Overview
IEC 61061-3-1:1998 is an international standard published by the International Electrotechnical Commission (IEC). It specifies the technical requirements for non-impregnated densified laminated wood sheets produced specifically from beech veneer intended for electrical purposes. This standard is part of the IEC 61061 series, which deals with densified laminated wood materials used as electrical insulating materials. The standard provides detailed specifications for physical, mechanical, and electrical properties to ensure quality and safety in electrical applications.
The document builds upon the foundational definitions and general requirements laid out in IEC 61061-1, along with test methods detailed in IEC 61061-2. IEC 61061-3-1 focuses on individual material parameters for beech veneer laminated wood sheets, establishing strict requirements for manufacturing tolerance, mechanical strength, electrical properties, and moisture resistance to meet the needs of the electrotechnical industry.
Key Topics
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Material Scope and Definitions
Specifies non-impregnated laminated wood sheets produced from beech veneer as defined in IEC 61061-1.
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Mechanical Properties
- Flexural strength and apparent modulus of elasticity perpendicular to laminations
- Impact resistance and shearing strength to ensure durability and structural integrity
- Compressibility under a proof pressure of 20 MPa, with requirements on deformation recovery
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Electrical Characteristics
- Dielectric rigidity (electric strength) perpendicular to laminations
- Breakdown voltage parallel to laminations to guarantee reliable electrical insulation performance
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Physical Dimensions and Tolerances
- Thickness, length, width, and flatness, including precise tolerances for manufacturing consistency
- Shrinkage rates after drying in different directions
- Moisture content limits and oil absorption capacity
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Quality Assurance
- Testing methods and criteria outlined in IEC 61061-2 to verify compliance with specifications
- Limits on contamination by liquid dielectrics to maintain insulation effectiveness
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Part of a Series
This standard is Sheet 1 under Part 3 of IEC 61061, with related standards covering other material forms such as rings made from beech veneer (IEC 61061-3-2).
Applications
IEC 61061-3-1 certified laminated wood sheets find critical applications in electrical insulation systems where mechanical strength, electrical dielectric capability, and dimensional stability are essential. Typical uses include:
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Electrical Insulation Components
Utilized in manufacturing insulation parts for transformers, switchgear, and electrical machinery due to superior dielectric and mechanical properties.
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Electrotechnical Industrial Components
Suitable for creating insulating supports, barriers, and panels that must withstand electrical stresses and mechanical loads.
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High-Voltage Equipment
Employed in environments requiring material with precise dielectric strength and minimal moisture content to ensure performance safety and longevity.
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Custom Electrical Material Manufacturing
Helps manufacturers maintain quality control during production of non-impregnated densified laminated wood components from beech veneer.
Related Standards
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IEC 61061-1:1991 – Definitions, general requirements, and designation for non-impregnated densified laminated wood for electrical purposes. This standard provides the foundational terminology and overall specifications that IEC 61061-3-1 builds upon.
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IEC 61061-2:1992 – Test methods for evaluating mechanical, physical, and electrical properties of densified laminated woods. This standard outlines the testing procedures necessary to verify conformity with IEC 61061-3-1 requirements.
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IEC 61061-3-2: Non-impregnated densified laminated wood for electrical purposes – Part 3: Specifications for individual materials – Sheet 2
Specifies properties for sheets and rings formed from beech veneer, complementing the sheet specifications in IEC 61061-3-1.
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IEC 60050 – International Electrotechnical Vocabulary (IEV), providing standardized terminology used in the electrical and electronic fields referenced within IEC 61061-3-1.
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IEC 60027, IEC 60417, IEC 60617 – Standards defining letter and graphical symbols used widely in electrotechnical documentation consistency and clarity.
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