Overview
IEC 60317-46:2013 from the International Electrotechnical Commission (IEC) sets out the requirements for aromatic polyimide enamelled round copper winding wire, classified under thermal class 240. This standard specifies performance characteristics for two grades of wire, outlining their application within a range of nominal conductor diameters as follows:
- Grade 1: 0.020 mm up to and including 2.000 mm
- Grade 2: 0.020 mm up to and including 5.000 mm
The main focus is on copper wire coated solely with aromatic polyimide resin. The document details essential specifications for electrical, thermal, and mechanical properties, establishing a reliable foundation for manufacturers, quality control, and end users. IEC 60317-46:2013 replaces the previous edition and introduces technical revisions to align with the latest industry practices.
Key Topics
The standard addresses the following core areas:
- Thermal Endurance: Definition of class 240 thermal performance, ensuring compatibility for high-temperature applications.
- Dimensions and Grades: Clear identification of nominal conductor diameters and their applicable tolerance classes.
- Electrical Resistance: Specification of acceptable resistance values for reliable electrical performance.
- Mechanical Properties: Verification of elongation, springiness, flexibility, and adherence to withstand handling and winding processes.
- Resistance to Heat and Chemicals: Minimum requirements for heat shock (minimum 260 °C), cut-through resistance (no failure within 2 min at 450 °C), solvent resistance, and abrasion.
- Insulation and Voltage Withstand: Elevated breakdown voltage requirements and methods for assessing continuity of insulation.
- Dielectric Dissipation Factor: Limiting tan δ values to ensure low loss at specified frequency.
- Surface Quality and Defect Testing: Appearance standards and pinhole testing to maintain insulation integrity.
Applications
Aromatic polyimide enamelled round copper winding wire per IEC 60317-46:2013 is essential in several demanding electrical and electronic environments, including:
- Industrial Motors: For high-efficiency and thermally stressed rotary equipment.
- Transformers: Where stable insulation at high temperatures safeguards against breakdowns.
- Generators and Alternators: Ensuring durability and operational safety in continuous-duty cycles.
- Automotive and Aerospace Electrical Systems: Where size constraints and extreme temperatures necessitate exceptional wire properties.
- Specialty Electrical Equipment: Such as instrumentation, relays, and magnetic coils that require high thermal resistance and robust physical performance.
Manufacturers, designers, and quality assurance teams rely on this standard to select and verify winding wire suitable for advanced applications, promoting product reliability and compliance with international norms.
Related Standards
To provide a comprehensive framework, IEC 60317-46:2013 is used in conjunction with complementary standards:
- IEC 60317-0-1:2013: General requirements for enamelled round copper wire, forming the baseline for all specific types covered by part 46.
- IEC 60264 Series: Guidelines for packaging of winding wires for safe transportation and storage.
- IEC 60851 Series: Test methods for winding wires, providing standardized procedures for verifying electrical and mechanical properties.
- Other Parts of IEC 60317: Specifications for different materials, wire shapes, and coating types.
For accurate selection, testing, and procurement, referencing the above standards ensures alignment with global best practices in winding wire application and quality assurance.