Class 120 Polyvinyl Acetal Enamelled Rectangular Copper Wire

Polyvinyl acetal enamelled copper wire is an electrical wire consisting of a copper conductor coated with a layer of insulation made from polyvinyl acetal (PVF-2) enamel. It provides electrical insulation, protects against environmental factors, and is commonly used in applications such as motors, transformers, and inductors.

IEC 60317 Specification
This part of IEC 60317 specifies the requirements of enamelled recagular copper winding wire of class 120 with a sole coating based on polybinyl acetal resin, which may be modified providing it retains the chemical identity of the orginal resin and meets all specified wire requirements.

Class 120 is a thermal class that requires a minimum temperature index of 120 and h heat shock temperature of at least 155℃

The temperature in degree Celsius corresponding to the temperature index is not necessarily that t which it is recomended that the wire be operated and this will depend on many factors, including the type of equipment involved.

The range of nominal conductor dimensions covered by this standard is as follows;
–width; minimum 2.0m; maximum 16mm
–thickness; minimum 0.8mm, maximum 5.6mm
Wire of grade 1 and grade 1 are included in this specifcation and apply to the complete range of conductors.

Mandrel Winding Test
The coating shall show no crack after the wire has been bent flatwise and edgewise on a mandrel with a diameter as spexified in the form.

Mandrel Winding

Wire bent on  mandrel diameter
width sizes up to and including 10mm

sizes over 10mm

2✖ width

3✖ width

thickness  all dimensions 2✖thickness

Stretching Test
The wire shall be streched by 20%
The distance of loss of adhesion shall be less than 1✖ width

Enamelled Rectangular Copper Wire

Name Enameled Rectangular Wire
Conductor Copper
Dimension Thickness(a): 0.3~10.0mm;Width:1.0~22mm
We can produce the Ultra-Flat Large Sizes wire
Thermal Class (℃) 120(Class E)
Insulation thickness Single, Heavy
Certificate UL
Packing 30kg ~150kg ply-wood spool (250*400 /250*500/ 250*600 / 250*730)
Application Transformer; motor;generator; modern instrument; welding machine and so on

Key Points of Polyvinyl Acetal Wire
Electrical Insulation; Thermal Stability; Dielectric Strength; Chemical Resistance; Mechanical Strength; Excellent Winding Characteristics; Wide Range of Sizes; Cost-Effective; Compatibility with Different Metals

Application Areas
Electrical Motors: It is employed for motor winding applications due to its excellent electrical insulation properties, high-temperature resistance, and efficient use of space with its rectangular shape.
Transformers: Transformers are vital components in power distribution and electrical systems. The wire’s high-temperature rating, electrical insulation properties, and space-efficient design make it suitable for transformer windings.
Coils and Inductors: These components are essential in electronics, telecommunications, and power supply systems. The wire’s rectangular shape allows for precise winding and space optimization.
Aerospace and Aviation: Class 120 PVAc enamelled rectangular copper wire is utilized in aerospace and aviation applications where lightweight and reliable electrical conductors are required. It finds use in aircraft electrical systems, avionics, and various onboard components.