[China Aluminum Network] brings advanced and mature aluminum alloy cable technology from North America to China. This advanced technology, which originated in the United States and has been successfully used in North America and other regions for decades, has made the people fresh and new and has opened up the hope that people in China can always develop. A type of conductor that can use aluminum resources has been pursued to pursue the dream of building a resource-saving society with "aluminum section copper". It has created a Chinese aluminum alloy cable business. With the gradual formation of the domestic aluminum alloy cable market, the industry is using the U.S. technology UMILOY alloy as a representative of a group of professional aluminum alloy cable brands. The advocacy of aluminum alloy cable to military quality is of higher quality, which effectively promoted the domestic aluminum alloy cable business. development of.
In the past few years, the aluminum alloy cable business in China has made remarkable progress. Aluminum alloy cable technology and products have been gradually accepted by domestic users. Nowadays, aluminum alloy cable technology is playing an increasingly important role in the practice of building a resource-saving society with aluminum and copper in the middle and low voltage distribution fields. The aluminum alloy cable industry and the market are also entering Flourishing stage.
However, at present, due to various human factors, the development of the aluminum alloy cable industry in China has objectively caused a lot of chaos affecting the healthy development of the industry. In addition, the market lacks scientific and systematic publicity and introduction to the aluminum alloy cables. Many questions and misunderstandings about the understanding of aluminum alloy cable technology and products by users and related industry personnel have affected the healthy development of the industry and the market. E.g:
1. The technical concept of various aluminum alloy cables emerges in an endless stream, and the application fields of the products are expanded. The low-voltage power distribution aluminum alloy cables used in the United States and other North American countries are based on the ASTM (American Society for Testing Materials) AA-8000 series conductor aluminum alloy specifications. The ASTM B800 and ASTM B801 standards are manufactured and manufactured. Low-voltage grade aluminum alloy conductor power cables are mainly used in construction and other applications (North America countries such as the United States do not have AA-8000 series aluminum alloy conductor for the production of 10KV voltage grade cable and cloth wire successful experience, but no specific use cases). This kind of new conductor cable invented by solving the problem of insufficient material performance and frequent occurrence of safety accidents in the aluminum conductor cable used for electric power transmission can only be popularized and applied in its applicable field.
The national conductor aluminum alloy and aluminum alloy cables are more important than the national standard GB/T30552-2014 "Aluminum alloy conductors for cable conductors" and the experts of the domestic aluminum alloy cable industry, such as U.S. technology, military product quality UMILOY brand technical director, etc. The national industry standard NB/T42051-2015 "The rated voltage of 0.6/1kV aluminum alloy conductor XLPE insulated power cable" promulgated on September 1st this year is mainly formulated with reference to ASTM B800 and ASTM B801 standards.
The North American AA-8000 series aluminum alloy cables in the United States, together with the aluminum alloy connectors with matching aluminum alloy cable performance, have created a successful history of safe and accident-free application of aluminum alloy cables for nearly 50 years.
According to various industry reports, the current domestic concept of aluminum alloy cables has emerged in an endless stream. Many manufacturers of rare earth, high-speed rail, high-conductivity aluminum alloy cables are flooding the market. Some manufacturers, without scientific demonstration and practical inspection, will intentionally use the AA-8000 series conductor aluminum alloy for the manufacture of cables with voltage ratings above 10KV and cloth cable applications. Therefore, the aluminum alloy cable manufactured in this way is unavoidable. Can it be equivalent to the successful application of aluminum alloy cables for several decades in North America such as the United States?
Second, the United States and other North American countries have created the fact that the successful application of aluminum alloy cable in the past 50 years of accident-free accidents AA-8000 series aluminum alloy cable in the past 50 years of successful application history, in fact, aluminum alloy cable and cable performance of the aluminum alloy connection Created under the joint action of this device, this aluminum alloy cable application connection solution is undoubtedly a scientific, correct and very successful experience.
It is understood that the current domestic aluminum alloy cable connection solutions use the wrong aluminum alloy cable + copper-aluminum transition terminal or other aluminum alloy terminal with inconsistent cable performance as a connection solution. The use of connectors such as copper-aluminum transition terminals originally used for aluminum cables and aluminum alloy connectors with inconsistent cable performance as the connection scheme will leave deadly safety hazards and will leave the advantages and the value of the aluminum alloy cables in vain. .
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 exist security risks, all aluminum defects are still there, then why is it necessary to use aluminum alloy cable ? What are the advantages and benefits of using aluminum alloy cables?
According to the data, in addition to the fatal potential safety hazards of copper-aluminum transitional connectors and non-conductor aluminum alloy connectors, the purity of aluminum in the various brands of copper-aluminum transition terminals used in the market can only reach 99.5%. : General electrical aluminum purity is more than 99.7%), and the production of copper and aluminum transition terminal aluminum, or industrial conductivity is relatively poor industrial aluminum, so the comprehensive conductivity of these copper and aluminum transition terminals can only be below 54% IACS (Note : Conductor aluminum alloy conductivity requirements above 61% IACS), which caused the terminal and aluminum alloy cable electrical performance does not match.
As for other aluminum alloy terminals whose performance is inconsistent with those of AA-8000 series conductor aluminum alloys, due to differences in the physical, mechanical, electrical, and compressive creep properties of the material and the properties of the AA-8000 conductor aluminum alloy, if such terminals are used Aluminum alloy cable connection will bring security problems and other issues it goes without saying.
Therefore, choosing the right aluminum alloy cable connection solution is the ultimate reflection of the application value of aluminum alloy cable. When users purchase and use aluminum alloy cables, the first problem is to choose the right connection solution. For example, the UMILOY brand of U.S. technology and military quality inherits the advanced connection technologies and successful experiences of North American countries such as the United States, and has first solved aluminum alloys in China. Cable connection problems, and to provide the majority of users of UMILOY correct aluminum alloy terminal connection solutions with cable performance, leading the industry's technological development.
Third, low-cost, shoddy so-called aluminum alloy cable floods the market, making users really difficult to distinguish.
Low-priced, shoddy aluminum alloy cable, either unqualified conductor material or aluminum cable. The low-cost, inferior aluminum alloy cable is not as good as the aluminum cable in electrical performance, and the mechanical performance is not up to the standard. The creep problem of the aluminum cable still exists. Even so, why buy aluminum alloy cable? It is better to buy aluminum cables, after all, the electrical performance of aluminum cables is still relatively high, and it is also cheap. In the past, because of the frequent occurrence of fire accidents and other accidents due to the use of aluminum cables, the use of copper cables was unavoidable. Nowadays, counterfeit and cheap aluminum alloy cables flooding the market are still unsolved. Even aluminum cables are not as good as they are. Fake and low-cost aluminum alloy cables will bring about safety accidents such as fire and human life.
Reminder to users and related personnel: Are you willing to risk the second half of your imprisonment and buy counterfeit and cheap aluminum alloy cables? Although it may sound a bit sensational, in the context of today's vigorous implementation of the tenured responsibility system for building safety, security issues arise from the use of fake and shoddy products. Then, construction, surveying, design, construction, supervision and other units and individuals involved are involved. It will be difficult to escape the culpability.
According to industry expert cost analysis, aluminum alloy cable products with a price below 60% of the national standard copper cable price on the market can basically be judged as fake and inferior aluminum alloy cable products. Consumers need to be careful.
Fourth, adhering to the advanced and sticking to the right path, the lack of scientific and systematic propaganda and introduction on aluminum alloy cables is a lack of scientific and systematic introduction on the current market. As a result, users and related industry personnel have many questions about the understanding of aluminum alloy cable technology and products. Misunderstanding, for this reason, we need to sort out the basic points of aluminum alloy cable technology and product application in order to facilitate the healthy development of the industry.
1. The origin of aluminum alloy cable technology and products In 1946 after the end of the Second World War, the United States formulated a technical policy of “cooperating aluminum with copper†in response to the shortage of copper resources. However, by the early 1960s, the aluminum cores were installed early. Frequent fires on electrical lines are basically caused by connection failures. 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 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.
In the fall of 1988, ASTM (American Society for Testing Materials) 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.
In the United States and other countries, the use of aluminum alloy cables for safety has been a success for several decades. It is the result of the joint action and supporting use of aluminum alloy cables and aluminum alloy connectors that have the same performance as the cables.
2, aluminum alloy cable connection solutions (application of aluminum alloy cable first question)
(A) Correct connection scheme for aluminum alloy cables (Achieving historical connection schemes for safe and accident-free use of aluminum alloy cables in North America and other countries in the past 50 years) That is, when aluminum alloy cables are connected, an aluminum alloy connector having the same performance as the cable must be used.
(B) Accidental Connection Scheme for Aluminum Alloy Cables At present, aluminum connectors such as copper-aluminum transition terminals originally used for aluminum cables and aluminum alloy connectors with inconsistent performance of cables are used as a connection scheme when aluminum alloy cables are connected at home. 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.
Therefore, to ensure that the advantages and value of aluminum alloy cable can be played and reflected, the premise of safety and non-hidden application of aluminum alloy cable is: the aluminum alloy cable that meets the standard requirements plus the supporting aluminum alloy connector with the same cable performance.
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.
3, choose the three major elements of aluminum alloy cable: a full set, quality, cost-effective industry is well known, aluminum alloy cable in the application, aluminum alloy cable is a good foundation, choose the matching aluminum cable connector with the same performance of the connection solution It is the root of the application of aluminum alloy cable. Therefore, when selecting aluminum alloy cables, first select a supplier that has full production of cables and supporting aluminum alloy connection accessories, has the ability to provide correct connection technology solutions, and has excellent product quality and comprehensive cost-effectiveness, and then consider the same level of brands. difference in price.
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