EN IEC 60667-3-1:2020

Vulcanized fibre for electrical purposes - Part 3: Specifications for individual materials - Sheet 1: Flat sheets

IEC 60667-3-1: 2020 gives requirements for vulcanized fibre sheets for electrical purposes. Materials made by combining with an adhesive several thicknesses of vulcanized fibre are not covered by this document. Materials that conform to this specification meet established levels of performance. However, the selection of a material by a user for a specific application is based on the actual requirements necessary for adequate performance in that application and not based on this specification alone. Safety warning: it is the responsibility of the user of the methods contained or referred to in this document to ensure that they are used in a safe manner. This second edition cancels and replaces the first edition published in 1986. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
change to the range of thickness deviation in Table 1;
addition of apparent density in Table 1;
change to the range of thickness for tensile strength in Table 1;
addition of flexibility and shrinkage in Table 1;
change test method and property value of internal ply adhesion on Table 1.

Vulkanfiber für elektrotechnische Zwecke - Teil 3: Bestimmungen für einzelne Werkstoffe - Blatt 1: Flache Platten

Fibres vulcanisées à usages électriques - Partie 3: Spécifications pour matériaux individuels - Feuille 1: Feuilles planes

IEC 60667-3-1:2020 donne les exigences pour les feuilles en fibre vulcanisée à usages électriques. Les matériaux composites constitués de plusieurs couches de fibre vulcanisée assemblées par un adhésif ne sont pas couverts par le présent document. Les matériaux conformes à la présente spécification satisfont aux niveaux de performance établis. Cependant, le choix du matériau par un utilisateur pour une application spécifique est fondé sur les exigences réellement nécessaires pour une performance appropriée et non sur cette seule spécification. Mise en garde: il est de la responsabilité de l'utilisateur des méthodes contenues ou mentionnées dans le présent document de veiller à ce qu'elles soient utilisées de façon sécurisée. Cette deuxième édition annule et remplace la première édition parue en 1986. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
modification de la plage d'écarts par rapport à l'épaisseur dans le Tableau 1;
ajout de masse volumique apparente dans le Tableau 1;
modification de la plage d'épaisseur pour la résistance à la traction dans le Tableau 1;
ajout de flexibilité et stabilité dimensionnelle dans le Tableau 1;
modification de la méthode d'essai et de la valeur de propriété de l'adhérence interne du feuilletage dans le Tableau 1.

Vulkanizirana vlakna za električne namene - 3. del: Specifikacija za posamezne materiale - 1. list: Ravne plošče (IEC 60667-3-1:2020)

General Information

• Status: Published
• Publication Date: 21-May-2020
• ICS: 29.035.10 - Paper and board insulating materials
• Technical Committee: CLC/SR 15 - Insulating materials
• Drafting Committee: IEC/TC 15 - IEC_TC_15
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 22-May-2020
• Completion Date: 22-May-2020
• Ref Project: SIST EN IEC 60667-3-1:2020 - Vulcanized fibre for electrical purposes - Part 3: Specification for individual materials - Sheet 1: Flat sheets (IEC 60667-3-1:2020)

Relations

• Replaces: HD 416.3.1 S1:1988 - Specification for vulcanized fibre for electrical purposes - Part 3: Specifications for individual materials - Sheet 1: Flat sheets
• Effective Date: 03-Jul-2018

Overview

EN IEC 60667-3-1:2020 is a European standard that specifies the requirements for vulcanized fibre flat sheets used for electrical purposes. Developed under the International Electrotechnical Commission (IEC) framework and adopted by the European Committee for Electrotechnical Standardization (CENELEC), this document provides detailed specifications to ensure the consistent quality and performance of vulcanized fibre materials in electrical insulation applications.

This standard updates and replaces earlier editions, reflecting technical revisions such as changes in thickness deviation ranges, the addition of apparent density, flexibility, shrinkage, and revised test methods for internal ply adhesion. It excludes materials created by bonding multiple fibre thicknesses with adhesive. EN IEC 60667-3-1:2020 is essential for manufacturers, engineers, and quality controllers working with electrical insulating vulcanized fibre sheets to meet stringent industry criteria.

Key Topics

• Material Scope: Covers flat sheets of vulcanized fibre for electrical insulation; excludes laminated materials made by adhesives.
• Classification: Differentiates between general type and fishpaper type vulcanized fibre as per IEC 60667-1.
• Physical and Mechanical Properties: Includes specifications on thickness tolerance, apparent density, specific gravity, tensile strength (machine and cross directions), flexural strength, and electric strength.
• Durability Parameters: Addresses arc resistance, moisture content, chloride and ash content levels.
• Flexibility and Shrinkage: Establishes maximum limits to ensure material stability and suitability for electrical applications.
• Internal Ply Adhesion: Specifies minimum adhesion force requirements and outlines updated testing methods.
• Safety and Usage: Advises safe application of testing methods and reminds users that material selection should be based on specific performance needs, not on specification alone.

Applications

Vulcanized fibre sheets conforming to EN IEC 60667-3-1:2020 are widely used in electrical engineering and manufacturing due to their excellent insulating properties, mechanical strength, and durability. Typical applications include:

• Electrical Insulation Components: Used for insulating parts in transformers, motors, switchgear, and other electrical devices.
• High-Voltage Equipment: Provides reliable insulation where high dielectric strength is essential.
• Mechanical Supports and Spacers: Employed in assemblies requiring flexible but robust insulating materials.
• OEM Manufacturing: Important for producers of electrical parts where compliance with standardized material specifications is mandatory.
• Quality Control and Compliance: Enables consistent verification and testing during production to meet regulatory and safety standards.

Related Standards

EN IEC 60667-3-1:2020 is part of a comprehensive series dedicated to vulcanized fibre materials for electrical use, complementing the following:

• EN IEC 60667-1: Definitions and general requirements for vulcanized fibre in electrical applications.
• EN IEC 60667-2: Methods of test for evaluating physical, mechanical, and electrical characteristics of vulcanized fibre.

Together, these standards form an integrated framework supporting the effective selection, testing, and application of vulcanized fibre materials in the electrotechnical industry.

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Keywords: EN IEC 60667-3-1:2020, vulcanized fibre, electrical insulation, flat sheets, electrical purposes, material specifications, IEC standards, CENELEC, tensile strength, flexural strength, electric strength, arc resistance, electrical engineering materials, safety standards, insulating materials, fishpaper type, thickness tolerance, density, ply adhesion, shrinkage, moisture content.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2020
Nadomešča:
SIST HD 416.3.1 S1:1998
Vulkanizirana vlakna za električne namene - 3. del: Specifikacija za posamezne
materiale - 1. list: Ravne plošče (IEC 60667-3-1:2020)
Vulcanized fibre for electrical purposes - Part 3: Specification for individual materials -
Sheet 1: Flat sheets (IEC 60667-3-1:2020)
Vulkanfiber für elektrotechnische Zwecke – Teil 3: Bestimmung für einzelne Werkstoffe –
Blatt 1: Flache Platten (IEC 60667-3-1:2020)
Les fibres vulcanisées à usages électriques - Partie 3-1: Spécifications pour matériaux
individuels - Feuilles planes (IEC 60667-3-1:2020)
Ta slovenski standard je istoveten z: EN IEC 60667-3-1:2020
ICS:
29.035.10 Papirni in kartonski izolacijski Paper and board insulating
materiali materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60667-3-1

NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2020
ICS 29.035.10 Supersedes HD 416.3.1 S1:1988 and all of its
amendments and corrigenda (if any)
English Version
Vulcanized fibre for electrical purposes - Part 3: Specifications
for individual materials - Sheet 1: Flat sheets
(IEC 60667-3-1:2020)
Fibres vulcanisées à usages électriques - Partie 3: Vulkanfiber für elektrotechnische Zwecke - Teil 3:
Spécifications pour matériaux individuels - Feuille 1: Bestimmung für einzelne Werkstoffe - Blatt 1: Flache
Feuilles planes Platten
(IEC 60667-3-1:2020) (IEC 60667-3-1:2020)
This European Standard was approved by CENELEC on 2020-04-29. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60667-3-1:2020 E

European foreword
The text of document 15/880/CDV, future edition 2 of IEC 60667-3-1, prepared by IEC/TC 15 "Solid
electrical insulating materials" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 60667-3-1:2020.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-01-29
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-04-29
document have to be withdrawn
This document supersedes HD 416.3.1 S1:1988 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice
The text of the International Standard IEC 60667-3-1:2020 was approved by CENELEC as a
European Standard without any modification.

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60667-1 - Vulcanized fibre for electrical purposes - Part 1: - -
Definitions and general requirements
IEC 60667-2 — Vulcanized fibre for electrical purposes. Part 2: - -
Methods of test
To be published. Stage at the time of publication: IEC FDIS 60667-2:2019.
IEC 60667-3-1 ®
Edition 2.0 2020-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Vulcanized fibre for electrical purposes –

Part 3: Specifications for individual materials – Sheet 1: Flat sheets

Fibres vulcanisées à usages électriques –

Partie 3: Spécifications pour matériaux individuels – Feuille 1: Feuilles planes

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.035.10 ISBN 978-2-8322-8024-9

– 2 – IEC 60667-3-1:2020 © IEC 2020
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Classification . 6
5 Requirements . 7

Table 1 – Requirements . 8

IEC 60667-3-1:2020 © IEC 2020 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
VULCANIZED FIBRE FOR ELECTRICAL PURPOSES –

Part 3: Specifications for individual materials –
Sheet 1: Flat sheets
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the s
...