EN 60664-3:2017

SLOVENSKI STANDARD
01-september-2017
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Insulation coordination for equipment within low-voltage systems - Part 3: Use of coating,
potting or moulding for protection against pollution (IEC 60664-3:2016)
Isolationskoordination für elektrische Betriebsmittel in Niederspannungsanlagen - Teil 3:
Anwendung von Beschichtungen, Eingießen oder Vergießen zum Schutz gegen
Verschmutzung (IEC 60664-3:2016)
Coordination de l'isolement des matériels dans les systèmes (réseaux) à basse tension -
Partie 3: Utilisation de revêtement, d'empotage ou de moulage pour la protection contre
la pollution (IEC 60664-3:2016)
Ta slovenski standard je istoveten z: EN 60664-3:2017
ICS:
29.080.30 Izolacijski sistemi Insulation systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 60664-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2017
ICS 29.080.30 Supersedes EN 60664-3:2003
English Version
Insulation coordination for equipment within low-voltage systems
- Part 3: Use of coating, potting or moulding for protection
against pollution
(IEC 60664-3:2016)
Coordination de l'isolement des matériels dans les Isolationskoordination für elektrische Betriebsmittel in
systèmes (réseaux) à basse tension - Partie 3: Utilisation Niederspannungsanlagen - Teil 3: Anwendung von
de revêtement, d'empotage ou de moulage pour la Beschichtungen, Eingießen oder Vergießen zum Schutz
protection contre la pollution gegen Verschmutzung
(IEC 60664-3:2016) (IEC 60664-3:2016)
This European Standard was approved by CENELEC on 2016-12-09. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, 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: Avenue Marnix 17, B-1000 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60664-3:2017 E
European foreword
The text of document 109/153/FDIS, future edition 3 of IEC 60664-3, prepared by IEC/TC 109
“Insulation co-ordination for low-voltage equipment" was submitted to the IEC-CENELEC parallel vote
and approved by CENELEC as EN 60664-3:2017.

The following dates are fixed:
(dop) 2017-12-16
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2020-06-16
standards conflicting with the
document have to be withdrawn
This document supersedes EN 60664-3:2003.

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.

This document has been prepared under a mandate given to CENELEC by the European Commission
and the European Free Trade Association.
Endorsement notice
The text of the International Standard IEC 60664-3:2016 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60194:2006 NOTE Harmonized as EN 60194:2006

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When 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 60068-2-1 -  Environmental testing -- Part 2-1: Tests - EN 60068-2-1 -
Test A: Cold
IEC 60068-2-2 -  Environmental testing -- Part 2-2: Tests - EN 60068-2-2 -
Test B: Dry heat
IEC 60068-2-14 -  Environmental testing -- Part 2-14: Tests - EN 60068-2-14 -
Test N: Change of temperature
IEC 60068-2-78 -  Environmental testing -- Part 2-78: Tests - EN 60068-2-78 -
Test Cab: Damp heat, steady state
IEC 60326-2 1990 Printed boards -- Part 2: Test methods - -
+ A1 2001  + A1 2001
IEC 60664-1 2007 Insulation coordination for equipment EN 60664-1 2007
within low-voltage systems -- Part 1:
Principles, requirements and tests
IEC 61189-2 2006 Test methods for electrical materials, EN 61189-2 2006
printed boards and other interconnection
structures and assemblies -- Part 2: Test
methods for materials for interconnection
structures
IEC 61189-3 2007 Test methods for electrical materials, EN 61189-3 2008
printed boards and other interconnection
structures and assemblies -- Part 3: Test
methods for interconnection structures
(printed boards)
IEC 61249-2 series Materials for printed boards and other EN 61249-2 series
interconnecting structures
IEC Guide 104 2010 The preparation of safety publications and - -
the use of basic safety publications and
group safety publications
ISO/IEC Guide 51 -  Safety aspects - Guidelines for their - -
inclusion in standards
IEC 60664-3 ®
Edition 3.0 2016-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ

Insulation coordination for equipment within low-voltage systems –

Part 3: Use of coating, potting or moulding for protection against pollution

Coordination de l'isolement des matériels dans les systèmes (réseaux) à basse

tension –
Partie 3: Utilisation de revêtement, d'empotage ou de moulage pour la protection

contre la pollution
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.080.30 ISBN 978-2-8322-3693-2

– 2 – IEC 60664-3:2016 © IEC 2016
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Design requirements . 9
4.1 Principles . 9
4.2 Application range with regards to the environment . 9
4.3 Requirements for the types of protection . 10
4.4 Dimensioning procedures . 10
5 Tests . 11
5.1 General . 11
5.2 Specimens for testing coatings . 11
5.3 Specimens for testing mouldings and potting . 12
5.4 Preparation of test specimens . 12
5.5 Visual examination . 12
5.6 Scratch-resistance test . 12
5.7 Conditioning of the test specimens . 13
5.7.1 General . 13
5.7.2 Cold conditioning . 13
5.7.3 Dry-heat conditioning . 13
5.7.4 Rapid change of temperature . 14
5.7.5 Damp heat, steady-state with polarizing voltage . 15
5.8 Mechanical and electrical tests after conditioning and electromigration . 15
5.8.1 General test conditions . 15
5.8.2 Adhesion of coating . 15
5.8.3 Insulation resistance between conductors . 16
5.8.4 Voltage test . 16
5.8.5 Partial discharge extinction voltage . 16
5.9 Additional tests . 16
5.9.1 General . 16
5.9.2 Resistance to soldering heat . 17
5.9.3 Flammability . 17
5.9.4 Solvent resistance . 17
Annex A (normative) Test sequences . 18
Annex B (normative) Decisions to be taken by the technical committees . 20
B.1 General . 20
B.2 Decisions required by technical committees . 20
B.3 Optional test conditions. 20
Annex C (normative) Printed wiring board for testing coatings . 21
C.1 General . 21
C.2 Specification of the printed wiring board. 21
C.3 Arrangement of the conductors . 21
C.4 Arrangement of lands . 22
C.5 Connections for the tests . 22
Bibliography . 25

IEC 60664-3:2016 © IEC 2016 – 3 –

Figure 1 – Scratch-resistance test for protecting layers . 13
Figure C.1 – Configuration of the test specimen . 23
Figure C.2 – Configuration of lands and adjacent conductors . 24

Table 1 – Minimum spacings for type 2 protection . 10
Table 2 – Dry-heat conditioning . 14
Table 3 – Degrees of severities for rapid change of temperature . 14
Table A.1 – Test sequence 1 .
...