ã€China Aluminum Network】 Since 2006 and 2007, UMI Electric Corporation and Tianjin Jialu Company have brought in aluminum alloy cable technology and products originating from the United States, and have initiated and promoted the domestic aluminum alloy cable industry since the aluminum alloy cable technology and Products have gradually been accepted by the majority of domestic users. Today, aluminum alloy cable technology is playing an increasingly important role in the practice of building a resource-saving society in which aluminum is used as a substitute for copper in the field of medium and low-voltage power distribution. The aluminum alloy cable industry and the market are also entering Flourishing stage.
However, there is a lack of scientific and systematic publicity and introduction on new products of aluminum alloy cables on the market. As a result, users and related personnel have many questions and misunderstandings about the aluminum alloy cable technology and products, which affects the healthy development of the industry and the market. . To this end, we need to sort out the basic situation of aluminum alloy cable technology and products, form this article, in order to readers, hope to users and related industry personnel to understand the aluminum alloy cable technology and products.
First, aluminum alloy cable technology and product origin
After the end of the Second World War, in 1946, the United States formulated a technical policy of "copper-on-aluminum" in response to a shortage of copper resources. However, in the 1960s, early installation of aluminum-core electrical lines suffered frequent fires. It is a connection failure. The performance defects of aluminum cables have led to increasingly serious hidden problems in connection security, and complaints from the power sector and residents have continued.
Later, with the development of alloy smelting technology, some research and development laboratories of metallurgical companies have done a lot of research and successfully developed electric aluminum alloys. In further studies, it has been found that aluminum alloys have very good properties such as greater strength, higher ductility, and better creep resistance. Later, these aluminum alloy materials were listed in the 8000 series aluminum alloy product catalog by the Aluminum Association of America.
In 1968, Southwire passed the research and development of aluminum alloys, invented the mainstream brand 8176 aluminum alloy in the 8000 series, and made the 8176 brand aluminum alloy cable series which is currently the mainstream of the North American market.
In 1970, related wire and cable companies in the United States, as well as companies in other industries such as electrical product laboratories and connector companies, formulated plans to re-evaluate aluminum and aluminum alloy conductors. The electrical laboratory re-evaluated the aluminum alloy core cable, and the connector company re-created a new type of aluminum alloy connector whose aluminum alloy core cable has the same performance as the aluminum alloy core cable. After stringent screening of aluminum alloy core cables, the United States wire and cable companies chose 8000 series aluminum alloys and began to use in the manufacture of power cables for construction and other fields. Among them, the most widely used is AA-8176 aluminum alloy. In the U.S. national regulations, it is also stipulated that the relevant cable manufacturing must adopt the new alloy AA-8000 series electrical grade aluminum alloy material. In order to cooperate with and support wire and cable manufacturers, connector companies and electrical laboratories have actively developed connector technology for AA-8000 series aluminum alloy conductors. Breakthroughs in connector technology have been achieved, and aluminum alloy core cable performance is consistent with aluminum. Alloy connector products are widely used with aluminum alloy cables. The application of American alloy cable, from product technology invention to related accessory connector technology and product improvement, took only two years.
In the 1980s, the U.S. electrical industry, including the wire and cable industry, achieved new developments. For product standards, procedures, and technical specifications, electrical grade 8000 series aluminum alloy conductors are all beginning to be cited. In 1981, the American Society of Materials Testing (ASTM) working group began to prepare AA-8000 series aluminum alloy conductor standards. In 1985, a proposal for the inclusion of AA-8000 series aluminum alloy conductors in the National Electrical Code was proposed. In the same year, the Underwriters Laboratories (UL) revised the UL83 standard. In most aluminum alloy core cables, AA-8000 aluminum alloy conductors are required. In the fall of 1988, ASTM completed the preparation of AA-8000 series aluminum conductor conductor specifications and published ASTM B-800 and ASTM B-801 standards. Since then, AA-8000 series aluminum alloys have been legally used as construction wire and cable and power cable conductors, and they have been rapidly promoted around the world. This situation has continued to this day.
Therefore, the fact that users and related industry personnel have to understand clearly is:
In the United States and other countries, the use of aluminum alloy cables for safety has been used for several decades, and that is the successful result of the joint action and use of aluminum alloy cables and aluminum alloy connectors that have the same performance as the cables.
The progress in the application of aluminum-core cables in China is very different from that in the United States. In the fifties of the last century, copper prices rose at a high speed. The world wire and cable industry proposed replacing aluminum with copper. To achieve the same electrical performance, the cross-sectional area of ​​aluminum conductors needs to be one to two specifications or 50% larger than copper conductors. China is also affected by the conditions of the country, resources, political factors, etc. In 1957, "aluminum substitute copper" has been identified as an important technology policy, but due to poor implementation and material technology, aluminum conductors have not been popularized. Over the years, the Chinese people have been looking forward to the development of a conductor that can utilize the aluminum resources. They can continue to implement copper substitutes for aluminum, but they have never been able to make breakthroughs in technology and have not been able to achieve this historic revolution. In 2006 and 2007, UMI Electric Corporation and Tianjin Alcan Corporation brought in aluminum alloy cable technology and products originating from the United States, which made the people fresh and new and created and promoted the domestic aluminum alloy cable business.
Second, aluminum alloy cable connection solutions (application of aluminum alloy cable first question)
(A) The correct connection scheme for aluminum alloy cables (Achieves historical connection schemes for the safe and accident-free use of aluminum alloy cables in North America and other countries in the past 50 years). Aluminum alloy connectors must be used in conjunction with cable performance when connecting aluminum alloy cables.
(B) Aluminum alloy cable misconnection scheme is currently used in domestic aluminum alloy cable connection using aluminum connectors such as copper-aluminum transition terminals for aluminum cables and aluminum alloy connectors with inconsistent cable performance as the connection scheme. This connection scheme will leave hidden safety hazards, leaving the advantages and value of aluminum alloy cables out of use, and the use of aluminum alloy cables will become unadvantaged and valuable.
Some domestic companies are propagandizing the wrong connection scheme of aluminum alloy cables for their own interests or simply do not understand the application characteristics of aluminum alloy cables. They are also arguing that aluminum connectors such as copper-aluminum transition terminals can be used for the connection of aluminum alloy cables. As we all know, the application of cables, safety issues are basically in the connection, if the aluminum alloy cable connection, the use of aluminum connectors with potential safety problems, then the use of aluminum alloy cable will have no advantage and value. This kind of disrespecting science, not considering user safety, and irresponsible behavior will definitely end up hurting others.
Non-aluminum alloy cables, and several AA-8000 conductor cable performance inconsistent connector (for example: copper and aluminum transition terminal and aluminum alloy connector with AA-8000 conductor cable performance, etc.) several fatal problems:
(1) Copper-aluminum transition terminals Due to the presence of aluminum in the terminals, the problem of defects and deficiencies of all aluminum still exists. If such terminals are used to connect aluminum alloy cables, the advantages and values ​​of the aluminum alloy cables will disappear. Aluminum cables are used directly, because aluminum cables are more economical.
(2) Because the copper-aluminum transition terminal was originally used to connect aluminum cables, the size of the terminal installation does not match the size of the terminal equipment. This not only increases the cost of transferring bronze medals, but also transfers the bronze medals in multiple passes, which will also leave connection security risks.
(3) Due to the mismatch between the copper-aluminum transition connecting terminals and the electrical terminals, there is an increase in the contradiction of transferring bronze medals and often causing costs, and it is difficult to avoid connection security risks resulting from brutal construction due to unsolvable problems of this type.
(4) Because the copper-aluminum transition terminal was originally used to connect aluminum cables, the inner diameter of the terminal does not match the outer diameter of the cable conductor, and special crimping tools must be used, which makes it difficult to standardize the construction and leave connection security risks.
(5) The purity of aluminum in the various brands of copper-aluminum transition terminals currently used in the market can only reach 99.5% (note: the purity of general electrical aluminum is above 99.7%). Moreover, the aluminum in the copper-aluminum transition terminal is also manufactured and solidified and quenched with relatively poor conductivity. Therefore, the integrated conductivity of these copper-aluminum transition terminals can only be less than 54% IACS. The rate requirement is above 61% IACS), which causes the electrical performance of the terminal and aluminum alloy cable to be mismatched. As a result, the transmission line resistivity increases by 21% or more, the line transmission capability decreases by 21% or the line loss increases by more than 21%.
As for the other aluminum alloy terminals with inconsistent performance of AA-8000 conductor aluminum alloy, due to differences in the physical, mechanical, electrical, compressive creep properties of the material and AA-8000 conductor aluminum alloy performance, if such terminals for aluminum It is self-evident that problems such as hidden safety problems will be caused by the connection of alloy cables.
Therefore, the second fact that users and related industry personnel must clearly understand is:
To ensure that the advantages and value of aluminum alloy cables can be brought into play and embodied, the preconditions for the safe and non-hidden application of aluminum alloy cables are: the aluminum alloy cables complying with the standards and the supporting aluminum alloy connectors that are consistent with the cable performance are used together.
All kinds of aluminum alloy cable connection applications, we have clearly realized that the quality of aluminum alloy cable is a good foundation, and the correct aluminum alloy connector connection solution is the ultimate reflection of the application value of aluminum alloy cable. Therefore, when purchasing and using aluminum alloy cables, the first problem is to choose the right connection solution, followed by the same level of brand, price and other issues.
It is understood that one of the domestic aluminum alloy cable full set of technical product solutions provider is the UMI aluminum alloy cable brand from the United States.
Third, the use of aluminum alloy cable and copper cable, use value and use of areas
1. Both cables have the same use status
The cable manufacturing standard GB/T 3956-2008 "Conductors for Cables" and the standards for use, namely the national industry standards issued by the Ministry of Housing and Urban-Rural Development, JGJ 242-2011 "Design Code for Electrical Installation of Residential Buildings" and JGJ48-2014 "Design Specification for Store Buildings" are all clear. Aluminum alloy cable and copper cable have the same use status.
2. Both cables have the same use value
Aluminum alloy cables and copper cables are different from the conductor materials, insulation, armoring methods and production techniques are superior to copper cables, jackets and other assessment conditions are the same as copper cables. The electrical performance of the aluminum alloy cable is the same as that of the copper cable by increasing the cross section of the conductor, and the mechanical performance is better than that of the copper cable. Both cables have the same use value.
3, AA8000 series aluminum alloy cable, because of the conductor material characteristics, production process and other factors, should be manufactured for the 35KV voltage level below the power distribution field power cable, aluminum alloy cable conductor cross-section should be 16-500mm2. Because it is impossible to solve the problems such as supporting aluminum alloy connectors, it is not suitable to manufacture wires for the field of cloth wires.
Fourth, aluminum alloy cable manufacturing and application of relevant standards
1, cable manufacturing standards
In North America and other countries, the manufacture of aluminum alloy cables is mainly based on American Standard ASTM B 800 05 (2011) and 80107 (R2012) for production and inspection. In China, the current state-of-the-art manufacturing standard for aluminum alloy cables, rated voltage 0.6/1kV aluminum alloy conductor XLPE insulated power cables, is pending. Before the introduction of special standards, aluminum alloy cable manufacturing, inspection, in addition to aluminum alloy armored aluminum alloy armored cable production, inspection, other projects are mainly reference GB/T 12706.1-2008 and other copper standards. As for other special requirements of aluminum alloy cables, such as flame retardant, smoke poisoning, and fire-resistant products, the special performances of aluminum alloy cables and copper cables are similar to those of copper cables.
From the understanding, aluminum alloy cable manufacturing, compared with the main reference standards are: American Standard ASTM B 800 05 (2011), 80107 (R2012) and the national industry standard "rated voltage 0.6/1kV aluminum alloy conductor XLPE insulated power cable 》
2, conductor manufacturing standards
For the manufacture of aluminum alloy conductor materials, the manufacturing technology of most domestic manufacturers currently does not meet the requirements of American Standard ASTM B 800 05 (2011).
For domestic manufacture and inspection of aluminum alloy conductor materials, the new national standard GB/T "Aluminum alloy wire for cable conductors" is a more comprehensive and authoritative standard. Most domestic manufacturers do not meet the requirements of American Standard ASTM B 800 05 (2011) and National Standard GB/T "Aluminum conductors for cable conductors" in the manufacture of aluminum alloy conductor materials due to technical reasons. Can refer to GB/T "Rare earth iron alloy rod for electrical appliances" and the new version of GB/T 3954-2014 "electrical round aluminum rod" standard, but because of these standards have technical limitations, and the American standard ASTM B 800 05 ( There is a gap between the 2011) and national standard GB/T "Aluminum alloy wire for cable conductors" and there is still a lack of general guidance.
Different levels of implementation of the technical standards, resulting in aluminum alloy cables in the market today due to uneven conductor material, making aluminum alloy cable product quality gap is too great.
From the above, the conductor aluminum alloy material manufacturing, compared with the main reference standards are: American Standard ASTM B 800 05 (2011) and national standard GB/T "Aluminum conductors for cable conductors."
3, aluminum alloy cable application standards
Domestic aluminum alloy cable application standards have been relatively complete, the Ministry of Housing and Industry issued the national industry standard JGJ242-2011 "Residential Building Electrical Design Specification" and JGJ48-2014 "store building design specifications", National Building Standard Design Atlas 10CD106 "Aluminum Alloy Guidelines for the laying and installation of cables and other important guiding standards and specifications, and local guidelines and specifications similar to the “Regulations for the Design, Construction, and Acceptance of Aluminum Alloy Cable Engineering†promulgated and implemented by the provincial administrative departments such as the Provincial Department of Housing and Construction have already become material Guiding value.
Fifth, the decisive factor of aluminum alloy cable quality
1, the quality of conductor aluminum alloy rod
The key to determining the quality of aluminum alloy cables lies in the quality and quality of their conductor materials. If the conductor aluminum alloy rod material is not qualified, the quality of the aluminum alloy cable cannot be discussed. The advantages and disadvantages of the conductor aluminum alloy rod material basically determine the superiority and inferiority of the finished aluminum alloy cable from the objective conditions.
The basic judgement of the quality of aluminum alloy cable products is firstly to assess the quality of conductor aluminum alloy rods. The production of aluminum alloy cables is different from that of copper cables. Because of the different nature of the conductor materials, it is necessary that the manufacturer must possess the core alloy technology alloy formulation for conductors, alloy smelting technology, material continuous casting and rolling production equipment and mature production processes. The chemical composition of the produced aluminum alloy rod material shall first meet the requirements of the chemical composition of the AA-8000 series aluminum alloy specified in the standards of ASTM B 800 05 (2011) and GB/T "Aluminum alloy wire for cable conductors". . Secondly, the mechanical properties are in line with the tensile strength of 98-159MPa, the post-break elongation rate is greater than or equal to 10%, the electrical properties are greater than or equal to 61%IACS, the material density is greater than or equal to 2.71g/cm3, and the material should pass 100 hours of compressive creep. test. All conductor materials that meet the above requirements are qualified conductor materials for the manufacture of aluminum alloy cables.
2. Compressive creep properties of conductor aluminum alloy rod materials
Aluminum alloy cable is a new type of conductor cable invented because of frequent occurrence of safety accidents in cable applications caused by defects such as poor compressive creep resistance of aluminum cables. One of the major advantages and values ​​of aluminum alloy cables is that their compressive creep properties are much better than aluminum cables.
Conductor aluminum alloy material is excellent or not, compressive creep performance is an important assessment conditions, compressive creep properties directly reflect the value of aluminum alloy cable.
The proposed national aluminum alloy cable special standard "rated voltage 0.6/1kV aluminum alloy conductor XLPE insulated power cable" and GB/T "aluminum alloy conductor for cable conductors" clearly specify the conductor aluminum alloy compressive creep Variable performance tests must meet the 100-hour requirement. Some domestic manufacturers only passed the 20-hour compressive creep test, which is far from the 100-hour requirement of the new national standard, and it is difficult to reflect the true creep resistance of the conductor material.
To investigate whether the creep resistance of the conductor material is excellent, the change rate of the compressive creep curve can be directly observed. The larger the change rate, the worse the creep resistance.
Therefore, the third fact that users and related industry personnel must clearly understand is:
To evaluate the quality of aluminum alloy cables, the quality of conductor aluminum alloy rods should be examined first.
At present, the domestic conductor aluminum alloy material is superior in performance is the first in 2006 to bring the United States mature, advanced aluminum alloy cable technology into China's professional aluminum alloy manufacturer UMI Electric Corporation China factory made 3807mm2 casting aluminum electrical cast aluminum Alloy rod material. The excellent performance of its materials is currently impossible for all aluminum alloy rods rolled and rolled by 2400 mm2 aluminum alloy cable manufacturers in China.
Six, aluminum alloy cable life determinants
The people in the market are also advocating that the life of aluminum alloy cables is higher than that of copper cables for 10 years. What is the basis? What is better than the technology of copper manufacturing? What is better than the advanced manufacturing process of copper cables? Manufacturers simply can not say clearly, these manufacturers do not even say it can do it.
We all know that the service life of a cable is usually determined by the service life of the insulation. Increasing the service life of the insulation is the key to improving the service life of the cable.
The key production steps to solve the insulation life problem are the following three points. This is an advanced technology that is different from the copper cable manufacturing and is beneficial to greatly increase the service life of the insulation.
(1) The degree of insulation cross-linking; Aluminum alloy cable is superior to copper cable in that one of the qualified aluminum alloy cable is all cross-linked polyethylene insulation, the cable working temperature is 90 degrees. Due to the use of cross-linked polyethylene insulation, there is a problem of cross-linking. Regular professional aluminum alloy cable manufacturers should have a special insulated cross-linking chamber to ensure complete cross-linking of insulation.
(2) Stranded conductors; At present, the domestic stranded conductor equipment of aluminum alloy cable enterprises and copper cable companies are basically similar in the stranding technology and conductor stranding production equipment of conductors. The stranded conductors produced by such equipment usually produce aluminum chips and burrs, which damage the insulation, affect the insulation effect, cause safety hazards and shorten the insulation life. In China, the more advanced stranded conductor equipment is a semi-electrical, PLC-controlled nanotechnology conductor stranding equipment, using this advanced technology equipment, computer control production programming, innovative nanotechnology, production of aluminum alloy conductor The surface is free of aluminum swarf, no burr, no oil, no bumps, no scratches, no scratches, and can effectively ensure that the cable insulation does not have any damage and damage, ensuring that the service life of the product is much higher than similar products.
(3) Conductor cable toughening: Generally, the internal stress of the stranded conductor after conductor twisting will be exerted on the insulation, so that the insulation will be stressed for a long time, and the insulation ageing will be accelerated, which will affect the service life of the insulation, thus directly affecting the service life of the cable. This is one of the main reasons for the short service life of copper cables. U.S. aluminum alloy cable production plants use conductors for cable toughening to solve internal stress problems. The cable toughening process technology can further improve the electrical and mechanical properties of the product, at the same time eliminate the internal stress generated during the conductor twisting process, and effectively guarantee the service life of the insulation. Therefore, whether the aluminum alloy cable manufacturing process adopts the cable-toughening process technology and whether the manufacturing plant has the conductor-cable-toughening equipment is critical for improving the insulation life of the cable.
Therefore, the fourth fact that users and related industry personnel must clearly understand is:
It is necessary to check whether the manufacturer has a special insulated cross-linking chamber and advanced technology. Whether or not the conductor is twisted adopts advanced nano-stranding technology and equipment protection, whether it adopts the cable-toughening process technology and equipment protection. A truly professional aluminum alloy cable manufacturer must possess these manufacturing technologies, processes, and equipment.
It is understood that currently in the domestic aluminum alloy cable industry, only U.S. UMI alloy cable branded stranded conductors from the United States use its unique, more advanced, motor-based, PLC-controlled nanotechnology equipment and nanotechnology processes. The brand also owns the above-mentioned other advanced technology and equipment.
Seventh, aluminum alloy cable unique advanced outfitting methods and equipment
One of the characteristics of aluminum alloy cables is the interlocking (chaining) armoring method of aluminum alloys. The technology of this armoring method is much better than that of copper cables, and the use effect of cables is also not comparable to that of copper cables. of. But also aluminum alloy belt interlock (chain) armoring, domestic aluminum alloy cable manufacturers outfitting equipment and production process there is a big gap.
At present, there are various equipments for aluminum alloy crucible production lines in China, such as imported ones, imported ones and imported ones. The status quo of domestic imported equipment is due to the lack of experience in the production of aluminum alloy cables and consideration of investment in equipment during equipment selection. It has not been able to select advanced equipment, or imported used equipment, or imported main equipment. In order to save investment, supporting tooling Molds and other solutions in the country, the result is not up to the performance of imported equipment. The products produced by such equipment have large peaks and poor bending performance. The structure between them is flawless. They cannot achieve the structure required by the US technical standards. The products have poor pressure resistance and are easily dislocated. As for imitation of imported technology, domestically produced equipment, due to immature technology, the production of armored products can be imagined. Because of these factors, domestic aluminum alloy cable manufacturers can not meet the requirements of U.S. technical standards.
At present, the United States UMI alloy cable brand originally imported from Canada, the world's most advanced KALMARK chain skid mounted machine production line, based on the United States technical standards developed by the aluminum chain with chain armored cable, peak density, bending performance, and The interlocking structure between the jaws is a structure that interlocks with each other to ensure that the cable withstands external strong external force damage. Even if the cable is subject to large external pressure and external impact, the armor layer can also protect the insulation. Layer electrical performance. The structure of the non-magnetic armored layer of aluminum alloy effectively improves the flame-retardant level of the cable, greatly reduces the damage to the cable caused by fire or fire, and greatly reduces the eddy current loss of the cable. It truly reflects the quality and style of authentic American alloy cables.
Therefore, the fifth fact that users and related industry personnel must clearly understand is:
It is necessary to understand the technical level and production process of the armoring equipment of aluminum alloy cable manufacturers. Whether the products are manufactured with peak-to-peak density and good bending performance, the structure between the é“ and 是 is a mutual hook.
Eight, three types of aluminum alloy cable test report
Reliance on previous inspection reports (one-vote veto nature report): Inspection report on "Conformity Determination of Aluminum Alloy Materials for Aluminum Alloy Cable Conduits and Copper-Aluminum Alloy Transition Terminal Blocks".
Before users purchase aluminum alloy cable products, they should first check whether the supplier brand can provide inspection reports issued by the national authoritative testing organization on the “Conformity Determination of Aluminum Alloy Materials for Aluminum Alloy Cable Conductors and Copper-Aluminum Alloy Transition Terminalsâ€. If the supplier brand is unable to provide the report, one type of brand can be rejected. Because the use of aluminum alloy cable products, if you do not support a dedicated aluminum alloy copper cable connector with the same performance, the advantages and value of the use of aluminum alloy cable can be said to have vanished, aluminum alloy cable can not guarantee safety, No hidden dangers. There is no special aluminum alloy copper connection terminal with the same performance as the aluminum alloy cable as the connection solution, so that the use of aluminum alloy cable is not as effective as the direct use of the aluminum cable. At least the user understands that he is using the aluminum cable, in the daily use and maintenance. At that time, the maintenance plan was more clear and the aluminum cables were cheaper.
The second type of test report (the key report that determines the quality of aluminum alloy cable conductors): "Full-performance test report for conductor aluminum alloy rods" and "Report on 100-hour compression creep test for conductor aluminum alloy rods".
See if the technology of an aluminum alloy cable brand is mature, but also determine whether it has AA-8000 series aluminum alloy in the production of authentic American standard ASTM B800 (R2011) and national standard GB/T "Aluminum conductor for cable conductor". Cable raw material conductor aluminum alloy rod capacity. Whether the performance of the conductor aluminum alloy rod produced by the company meets the requirements of ASTM B800 (R2011) and the national standard GB/T "Aluminum conductor for cable conductor" (chemical composition meets the requirements of AA-8000 grades. Mechanical properties Whether the tensile strength reaches 98-159Mpa and the post-failure elongation rate is greater than or equal to 10%. In the electrical properties, whether the conductivity is 61% IACS or more and the material density is greater than or equal to 2.71g/cm3). The compressive creep curve is comparable to the compressive creep curve of a copper conductor.
The raw material conductor of the aluminum alloy cable The quality of the aluminum alloy rod determines the quality of the aluminum alloy cable conductor. If the quality of the raw material conductor aluminum alloy rod is unacceptable or not excellent, the conductor of the aluminum alloy cable is difficult to be qualified and excellent, and the cable quality cannot be guaranteed. The user must understand whether the supplier has the ability to produce raw material conductor aluminum alloy rods and at the same time check whether the conductor aluminum alloy rods of the supplier have obtained the “Full-performance test report of conductor aluminum alloy rods†and “Conductor aluminum†issued by the national authoritative testing agency. Alloy rod 100 hour compression creep inspection report". These two reports can directly prove the quality of the conductor aluminium alloy raw material of the supplier. If the conductor aluminum alloy raw material fails, then the supplier can not produce a qualified aluminum alloy cable product. As for providing other so-called product inspection reports, there is no reference, and the value is proved.
The third type of test report: Type test report (integrated cable performance test) and commissioned test report (single performance test)
Under the premise of the above two types of reports, the user can check the third type of aluminum alloy cable type test report issued by the national authoritative testing agency. The cable type test report can reflect the overall performance of cable conductors, insulation, and jackets, and is a comprehensive test report of the overall performance of finished cables. It is a report that must be available for finished cable sales in the market. As for the individual performance tests such as flame-retardant, current-carrying capacity, fire-resistance, halogen-free and low-smoke, etc., they are generally commissioned by the manufacturer for inspection and are tested as required. When the user inspects this kind of test report, he should first check the supplier's cable type test report, which is a comprehensive report of cable performance. According to the individual performance requirements of the cable, the corresponding inspection report of the nature of the entrusted inspection shall be examined again.
Other so-called industry assessment reports that are widely publicized by many manufacturers or through what industry product identifications indicate and what century history has no research, cannot prove the quality and quality of aluminum alloy cable products actually produced by these manufacturers, and the manufacturers provide Is the connection solution correct?
As we all know, what the user needs and buys is the correct connection solution and qualified aluminum alloy cable product that can fully utilize the advantages and value of aluminum alloy cable and use the aluminum alloy cable safely and without any hidden danger, and achieve the result of safe energy transmission instead of what Unprepared publicity gimmicks.
Nine, choose the three major elements of aluminum alloy cable: a full set, quality, cost-effective
Aluminum alloy cable This new technology and new product from the United States is now in the Chinese market has been a great trend, but for the correct choice of aluminum alloy cable, safe, no hidden application of aluminum alloy cable, promote the aluminum alloy cable industry to science , the development direction of health, with our experience in applying aluminum alloy cable summary, share here with the industry and users as follows:
It is well known in the industry that in the application of aluminum alloy cables, the good quality of aluminum alloy cables is the basis, and the selection of matching aluminum alloy connector connection solutions that are consistent with the performance of the cables is the ultimate reflection of the application value of aluminum alloy cables. Therefore, when selecting an aluminum alloy cable, first select a supplier that has the full set of cables and accessory aluminum alloy connection accessories and provide the correct connection technology solution capability. The product quality is excellent and the overall cost performance is high. The price of the same level brand is then considered. difference.
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