an outer jacket 40; wherein, the isolation tape 20 is wrapped around the outer side of the conductor 10, and the insulating layer 30 is wrapped Outside the isolation tape 20, the outer sheath 40 covers the outside of the insulating layer 30.
  • the conductor 10 uses a soft copper wire 12 with a diameter ranging from 0.45 mm to 0.55 mm as the basic constituent unit.
  • the outer diameter of the soft copper wire 12 forming the tow 11 is the same.
  • the number of soft copper wires 12 included in the tow 11 is also the same, that is, the outer diameter of each tow 11 is the same.
  • the conductor 10 is formed by twisting twice, that is, a plurality of soft copper wires 12 are stranded along the first circumferential direction A to form a tow 11, and a plurality of copper wires 12 are stranded to form a tow 11
  • the process is the first stranding
  • FIG. 2 is a schematic structural view of the tow 11 shown in FIG. 1; the multi-strand tow 11 is twisted along the second circumferential direction B to form the conductor 10, and the multi-strand tow 11 is stranded to form the conductor 10 This process is the second twisting.
  • the first circumferential direction A is opposite to the second circumferential direction B, that is, the first circumferential direction A is counterclockwise and the second circumferential direction B is forward
  • the diameter of the conductor 10 finally formed ranges from 1.5 mm to 37.4 mm.
  • the conductor 10 can also be formed in other ways, and does not affect the flexibility and power transmission performance of the conductor 10, for example, the two twists are in the same circumferential direction, that is, the two twists are in the clockwise direction Or twist it counterclockwise.
  • the so-called pitch diameter ratio is any single wire of each layer in the stranded wire, which is spirally wound around a center line according to a certain twisting angle. Twisted, a complete spiral pitch in the direction of the twisted wire axis is the pitch length, where the ratio of the pitch length to the outer diameter of the twisted wire is the pitch diameter ratio, and the size of the pitch diameter ratio is related to the tightness of the twisted wire.
  • the degree, the weight of the stranded wire and the size of the resistance of the stranded wire are all specified in the product standard of the wire for the ratio of the pitch diameter.
  • the pitch ratio of the first stranding and the second stranding is 1: 8, that is, in the first stranding, each soft layer in each layer of the tow 11
  • the copper wires 12 are all twisted around a center line according to a certain twisting angle, and the ratio of the pitch of a completed spiral in the first circumferential direction A to the outer diameter of the tow 11 is 1: 8;
  • each strand 11 in each layer of the conductor 10 is twisted in a spiral shape around a central strand 11 according to a certain twisting angle, in the second circumferential direction B
  • the ratio of the pitch of a completed spiral to the outer diameter of the conductor 10 is 1: 8.
  • the pitch ratio of the two strands is 1: 8, so that the surface of the conductor 10 after the stranding does not have dense unevenness, the outer diameter of the tow 11 and the copper wire 12 are different, the two strands
  • the spiral pitch is also different, to a certain extent, the gap between the spiral pitches can be complemented.
  • the soft copper wire 12 is annealed, the process is simple, and it is easy to implement.
  • the pitch ratio of the two twists can be used to ensure the flexibility and power transmission performance of the cable. The ratio, and the pitch ratio of the two twists may also be different.
  • the isolation tape 20 covers the outer side of the conductor 10.
  • the isolation tape 20 is a reinforced nonwoven fabric isolation tape, and the winding thickness is 0.14 mm.
  • the insulation tape 20 may also be other materials, such as FTC phase change fire insulation material insulation tape.
  • the conductor 10 is formed by twisting a plurality of strands 11 and the strand 11 is formed by twisting a plurality of soft copper wires 12, therefore, between each tow 11 and between each soft copper wire 12 Gap, so that the outer surface of the conductor 10 is not smooth, if the insulating layer 30 is directly coated on the outside of the conductor 10, partial discharge is likely to occur when using the low-voltage wind energy cable 100, by covering the conductor 10 with the non-woven isolation tape 20 Outside, the gap between the tows 11 and the soft copper wires 12 can be reduced, making the structure of the conductor 10 more compact and the power transmission performance better, reducing or even avoiding when the low-voltage wind power cable 100 is in use Partial discharge occurs inside the cable, which improves the safety of the low-voltage wind energy cable 100 in use.
  • the insulating layer 30 covers the outside of the isolation tape 20.
  • the insulating layer 30 is made of high-strength flame-retardant ethylene-propylene rubber, and the flame-retardant high-strength ethylene-propylene insulating material is obtained by adding reinforcing agents such as clay to the insulation.
  • Insulation tensile strength reaches 12.3Mpa, which is nearly twice that of ordinary ethylene propylene rubber material (4.2Mpa), making the insulation layer 30 reach VW-1 flame retardant level, and high mechanical properties make the electrical safety performance of the low-voltage wind energy cable 100 get Improve; the cable meets the oil resistance of PRI in UL44 (100 °C, 96h, retention of tensile strength and elongation at break ⁇ 50%), much higher than the oil resistance index of conventional wind energy cables (100 °C, 24h, tensile) Change rate of strength and elongation at break ⁇ 40%). It not only meets the use requirements of wind turbines, but also has higher flame retardancy and electrical safety. It extends the service life to a certain extent and reduces the maintenance cost in the later stage.
  • a filter plate is added to the rubber extruder to increase the pressure of the rubber material in the screw barrel, increase the friction, and plasticize the material to ensure the tightness of the insulation layer 30.
  • the distance of the production die is increased by 1.0mm.
  • the final process conditions are: steam pressure 17Bar, line speed 9m / min, so that the finished insulation can meet the performance It is required to avoid the phenomenon that the hardness of the rubber material is large, the extrusion temperature is high, and the vulcanization temperature is high. It is easy to cause poor plasticization, the surface is not smooth, and the performance of the sulfur is not qualified, and the package is not tight.
  • the outer sheath 40 covers the outside of the insulating layer 30.
  • the material of the outer sheath 40 is chlorinated polyethylene rubber.
  • the positive vulcanization time of chlorinated polyethylene rubber is longer than that of the insulating material.
  • the calculation of the vulcanization process is a key step.
  • the vulcanization process conditions The steam pressure is 17Bar, the water level is controlled at 30%, and the linear velocity is controlled at 9m / min, which ensures that the outer sheath is fully cured and the surface is smooth and smooth.
  • the outer protection extrusion die was chrome-plated to increase the surface finish of the die and prevent the accumulation of coke in the die opening to cause scratches on the surface of the outer sheath 40.
  • the outer sheath 40 has a smooth surface, no scorch, no blistering phenomenon, and has good flame retardant, oil resistance and low temperature resistance properties.
  • the insulating layer 30 and the outer sheath 40 are wrapped around the outer side of the isolation belt 20 by double-layer co-extrusion, and the double-layer simultaneous extrusion method can avoid contamination of the inner-layer insulating surface due to two extrusions separately Problems such as damage and damage occur, so that the two adjacent layers of insulation are closely combined to improve the quality of the cable.
  • a low-voltage wind energy cable 100 is provided.
  • the cable of this structural design has a wide range of applications, has comprehensive advantages such as power transmission and high mechanical strength, and the cable can be produced only by the existing production equipment of the factory.
  • the low-voltage wind energy cable 100 uses a soft copper wire 12 with a small diameter as a basic component unit, and forms a conductor 10 of the low-voltage wind energy cable 100 with a reasonable pitch-to-diameter ratio by twisting in opposite directions twice, so that the low voltage
  • the wind energy cable 100 has a compact structure and good flexibility, so that the cable is not easy to break when twisted, which increases the service life of the cable and reduces operating costs.
  • the insulation layer 30 is made of high-strength ethylene-propylene rubber material. Adding clay and other reinforcing agents to obtain flame-retardant high-strength ethylene-propylene insulation materials makes the tensile strength of the ethylene-propylene rubber material much higher than that of ordinary ethylene-propylene rubber materials, which not only meets the needs of wind turbines, but also is flame-retardant and Higher electrical safety, extend its service life to a certain extent, and reduce the later maintenance cost; the material of outer sheath 40 Chlorinated polyethylene rubber that has been vulcanized for a long time is used. The treated chlorinated polyethylene rubber has better flame retardancy, oil resistance, low temperature resistance and ultraviolet resistance than ordinary chlorinated polyethylene rubber.
  • the outer sheath extrusion die was chrome-plated to increase the finish of the mold surface and prevent the accumulation of coke in the die opening to cause scratches on the outer sheath surface to ensure the smooth surface of the outer sheath. No scorch, no blistering phenomenon, the use of flame retardant high-strength ethylene-propylene rubber material and high flame-retardant chlorinated polyethylene rubber material, so that the finished low-voltage wind power cable 100 can pass the flame retardant FT4 test in UL 1685.
  • FIG. 3 is a schematic structural diagram of a low-voltage wind power cable 100 provided by this embodiment.
  • the difference between this embodiment and Embodiment 1 is that the outer diameters of the soft copper wires 12 twisted to form the tow 11 are different.
  • FIG. 4 is a schematic diagram of the structure of the tow 11 shown in FIG. 3.
  • the tow 11 includes a first copper wire layer 111, a second copper wire layer 112 and a third The copper conductor layer 113, the second copper conductor layer 112 is stranded outside the first copper conductor layer 111, and the third copper conductor layer 113 is stranded outside the second copper conductor layer 112.
  • the first copper The wire layer 111 is a soft copper wire 12 located in the middle of the tow 11
  • the second copper wire layer 112 includes a plurality of soft copper wires 12
  • the third copper wire layer 113 includes a plurality of soft copper wires 12, wherein the second The outer diameter of the soft copper wire 12 in the copper wire layer 112 is smaller than the outer diameter of the soft copper wire 12 in the first copper wire layer 111 and the outer diameter of the soft copper wire 12 in the third copper wire layer 113.
  • the copper wire 12 with a smaller outer diameter can fill part of the gap in the tow 11 formed by twisting, which makes the tow 11 more compact, reduces the possibility of partial discharge, and improves the power transmission performance of the low-voltage wind energy cable 100 and Safety performance.
  • the conductor 10 can also be formed by twisting a plurality of strands 11 with different outer diameters.
  • the smaller diameter outer strands 11 can achieve partial gap filling between the strands 11 and can make the conductor 10 structure. It is more compact, reduces the possibility of partial discharge, and improves the power transmission performance and safety performance of the low-voltage wind energy cable 100.

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Abstract

La présente invention concerne un câble d'énergie éolienne basse tension (100), qui concerne le domaine technique des câbles. Le câble d'énergie éolienne basse tension (100) comprend un conducteur (10), une bande d'isolation (20), une couche d'isolation (30) et une gaine externe (40). La bande d'isolation (20) enveloppe l'extérieur du conducteur (10). La couche d'isolation (30) enveloppe l'extérieur de la bande d'isolation (20), et le matériau de la couche d'isolation (30) est du caoutchouc d'éthylène-propylène. La gaine externe (40) enveloppe l'extérieur de la couche d'isolation (30). Le câble (100) ayant ladite conception structurale a une large gamme d'applications et présente des avantages complets tels qu'une transmission d'énergie et une résistance mécanique élevée. De plus, le câble (100) ne nécessite pas l'ajout de nouvel équipement de production pour réaliser la production du câble d'énergie éolienne basse tension (100), ce qui économise les coûts de production. Le câble présente une excellente flexibilité et ne se casse pas facilement pendant l'utilisation ; en outre, la couche d'isolation (30) du câble d'énergie éolienne basse tension (100) utilise un matériau de caoutchouc d'éthylène-propylène ayant une performance ignifuge et une résistance à la traction améliorées, et la gaine externe (40) utilise du caoutchouc de polyéthylène chloré ayant une performance ignifuge, une résistance à l'huile et une résistance à basse température améliorées de telle sorte que le produit fini du câble d'énergie éolienne basse tension (100) peut passer le test de flamme FT4 sous UL 1685.
PCT/CN2019/115706 2018-11-06 2019-11-05 Câble d'énergie éolienne basse tension WO2020094004A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201821816645.2 2018-11-06
CN201821816645.2U CN209374105U (zh) 2018-11-06 2018-11-06 一种低压风能电缆

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Publication number Priority date Publication date Assignee Title
CN209374105U (zh) * 2018-11-06 2019-09-10 江苏亨通电力电缆有限公司 一种低压风能电缆
CN113871064B (zh) * 2021-08-24 2023-08-22 江苏上上电缆集团有限公司 一种105℃耐扭风能电缆的制造方法及电缆
CN114068061A (zh) * 2021-12-28 2022-02-18 天津金山电线电缆股份有限公司 一种10mw海上风力发电机组用软电缆及其制备方法

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JP2009158331A (ja) * 2007-12-27 2009-07-16 Sanshu Densen Kk 撚線導体
JP2010129257A (ja) * 2008-11-26 2010-06-10 Sumitomo Wiring Syst Ltd 撚線導体
CN103594179A (zh) * 2013-11-25 2014-02-19 无锡市明珠电缆有限公司 一种环保型阻燃耐低温抗扭转风能电缆
CN204155625U (zh) * 2014-08-15 2015-02-11 安徽天康股份有限公司 一种风力发电机用耐寒耐扭转耐酸耐盐碱耐扭曲软电缆
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Publication number Priority date Publication date Assignee Title
CN201166996Y (zh) * 2007-11-11 2008-12-17 远东电缆有限公司 风力发电用耐扭橡套软电缆
JP2009158331A (ja) * 2007-12-27 2009-07-16 Sanshu Densen Kk 撚線導体
JP2010129257A (ja) * 2008-11-26 2010-06-10 Sumitomo Wiring Syst Ltd 撚線導体
CN103594179A (zh) * 2013-11-25 2014-02-19 无锡市明珠电缆有限公司 一种环保型阻燃耐低温抗扭转风能电缆
CN204155625U (zh) * 2014-08-15 2015-02-11 安徽天康股份有限公司 一种风力发电机用耐寒耐扭转耐酸耐盐碱耐扭曲软电缆
CN209374105U (zh) * 2018-11-06 2019-09-10 江苏亨通电力电缆有限公司 一种低压风能电缆

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