Class 200 transformers typically use enameled square copper wire as the conductor material. Enameled square copper wire has a square cross-section as compared to normal round enameled copper wire, which is suitable for some specific application requirements.

Copper is an excellent conductive material with a high electrical conductivity. The superior conductivity of enameled square copper wire provides a low-resistance conductive path and ensures efficient current transfer. The wire surface of enameled square copper wire is coated with insulating varnish, and common insulating varnish materials include Polyurethane, Polyesterimide, and so on. The insulating layer effectively isolates the current between the wire and its surroundings, preventing safety issues such as short circuits and electric shocks.

Copper has good thermal conductivity and can conduct heat quickly. In transformers, enameled square copper wires can effectively dissipate heat to avoid damage to the transformer caused by overheating of the wire.

Copper has high corrosion resistance and can resist oxidation and other chemicals. This helps to increase the service life and reliability of enameled copper wire.


Enameled square copper wire is used in a variety of transformer applications, including power transformers, power distribution transformers, and electronic transformers. In transformers, enameled copper wire is commonly used to connect components such as main windings, secondary windings, coils and insulation to transmit power and signals.

Enameled square copper wire has a relatively large conductive area and is capable of carrying high currents. This makes it widely used in some high power transformers to meet the transformer's needs for transmitting and distributing electrical energy.

Enameled square copper wire is widely used in various transformers, including power transformers, power distribution transformers, electronic transformers and so on. In transformers, enameled square copper wire is mainly used for winding connection, coil making and signal transmission.