Aluminum wire for transformers windings generally refers to insulated wires used to manufacture coils or windings in electrical products, so it is called winding wire.

Aluminum wire for transformers windings is necessary to meet the needs of a variety of application and manufacturing skills. The former includes its shape, specifications, ability to work at high temperatures for short and long periods of time, as well as withstanding severe oscillations and centrifugal forces at high speeds in some occasions, corona resistance and breakdown at high voltages, and electrical wires under special atmosphere Resistant to chemical corrosion, etc .; the latter includes the need to experience stretching, bending and abrasion during winding and embedding, as well as swelling and erosion during dipping and drying.


 
Aluminum wire for transformers windings can be classified according to their basic composition, conductive core and electrical insulation layer. Generally, it is divided into enameled wire, wrapped wire, enameled wound wire and inorganic insulated wire according to the insulating materials and manufacturing methods used for the electrical insulating layer.

Enamelled aluminum wire for transformers windings is coated with the corresponding paint solution on the conductor, and then made by solvent evaporation and curing and cooling of the paint film. Enameled wire can be divided into red polyester enameled wire, polyester imine enameled wire, polyamide imine enameled wire, polyimide enameled wire, polyester imine / polyamide imide enameled wire, corona resistant enameled wire, and oily Paint, acetal paint, polyurethane enameled wire, etc. Sometimes it is also classified according to the particularity of its use, such as self-adhesive enameled wire, refrigerant-resistant enameled wire, etc.
 
Fiber glass aluminum wire for transformers windings are important variety of winding wires. The cotton yarn and silk used in the early stage, called yarn covered wire and silk covered wire, were used in motors and electrical appliances. Due to the large insulation thickness and low heat resistance, most have been replaced by enameled wires. At that time, it was only used as a high-frequency winding wire. In the large and medium-sized winding wires, when the heat resistance level is high and the mechanical strength is large, the glass fiber covered wire is also used, and it is equipped with an appropriate adhesive lacquer during manufacturing.

The paper-covered wire still occupies the proper position in the wrapped wire. The electric wire is mainly used in oil-immersed transformers. The oil-paper insulation formed at this time has excellent dielectric function, low price and long life. In recent years, the film-wrapped wire has been sensitively developed, mainly including polyester film and polyimide film-wrapped wire.