Copper is an excellent electrical conductor with high electrical conductivity. This means that electrical copper wire conducts electrical current efficiently, reduces resistive losses, and provides lower temperature rise. High conductivity properties help improve transformer efficiency and energy conversion efficiency.

Electrical copper wire has good mechanical strength and flexibility and can withstand the current load and electromagnetic force when the transformer is operating. It is able to withstand the stress and vibration inside the transformer and maintain the reliability of the connection.

Although electrical copper wire itself is conductive, in transformers, winding wires and connecting wires often need to be insulated to avoid short circuits and insulation failures. Insulating materials such as insulating paint, insulating paper, insulating sleeves, etc. are often used for insulating electrical copper wires to provide good insulation properties.

Electrical copper wire is able to withstand the high temperature environment when the transformer is operating. Copper has a low temperature coefficient of resistance, which means that as temperature increases, the resistance of electrical copper wire increases more slowly, keeping resistive losses low.


When selecting and using electrical copper wires, refer to applicable standards and specifications, such as IEC, ANSI, etc. These standards specify the materials, dimensions, electrical properties, insulation requirements and test methods for electrical copper wire to ensure compliance with international and industry standards.

The wire diameter and cross-sectional area of the electrical copper wire need to be selected based on the transformer design and load requirements. A larger cross-sectional area can reduce resistive losses and heat generation, and improve the efficiency and load capacity of the transformer.

The surface of electrical copper wires is usually treated to remove oxides and other contaminants to ensure good contact performance and reliable connections.

Electrical copper wires play a key role in transformers. They provide an important foundation for current conduction, winding connections and energy conversion. Proper selection and use of compliant electrical copper wire is critical to ensuring the performance, reliability and safety of your transformer.