At home, the market is generally accepted that aluminum alloy cable with copper, aluminum cable is a cable, so manufacturers and users in the business, when buying aluminum alloy cable basic or continue to use copper and aluminium cable thinking mode to understand and use aluminum alloy cable products. This is because, in effect, didn’t really know the character of aluminum alloy cable has caused by.
As for the cable conductor material:
Copper and aluminum cable conductor is a single metal material, the aluminum alloy cable conductor is based on the aluminum base material according to the requirements of aluminium alloy conductor formula to add a variety of other metal smelting and become a new type of alloy material.
Again from cable connection conditions for:
(1) : copper and aluminum cable products after decades of development, such as cable connection technology has been very mature, form a complete set of connection accessories and other products has formed a complete industrial and product supply chain, the application conditions are very perfect.
(2) : aluminum alloy cable for its conductor is aluminum alloy material, in addition to the U.S. authentic AA – 8000 series aluminum alloy conductor has six grades, and many domestic rare earth high iron, rare earth, high conductivity, such as aluminum alloy cable, cable manufacturers of aluminum alloy conductor material is different. Which leads to the connection technology of aluminum alloy cable and connection accessories products is hard to unify, consistent with aluminum alloy cable performance supporting domestic aluminum alloy connection accessories products also difficult to form industrial and product supply chain, and so that the market doesn’t buy aluminum alloy cable accessories products such as terminals form a complete set of special aluminum alloy. Can say at home, the application of aluminum alloy cable conditions remains to be mature.
Aluminum alloy cable connection application error status
Now at home, because of the aluminum alloy cable at the early stage of the promotion technology misleading, plus the domestic also not form a complete set of aluminum alloy cable connection accessories products industry and product supply chain, so that in the aluminum alloy cable connected applications are wrongly use original terminal for connecting cables of copper aluminium transition and some do not agree with aluminum alloy cable performance of so-called aluminum terminal for aluminum alloy cable connection.
And because the industry some of the so-called professional manufacturer of aluminum alloy cable are not professional, and a group of less professional production of copper at the same time also the production of aluminum alloy cable professional manufacturers are not serious to study aluminum alloy and copper, aluminum cable on the connection application, what is the essential difference between manufacturer for profit, users also clued-up, aluminum alloy cable in connecting the copper aluminum appeared on the application of transition terminals and do not agree with aluminum alloy cable conductor performance of terminal used to connect to the so-called aluminum alloy aluminum alloy cable mess.
It is well known that aluminium cable because of the physical, mechanical, compressive creep performance defect, easy to cause fatal safety concerns and was abandoned. Through technical progress, was born aluminum alloy cable. Now aluminum alloy cable connection and aluminum terminal as connection solution, all the defects in the aluminum, the safe hidden trouble is still there. So, the birth of the value of the aluminum alloy cable, what is the meaning? Value of our users to buy aluminum alloy cable? This kind of life and property safety to the user is responsible for the error of connection solution, recently has been the domestic numerous media widely revealed that this industry has been deliberately evades the question, finally.
Do not agree with aluminum alloy cable conductor performance several terminals of the fatal problem
(1), copper aluminum transfer terminal, because of the existence of terminal material of aluminum, the aluminum material compressive creep properties and elongation and tensile strength, the security problem of poor performance in the aluminum alloy cable transmission line is still there. Connect this terminal used for aluminum alloy cable, then cause the use of the advantages of aluminum alloy cable and value, so, the user it is better to use aluminium cable directly, because of the aluminium cable is more economic.
(2), copper aluminum transition terminals for the original is used to connect the cable to the terminal and terminal equipment installation size size does not match, not only increase the switching cost such as bronze, and the transfer bronze multi-channel switch, will also leave connection security hidden danger.
(3), the transition for copper and aluminum terminals and electrical terminal does not match, increase through the bronze and the contradiction that often produce cost, that is difficult to avoid this kind of problem cannot be solved, and the brutal construction such as abrasion terminal connection security hidden danger.
(4), copper aluminum transition terminals for the original is used to connect the cable to the terminal inside diameter does not match with the cable conductor diameter, must use special pressure tool, cause difficult to standardize the construction, connection security hidden danger.
(5), the use of various brands on the market at present copper aluminum transition terminals in the purity of aluminum is only 99.5%, the conductivity of 54% IACS industrial aluminum (note: general electrical aluminium purity over 99.7%, conductive rate above 61% IACS). So the comprehensive electrical conductivity of copper aluminum transition terminal only under 54% IACS (note: the conductivity of the aluminum alloy conductor in more than 61% IACS), the cable terminal and aluminum alloy electrical properties do not match, the result is transmission line resistivity increases more than 21%, line transmission capacity by 21% or increase the line losses of more than 21%.
(6) as for with aluminum alloy conductor is inconsistent with the performance of other aluminum terminal, because of its physical, mechanical, electrical, material properties, such as the compressive creep and AA – 8000 aluminium alloy conductor performance differences, if such a terminal used in aluminum alloy cable connection, the safe hidden trouble that will lead to problems such as is self-evident.
Achievement has aluminum alloy cable history correct application of the method
In the southern United States wire and cable company (Southwire) in 1968 invented the AA – 8000 series aluminum alloy conductor in the mainstream brand AA8176 aluminium alloy conductor, and made of aluminum alloy are widely used in the north American market now cable series products.
In 1970, the United States with electric cable company product related laboratory and connector manufacturing company, and other industry enterprise, started the assessment of aluminum alloy conductor connection solution. By electrical laboratory to scientific evaluation test of aluminium alloy conductor cable, connector manufacturing company successfully produced aluminum alloy cable dedicated consistent with aluminum alloy cable performance of new aluminum connectors. Through the strict test of the aluminium alloy conductor cable connection scheme, finally confirmed the AA – 8000 series aluminum alloy cable connection, you must use the same as the AA – 8000 aluminum alloy cable brand and consistent performance of AA – 8000 aluminum alloy connector solutions (for example: if a cable conductor to AA – 8176 type, the connection terminals of the aluminum alloy materials are the same as AA – 8176 grades, and performance). The connection solution began to widely used in construction and other fields use aluminum alloy conductor power cable, achievement for North America and other countries for nearly 50 years safety, no accident, the history of the successful application of aluminum alloy cable.
The United States the application of aluminum alloy cable products, from technological inventions to complementary connector technology and the improvement of the product, it took just two years.
Aluminum alloy cable must be used in connection with the aluminum alloy cable performance is consistent with the aluminum connector, the correct connection solution, in countries such as North America is already a standard connection solution.
So from the above example data can clearly understand that to guarantee the advantage and value of aluminum alloy cable and reflect, security, no application of aluminum alloy cable, used must be consistent with the aluminum alloy cable performance of aluminum alloy copper connector as connection solution.
Domestic aluminum alloy cable connection products supply chain challenges and difficulties
(1) the plight of connectivity products professional manufacturers, and helpless
At home, application of aluminum alloy cable products, it is objective existence connection technology and form a complete set of connection accessories production, and supply bottlenecks. Aluminum alloy cable products in the domestic also can only say that the new industry, the industry also belongs to the early stages of development and cable connection technology and products supporting industrial chain has yet to be formed.
The rapid formation of aluminum alloy cable industry chain, thanks to the connector manufacturing company close cooperation and strong support.
Domestic because aluminum alloy cable manufacturers use of aluminum alloy conductor of each are not identical (AA – 8000 series has six grades, there are many high-speed rare earth, rare earth, high conductivity, such as domestic aluminum alloy conductor, and North America only two brands such as the mainstream of AA – 8176), at present in domestic, professional connector manufacturers because of itself is not melting, casting large cross-section slab (at least 3700 was above) conductors of aluminium alloy rod continuous casting and rolling production line equipment and production capacity, so I can’t get to match the aluminum alloy cable conductor every brand, conform to the aluminum alloy cable electrical and mechanical properties, and can produce all kinds of connection terminal of aluminum alloy conductor rod, and terminal specification, aluminum alloy conductor brand, demand for various specifications of the terminal co., LTD., the cable manufacturer production of cable with different conductor compression degree different cable conductor diameter, terminal poor universality, caused in the production of terminal mold, manufacturing cost is high, and can’t provide the accessories for aluminum alloy cable manufacturers, cable used to connect to aluminum alloy and consistent with the cable performance of aluminum alloy terminals and other accessories products. And, even if the material can solve the problems such as, the terminals of the production cost is also cannot adapt to the market.
In a word, professional connector manufacturer cannot for aluminum alloy cable manufacturers can be with every manufacturer and aluminium alloy conductor brand performance matching aluminum alloy special copper connecting terminals.
At present in China, to solve the problem of consistent with aluminum alloy cable performance of aluminum alloy terminal, specialized terminals powerless is the objective facts, want to rely on specialized terminals form a complete set, supply special aluminum alloy cable connection terminal is simply impossible.
(2) to face a difficulty, but don’t astray
It is reported that some domestic cable manufacturer also contact the individual who once worked in a professional manufacturer of terminals, trying to solve the difficulties in research, development, production and supply aluminum terminal. In fact, the idea and practice is too unreliable. Imagine, even professional manufacturers can solve the problem, only by some personal ability, how to solve this problem? Also, the cable even real aluminum terminal? When can delivery? All don’t know, is not responsible for our commitment to users can form a complete set of aluminum alloy supply terminals. Urgent to promote the mood of the cable is understandable, but have to consider the reputation of manufacturer. Commitment to users, will do it, don’t again then transfers with copper and aluminum terminals or so-called aluminum terminal to cheat customers. In case of such ACTS, is also too fool users, man. To face a difficulty, but don’t astray.
In fact, the problem of special aluminum alloy aluminum alloy cable connection terminal, can only rely on the aluminum alloy cable manufacturers solve, rather than opportunistic, and pin their hopes on the practice of unreliable.
(3) aluminum alloy cable manufacturer of difficulties and challenges
But, generally lack of technical and financial strength of aluminum alloy cable manufacturers want to produce consistent with their own cable performance of aluminum alloy copper connecting terminals is actually more difficult.
The reason is: only on the current smelting, continuous casting and rolling equipment level and technical ability is unable to get consistent with their own cable performance, and moderate strength, density, good conductivity, and various technical indicators meet the requirements, and meet the production of various specifications terminals required size of the aluminium alloy rod.
According to the specialized study of aluminum alloy material expert introduction: only capable of melting, casting large cross-section slab (at least 3700 was; above) and can be large compression ratio continuous rolling, multichannel continuous sizing, rolling of aluminum alloy conductor rod continuous casting and rolling production line, is likely to get required qualified terminal production aluminium alloy rod.
According to the expert inside course of study: currently the only Asian American UMI alloy cable factories in China have rolling capacity of 3807 was; The conductor of aluminum alloy continuous casting and rolling production line, the other factory’s biggest rolling capacity was only 2400; The production line introduced (including Italy). Wheeling and only take if you want to get rod casting method, and without large compression ratio of rough rolling, multi-channel consecutive continuous pressure, rolling rod, due to the crystallization of rod material, density, strength and electric conductivity, various technical indicators can meet the requirements, such as rod, simply cannot be used in the manufacture of qualified aluminum alloy copper connecting terminals.
In addition to do not have access to high quality manufacturing and aluminum alloy cable properties consistent with aluminum alloy rod, the terminals of the manufacturing terminals also need to be able to complete the mold design, manufacturing, terminal of the friction welding of aluminum alloy parts with copper, terminal stamping shape, terminal intermediate anneal, nap, quality inspection and so on production machinery factory. Aluminum alloy cable manufacturers to set up a complete machinery factory production of terminals, this investment is a domestic cable manufacturer is hard to do it.
Although difficult objective existence, but for the real strength of the aluminum alloy cable manufacturers, as long as determined to accept the challenge, through increased investment in technology and capital, introduction of roll casting capacity of 3807 was; Above the conductor of aluminum alloy continuous casting and rolling production line equipment, to solve the problem of terminal access to production materials, coupled with entrust the way such as mechanical processing, believe these production terminals such as difficult or can be solved.
Aluminum alloy cable manufacturer’s way and opportunity
In view of the domestic application of aluminum alloy cable connection technology and the bottleneck problem of form a complete set of connectivity products, in 2006 into the mature technology of aluminum alloy cable, but at the end of 2012, has been gradually turned to the domestic market at the American enterprise product strategy UMI electrical companies in the United States after two years of technical research and development, released in September 2014 to obtain consistent with cable performance of the aluminum alloy connection terminal technology and product production breakthrough, the first became the only have the ability to provide a full range of aluminum alloy cable industry technology product solutions suppliers, for application of aluminum alloy cable safety, no hidden dangers, for the industry sustainable development, make new contribution.
But, in the aluminum alloy cable connection accessories industry chain has not yet formed, the industry only a supplier solution can provide a full range of technology products, is obviously not enough for the rapid development of the industry. American companies have got a good start, ability of enterprises should catch up, inside our industry, grasp this aspect of the research and development and equipment investment. In the special connection technology and product of form a complete set, in fact, industry have been waiting for eight years, wrong for eight years, we can wait, again wrong?
If, aluminum alloy cable manufacturer only have the basic capabilities of cable products, and industry did not form a complete set of aluminum alloy cable connection products industry, supply chain, production of aluminum alloy cable in the future how to promote, sales? Enterprise how to develop? Where is a way out? This is before every aluminum alloy cable manufacturer realistic and serious problem.
Early cables, year-end shopping season, many users chose to use aluminum alloy cable products. This can not help but let a person of, these users really understand aluminum alloy cable? Really don’t know when the application of aluminum alloy cable used must be consistent with the cable performance of aluminum alloy connector? Really don’t know not form a complete set with cable performance of aluminum alloy common use effect of the use of aluminum alloy cable connector is not as good as aluminium cable, not only difficult to reflect aluminum alloy cable real value, but will also leave a safe hidden trouble? Visible initial unscientific mislead, how serious the consequences would be. To industry sustainable development, we in addition to providing qualified aluminum alloy cable products to users, how to provide users with the right connection solutions?
On the basis of the current aluminum alloy cable connection accessory products difficult to form the objective reality of the industrial chain, market solutions and need the right connections, users have also been gradually understand and recognize the copper aluminum transition terminal and with the cable conductor performance of aluminum alloy connector, reoccupy error connection solution for the user, the user will accept them? Unless some adverse users willing to risk, form a dirty deal with you, leave your security hidden danger and became a sinner.
A road huashan since ancient times, the aluminum alloy cable manufacturer only identify industry present situation, study the successful experience of American UMI alloy cables, go the way of a full range of technical product solution provider. The initiative for the user is responsible for, in aluminum alloy cable products to provide customers with a full range of technology solutions.
Recently held in Shanghai from the electrical branch of China architectural society 2014 annual meeting of some of the electrical design field top experts and the industry know that some in the industry with strength and responsibility of enterprises, research institutes have been fully aware of the aluminum alloy cable connection technology and matching problems of connectivity products, is rushing to connect product technology pr and preparations for the introduction of large cross section of roll ability of continuous casting and rolling production line equipment, etc. Believe that over time, there will be results. If so, is the industry the Gospel. We sincerely look forward to the positive energy of enterprises and research institutions to achieve results as soon as possible, as soon as possible to join to the full set of technology solutions provider, promote the industry application conditions are ripe, contribute to the sustainable development of the industry.