Compared with copper wire, enameled aluminum wire is better?

Enameled aluminum wire is a main type of winding wire. It is composed of a conductor and an insulating layer. After the bare wire is softened by annealing, it is painted and baked many times. Compared with copper wire, enameled aluminum wire is better. In addition to the different cut-off amounts and materials of copper and aluminum wires, aluminum wires are relatively cheap. The aluminum wire is lighter. The mechanical strength of aluminum wire is poor. The aluminum wire is extremely easy to oxidize at the end of the connection wire. After the end of the connection wire is oxidized, the temperature will rise and the contact will be poor, which is a frequent point of failure (power failure or disconnection). However, the internal resistance of the copper wire is small. Aluminum wire has greater internal resistance than copper wire, but it dissipates heat faster than copper wire. 1 square aluminum wire can pass 1.5KW at 220V.

Among the common enameled aluminum wires, Rectangular Enameled Aluminum Wires are more commonly used on transformers.