IEC 60819-3-4:2013

Overview

IEC 60819-3-4:2013 is an international standard published by the International Electrotechnical Commission (IEC) that specifies requirements for non-cellulosic aramid fibre paper containing up to 50% mica particles used in electrical applications. This document is part of the IEC 60819 series, which addresses non-cellulosic papers designed for electrical insulation purposes. The standard particularly covers two types of aramid fibre paper with mica particles, designated as PAaM:

• Type 1: Calendered aramid paper containing mica particles
• Type 2: Uncalendered aramid paper containing mica particles

The 2013 edition represents a technical revision that updates thickness options and relevant performance values, ensuring materials conform to rigorous electrical and physical requirements.

Key Topics

Material Types and Composition

• Aramid fibre paper incorporated with mica particle content capped at 50% by mass.
• Two material process variants: calendered (Type 1) and uncalendered (Type 2), each with distinct density and moisture content limits.

Performance Requirements

• Moisture Content: Maximum 10.0% for Type 1; maximum 14.0% for Type 2.
• Thermal Classification: Minimum Relative Temperature Index (RTI) of 220°C based on long-term thermal aging.
• Electrical Properties: Dissipation factor not exceeding 0.1; permittivity of 4.5 ± 0.5 for Type 1 and 3.0 ± 0.5 for Type 2.
• Physical Properties: Apparent density of approximately 1.10 g/cm³ (±15%) for Type 1 and 0.4 g/cm³ (±15%) for Type 2.
• Mechanical strength parameters including tensile strength, elongation at break, and edge tearing resistance according to specific test conditions outlined in IEC 60819-2.

Testing and Compliance

• The standard references IEC 60819-1 for definitions and general requirements and IEC 60819-2 for methods of test.
• Physical and electrical properties are detailed with nominal and minimum/maximum limits for various thicknesses outlined in Table 1 of the standard.

Safety Notice

• Users must ensure safe and correct application of testing methods and material selection, tailored to the specific electrical insulation requirements of their use case.

Applications

IEC 60819-3-4:2013 aramid fibre paper containing mica particles is specialized for electrical insulation in high-performance electrical apparatus. Typical applications include:

• Insulation in transformers, motors, and generators, where high thermal resistance and dielectric strength are critical.
• Use in environments requiring excellent moisture resistance and mechanical durability under thermal stress.
• Electrical equipment manufacturing requiring customized insulating papers with balanced mica content for enhanced electrical and mechanical properties.
• Replacement or improvement over traditional cellulosic papers, particularly where higher temperature tolerance and reliability are necessary.

By adhering to IEC 60819-3-4 requirements, manufacturers and engineers ensure reliable dielectric insulation and maintain long-term operational stability of electrical devices.

Related Standards

IEC 60819-3-4:2013 forms part of the broader IEC 60819 series on non-cellulosic electrical papers:

• IEC 60819-1: Definitions and general requirements for non-cellulosic papers for electrical purposes.
• IEC 60819-2: Methods of testing electrical insulating papers, including procedures relevant for verifying compliance with IEC 60819-3-4.
• Other sheets in IEC 60819-3: Specifications for individual materials tailored for various compositions and performance criteria.

Users should consult these associated documents to fully understand terminology, testing methods, and performance context to optimize material selection and application.

Keywords: IEC 60819-3-4, aramid fibre paper, mica particles, non-cellulosic paper, electrical insulation, calendered aramid paper, uncalendered aramid paper, PAaM, electrical insulating materials, thermal classification, dielectric properties, electrical apparatus insulation.