How to judge the quality of aluminum alloy wire and cable

The cable industry to "aluminum alloy instead of copper" to build a resource-saving society, has gradually formed a social consensus, has been the Ministry of Industry and Information Technology, the Ministry of Housing and other management departments and one of the main users of the cable State Grid strongly support, the market has also been widely recognized and accepted aluminum alloy cable
。 The Ministry of Industry and Information Technology of the People's Republic of China has clearly upgraded "aluminum instead of copper" as a national strategy, determined to support the aluminum alloy cable industry into the national "Industrial Adjustment Guidance Catalog", the Ministry of Housing and Urban-Rural Development promulgated and implemented the national industry standard "Residential Building Electrical Design Code" in 2012 also clarified the same use status of aluminum alloy cable and copper cable, one of the main users of the cable State Grid has recently included aluminum alloy cable in the State Grid "2014 version of new technology catalog"
.

However, the manufacturing and inspection standards of aluminum alloy cables in China are not in place, and the quality of conductor materials is difficult to assess
.
This is one of
the main reasons for the large gap in the quality of aluminum alloy cable products due to the uneven conductor material on the market today.
The national industry standard "Electrical Design Code for Residential Buildings" issued by the Ministry of Housing and Urban-Rural Development, the national building standard design atlas "Aluminum Alloy Cable Laying and Installation" 10CD106 and other national guiding standards and specifications and provincial management departments such as the provincial housing and construction department have already had substantial guiding value
.

The key to determining the quality of aluminum alloy cable is whether the quality of its conductor material is qualified, if the conductor aluminum alloy rod material is unqualified, the quality of aluminum alloy cable cannot be discussed
.
The advantages and disadvantages of conductor aluminum alloy rod materials basically determine the final quality of the manufactured aluminum alloy cables from the objective conditions
.

Therefore, the basic judgment of the quality of aluminum alloy cable products is first to assess the quality
of the conductor aluminum alloy rod.
The production of aluminum alloy cable is different from the production method of copper cable, because the nature of the conductor material is different, so the manufacturer must have the conductor aluminum alloy core technology alloy formula, alloy smelting, material continuous casting and rolling production equipment and mature production technology
.
The chemical composition of the produced conductor aluminum alloy rod material should first meet the requirements
of AA-8000 series aluminum alloy chemical composition specified in the ASTMB80005 (2011) standard.
Secondly, the mechanical properties conform to the tensile strength of 103-152MPa, the elongation rate after breaking is greater than or equal to 10%, and the electrical properties conform to greater than or equal to 61% IACS
.
All conductor materials that meet the requirements of the above regulations are qualified conductor materials
for manufacturing aluminum alloy cables.

At present, the most excellent performance of domestic conductor aluminum alloy materials is the 3807mm2 billet aluminum alloy rod material manufactured by the Chinese factory of UMI Electric Company in China, which took the lead in bringing mature and advanced aluminum alloy cable technology from the United States to China in 2006
.
Its excellent material properties are currently unmatched by all aluminum alloy manufacturers in China with 2400mm2 billet casting and rolling aluminum alloy rod materials
.
For example, the comparison of material performance with manufacturers of also American brands can be seen
.

Aluminum alloy cable is a new type of conductor cable invented due to defects such as poor compressive creep performance of aluminum cable, resulting in frequent safety accidents in cable
applications.
One of the main advantages and values of aluminum alloy cable is that the compressive creep resistance is much better than that of aluminum cable
.