Overview
IEC 60317-71:2017 is an international standard published by the International Electrotechnical Commission (IEC) specifying particular types of winding wires. This part of the IEC 60317 series focuses on polyester glass-fibre wound, fused, and resin or varnish impregnated round copper wire. The wire can be either bare or enamelled, and is designed for high-temperature applications with a temperature index of 180°C.
This standard defines the requirements for manufacturing and testing polyester glass-fibre wound copper winding wire impregnated with resin, such as epoxy, polyester, or polyesterimide. The unique construction provides superior thermal and mechanical properties suitable for electrical windings used in motors, transformers, and other electrical devices.
Key Topics
- Winding Wire Type: Round copper wire, bare or enamelled, wound with polyester glass-fibre.
- Impregnating Agents: The wires are impregnated with fused resin or varnish based on epoxy, polyester, or polyesterimide resins to ensure temperature endurance.
- Temperature Index: Rated for continuous operation at 180°C, ideal for applications demanding high thermal stability.
- Polyester and Glass Fibre Composition: The fibre covering is a combination of high-grade polyester yarn and electrical-grade continuous-filament glass yarn. Polyester content by weight does not exceed 50%.
- Grades of Wire Thickness:
- PG1: One layer of polyester glass fibre or two layers of finer fibres.
- PG2: Two layers of polyester glass fibre.
- Testing Methods: Specifies test procedures including electrical resistance, elongation, flexibility, abrasion resistance, and breakdown voltage to ensure compliance with quality and performance standards.
- Heat Shock Test: Not applicable for this wire type; no heat shock temperature class can be established.
- Compliance and Safety: Ensures conformity to international standards to enhance reliability and safety in electrical equipment.
Applications
IEC 60317-71 winding wires are essential components in the manufacturing of a variety of electrical devices and equipment, including:
- Electric Motors: Suitable for motor windings requiring insulation that withstands elevated temperatures.
- Transformers: Used in transformer coils needing durable insulation and high dielectric strength.
- Generators and Alternators: Ideal for rotating electrical machines where thermal and mechanical stability is critical.
- Electrical Coils and Inductors: Provides stable insulation in inductive components exposed to high heat.
- Specialized Industrial Equipment: Used where precise insulation standards and high-temperature endurance are mandatory.
The standard supports manufacturers and designers in selecting winding wire that meets stringent electrical, mechanical, and thermal requirements, enhancing equipment lifespan and performance.
Related Standards
- IEC 60317 Series: Covers specifications for various types of winding wires beyond polyester glass-fibre covered wires.
- IEC 60851 Series: Relates to test methods for winding wires, complementing the specifications outlined in IEC 60317-71.
- IEC 60264 Series: Addresses packaging requirements for winding wires, ensuring proper handling and preservation.
- IEC 60317-0-10:2017: Provides general requirements for polyester glass-fibre wound fused, unvarnished, or resin or varnish impregnated copper winding wires.
- Related Impregnating Agent Standards: Standards governing the characteristics and performance of epoxy, polyester, and polyesterimide resins used in insulation.
These related standards provide a comprehensive framework for manufacturers to ensure quality, safety, and compatibility across various types of insulated winding wires.
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