Characteristics and applications of four types of enameled wires(1)

1、Oil based enameled wire

Oil based enameled wire is the earliest enameled wire in the world, developed in the early 20th century. Its thermal level is 105. It has excellent moisture resistance, high-frequency resistance, and overload resistance. Under harsh conditions at high temperatures, the dielectric properties, adhesion, and elasticity of the paint film are all good.

Oily enameled wire is suitable for electrical and electrical products in general situations, such as ordinary instruments, relays, ballasts, etc. Due to the low mechanical strength of the paint film of this product, it is prone to scratches during the wire embedding process and is currently no longer produced or used.

2、 Acetal enameled wire

Acetal enameled wire paint was successfully developed and launched on the market by Hoochst Company in Germany and Shavinigen Company in the United States in the 1930s.

Its thermal levels are 105 and 120. Acetal enameled wire has good mechanical strength, adhesion, resistance to transformer oil, and good resistance to refrigerant. However, due to its poor moisture resistance and low softening breakdown temperature, this product is currently widely used in windings of oil-immersed transformers and oil-filled motors.

3、 Polyester enameled wire

Polyester enameled wire paint was produced by Dr. Beck in Germany in the 1950s

Successfully developed and launched into the market. The thermal grade of ordinary polyester enameled wire is 130, and the thermal grade of polyester enameled wire modified by THEIC is 155. Polyester enameled wire has high mechanical strength and good elasticity, scratch resistance, adhesion, electrical properties, and solvent resistance. It is widely used in various motors, electrical appliances, instruments, telecommunications equipment, and home appliance products.

4、 Polyurethane enameled wire

Polyurethane enameled wire paint was developed by Baer Company in Germany in the 1930s and launched on the market in the early 1950s. So far, the thermal levels of polyurethane enameled wires are 120, 130, 155, and 180. Among them, Class 120 and Class 130 are the most widely used, while Class 155 and Class 180 belong to high thermal grade polyurethane and are generally suitable for electrical appliances with high working temperature requirements.

Post time: Jun-15-2023