IEC 60317-38:2013 PDF

Overview

IEC 60317-38:2013 (with Amendment 1:2024) specifies requirements for enamelled round copper winding wire, class 200, with a triple coating: an underlying polyester or polyesterimide resin, a secondary polyamide‑imide resin, and a third bonding layer (thermoplastic or thermosetting). The standard covers nominal conductor diameters Grade 1B and 2B: 0.050 mm to 1.600 mm and sets electrical, mechanical and thermal performance criteria for high‑temperature winding wire used in electrical equipment.

Key SEO terms: IEC 60317-38, enamelled round copper wire, class 200, polyesterimide, polyamide-imide, triple coating, bonding layer, winding wire standards.

Key topics and technical requirements

• Coating system: Triple coating - polyester or polyesterimide (base), polyamide‑imide (secondary), and a bonding top layer. Modified resins are permitted if they retain the original resin’s chemical identity and meet requirements.
• Thermal class: Class 200 requires a minimum temperature index of 200 and heat shock ≥ 220 °C. The temperature index is a material rating, not necessarily an operating recommendation.
• Dimensional & electrical tests: Conductor diameters, electrical resistance, continuity of insulation and breakdown voltage follow normative references to IEC 60317-0-1:2013.
• Mechanical & durability tests: Elongation, springiness, flexibility/adherence, cut‑through (no failure within 2 min at 320 °C), resistance to abrasion (specified by diameter), and resistance to solvents and transformer oil.
• Bonding and solderability: Heat bonding strength (helical and twisted coils) and solvent bonding methods; solderability and dielectric dissipation factor are specified.
• New/updated provisions: Amendment adds general notes on winding wire, clarifies normative references to IEC 60317‑0‑1:2013, and introduces Clause 23 - Pin hole test.
• Packaging: Requirements for supply and packaging are included.

Practical applications

• Designed for high‑temperature windings in: motors, transformers, inductors, solenoids, coils for power electronics, and other rotating and stationary electrical equipment.
• Especially relevant where thermal endurance, mechanical abrasion resistance and reliable bonding of windings are required (industrial, automotive, aerospace and power distribution equipment).

Who uses this standard

• Winding wire manufacturers and formulators (polyester/polyesterimide, polyamide‑imide coatings)
• Motor and transformer designers and OEMs specifying insulation systems
• Test and quality laboratories performing acceptance and type testing
• Procurement, compliance and certification teams ensuring material conformance

Related standards

• IEC 60317-0-1:2013 (General requirements for enamelled round copper wire) - normative reference for tests and dimensions
• IEC 60851 (Wire test methods) - complementary test procedures

Use IEC 60317-38 when specifying or qualifying class 200 enamelled copper winding wire with a bonding layer to ensure consistent, tested insulation performance in high‑temperature electrical windings.