Overview
IEC 60317-8:2010 (consolidated with AMD1:2024) specifies requirements for polyesterimide enamelled round copper winding wire, class 180. It covers a sole coating based on polyesterimide resin (including permissible modified resins that retain the original chemical identity) and defines mechanical, electrical and thermal properties, test methods and acceptance criteria for winding wire intended for electrical equipment. This consolidated edition (IEC 60317-8:2010+AMD1:2024, edition 4.1) introduces updates such as appearance requirements, a reference to resistance to refrigerants test methods and pin hole test requirements.
Key topics and technical requirements
- Thermal class: Class 180 - minimum temperature index 180 and heat shock temperature ≥ 200 °C.
- Coating: Sole polyesterimide enamel; modified resins allowed if chemical identity retained and all wire requirements met.
- Conductor diameters (nominal):
- Grade 1: 0.018 mm to 3.150 mm
- Grade 2: 0.020 mm to 5.000 mm
- Grade 3: 0.250 mm to 1.600 mm
- Mechanical and electrical tests: dimensions, electrical resistance, elongation, springiness, flexibility/adherence (peel test constant K = 110 mm), heat shock, cut‑through, abrasion resistance (detailed force criteria by diameter), resistance to solvents, breakdown voltage (elevated temperature 180 °C), continuity of insulation, temperature index determination.
- New / amended requirements: appearance inspection criteria, pin hole test, new reference for resistance to refrigerants testing, and deletion of standalone high temperature failure requirements.
- Other properties: solderability, heat/solvent bonding, dielectric dissipation factor, resistance to transformer oil, mass loss and packaging requirements.
Applications and who uses this standard
- Manufacturers of enamelled copper wire use IEC 60317-8 to design, manufacture and certify polyesterimide‑coated winding wire.
- Motor, transformer, inductor and coil designers reference the standard when specifying insulation systems requiring class 180 thermal performance.
- Quality assurance and test laboratories apply the described test methods and acceptance criteria (appearance, pin hole, abrasion, heat shock, etc.).
- Procurement and compliance teams use the standard to verify supplier declarations and ensure materials meet internationally harmonized insulation requirements.
Related standards
- IEC 60317-0-1: General requirements for enamelled round copper wire (includes common test methods and definitions).
- IEC 60851-4: Methods of test for winding wires - chemical properties and related test procedures.
Keywords: IEC 60317-8, polyesterimide enamelled round copper wire, class 180, winding wire, temperature index, heat shock, pin hole test, resistance to refrigerants, winding wire standards.
Open preview (PDF)Specifications for particular types of winding wires - Part 8: Polyesterimide enamelled round copper wire, class 180
