EN 60664-5:2007

SLOVENSKI STANDARD
01-februar-2008
1DGRPHãþD
SIST EN 60664-5:2004
Koordinacija izolacije za opremo v okviru nizkonapetostnih sistemov - 5. del:
Celovita metoda za ugotavljanje izolacijskih in plazilnih razdalj, velikih 2 mm ali
manj (IEC 60664-5:2007)
Insulation coordination for equipment within low-voltage systems - Part 5:
Comprehensive method for determining clearances and creepage distances equal to or
less than 2 mm
Isolationskoordination für elektrische Betriebsmittel in Niederspannungsanlagen - Teil 5:
Ein umfassendes Verfahren zur Bemessung der Luft- und Kriechstrecken für Abstände
gleich oder unter 2 mm
Coordination de l'isolement des matériels dans les systèmes (réseaux) à basse tension -
Partie 5: Méthode détaillée de détermination des distances d'isolement dans l'air et des
lignes de fuite inférieures ou égales à 2 mm
Ta slovenski standard je istoveten z: EN 60664-5:2007
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 60664-5
NORME EUROPÉENNE
October 2007
EUROPÄISCHE NORM
ICS 29.080.30 Supersedes EN 60664-5:2003

English version
Insulation coordination for equipment within low-voltage systems -
Part 5: Comprehensive method for determining clearances
and creepage distances equal to or less than 2 mm
(IEC 60664-5:2007)
Coordination de l'isolement des matériels Isolationskoordination
dans les systèmes (réseaux) für elektrische Betriebsmittel
à basse tension - in Niederspannungsanlagen -
Partie 5: Méthode détaillée Teil 5: Ein umfassendes Verfahren
de détermination des distances zur Bemessung der Luft- und
d'isolement dans l'air et des lignes Kriechstrecken für Abstände gleich
de fuite inférieures ou égales à 2 mm oder unter 2 mm
(CEI 60664-5:2007) (IEC 60664-5:2007)

This European Standard was approved by CENELEC on 2007-10-01. 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, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the 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

© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60664-5:2007 E
Foreword
The text of document 109/61/CDV, future edition 2 of IEC 60664-5, prepared by IEC TC 109, Insulation
co-ordination for low-voltage equipment, was submitted to the IEC-CENELEC parallel Unique Acceptance
Procedure and was approved by CENELEC as EN 60664-5 on 2007-10-01.
This European Standard supersedes EN 60664-5:2003.
The revision of Part 1 of EN 60664 also required a revision of Part 5 of EN 60664, as Part 5 is closely
linked to Part 1. In addition to a number of editorial improvements, the following major technical changes
made in Part 1 also apply for Part 5:
– amendment of Japanese mains conditions with regard to the rated impulse voltages, the rationalized
voltages and the nominal voltages of supply systems for different modes of overvoltage control;
– amendment of dimensioning of clearances smaller than 0,01 mm;
– alignment of the table and the corresponding formula regarding test voltages for verifying clearances
at different altitudes;
– amendment of interpolation of the creepage distance values for functional insulation;
– revision of the former Clause 4 "Tests and measurements" (now Clause 6) to achieve a more detailed
description of the tests and their purpose, the test equipment and possible alternatives.
This standard is to be used in conjunction with EN 60664-1.
NOTE  For the purposes of this standard, all references to EN 60664-1 are written as “to Part 1”. Where a subclause
is cited without reference to a part, it is assumed that the reference is to the current Part 5.
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) 2008-07-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2010-10-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60664-5:2007 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 60529 NOTE  Harmonized as EN 60529:1991 + A1:2000 (not modified).
+ A1
__________
- 3 - EN 60664-5:2007
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application 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  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Addition to Annex ZA of EN 60664-1:
Publication Year Title EN/HD Year

IEC 60364-5-51 2005 Electrical installations of building - - -
Part 5-51: Selection and erection of electrical
equipment - Common rules
IEC 60664-1 2007 Insulation coordination for equipment within EN 60664-1 2007
low-voltage systems -
Part 1: Principles, requirements and tests

IEC 60721-3-3 1994 Classification of environmental conditions - EN 60721-3-3 1995
Part 3: Classification of groups of
environmental parameters and
their severities -
Section 3: Stationary use at weatherprotected
locations
IEC 60721-3-7 1995 Classification of environmental conditions - EN 60721-3-7 1995
Part 3: Classification of groups of
environmental parameters and
their severities -
Section 7: Portable and non-stationary use

IEC 60721-3-9 1993 Classification of environmental conditions - EN 60721-3-9 1993
Part 3: Classification of groups of
environmental parameters and
their severities -
Section 9: Microclimates inside products

INTERNATIONAL IEC
STANDARD
CEI
60664-5
NORME
Second edition
INTERNATIONALE
Deuxième édition
2007-07
PUBLICATION FONDAMENTALE DE SÉCURITÉ
BASIC SAFETY PUBLICATION
Insulation coordination for equipment within
low-voltage systems –
Part 5:
Comprehensive method for determining
clearances and creepage distances equal to
or less than 2 mm
Coordination de l'isolement des matériels
dans les systèmes (réseaux) à basse tension –
Partie 5:
Méthode détaillée de détermination des distances
d’isolement dans l’air et des lignes de fuite
inférieures ou égales à 2 mm
PRICE CODE
X
CODE PRIX
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue
Pour prix, voir catalogue en vigueur

– 2 – 60664-5 © IEC:2007
CONTENTS
FOREWORD.4
INTRODUCTION.6

1 Scope and object .7
2 Normative references.7
3 Terms and definitions .8
4 Fundamentals of clearance and creepage distance dimensioning .8
4.1 Introductory remark .8
4.2 Basic principles .8
4.3 Voltages and voltage ratings .9
4.4 Frequency .11
4.5 Time under voltage stress.11
4.6 Pollution .11
4.7 Information supplied with the equipment .12
4.8 Insulating material .12
5 Requirements and dimensioning procedures .14
5.1 General .14
5.2 Dimensioning of clearances .14
5.3 Dimensioning of creepage distances .18
5.4 Requirements for design of solid insulation .23
6 Tests and measurements.26
6.1 Tests.26
6.2 Measurement of creepage distances and clearances.33

Annex A (informative) Dimensioning to maintain minimum insulation resistance.34
Annex B (normative) Water adsorption test.36
Annex C (informative) Dimensioning diagrams.40
Annex D (informative) Withstand voltage test for creepage distance under humid
conditions .43

Bibliography .44

Figure 1 – Test voltages.32
Figure B.1 – Layout of the test sample.37
Figure B.2 – Test circuit .38
Figure B.3 – Critical relative humidity of insulating materials .39
Figure C.1 – Diagram for dimensioning clearances for circuits directly connected to the
supply mains.40
Figure C.2 – Diagram for dimensioning clearances for circuits not directly connected to
the supply mains .41
Figure C.3 – Diagram for dimensioning of creepage distances .42
Figure D.1 – The arrangement for the withstand voltage test.43

60664-5 © IEC:2007 – 3 –
Table 1 – Relation between the humidity levels and macro-environmental classes .12
Table 2 – Clearances to withstand transient overvoltages .15
Table 3 – Clearances to withstand steady-state voltages, temporary overvoltages or
recurring peak voltages .16
Table 4 – Creepage distances to avoid failure due to tracking.20
Table 5 – Creepage distances to avoid flashover .21
Table A.1 – Minimum insulation resistance .34
Table A.2 – Creepage distances to maintain minimum insulation resistance.35

– 4 – 60664-5 © IEC:2007
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_____________
INSULATION COORDINATION FOR EQUIPMENT
WITHIN LOW-VOLTAGE SYSTEMS –
Part 5: Comprehensive method for determining clearances
and creepage distances equal to or less than 2 mm

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 intere
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