CN104916369A - Photoelectrical composite torsion-resistant medium-voltage wind power cable and method for manufacturing the same - Google Patents
Photoelectrical composite torsion-resistant medium-voltage wind power cable and method for manufacturing the same Download PDFInfo
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Abstract
The present invention discloses a photoelectrical composite torsion-resistant medium-voltage wind power cable and a method for manufacturing the same. The cable includes a cable core, a cable wrapping layer, an inner sheath layer, an aramid fiber woven layer and an oversheath layer. The cable core is coated with the cable wrapping layer, the inner sheath layer, the aramid fiber woven layer and the oversheath layer in sequence. The cable core is composed of three power transmission wire cores, three ground wire cores and an optical unit which are twisted together. According to the invention, the optical fiber structure is introduced into the cable, so that the cable can be better used for signal transmission and has the characteristics and functions of optical cables via its own system line resources, thereby achieving system operation monitoring and ensuring secure and stable operation of the system. The power transmission wire cores and the ground wire cores both have outer aramid fiber woven reinforcement layers. As the continuous use temperature range of aramid fibers is -196 DEG C to 204 DEG C, and the aramid fibers have high strength which is 5 to 6 times that of steel wires, so that the strength of the cable is enhanced, and the phenomena such as damage and cracking of the wire cores due to torsion are prevented, thereby ensuring that the cable is not cracked or damaged during torsion, and prolonging the service life of the cable.
Description
Technical field
The invention belongs to field of cables, be specifically related to press wind energy cable and preparation method thereof in a kind of photoelectricity compound warp resistance.
Background technology
Along with the development of wind-power market, wind-driven generator pool-size strengthens year by year, and single-machine capacity brings up to MW class, and as can be seen here, the high-power middle pressure wind energy cable used with matched with blower also has very big market.Wind energy cable mounting and installation is in tower cylinder, and environment for use is severe, meagrely-populated, except the performances such as the tension to cable, cold-resistant, warp resistance have very high requirement, system monitoring, transfer of data are also had high requirements, to ensure system safety, stable operation.And prior art Problems existing is: existing middle pressure Wind power cable is only limitted to realize delivery of electrical energy.
Summary of the invention
Goal of the invention: in order to solve the deficiencies in the prior art, the invention provides in a kind of photoelectricity compound warp resistance and press wind energy cable, ensure that cable cold resistance is good, tensile strength is high, warp resistance is good, while long service life, by its own system line resource, and have concurrently optical cable feature and function, realize system cloud gray model monitoring, ensure system safety, stable operation.
Technical scheme: press wind energy cable in a kind of photoelectricity compound warp resistance, comprise cable core, stranding belting layer, inner restrictive coating, aramid fiber braid and external sheath layer, described cable core is overmolding to cable wrap belt, inner restrictive coating, aramid fiber braid and external sheath layer outward successively;
Described cable core is by three electric power transfer cores and three wire core and fiber unit is stranded forms; Laying up pitch is not more than 10 times, adopts nonwoven fabrics to tighten, prevents loose; Described inner sheath, oversheath all adopt CPE material, and have the performance such as good fire-retardant, cold-resistant, oil resistant, acid and alkali-resistance, weather-proof, chemical-resistant resistance, and pliability is good, easy to process, cost is low.
Described electric power transfer core is made up of zinc-plated stranded conductor layer, semi-conductive cloth tape layer, conductor shield, ethylene propylene rubber insulated layer, insulation screen, aramid fiber braid; Described zinc-plated stranded conductor layer adopt first in the same way synnema more in the same way again strand technique make; Described zinc-plated stranded conductor layer outer coated semi-conductive cloth tape layer, conductor shield, insulating barrier, insulation screen and aramid fiber braid successively;
Described wire core is made up of zinc-plated stranded conductor layer, semi-conductive layer and aramid fiber braid; Described zinc-plated stranded conductor layer adopt first in the same way synnema more in the same way again strand technique make; Described zinc-plated stranded conductor layer is coated with semi-conductive layer and aramid fiber braid outward successively;
Described fiber unit is made up of fibre core, covering, coat and tight sleeve layer; Described fibre core outer coated covering, coat and tight sleeve layer successively.
As optimization: described zinc-plated stranded conductor layer adopts the first synnema in the same way of 5 class tinned copper wires to answer strand more in the same way and forms, synnema pitch controls below 20 times, twisting pitch again controls at 10 ~ 13 times, conductor diameter is little, smooth surface rounding and pliability is fabulous, avoid conductor because of first restraint in the same way more oppositely again strand to form conductive surface gap large, poor to insulation resistance, easily to puncture and external diameter is comparatively large, be unfavorable for the mounting and installation in less space; Semi-conductive cloth tape is surrounded with, to improve cable electrical insulation properties outside conductor.
As optimization: it is the semiconductive material of base-material that described conductor shield and insulation screen all adopt with EPDM, and not only good insulation preformance, material softness is good, and mechanical strength is high.
As optimization: described inner restrictive coating and external sheath layer all adopt the haloflex material of homemade cold-resistant-40 DEG C, and cost is low, easy to process, and the excellent performance such as fire-retardant, cold-resistant, oil resistant, acid and alkali-resistance, weather-proof, chemical-resistant resistance.
Press a preparation method for wind energy cable in described photoelectricity compound warp resistance, comprise the steps:
(1) tinned copper conductor is produced: copper conductor continuous casting and rolling → copper bar wire drawing → carefully draw annealing → zinc-plated → synnema → multiple strand;
Copper ingot or copper coin are formed 8mm hard copper bar through casting and rolling process after melting furnace, holding furnace, then this hard copper bar is drawn into through big drawing machine the copper wire that string diameter is 1.2mm, and then through little machine drawing, 1.2mm copper wire is drawn into the string diameter of needs, zinc-plated through the annealing of strip machine again, zinc-plated rear monofilament meets the TXR type tin-plating round copper wire requirement that GB/T 4910-2009 specifies; Again by some zinc-plated monofilament left-hand synnemas, synnema pitch controls below 20 times, strand after synnema again left-hand twists again, twisting pitch again controls at 10 ~ 13 times, conductor after stranded should meet GB/T 3956-2008 requirement, conductor after stranded needs wrapped semi-conductive cloth tape, multiple strand, wrappedly to carry out simultaneously;
(2) light cellular manufacture flow process: drawing optical fibers → optical fiber coating → optical fiber coloring → connection with fibre coating → optical fiber, reinforcement stranding → light unit sheath;
Drawing optical fibers adopts preform to heat softening in high temperature furnace, pull into long filament: the process of prefabricated stick drawn wire will be carried out under the environment of dustless constant temperature, prefabricated rods at the uniform velocity delivers to pot arch by feed mechanism, pot arch temperature controls at 1900 ~ 2100 DEG C, viscosity when prefabricated rods tip is heated to uniform temperature, form fiber by sagging the attenuating of own wt, fiber wire diameter has to pass through laser beam measuring wire diameter instrument precision monitor, post-tensioning to carry-over pinch rolls around on reel; The optical fiber surface being drawn into silk may form crackle, and fiber strength is reduced, so optical fiber must apply, the material of coating generally adopts silicone resin or acrylate materials, and the optical fiber surface through coating is protected;
As optical fiber needs chromatic zones timesharing, then need carry out coloring treatment to optical fiber and carry out UV solidification to dyed layer, prevent dyed layer in the situations such as production process or bending in using, distortion from coming off;
The employing of light unit sheath extrudes mode and makes, and material adopts cold-resistant polyolefine material;
(3) insulated wire cores production procedure, three-layer co-extruded: internal shield, insulating barrier, outer shielding layer extrude → sulfuration;
Insulation adopts advanced three-layer co-extruded equipment to extrude, Inner mould joins mould=conductor diameter+(0.1 ~ 0.3) mm, middle mould joins that mould is a fixed dimension, mould formula=finished product external diameter+(-0.2 ~ 0.3) joined by external mold, speed of production controls at 20 ~ 25m/min, steam pressure is 1.2 ~ 1.5Mpa, and steam auto-compensation ensures steam pressure constant;
(4) aramid fiber braiding:
Aramid fiber strand, then to be woven by 32 ingots or 36 ingot braiding machines on weaving spindle through doubling winder after-combustion, and angle of weave general control is at 35 ~ 50 DEG C, and braid answers uniformly continous without leakage ingot;
(5) cabling procedure production procedure:
According to this product structure demand, electric power transfer core, wire core, fiber unit are twisted into cable core according to certain sequence, direction of lay and pitch, by fiber unit in centre, the structure of electric power core and wire core spaced arrangement surrounding is stranded, and cable core uses nonwoven fabrics to tighten;
(6) inner/outer sheath production procedure:
Extruded by the rubber extruding equipment of specialty, core rod joins mould formula=core external diameter+(0.3 ~ 1.0) mm, die sleeve joins mould formula=finished product external diameter+(-0.2 ~ 0.3) mm, speed of production controls at 5 ~ 8m/min, steam pressure 1.3 ~ 1.5Mpa, steam auto-compensation ensures steam pressure constant;
(7) lettering:
Lettering carries out together with oversheath operation, can adopt ink jet printer for printing, and lettering content comprises " factory's name, model, electric pressure, specification, rice mark ", lettering through the cotton that gets wet dab 10 times still clear and legible;
(8) exfactory inspection:
Construction of cable size, conductor resistance, partial discharge, ac voltage withstanding, insulation resistance, optical fiber attenuation are detected;
(9) packaging warehouse-in.
Beneficial effect: the invention provides in a kind of photoelectricity compound warp resistance and press wind energy cable, optical fiber structure is introduced in cable, better can be used as Signal transmissions, and by its own system line resource, have feature and the function of optical cable concurrently, realize system cloud gray model monitoring, ensure system safety, stable operation.
This patent forms because conductor structure adopts the first synnema in the same way of 5 class tinned copper wires to answer strand more in the same way, synnema pitch controls below 20 times, twisting pitch again controls at 10 ~ 13 times, conductor diameter is little, smooth surface rounding and pliability is fabulous, avoid conductor because of first restraint in the same way more oppositely again strand to form conductive surface gap large, poor to insulation resistance, easily to puncture and external diameter is comparatively large, be unfavorable for the mounting and installation in less space; Multiple strand wrapped semi-conductive cloth tape simultaneously, ensures cable electrical insulation property.
This patent electric power transfer core and wire core all adopt aramid fiber braiding reinforced layer outward, the continuous serviceability temperature scope of aramid fiber is-196 DEG C ~ 204 DEG C, and intensity is very high, it is 5 ~ 6 times of steel wire, strengthen the intensity of cable greatly, avoid causing that core is impaired, cracking phenomena because reversing, thus ensure that cable does not ftracture when reversing, do not damage, to extend cable useful life.
Described this patent cable adopts photoelectric composite structured; fiber unit can play the effect of transfer of data and system monitoring at cable; and optical fiber structure is in the centre of cable; reasonably make use of the space of cable; the increase of external diameter and cost can not be caused; simultaneously based on the mechanism of cable, optical fiber is played a protective role, prevents optical fiber to be subject to mechanical damage etc.The advantages such as optical fiber communication has at a high speed, stable, reliable, antijamming capability is strong, have feature and the function of optical cable concurrently, realize transfer of data, system cloud gray model monitoring effect, for transfer of data, have that transmission capacity is large, long transmission distance, transmission quality can not be subject to electromagnetic interference.Among optical fibre drop cables, not only realize Signal transmissions and systems axiol-ogy, also can realize wind generator system being incorporated to intelligent grid, greatly improve electric energy conversion amount, favour state is favorable to the people.
In sum, this patent feature is as follows:
1. special conductor structure design, improve conductive surface quality and flexibility, bending radius is not more than 6D, ensures cable insulation electric property simultaneously.
2. the design of aramid fiber braid, strengthens the intensity of cable greatly, thus does not ftracture, do not damage when ensureing that cable reverses, to extend cable useful life.
3. the introducing of fiber unit, not only can be used for Signal transmissions, also can realize cable operational monitoring.
4. by the structural design of cable and by using specific material, make cable can in the environment of salt air corrosion, high damp and hot, cold, greasy dirt Long-Time Service, and resistance to torsion meets the requirement of TICW 11-2012 appendix A.
5. the design of this patent structure and raw-material selection, not only easy to process, and production cost is low, can produce in batches and promote.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention, and Fig. 2 is fiber unit structural representation;
Fig. 3 is process chart of the present invention.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment
As shown in Figure 1, wind energy cable is pressed in a kind of photoelectricity compound warp resistance, comprise cable core 1, stranding belting layer 2, inner restrictive coating 3, aramid fiber braid 4 and external sheath layer 5, described cable core 1 is outer is overmolding to cable wrap belt 2, inner restrictive coating 3, aramid fiber braid 4 and external sheath layer 5 successively.
Described cable core 1 is by three electric power transfer cores 11 and three wire core 12 and fiber unit 13 is stranded forms.
Described electric power transfer core 11 is made up of zinc-plated stranded conductor layer 111, semi-conductive cloth tape layer 112, conductor shield 113, ethylene propylene rubber insulated layer 114, insulation screen 115, aramid fiber braid 116; Described zinc-plated stranded conductor layer 111 adopt first in the same way synnema more in the same way again strand technique make; Described zinc-plated stranded conductor layer 111 outer coated semi-conductive cloth tape layer 112, conductor shield 113, insulating barrier 114, insulation screen 115 and aramid fiber braid 116 successively.
Described wire core 12 is made up of zinc-plated stranded conductor layer 121, semi-conductive layer 122 and aramid fiber braid 123; Described zinc-plated stranded conductor layer 121 adopt first in the same way synnema more in the same way again strand technique make; Described zinc-plated stranded conductor layer 121 is outer is coated with semi-conductive layer 122 and aramid fiber braid 123 successively.
Described fiber unit 13 is made up of fibre core 131, coat 132, covering 133 and tight sleeve layer 134; Described fibre core 131 outer coated coat 132, covering 133 and tight sleeve layer 134 successively.
Particularly, described zinc-plated stranded conductor layer 111,121 adopts the first synnema in the same way of 5 class tinned copper wires to answer strand more in the same way and forms, and synnema pitch controls below 20 times, twists pitch again and controls at 10 ~ 13 times.It is the semiconductive material of base-material that described conductor shield 113 and insulation screen 115 all adopt with EPDM.Described inner restrictive coating 3 and external sheath layer 5 all adopt the haloflex material of homemade cold-resistant-40 DEG C.
As shown in Figure 3, press the preparation method of wind energy cable in a kind of described photoelectricity compound warp resistance, comprise the steps:
(1) tinned copper conductor is produced: copper conductor continuous casting and rolling → copper bar wire drawing → carefully draw annealing → zinc-plated → synnema → multiple strand;
Copper ingot or copper coin are formed 8mm hard copper bar through casting and rolling process after melting furnace, holding furnace, then this hard copper bar is drawn into through big drawing machine the copper wire that string diameter is 1.2mm, and then through little machine drawing, 1.2mm copper wire is drawn into the string diameter of needs, zinc-plated through the annealing of strip machine again, zinc-plated rear monofilament meets the TXR type tin-plating round copper wire requirement that GB/T 4910-2009 specifies; Again by some zinc-plated monofilament left-hand synnemas, synnema pitch controls below 20 times, strand after synnema again left-hand twists again, twisting pitch again controls at 10 ~ 13 times, conductor after stranded should meet GB/T 3956-2008 requirement, conductor after stranded needs wrapped semi-conductive cloth tape, multiple strand, wrappedly to carry out simultaneously;
(2) light cellular manufacture flow process: drawing optical fibers → optical fiber coating → optical fiber coloring → connection with fibre coating → optical fiber, reinforcement stranding → light unit sheath;
Drawing optical fibers adopts preform to heat softening in high temperature furnace, pull into long filament: the process of prefabricated stick drawn wire will be carried out under the environment of dustless constant temperature, prefabricated rods at the uniform velocity delivers to pot arch by feed mechanism, pot arch temperature controls at 1900 ~ 2100 DEG C, viscosity when prefabricated rods tip is heated to uniform temperature, form fiber by sagging the attenuating of own wt, fiber wire diameter has to pass through laser beam measuring wire diameter instrument precision monitor, post-tensioning to carry-over pinch rolls around on reel; The optical fiber surface being drawn into silk may form crackle, and fiber strength is reduced, so optical fiber must apply, the material of coating generally adopts silicone resin or acrylate materials, and the optical fiber surface through coating is protected;
As optical fiber needs chromatic zones timesharing, then need carry out coloring treatment to optical fiber and carry out UV solidification to dyed layer, prevent dyed layer in the situations such as production process or bending in using, distortion from coming off;
The employing of light unit sheath extrudes mode and makes, and material adopts cold-resistant polyolefine material;
(3) insulated wire cores production procedure, three-layer co-extruded: internal shield, insulating barrier, outer shielding layer extrude → sulfuration;
Insulation adopts advanced three-layer co-extruded equipment to extrude, Inner mould joins mould=conductor diameter+(0.1 ~ 0.3) mm, middle mould joins that mould is a fixed dimension, mould formula=finished product external diameter+(-0.2 ~ 0.3) joined by external mold, speed of production controls at 20 ~ 25m/min, steam pressure is 1.2 ~ 1.5Mpa, and steam auto-compensation ensures steam pressure constant;
(4) aramid fiber braiding:
Aramid fiber strand, then to be woven by 32 ingots or 36 ingot braiding machines on weaving spindle through doubling winder after-combustion, and angle of weave general control is at 35 ~ 50 DEG C, and braid answers uniformly continous without leakage ingot;
(5) cabling procedure production procedure:
According to this product structure demand, electric power transfer core, wire core, fiber unit are twisted into cable core according to certain sequence, direction of lay and pitch, by fiber unit in centre, the structure of electric power core and wire core spaced arrangement surrounding is stranded, and cable core uses nonwoven fabrics to tighten;
(6) inner/outer sheath production procedure:
Extruded by the rubber extruding equipment of specialty, core rod joins mould formula=core external diameter+(0.3 ~ 1.0) mm, die sleeve joins mould formula=finished product external diameter+(-0.2 ~ 0.3) mm, speed of production controls at 5 ~ 8m/min, steam pressure 1.3 ~ 1.5Mpa, steam auto-compensation ensures steam pressure constant;
(7) lettering:
Lettering carries out together with oversheath operation, can adopt ink jet printer for printing, and lettering content comprises " factory's name, model, electric pressure, specification, rice mark ", lettering through the cotton that gets wet dab 10 times still clear and legible;
(8) exfactory inspection:
Construction of cable size, conductor resistance, partial discharge, ac voltage withstanding, insulation resistance, optical fiber attenuation are detected;
(9) packaging warehouse-in.
The present invention is not limited to above-mentioned preferred forms; anyone can draw other various forms of products under enlightenment of the present invention; no matter but any change is done in its shape or structure; every have identical with the application or akin technical scheme, all drops within protection scope of the present invention.
Claims (5)
1. press wind energy cable in a photoelectricity compound warp resistance, it is characterized in that: comprise cable core, stranding belting layer, inner restrictive coating, aramid fiber braid and external sheath layer, described cable core is overmolding to cable wrap belt, inner restrictive coating, aramid fiber braid and external sheath layer outward successively;
Described cable core is by three electric power transfer cores and three wire core and fiber unit is stranded forms;
Described electric power transfer core is made up of zinc-plated stranded conductor layer, semi-conductive cloth tape layer, conductor shield, ethylene propylene rubber insulated layer, insulation screen, aramid fiber braid; Described zinc-plated stranded conductor layer adopt first in the same way synnema more in the same way again strand technique make; Described zinc-plated stranded conductor layer outer coated semi-conductive cloth tape layer, conductor shield, insulating barrier, insulation screen and aramid fiber braid successively;
Described wire core is made up of zinc-plated stranded conductor layer, semi-conductive layer and aramid fiber braid; Described zinc-plated stranded conductor layer adopt first in the same way synnema more in the same way again strand technique make; Described zinc-plated stranded conductor layer is coated with semi-conductive layer and aramid fiber braid outward successively;
Described fiber unit is made up of fibre core, covering, coat and tight sleeve layer; Described fibre core outer coated covering, coat and tight sleeve layer successively.
2. press wind energy cable in photoelectricity compound warp resistance according to claim 1, it is characterized in that: described zinc-plated stranded conductor layer adopts the first synnema in the same way of 5 class tinned copper wires to answer strand more in the same way and forms, synnema pitch controls below 20 times, twists pitch again and controls at 10 ~ 13 times.
3. press wind energy cable in photoelectricity compound warp resistance according to claim 1, it is characterized in that: it is the semiconductive material of base-material that described conductor shield and insulation screen all adopt with EPDM.
4. press wind energy cable in photoelectricity compound warp resistance according to claim 1, it is characterized in that: described inner restrictive coating and external sheath layer all adopt the haloflex material of homemade cold-resistant-40 DEG C.
5. press a preparation method for wind energy cable in photoelectricity compound warp resistance according to claim 1, it is characterized in that: comprise the steps:
(1) tinned copper conductor is produced: copper conductor continuous casting and rolling → copper bar wire drawing → carefully draw annealing → zinc-plated → synnema → multiple strand;
Copper ingot or copper coin are formed 8mm hard copper bar through casting and rolling process after melting furnace, holding furnace, then this hard copper bar is drawn into through big drawing machine the copper wire that string diameter is 1.2mm, and then through little machine drawing, 1.2mm copper wire is drawn into the string diameter of needs, zinc-plated through the annealing of strip machine again, zinc-plated rear monofilament meets the TXR type tin-plating round copper wire requirement that GB/T4910-2009 specifies; Again by some zinc-plated monofilament left-hand synnemas, synnema pitch controls below 20 times, strand after synnema again left-hand twists again, twisting pitch again controls at 10 ~ 13 times, conductor after stranded should meet GB/T 3956-2008 requirement, conductor after stranded needs wrapped semi-conductive cloth tape, multiple strand, wrappedly to carry out simultaneously;
(2) light cellular manufacture flow process: drawing optical fibers → optical fiber coating → optical fiber coloring → connection with fibre coating → optical fiber, reinforcement stranding → light unit sheath;
Drawing optical fibers adopts preform to heat softening in high temperature furnace, pull into long filament: the process of prefabricated stick drawn wire will be carried out under the environment of dustless constant temperature, prefabricated rods at the uniform velocity delivers to pot arch by feed mechanism, pot arch temperature controls at 1900 ~ 2100 DEG C, viscosity when prefabricated rods tip is heated to uniform temperature, form fiber by sagging the attenuating of own wt, fiber wire diameter has to pass through laser beam measuring wire diameter instrument precision monitor, post-tensioning to carry-over pinch rolls around on reel; The optical fiber surface being drawn into silk may form crackle, and fiber strength is reduced, so optical fiber must apply, the material of coating generally adopts silicone resin or acrylate materials, and the optical fiber surface through coating is protected;
As optical fiber needs chromatic zones timesharing, then need carry out coloring treatment to optical fiber and carry out UV solidification to dyed layer, prevent dyed layer in the situations such as production process or bending in using, distortion from coming off;
The employing of light unit sheath extrudes mode and makes, and material adopts cold-resistant polyolefine material;
(3) insulated wire cores production procedure, three-layer co-extruded: internal shield, insulating barrier, outer shielding layer extrude → sulfuration;
Insulation adopts advanced three-layer co-extruded equipment to extrude, Inner mould joins mould=conductor diameter+(0.1 ~ 0.3) mm, middle mould joins that mould is a fixed dimension, mould formula=finished product external diameter+(-0.2 ~ 0.3) joined by external mold, speed of production controls at 20 ~ 25m/min, steam pressure is 1.2 ~ 1.5Mpa, and steam auto-compensation ensures steam pressure constant;
(4) aramid fiber braiding:
Aramid fiber strand, then to be woven by 32 ingots or 36 ingot braiding machines on weaving spindle through doubling winder after-combustion, and angle of weave general control is at 35 ~ 50 DEG C, and braid answers uniformly continous without leakage ingot;
(5) cabling procedure production procedure:
According to this product structure demand, electric power transfer core, wire core, fiber unit are twisted into cable core according to certain sequence, direction of lay and pitch, by fiber unit in centre, the structure of electric power core and wire core spaced arrangement surrounding is stranded, and cable core uses nonwoven fabrics to tighten;
(6) inner/outer sheath production procedure:
Extruded by the rubber extruding equipment of specialty, core rod joins mould formula=core external diameter+(0.3 ~ 1.0) mm, die sleeve joins mould formula=finished product external diameter+(-0.2 ~ 0.3) mm, speed of production controls at 5 ~ 8m/min, steam pressure 1.3 ~ 1.5Mpa, steam auto-compensation ensures steam pressure constant;
(7) lettering:
Lettering carries out together with oversheath operation, can adopt ink jet printer for printing, and lettering content comprises " factory's name, model, electric pressure, specification, rice mark ", lettering through the cotton that gets wet dab 10 times still clear and legible;
(8) exfactory inspection:
Construction of cable size, conductor resistance, partial discharge, ac voltage withstanding, insulation resistance, optical fiber attenuation are detected;
(9) packaging warehouse-in.
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| CN201510357977.3A CN104916369B (en) | 2015-06-25 | 2015-06-25 | Photoelectrical composite torsion-resistant medium-voltage wind power cable and method for manufacturing the same |
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| CN109102952A (en) * | 2018-09-06 | 2018-12-28 | 中天科技装备电缆有限公司 | A kind of compound wind energy cable of cold-resistant anti-torsion optical fiber and its manufacturing method |
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