IEC 60455-2:2015

Resin based reactive compounds used for electrical insulation - Part 2: Methods of test

IEC 60455-2:2015 specifies methods of test to be used for testing resin based reactive compounds, their components and cured compounds used for electrical insulation. This third edition cancels and replaces the second edition published in 1998. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- Introduction of test methods related to IEC 60455-3-8;
- Additional and updated test methods for resins. Keywords: resin based reactive compounds used for electrical insulation

Composés réactifs à base de résines utilisés comme isolants électriques - Partie 2: Méthodes d'essai

L'IEC 60455-2:2015 spécifie les méthodes d'essai à utiliser pour vérifier les composés réactifs à base de résines, leurs composants et les composés durcis, utilisés pour l'isolation électrique. Cette troisième édition annule et remplace la deuxième édition parue en 1998. Cette édition constitue une révision technique. La présente édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- Introduction des méthodes d'essai relatives à la norme IEC 60455-3-8;
- Des méthodes d'essai supplémentaires et mis à jour pour les résines. Mots clés: composés réactifs à base de résines utilisés pour l'isolation électrique

General Information

• Status: Published
• Publication Date: 24-Jun-2015
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 11.040.50 - Radiographic equipment
• ICS: 17.220.99 - Other standards related to electricity and magnetism
• ICS: 29.035.01 - Insulating materials in general
• Technical Committee: TC 15 - Solid electrical insulating materials
• Drafting Committee: WG 7 - TC 15/WG 7
• Current Stage: DELPUB - Deleted Publication
• Start Date: 22-Nov-2019
• Completion Date: 27-Jul-2023

Relations

• Revised: IEC 60455-2:2023 - Resin based reactive compounds used for electrical insulation - Part 2: Methods of test
• Effective Date: 05-Sep-2023
• Revises: IEC 60455-2:1998 - Resin based reactive compounds used for electrical insulation - Part 2: Methods of test
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60455-2 ®
Edition 3.0 2015-06
INTERNATIONAL
STANDARD
Resin based reactive compounds used for electrical insulation –
Part 2: Methods of test
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from

either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or

your local IEC member National Committee for further information.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]

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Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
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IEC 60455-2 ®
Edition 3.0 2015-06
INTERNATIONAL
STANDARD
Resin based reactive compounds used for electrical insulation –

Part 2: Methods of test
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.220.99; 29.035.01 ISBN 978-2-8322-2748-0

– 2 – IEC 60455-2:2015 © IEC 2015

CONTENTS
FOREWORD . 5

INTRODUCTION . 7

1 Scope . 8

2 Normative references. 8

3 Terms and definitions . 11

4 General notes on methods of test . 11

4.1 Preparation and conditioning . 11

4.2 Sequence of tests . 12
4.3 Test report . 12
5 Methods of test for reactive compounds and their components . 12
5.1 Flash point . 12
5.2 Density . 12
5.3 Viscosity . 12
5.4 Viscosity after storing at elevated temperature . 12
5.5 Content of volatile organic components . 13
5.6 Isothermal increase of viscosity (processing time) . 13
5.7 Shelf life . 13
5.8 Colour . 13
5.9 Softening temperature . 14
5.10 Ash content . 14
5.11 Filler content . 14
5.12 Chlorine content . 14
5.12.1 Total chlorine content of unsaturated polyesters and epoxide resins . 14
5.12.2 Inorganic chlorine content of epoxide resins and glycidyl esters . 14
5.12.3 Easily saponifiable chlorine content of epoxide resins and related
materials . 14
5.13 Tendency of cristallisation . 14
5.14 Epoxide equivalent of epoxide resins . 14
5.15 Content of isocyanate . 14
5.16 Water content (Karl Fischer method) . 14
5.17 Hydroxyl value . 15
5.17.1 Polyester resins . 15
5.17.2 Resins other than polyester . 15

5.18 Acid value of polyester resins . 15
5.19 Amount of double bonds of unsaturated polyester and acrylate resins . 15
5.20 Acid and acid-anhydride content of acid-anhydride hardeners . 15
5.21 Amine value . 15
5.22 Pot life . 15
5.22.1 General . 15
5.22.2 Resinous compounds for cable accessories . 15
5.23 Gel time . 16
5.23.1 Unsaturated polyester based compounds . 16
5.23.2 Phenolic resin based compounds . 16
5.23.3 Other compounds . 16
5.24 Exothermic temperature rise . 16
5.24.1 Unsaturated polyester based compounds . 16
5.24.2 Resinous compounds for cable accessories . 16

5.24.3 Other compounds . 17

5.25 Total volume shrinkage of epoxide and unsaturated polyester based

compounds . 17

5.26 Curing in presence of water . 17

5.26.1 General . 17

5.26.2 Apparatus and materials. 17

5.26.3 Pouring device . 18

5.26.4 Procedure . 18

5.26.5 Test report . 18

5.27 Determination of the degree of curing . 18

5.28 Curing in thick layer and emissions during curing . 18
5.28.1 General . 18
5.28.2 Equipment . 19
5.28.3 Test specimen . 19
5.28.4 Procedure . 19
6 Methods of test for cured reactive compounds . 20
6.1 General . 20
6.2 Test specimens . 20
6.2.1 General . 20
6.2.2 Preparation of the reactive compound . 20
6.2.3 Preparation of test specimens . 21
6.2.4 Type and number of test specimens . 21
6.3 Density . 21
6.4 Mechanical properties . 21
6.4.1 Tensile properties . 21
6.4.2 Compressive properties . 21
6.4.3 Flexural properties . 22
6.4.4 Impact strength . 22
6.4.5 Hardness . 22
6.5 Thermal properties . 22
6.5.1 Bond strength at elevated temperature . 22
6.5.2 Linear thermal expansion . 22
6.5.3 Thermal conductivity . 22
6.5.4 Glass transition . 23
6.5.5 Flammability . 23

6.5.6 Thermal shock . 23
6.5.7 Dry heat resistance of resins for cable accessories – Method of test . 23
6.5.8 Wet heat resistance of resins for cable accessories . 24
6.5.9 Loss of mass . 26
6.5.10 Temperature index . 27
6.6 Chemical properties . 27
6.6.1 Water absorption . 27
6.6.2 Effect of liquid chemicals . 28
6.6.3 Resistance to mould growth . 28
6.6.4 Water vapour permeability . 28
6.7 Electrical properties . 28
6.7.1 Effect of water immersion on volume resistivity . 28
6.7.2 Dielectric dissipation factor (tan δ) and relative permittivity (ε ) . 29
r
6.7.3 Breakdown voltage and electr
...

IEC 60455-2 ®
Edition 3.0 2015-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Resin based reactive compounds used for electrical insulation –
Part 2: Methods of test
Composés réactifs à base de résines utilisés comme isolants électriques –
Partie 2: Méthodes d’essai
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 15 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.

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The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

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IEC 60455-2 ®
Edition 3.0 2015-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Resin based reactive compounds used for electrical insulation –

Part 2: Methods of test
Composés réactifs à base de résines utilisés comme isolants électriques –

Partie 2: Méthodes d’essai
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.99; 29.035.01 ISBN 978-2-8322-3142-5

– 2 – IEC 60455-2:2015 © IEC 2015
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references. 8
3 Terms and definitions . 11
4 General notes on methods of test . 11
4.1 Preparation and conditioning . 11
4.2 Sequence of tests . 12
4.3 Test report . 12
5 Methods of test for reactive compounds and their components . 12
5.1 Flash point . 12
5.2 Density . 12
5.3 Viscosity . 12
5.4 Viscosity after storing at elevated temperature . 12
5.5 Content of volatile organic components . 13
5.6 Isothermal increase of viscosity (processing time) . 13
5.7 Shelf life . 13
5.8 Colour . 13
5.9 Softening temperature . 14
5.10 Ash content . 14
5.11 Filler content . 14
5.12 Chlorine content . 14
5.12.1 Total chlorine content of unsaturated polyesters and epoxide resins . 14
5.12.2 Inorganic chlorine content of epoxide resins and glycidyl esters . 14
5.12.3 Easily saponifiable chlorine content of epoxide resins and related
materials . 14
5.13 Tendency of cristallisation . 14
5.14 Epoxide equivalent of epoxide resins . 14
5.15 Content of isocyanate . 14
5.16 Water content (Karl Fischer method) . 14
5.17 Hydroxyl value . 15
5.17.1 Polyester resins . 15
5.17.2 Resins other than polyester . 15
5.18 Acid value of polyester resins . 15
5.19 Amount of double bonds of unsaturated polyester and acrylate resins . 15
5.20 Acid and acid-anhydride content of acid-anhydride hardeners . 15
5.21 Amine value . 15
5.22 Pot life . 15
5.22.1 General . 15
5.22.2 Resinous compounds for cable accessories . 15
5.23 Gel time . 16
5.23.1 Unsaturated polyester based compounds . 16
5.23.2 Phenolic resin based compounds . 16
5.23.3 Other compounds . 16
5.24 Exothermic temperature rise . 16
5.24.1 Unsaturated polyester based compounds . 16

5.24.2 Resinous compounds for cable accessories . 16
5.24.3 Other compounds . 17
5.25 Total volume shrinkage of epoxide and unsaturated polyester based
compounds . 17
5.26 Curing in presence of water . 17
5.26.1 General . 17
5.26.2 Apparatus and materials. 17
5.26.3 Pouring device . 18
5.26.4 Procedure . 18
5.26.5 Test report . 18
5.27 Determination of the degree of curing . 18
5.28 Curing in thick layer and emissions during curing . 18
5.28.1 General . 18
5.28.2 Equipment . 19
5.28.3 Test specimen . 19
5.28.4 Procedure . 19
6 Methods of test for cured reactive compounds . 20
6.1 General . 20
6.2 Test specimens . 20
6.2.1 General . 20
6.2.2 Preparation of the reactive compound . 20
6.2.3 Preparation of test specimens . 21
6.2.4 Type and number of test specimens . 21
6.3 Density .
...