Class 120 PolyvinyI acetal enamelled round copper wire

Polyvinyl acetal enamelled copper wire is a type of insulated wire where the conductor is coated with a layer of polyvinyl acetal enamel.

 

The "Class 120" designation refers to the thermal endurance of the wire, indicating that it can operate reliably at temperatures up to 120°C.

Polyvinyl acetal enamelled round copper wire, classified under Class 120, is a crucial material in the field of electrical engineering. This type of wire is renowned for its excellent insulation properties, durability, and ability to withstand high temperatures.

Class 120 is a thermal class that requires a minimum temperature index of 120 and a heat shock temperature of at least 155°C. The temperature in degrees Celsius corresponding to the temperature index is not necessarily that at which it is recommended that the wire be operated and this will depend on many factors, including the type of equipment involved.

 

Relevant Parameters

Thermal Class	120 (Class E)
Specification Range	Grade 1: 0.04 mm – 2.50 mm; Grade 2: 0.04 mm – 5.00 mm; Grade 3: 0.08 mm – 5.00 mm.
Insulation Materials	Polyvinyl acetal
Standards	IEC,GB/T,JIS,NEMA
lnsulation thickness	G1,G2,G3
Packing	PT-4-PT-200 or ply-wood spool

Specifications - IEC 60317

Reference standard lEC 60317 the requirements of enamelled round copper winding wires class 120 with a sole coating based on polyvinyl acetal or polyvinyl formal resin. It can be modified provided it retains the chemical identity of the original resin and meets all specified wire requirements.

The range of nominal conductor diameters covered by this document is:
Grade 1: 0,040 mm up to and including 2,500 mm;
Grade 2: 0,040 mm up to and including 5,000 mm;
Grade 3: 0,080 mm up to and including 5,000 mm.

 

1. Cut-through test：No failure shall occur within 2 min at 170°℃. Resistance to abrasion (nominal conductor diameters from 0,250 mm up to and including 2,500 mm).
2. Flexibility and adherence: Clause 8 of lEC 60317-0-1:2013 applies,where the constant K used for the calculation of thenumber of revolutions for the peel test shall be 175 mm.
3. Heat shock: Clause 9 of lEC 60317-0-1:2013 applies. The minimum heat shock temperature shall be155°℃.
4. Nominal conductor diameters up to and including 1,600 mm. The coating shall show no crack.
5. Resistance to abrasion (nominal conductor diameters from 0,250 mm up to and including 2,500 mm).