Overview

IEC 60317-70-2:2020 is an international standard from the International Electrotechnical Commission (IEC) that specifies requirements for polyester glass-fibre wound resin/varnish impregnated, bare or enamelled round copper winding wires with a temperature index of 155. These specialized winding wires are integral components in electrical equipment, particularly where thermal performance and mechanical strength are essential.

This standard covers both bare and enamelled copper wires, which are further reinforced with one or two layers of polyester glass-fibre and impregnated with resins such as epoxy, polyester, or polyesterimide. The wire sizes referenced in this standard are defined in IEC 60317-0-10:2017.

Key Topics

Material Composition:
- Wires may be bare or enamelled (grade 1 or grade 2).
- Reinforced with high-grade polyester and electrical-grade continuous-filament glass fibre.
- The impregnating resin provides additional protection and performance.
Temperature Rating:
- Designed for applications requiring a temperature index of 155, supporting operation in elevated temperature environments.
Product Grades:
- Multiple configurations possible: single or double fibre layers on bare or enamelled wires.
- Grades and layering specified ensure product versatility for various use cases.
Performance Requirements:
- Key performance aspects such as elongation, electrical resistance, springiness, flexibility, and breakdown voltage are referenced from IEC 60317-0-10:2017.
- Some tests, such as heat shock, are not applicable for this wire type due to the product’s construction.
Normative References:
- Uses IEC 60317-0-10:2017 for general requirements and dimensions.
- Supports consistent quality and interoperability within the industry.

Applications

The wires specified in IEC 60317-70-2:2020 are widely used in:

Transformers – Especially in high-reliability or high-temperature transformer winding applications, where insulation and thermal stability are crucial.
Motors and Generators – Suitable for windings requiring high mechanical strength and thermal endurance.
Chokes and Inductors – Used in inductor coils and chokes for electrical and electronic devices.
Power Electronics – Applicable in drives, converters, and other electrical equipment demanding robust winding wire insulation.

The combination of resin/varnish impregnation and glass-fibre winding provides enhanced dielectric properties, resistance to abrasion, and improved mechanical durability compared to conventional winding wires. These features make the product especially valuable in demanding environments.

Related Standards

A number of IEC standards are closely related to IEC 60317-70-2:2020 and support the broader framework of winding wire specification and testing:

IEC 60317 Series – Covers specifications for other types of winding wires, ensuring a wide selection for many electrical winding applications.
IEC 60317-0-10:2017 – General requirements and dimensions for polyester glass-fibre wound copper wires.
IEC 60851 Series – Defines test methods for winding wires, enabling reliable quality assurance and performance verification.
IEC 60264 Series – Specifies packaging of winding wires for safe transportation and storage.

Manufacturers, quality inspectors, and designers refer to these standards for ensuring compliance, material compatibility, and product performance in electrical equipment construction.

Keywords: IEC 60317-70-2:2020, polyester glass-fibre winding wire, resin impregnated wire, enamelled copper wire, temperature index 155, electrical insulation standard, electrical windings, transformer wire, IEC standards, winding wire applications.

Overview

Key Topics

Material Composition:
- Wires may be bare or enamelled (grade 1 or grade 2).
- Reinforced with high-grade polyester and electrical-grade continuous-filament glass fibre.
- The impregnating resin provides additional protection and performance.
Temperature Rating:
- Designed for applications requiring a temperature index of 155, supporting operation in elevated temperature environments.
Product Grades:
- Multiple configurations possible: single or double fibre layers on bare or enamelled wires.
- Grades and layering specified ensure product versatility for various use cases.
Performance Requirements:
- Key performance aspects such as elongation, electrical resistance, springiness, flexibility, and breakdown voltage are referenced from IEC 60317-0-10:2017.
- Some tests, such as heat shock, are not applicable for this wire type due to the product’s construction.
Normative References:
- Uses IEC 60317-0-10:2017 for general requirements and dimensions.
- Supports consistent quality and interoperability within the industry.

Applications

The wires specified in IEC 60317-70-2:2020 are widely used in:

Transformers – Especially in high-reliability or high-temperature transformer winding applications, where insulation and thermal stability are crucial.
Motors and Generators – Suitable for windings requiring high mechanical strength and thermal endurance.
Chokes and Inductors – Used in inductor coils and chokes for electrical and electronic devices.
Power Electronics – Applicable in drives, converters, and other electrical equipment demanding robust winding wire insulation.

Related Standards

A number of IEC standards are closely related to IEC 60317-70-2:2020 and support the broader framework of winding wire specification and testing:

IEC 60317 Series – Covers specifications for other types of winding wires, ensuring a wide selection for many electrical winding applications.
IEC 60317-0-10:2017 – General requirements and dimensions for polyester glass-fibre wound copper wires.
IEC 60851 Series – Defines test methods for winding wires, enabling reliable quality assurance and performance verification.
IEC 60264 Series – Specifies packaging of winding wires for safe transportation and storage.

Manufacturers, quality inspectors, and designers refer to these standards for ensuring compliance, material compatibility, and product performance in electrical equipment construction.

IEC 60317-70-2:2020 PDF

Technical details

Abstract

Overview

Key Topics

Applications

Related Standards

Related standards

Abstract

Overview

Key Topics

Applications

Related Standards

Related standards

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