In North America, aluminum is the predominant choice of winding material for low-voltage, dry-type transformers larger than 15 kilovolt-amperes(kVA). In most other areas of the world, copper is the predominant winding material. The primary reason for choosing aluminum windings is its lower initial cost. Because there are many types, there are different classifications. According to the different conductor materials, there are the following types of enameled wires: pure copper enameled wire: a traditional type of enameled wire, with convenient welding, stable performance, and wide application, but its production cost will be relatively high; copper clad aluminum enameled wire: as pure copper enameled wire Substitutes have good high-frequency transmission performance, can be used in various high-frequency electromagnetic inductance coils, save production costs, and have good soldering performance, so they are used in various electronic coils, transformers, inductors, rectifiers, etc. aspect use. Aluminum enameled wire: Compared with copper-clad aluminum, it has a lower density, and the weight is 60% lower than that of copper wire, which can save the cost of production materials.
The cost of copper base metal has historically proven to be much more volatile than the cost of aluminum, so that the purchase price of copper conductor generally is the most expensive choice. Also, because aluminum has greater malleability and is easier to weld, it is the lower-cost manufacturing choice. However, reliable aluminum connections require more discipline and expertise on the part of transformer installers than that needed for copper connections.
Technical arguments about the pros and cons of aluminum vs. copper have been traded back and forth in the electrical industry for many years. Most of these arguments are inconsequential and some can be classified simply as misinformation. The purpose of this Application Brief is to discuss some common concerns regarding the choice between these two winding materials.
The above is the enameled wire of different conductors that we have introduced to you. Products such as enameled wire have the characteristics of stable physical properties, good metal workability, high strength and light specific gravity. Various performance indicators of the products have passed the testing and certification of national institutions, and are widely used in communications, military industry, aerospace, computers, electronic components, etc. In the high-tech field, as a conductor, it can be widely used in the production of coaxial cables, radio frequency cables, leaky cables, high-frequency signal transmission cables, power cables, high and low voltage distribution cabinets, switch cabinets, busbar rooms, transformers and other products.