This article is enough to read about aluminum alloy cables

 

Nowadays, aluminum alloy cable technology plays an increasingly important role in the implementation of the national "aluminum instead of copper" construction of a resource-saving society in the field of medium and low-voltage power distribution, and the aluminum alloy cable industry and market have entered a booming stage of development.

Aluminum alloy cable technology and origin

In 1946, after the end of the Second World War, the United States formulated the technical policy of "aluminum instead of copper" to cope with the shortage of copper resources.

However, by the 1960s, early installations of aluminum-core electrical wiring were experiencing frequent fires, basically due to connection failures.

The performance deficiencies of aluminum cables caused connection safety hazards to become more and more prominent, with complaints from the power sector and residents.

Later, with the development of alloy smelting technology, some metallurgical companies' R&D labs did a lot of research and finally developed a successful aluminum alloy for electricians.

In the continuing in-depth research, it was found that aluminum alloys have very excellent characteristics, such as greater strength, higher ductility, and better creep resistance.

Later, these aluminum alloys were listed in the 8000 series aluminum alloy catalog by the Aluminum Association of America.

Southern Wire and Cable Company (Southwire) invented the mainstream grade 8176 aluminum alloy in the 8000 series in 1968 through the development of aluminum alloy and made the mainstream 8176 aluminum alloy cable series in the North American market today.

Aluminum alloy cable and copper cable use the status of value and field

The same status of use

Cable manufacturing standard GB/T 3956-2008 "cable conductor" and the use of standards, namely the national industry standard JGJ 242-2011 "residential building electrical design code" and JGJ48-2014 "store building design code" promulgated by the Ministry of Housing and Construction have made it clear that aluminum alloy cables and copper cables have the same status of use.

The same use value

Aluminum alloy cable and copper cable except for conductor material are different, insulation, armoring method, and production technology are better than copper cable, and sheathing and other assessment conditions are the same as copper cable.

Aluminum alloy cable electrical performance by increasing the conductor cross-section and copper cable, mechanical properties better than copper. Both cables have the same use value.

Aluminum alloy cable quality determinants

Conductor aluminum alloy rod

The key to determining the quality of aluminum alloy cable is the qualified and excellent quality of its conductor material.

If the conductor aluminum alloy rod material is not qualified, the quality of the aluminum alloy cable can not be discussed.

The quality of the conductor aluminum alloy rod material determines the final quality of the manufactured aluminum alloy cable from objective conditions.

The production of aluminum alloy cable is different from that of copper cable because of the different nature of the conductor material, so the ZMS cable manufacturer has been owned by the conductor aluminum alloy core technology alloy formula, alloy melting technology, material continuous casting, and rolling production equipment and mature production process when producing aluminum alloy cable.

Compression creep resistance

Aluminum alloy cable is a new type of conductor cable invented due to the poor compression creep resistance and other defects of the aluminum cable causing frequent safety accidents in cable applications.

One of its main advantages and values is that the creep resistance is much better than aluminum cable.

The conductor aluminum alloy material is excellent or not, the creep resistance is the most important assessment condition, and the creep resistance directly reflects the value of aluminum alloy cable.

The key production links to solve the problem of cable insulation life are mainly the following three points, which are different from the advanced process of copper cable manufacturing, which is conducive to greatly improving the service life of insulation.

1 Insulation cross-linking degree

One of the points that aluminum cables are better than copper cables is that all qualified aluminum cables use cross-linked polyethylene insulation, and the working temperature of the cable is 90 degrees.

Because of the use of cross-linked polyethylene insulation, there is the problem of cross-linking degree, the regular professional aluminum alloy cable manufacturers should have a special insulation cross-linking room to ensure that the insulation is completely cross-linked.

2 Stranded conductor

Some aluminum alloy cable enterprises and copper cable enterprises' stranded conductor equipment is the same.

This equipment produces stranded conductors, which usually produce aluminum chips and burrs, damaging the insulation, affecting the insulation effect, causing safety hazards, and shortening the insulation life.

The most advanced stranded conductor equipment used in ZMS cable products is a sub-motor, PLC program-controlled nanotechnology conductor stranding equipment.

This advanced process equipment, microcomputer-controlled production programming, innovative top-notch nanotechnology, the production of aluminum alloy conductor surface without aluminum chips, burrs, oil, dents, scrapes, and scratches, can most effectively ensure that the cable insulation without any damage and destruction, to ensure that the product life is significantly higher than similar products.

3 Conductors into cable toughness

Usually, the internal stress existing in the stranded conductor after the conductor is stranded will be applied to the insulation, making the insulation under long-term stress, accelerating the insulation aging and affecting the service life of the insulation, thus directly affecting the service life of the cable, which is one of the main reasons why the service life of the copper cable is not long.

Therefore, whether the manufacturing process of aluminum alloy cable adopts cable toughening technology and whether the manufacturing plant has conductor cable toughening equipment, which is crucial to improve the insulation life of the cable.

 

It is well known in the cable industry that in the application of aluminum alloy cable, the good quality of the cable is always the basis, and the selection of a matching aluminum alloy connector connection solution with the same performance as the cable is the ultimate reflection of the value of the application of aluminum alloy cable. 

Therefore, when choosing an aluminum alloy cable, first choose a supplier with a full set of cables and supporting aluminum alloy connection accessories production, the ability to provide the right connection technology solutions, excellent product quality, and comprehensive cost performance, followed by consideration of the price difference between brands at the same level. ZMS Cable has a professional cable sales representative one-stop service to solve your cable selection problems.