EN IEC 60664-1:2020

Insulation coordination for equipment within low-voltage supply systems - Part 1: Principles, requirements and tests

IEC 60664-1:2020 deals with insulation coordination for equipment having a rated voltage up to AC 1 000 V or DC 1 500 V connected to low-voltage supply systems. This document applies to frequencies up to 30 kHz. It applies to equipment for use up to 2 000 m above sea level and provides guidance for use at higher altitudes. It provides requirements for technical committees to determine clearances, creepage distances and criteria for solid insulation. It includes methods of electrical testing with respect to insulation coordination. The minimum clearances specified in this document do not apply where ionized gases are present. Special requirements for such situations can be specified at the discretion of the relevant technical committee. This document does not deal with distances: – through liquid insulation; – through gases other than air; – through compressed air. This edition includes the following significant technical changes with respect to the previous edition:
update of the Scope, Clauses 2 and 3,
addition of 1 500 V DC into tables,
new structure for Clauses 4 and 5,
addition of Annex G with a flowchart for clearances,
addition of Annex H with a flowchart for creepage distances,
update of distances altitude correction in a new Table F.10.  It has the status of a basic safety publication in accordance with IEC Guide 104.

Isolationskoordination für Betriebsmittel in Niederspannungs-Stromversorgungssystemen - Teil 1: Grundsätze, Anforderungen und Prüfungen

Coordination de l'isolement des matériels dans les réseaux d'énergie électrique à basse tension - Partie 1: Principes, exigences et essais

L’IEC 60664-1:2020 traite de la coordination de l'isolement des matériels ayant une tension assignée allant jusqu’à 1 000 V en courant alternatif ou jusqu’à 1 500 V en courant continu connectés aux réseaux d’énergie électrique à basse tension. Le présent document s’applique aux fréquences jusqu’à 30 kHz inclus. NOTE 1 Les exigences de coordination de l’isolement des matériels dans les réseaux d’énergie électrique à basse tension dont les fréquences assignées sont supérieures à 30 kHz sont données dans l’IEC 60664-4. NOTE 2 Des tensions plus élevées peuvent exister dans les circuits internes des matériels. Il s'applique au matériel utilisé jusqu'à 2 000 m au-dessus du niveau de la mer, et fournit des recommandations pour l’utilisation à des altitudes plus élevées (Voir  REF _Ref452123764 \r \h \* MERGEFORMAT 5.2.3.4 08D0C9EA79F9BACE118C8200AA004BA90B02000000080000000E0000005F005200650066003400350032003100320033003700360034000000 ). Il définit les exigences permettant aux comités d’études de déterminer les distances d'isolement, les lignes de fuite et les critères pour l’isolation solide. Il comprend les méthodes d'essais diélectriques concernant la coordination de l'isolement. Les distances d'isolement minimales spécifiées dans le présent document ne s'appliquent pas en présence de gaz ionisés. Les exigences particulières dans de telles conditions peuvent être spécifiées, comme ils l'entendent, par les comités d'études compétents. Le présent document ne traite pas des distances: – à travers l'isolation liquide; – à travers les gaz autres que l'air; – à travers l'air comprimé. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
mise à jour du Domaine d’application et des Articles 2 et 3,
nouvelle structure pour les Articles 4 et 5,
ajout de 1 500 V en courant continu dans les tableaux dans Annexe B et F,
mise à jour de la correction de l’altitude des distances dans un nouveau Tableau F.10,
ajout d’une Annexe G avec un organigramme relatif aux distances d’isolement,
ajout d’une Annexe H avec un organigramme relatif aux lignes de fuite.  Elle a le statut d’une publication fondamentale de sécurité conformément au Guide 104 de l’IEC.

Koordinacija izolacije za opremo v okviru nizkonapetostnih sistemov - 1. del: Načela, zahteve in preskusi (IEC 60664-1:2020)

General Information

• Status: Published
• Publication Date: 23-Jul-2020
• ICS: 29.080 - Insulation
• ICS: 29.080.30 - Insulation systems
• Technical Committee: CLC/SR 109 - Insulation co-ordination for low-voltage equipment
• Drafting Committee: IEC/TC 109 - IEC_TC_109
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 24-Jul-2020
• Completion Date: 24-Jul-2020
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Directive: 2014/53/EU - Directive 2014/53/EU of The European Parliament and of the Council of 16 April 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment and repealing Directive 1999/5/EC
• Ref Project: SIST EN IEC 60664-1:2020 - Insulation coordination for equipment within low-voltage supply systems - Part 1: Principles, requirements and tests (IEC 60664-1:2020)

Relations

• Replaces: EN 60664-1:2007 - Insulation coordination for equipment within low-voltage systems - Part 1: Principles, requirements and tests
• Effective Date: 07-Jun-2022
• Amended By: EN IEC 60664-1:2020/prA1:2024 - Insulation coordination for equipment within low-voltage supply systems - Part 1: Principles, requirements and tests
• Effective Date: 13-Dec-2022
• Corrected By: EN IEC 60664-1:2020/AC:2020-12 - Insulation coordination for equipment within low-voltage supply systems - Part 1: Principles, requirements and tests
• Effective Date: 10-Nov-2020

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2020
Nadomešča:
SIST EN 60664-1:2007
Koordinacija izolacije za opremo v okviru nizkonapetostnih sistemov - 1. del:
Načela, zahteve in preskusi (IEC 60664-1:2020)
Insulation coordination for equipment within low-voltage supply systems - Part 1:
Principles, requirements and tests (IEC 60664-1:2020)
Isolationskoordination für elektrische Betriebsmittel in Niederspannungsanlagen - Teil 1:
Grundsätze, Anforderungen und Prüfungen (IEC 60664-1:2020)
Coordination de l'isolement des matériels dans les réseaux d'énergie électrique à basse
tension - Partie 1: Principes, exigences et essais (IEC 60664-1:2020)
Ta slovenski standard je istoveten z: EN IEC 60664-1:2020
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 IEC 60664-1

NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2020
ICS 29.080.30 Supersedes EN 60664-1:2007 and all of its amendments
and corrigenda (if any)
English Version
Insulation coordination for equipment within low-voltage supply
systems - Part 1: Principles, requirements and tests
(IEC 60664-1:2020)
Coordination de l'isolement des matériels dans les réseaux Isolationskoordination für elektrische Betriebsmittel in
d'énergie électrique à basse tension - Partie 1: Principes, Niederspannungsanlagen - Teil 1: Grundsätze,
exigences et essais Anforderungen und Prüfungen
(IEC 60664-1:2020) (IEC 60664-1:2020)
This European Standard was approved by CENELEC on 2020-06-30. 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 60664-1:2020 E

European foreword
The text of document 109/183/FDIS, future edition 3 of IEC 60664-1, 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 IEC 60664-1:2020.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-03-30
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-06-30
document have to be withdrawn
This document supersedes EN 60664-1:2007 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 60664-1:2020 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 60038:2009 NOTE Harmonized as EN 60038:2011 (modified)
IEC 60216 (series) NOTE Harmonized as EN 60216 (series)
IEC 60068 (series) NOTE Harmonized as EN 60068 (series)
IEC 60068-1:2013 NOTE Harmonized as EN 60068-1:2014 (not modified)
IEC 60085:2007 NOTE Harmonized as EN 60085:2008 (not modified)
IEC 60112:2003 NOTE Harmonized as EN 60112:2003 (not modified)
IEC 60364-4-44:2007 NOTE Harmonized as HD 60364-4-442:2012 (modified)
IEC 60529 NOTE Harmonized as EN 60529
IEC 60664-3:2016 NOTE Harmonized as EN 60664-3:2017 (not modified)
IEC 60664-4:2005 NOTE Harmonized as EN 60664-4:2006 (not modified)
IEC 61000-4-5:2014 NOTE Harmonized as EN 61000-4-5:2014 (not modified)

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 60068-2-2 - Environmental testing - Part 2-2: Tests - EN 60068-2-2 -
Test B: Dry heat
IEC 60068-2-14 2009 Environmental testing - Part 2-14: Tests - EN 60068-2-14 2009
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 60270 - High-voltage test techniques - Partial EN 60270 -
discharge measurements
IEC 61140 2016 Protection against electric shock - EN 61140 2016
Common aspects for installation and
equipment
IEC 61180 2016 High-voltage test techniques for low- EN 61180 2016
voltage equipment - Definitions, test and
procedure requirements, test equipment

IEC 60664-1 ®
Edition 3.0 2020-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ

Insulation coordination for equipment within low-voltage supply systems –

Part 1: Principles, requirements and tests

Coordination de l’isolement des matériels dans les réseaux d’énergie électrique

à basse tension –
Partie 1: Principes, exigences et essais

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.080.30 ISBN 978-2-8322-8287-8

– 2 – IEC 60664-1:2020 © IEC 2020
CONTENTS
FOREWORD . 6
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and abbreviated terms . 9
3.1 Terms and definitions . 9
3.2 Abbreviated terms . 15
4 Basic technical characteristics for insulation coordination . 15
4.1 General . 15
4.2 Voltages . 16
4.2.1 General aspects . 16
4.2.2 Transient overvoltages . 17
4.2.3 Temporary overvoltages . 18
4.2.4 Recurring peak voltage . 18
4.2.5 Steady-state working voltage . 19
4.2.6 Steady-state peak voltage . 19
4.3 Overvoltage categories . 19
4.3.1 General . 19
4.3.2 Equipment energized directly from the mains supply . 19
4.3.3 Systems and equipment not energized directly from the mains supply . 20
4.4 Frequency . 20
4.4.1 General . 20
4.4.2 Solid insulation . 20
4.5 Pollution . 20
4.5.1 General . 20
4.5.2 Degrees of pollution in the micro-environment . 21
4.5.3 Conditions of conductive pollution. 21
4.6 Insulating material . 21
4.6.1 Solid insulation . 21
4.6.2 Stresses . 22
4.6.3 Comparative tracking index (CTI) . 23
4.7 Environmental aspects . 24
4.7.1 General . 24
4.7.2 Altitude . 24
4.7.3 Temperature . 24
4.7.4 Vibrations . 24
4.7.5 Humidity . 24
4.8 Duration of voltage stress . 24
4.9 Electrical field distribution . 25
5 Design for insulation coordination . 25
5.1 General . 25
5.1.1 Means of insulation coordination . 25
5.1.2 Frequency above 30 kHz . 25
5.1.3 Reduced distances due to coating or potting . 25
5.1.4 Equipment which are not connected to public low-voltage systems. . 25
5.2 Dimensioning of clearances . 25
5.2.1 General . 25

IEC 60664-1:2020 © IEC 2020 – 3 –
5.2.2 Dimensioning criteria for clearances . 26
5.2.3 Other factors involving clearances . 26
5.2.4 Dimensioning of clearances of functional insulation . 27
5.2.5 Dimensioning of clearances of basic insulation, supplementary
insulation and reinforced insulation . 27
5.3 Dimensioning of creepage distances . 28
5.3.1 General . 28
5.3.2 Dimensioning criteria of creepage distances . 29
5.3.3 Other factors involving creepage distances . 30
5.3.4 Dimensioning of creepage distances of functional insulation . 31
5.3.5 Dimensioning of creepage distances of basic insulation, supplementary
insulation and reinforced insulation . 31
5.4 Requirements for design of solid insulation .
...