EN 60455-3-1:2003

Resin based reactive compounds used for electrical insulation - Part 3: Specifications for individual materials - Sheet 1: Unfilled epoxy resinous compounds

Gives the requirements for unfilled epoxy resinous compounds in the cured form for classes EP-U-1 to EP-U-7.

Reaktionsharzmassen für die Elektroisolierung - Teil 3: Anforderungen an einzelne Werkstoffe - Blatt 1: Ungefüllte Epoxidharzmassen

Composés réactifs à base de résines utilisés comme isolants électriques - Partie 3: Spécifications pour matériaux particuliers - Feuille 1: Composés résineux époxydes sans charge

Contient les exigences pour les composés résineux époxydes sans charge à l'état durci ou polymérisé destinés aux catégories EP-U-1 à EP-U-7.

Reaktivne zmesi na osnovi smole, ki se uporabljajo za električno izolacijo - 3. del: Specifikacije za posamezne materiale - 1. list: Nepolnjene zmesi iz epoksidne smole (IEC 60455-3-1:2003)

General Information

• Status: Published
• Publication Date: 06-Jul-2003
• Withdrawal Date: 31-May-2006
• ICS: 29.035.01 - Insulating materials in general
• Technical Committee: CLC/SR 15 - Insulating materials
• Drafting Committee: IEC/TC 15 - IEC_TC_15
• Parallel Committee: IEC/SC 15C - IEC_SC_15C
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 07-Jul-2003
• Completion Date: 07-Jul-2003
• Ref Project: SIST EN 60455-3-1:2004 - Resin based reactive compounds used for electrical insulation -- Part 3: Specifications for individual materials -- Sheet 1: Unfilled epoxy resinous compounds

Relations

• Replaces: HD 307.3.1 S1:1986 - Specification for solventless polymerisable resinous compounds used for electrical insulation - Part 3: Specifications for individual materials - Sheet 1: Unfilled epoxy resinous compounds
• Effective Date: 28-Jan-2023
• Refers: EN 60455-2:1999 - Resin based reactive compounds used for electrical insulation - Part 2: Methods of test
• Effective Date: 03-Feb-2026
• Referred By: EN 60455-2:2015 - Resin based reactive compounds used for electrical insulation - Part 2: Methods of test
• Effective Date: 03-Feb-2026
• Referred By: EN IEC 60455-2:2023 - Resin based reactive compounds used for electrical insulation - Part 2: Methods of test
• Effective Date: 03-Feb-2026

Overview

EN 60455-3-1:2003, issued by CLC, specifies the requirements for unfilled epoxy resinous compounds used as electrical insulation. As part of the broader EN 60455 series, this standard addresses the distinct material specifications for unfilled epoxy resins in the cured form, classified under types EP-U-1 through EP-U-7. The document guides manufacturers, suppliers, and quality assurance teams seeking to ensure compliance with consistent quality and performance benchmarks for electrical insulating materials.

This standard is essential for the electrical and electronics industry, focusing on the reliable use of epoxy resins to deliver high-performance insulation in a range of devices and installations.

Key Topics

• Unfilled Epoxy Resinous Compounds: Focuses solely on epoxy compounds without added fillers, emphasizing their base characteristics.
• Material Classifications: Defines the classes EP-U-1 to EP-U-7, each with distinct property requirements in their cured state.
• Performance Requirements: Includes specifications for density, mechanical strength (flexural, tensile, and impact), thermal properties, electrical resistivity, dielectric properties, flammability, and water absorption.
• Test Methods: Refers to established test procedures outlined in EN 60455-2, ensuring reproducible and reliable results across the industry.
• Compliance and Quality: Standardized material requirements help manufacturers maintain quality and foster trust in product performance for safety-critical applications.

Applications

Unfilled epoxy resinous compounds, as defined in EN 60455-3-1, are vital for:

• Electrical Insulation: Used as primary insulating materials in transformers, switchgear, circuit boards, motors, and other electrical apparatus.
• Component Encapsulation: Protects sensitive electronics and electrical components from environmental factors such as moisture, dust, and chemicals.
• Industrial Manufacturing: Forms part of the production process for a wide array of electrical and electronic equipment where reliable insulation is critical.
• Infrastructure and Utility Systems: Applied in the construction and maintenance of power distribution systems, ensuring longevity and reliability.
• Automotive and Transportation Electronics: Used in electric vehicles and transportation control systems requiring rigorous electrical insulation.

These applications benefit from the superior electrical, mechanical, and chemical resistance properties of unfilled epoxy resins, promoting operational safety, durability, and reduced maintenance.

Related Standards

• EN 60455-1: Definitions and general requirements for resin-based reactive compounds used in electrical insulation.
• EN 60455-2: Methods of test for resin-based compounds used for electrical insulation, referenced for all testing within EN 60455-3-1.
• HD 307.3.1 S1:1986: Superseded by EN 60455-3-1, previously covering similar material requirements.
• IEC 60455-3-1: The international counterpart, ensuring harmonization across European and global markets.

These related standards provide comprehensive guidance, from terminology and test methods to material specifications, enabling consistent application and assessment across the industry.

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Keywords: EN 60455-3-1, unfilled epoxy resinous compounds, electrical insulation, resin-based reactive compounds, cured epoxy classes, electrical insulating materials, material specification, EN 60455 series, test methods, electrical equipment insulation.

Standards Content (Sample)

SLOVENSKI SIST EN 60455-3-1:2004

STANDARD
september 2004
Reaktivne zmesi na osnovi smole, ki se uporabljajo za električno izolacijo - 3.
del: Specifikacije za posamezne materiale - 1. list: Nepolnjene zmesi iz
epoksidne smole (IEC 60455-3-1:2003)
Resin based reactive compounds used for electrical insulation - Part 3:
Specifications for individual materials - Sheet 1: Unfilled epoxy resinous compounds
(IEC 60455-3-1:2003)
ICS 29.035.20 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD EN 60455-3-1
NORME EUROPÉENNE
EUROPÄISCHE NORM July 2003
ICS 29.035.01 Supersedes HD 307.3.1 S1:1986

English version
Resin based reactive compounds used for electrical insulation
Part 3: Specifications for individual materials
Sheet 1: Unfilled epoxy resinous compounds
(IEC 60455-3-1:2003)
Composés réactifs à base de résines Reaktionsharzmassen für die
utilisés comme isolants électriques Elektroisolierung
Partie 3: Spécifications pour matériaux Teil 3: Anforderungen an einzelne
particuliers Werkstoffe
Feuille 1: Composés résineux époxydes Blatt 1: Ungefüllte Epoxidharzmassen
sans charge (IEC 60455-3-1:2003)
(CEI 60455-3-1:2003)
This European Standard was approved by CENELEC on 2003-06-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60455-3-1:2003 E
Foreword
The text of document 15C/1461/FDIS, future edition 2 of IEC 60455-3-1, prepared by SC 15C,
Specifications, of IEC TC 15, Insulating materials, was submitted to the IEC-CENELEC parallel vote
and was approved by CENELEC as EN 60455-3-1 on 2003-06-01.

This European Standard replaces HD 307.3.1 S1:1986.

References to HD 307.2 S1:1986 have been updated to EN 60455-2:1999 and a new product,
EP-U-7, has been introduced.
The following dates were fixed:

– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2004-03-01

– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2006-06-01

Annexes designated "normative" are part of the body of the standard.
In this standard, annex ZA is normative.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60455-3-1:2003 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 60455-3-1:2003
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 60455-2 1998 Resin based reactive compounds used EN 60455-2 1999
for electrical insulation
Part 2: Methods of test
NORME CEI
INTERNATIONALE IEC
60455-3-1
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
2003-04
Composés réactifs à base de résines
utilisés comme isolants électriques –
Partie 3:
Spécifications pour matériaux particuliers –
Feuille 1:
Composés résineux époxydes sans charge
Resin based reactive compounds
used for electrical insulation –
Part 3:
Specifications for individual materials –
Sheet 1:
Unfilled epoxy resinous compounds
 IEC 2003 Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail]  Web: www.iec.ch
CODE PRIX
E
Commission Electrotechnique Internationale PRICE CODE
International Electrotechnical Commission
Международная Электротехническая Комиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

60455-3-1  IEC:2003 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
RESIN BASED REACTIVE COMPOUNDS USED
FOR ELECTRICAL INSULATION –
Part 3: Specifications for individual materials –
Sheet 1: Unfilled epoxy resinous compounds
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addit
...