Aluminum alloy cable, I believe we are no stranger to this thing. Aluminum alloy power cable is AA8000 series of aluminum alloy for the conductor, the use of special roll forming wire stranding production process and annealing and other advanced technology to create a new type of material power cable. Alloy power cable to make up for the lack of the previous pure aluminum cable, although not improve the electrical conductivity of the cable, but the bending performance, creep resistance and corrosion resistance has greatly improved, to ensure that the cable overload and overheating to maintain continuity Stable performance.

 

But although set a lot of advantages in one of the aluminum alloy cable in China's market development is still difficult to move. Statistics show that China's wire and cable market, copper cable still accounts for more than 90% of the market share. For now, aluminum alloy cable industry as a whole is still in a downturn in the state. Comparison of foreign applications, as early as 1968, the United States began to develop and produce alloy power cables, and in the United States, Canada, Mexico and other countries began to promote the application. Mainly used in airports, military bases, office buildings, residential, hotels, supermarkets, institutions, stadiums, hospitals, factories and other construction projects.

 

Why in North America has 40 years of application history of aluminum alloy cable, since the introduction of China in 2006, nearly 10 years of development is still bumps? Which is a big problem is a security risk.

 

Aluminum alloy cable and copper cable is different from the connector in the cable, copper joint oxidation of copper oxide is a good conductor, can still protect the connector and the terminal electrical connection performance. The aluminum and aluminum alloy joints generated by the oxidation of alumina is the insulator, hard texture, strong bonding properties make it difficult to form a good conductive contacts, easy to cause contact heat. This is the cause of many of the use of aluminum alloy cable accident causes.

 

Aluminum alloy cable in the United States has just launched, also occurred in such accidents. The main reason is that there is no connector for aluminum core cable design, but the direct use of the copper cable connector, resulting in aluminum and socket or switch between the relaxation, micro-damage, starting arc, so that contact resistance increases Overheating and causing a fire.

 

In order to reverse this situation, the North American cable industry has improved from several aspects of cable products and connectors, taking the following measures.

 

In the material: the United States South, Canada Aluminum invented 8176,8030 and other 8000 series aluminum alloy, to enhance the creep performance;

 

In the wire connection: the use of a variety of ways to improve the connection performance, including the use of tin terminals, aluminum and copper terminals to add special gasket, the connection point coating antioxidants, design special socket;

 

In the standard: through the United States UL, and the US National Fire Safety Commission (NFPA) test, 1985, NEC Electric regulations in 2000V below some types of wire aluminum conductor should be used 8000 series aluminum alloy. In 1988, the American Society for Testing and Materials (ASTM) issued the B800 standard, the six brands of 8000 series aluminum alloy included in the cable conductor standard;

 

From the North American cable industry for aluminum alloy cable caused by the crisis remedial measures, we can find two key information: First, the cable application is the key lies in the cable and connector system performance; Second, the aluminum alloy cable industry standard is the basis for development The

 

The key to cable applications is the system performance between the cable and the connector

 

Aluminum alloy cable safety connection is the first prerequisite for the use of aluminum alloy cable performance consistent with the matching connection terminals, so the aluminum alloy cable manufacturers must be aware of this significant change in demand, in addition to the quality of aluminum alloy cable itself is stable, But also consider the user concerned about the connection security issues, but also follow the market demand changes, to provide safe and reliable connection program. North American security, the successful application of aluminum alloy cable for nearly 40 years, is due to the performance of aluminum alloy cable with the matching connection terminal specification solution protection.

 

Aluminum alloy cable industry standard is the basis for development

 

Fake aluminum alloy cable, or conductor material failure, or simply aluminum cable, or the production process is not mature. Shoddy aluminum alloy cable, its conductive performance is actually not as good as aluminum, aluminum cable creep problems still exist, the mechanical performance is not up to standard. This performance is not up to standard, quality does not fly the aluminum alloy cable is great Germany hindered the good development of this industry. So the industry standard is urgent need to improve. In this regard, the relevant industry practitioners actually made efforts. In the previous year in November, by the Machinery Industry Press and China Central Cable jointly organized the "aluminum alloy cable design and procurement manual", the aluminum alloy cable technology, standards, comprehensive consideration selection, procurement technical specifications, production supervision and Arrival acceptance and so on have provided an industry standard reference.

 

At present, in the cable market, there is still an unavoidable dispute between copper and aluminum, but the user has gradually matured, which also shows that the aluminum alloy cable market from the early promotion of the blank, difficult to cultivate, the mid-chaos clusters to now gradually reason.