Low-voltage switchgear and controlgear assemblies - Part 1: General rules (IEC 61439-1:2020)

IEC 61439-1:2020 is available as IEC 61439-1:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61439-1:2020 lays down the general definitions and service conditions, construction requirements, technical characteristics and verification requirements for low-voltage switchgear and controlgear assemblies. NOTE Throughout this document, the term assembly(s) (see 3.1.1) is used for a low-voltage switchgear and controlgear assembly(s). For the purpose of determining assembly conformity, the requirements of the relevant part of the IEC 61439 series, Part 2 onwards, apply together with the cited requirements of this document. For assemblies not covered by Part 3 onward, Part 2 applies. This third edition cancels and replaces the second edition published in 2011. It constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) clarification that power electric converter systems, switch mode power supplies, uninterruptable power supplies and adjustable speed power drive systems are tested to their particular products standard, but when they are incorporated in assemblies the incorporation is in accordance with the IEC 61439 series of standards; b) introduction of a group rated current for circuits within a loaded assembly and the refocusing of temperature-rise verification on this new characteristic; c) addition of requirements in respect of DC; d) introduction of the concept of class I and class II assemblies regarding protection against electric shock.

Niederspannungs-Schaltgerätekombinationen - Teil 1: Allgemeine Festlegungen (IEC 61439-1:2020)

Ensembles d'appareillage à basse tension - Partie 1: Règles générales (IEC 61439-1:2020)

IEC 61439-1:2020 est disponible sous forme de IEC 61439-1:2020 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L’IEC 61439-1:2020 formule les définitions générales et les conditions d’emploi, les exigences de construction, les caractéristiques techniques et les exigences de vérification pour les ensembles d’appareillage à basse tension. NOTE Dans le présent document, le terme ensemble(s) (voir 3.1.1) est utilisé pour désigner un ou des ensembles d’appareillage à basse tension. Dans le but de déterminer la conformité de l’ensemble, les exigences de la partie applicable de la série IEC 61439 (à partir de la Partie 2), s’appliquent, de même que les exigences citées dans le présent document. Pour les ensembles non couverts par les parties à partir de la Partie 3, la Partie 2 s’applique. Cette troisième édition annule et remplace la deuxième édition parue en 2011. Elle constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) clarification du fait que les systèmes et matériels électroniques de conversion de puissance, les alimentations à découpage, les alimentations sans interruption et les systèmes d’entraînements électriques de puissance à vitesse variable sont soumis à essai conformément à leur propre norme de produit, mais que lorsqu’ils sont incorporés dans des ensembles, l’incorporation est conforme à la série de normes IEC 61439; b) introduction d’un courant assigné de groupe pour les circuits au sein d’un ensemble chargé et recentrage de la vérification de l’échauffement sur cette nouvelle caractéristique; c) ajout d’exigences relatives au courant continu; d) introduction du concept d’ensembles de classe I et de classe II en matière de protection contre les chocs électriques.

Sestavi nizkonapetostnih stikalnih in krmilnih naprav - 1. del: Splošna pravila (IEC 61439-1:2020)

General Information

Status
Published
Public Enquiry End Date
30-May-2019
Publication Date
07-Jun-2021
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
04-Jun-2021
Due Date
09-Aug-2021
Completion Date
08-Jun-2021

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SLOVENSKI STANDARD
SIST EN IEC 61439-1:2021
01-julij-2021
Nadomešča:
SIST EN 61439-1:2012

Sestavi nizkonapetostnih stikalnih in krmilnih naprav - 1. del: Splošna pravila (IEC

61439-1:2020)

Low-voltage switchgear and controlgear assemblies - Part 1: General rules (IEC 61439-

1:2020)
Niederspannungs-Schaltgerätekombinationen - Teil 1: Allgemeine Festlegungen (IEC
61439-1:2020)

Ensembles d'appareillage à basse tension - Partie 1: Règles générales (IEC 61439-

1:2020)
Ta slovenski standard je istoveten z: EN IEC 61439-1:2021
ICS:
29.130.20 Nizkonapetostne stikalne in Low voltage switchgear and
krmilne naprave controlgear
SIST EN IEC 61439-1:2021 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN IEC 61439-1:2021
---------------------- Page: 2 ----------------------
SIST EN IEC 61439-1:2021
EUROPEAN STANDARD EN IEC 61439-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2021
ICS 29.130.20 Supersedes EN 61439-1:2011 and all of its amendments
and corrigenda (if any)
English Version
Low-voltage switchgear and controlgear assemblies - Part 1:
General rules
(IEC 61439-1:2020)

Ensembles d'appareillage à basse tension - Partie 1: Niederspannungs-Schaltgerätekombinationen - Teil 1:

Règles générales Allgemeine Festlegungen
(IEC 61439-1:2020) (IEC 61439-1:2020)

This European Standard was approved by CENELEC on 2020-06-24. 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

© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 61439-1:2021 E
---------------------- Page: 3 ----------------------
SIST EN IEC 61439-1:2021
EN IEC 61439-1:2021 (E)
European foreword

The text of document 121B/99/FDIS, future edition 3 of IEC 61439-1, prepared by SC 121B "Low-

voltage switchgear and controlgear assemblies" of IEC/TC 121 "Switchgear and controlgear and their

assemblies for low voltage" was submitted to the IEC-CENELEC parallel vote and approved by

CENELEC as EN IEC 61439-1:2021.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2021-11-21

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2024-05-21

document have to be withdrawn

This document supersedes EN 61439-1:2011 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.

This document has been prepared under a mandate given to CENELEC by the European Commission

and the European Free Trade Association, and supports essential requirements of EU Directive(s).

For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of this

document.
Endorsement notice

The text of the International Standard IEC 61439-1:2020 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
IEC 60092 (series) NOTE Harmonized as EN 60092 (series)
IEC 60112:2003 NOTE Harmonized as EN 60112:2003 (not modified)
IEC 60112:2003/A1:2009 NOTE Harmonized as EN 60112:2003/A1:2009 (not modified)
IEC 60204 (series) NOTE Harmonized as EN 60204 (series)
IEC 60204-1:2016 NOTE Harmonized as EN 60204-1:2018
IEC 60216 (series) NOTE Harmonized as EN 60216 (series)
IEC 60228:2004 NOTE Harmonized as EN 60228:2005 (not modified)
IEC 60269-2 NOTE Harmonized as HD 60269-2
IEC 60364-4-44:2007 NOTE Harmonized as HD 60364-4-442:2012
IEC 60364-4-44:2007/A1:2015 NOTE Harmonized as HD 60364-4-443:2016
IEC 60364-5-54:2011 NOTE Harmonized as HD 60364-5-54:2011 (not modified)
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SIST EN IEC 61439-1:2021
EN IEC 61439-1:2021 (E)
IEC 60364-5-55:2011 NOTE Harmonized as HD 60364-5-559:2012
IEC 60664-1:2007 NOTE Harmonized as EN 60664-1:2007 (not modified)
IEC 60695-11-5:2016 NOTE Harmonized as EN 60695-11-5:2017 (not modified)
IEC 60721-3-3:2019 NOTE Harmonized as EN IEC 60721-3-3:2019 (not modified)
IEC 60947 (series) NOTE Harmonized as EN IEC 60947 (series)
IEC 60947-1:2020 NOTE Harmonized as EN IEC 60947-1:2021 (not modified)
IEC 60947-2 NOTE Harmonized as EN 60947-2
IEC 60947-7-2:2009 NOTE Harmonized as EN 60947-7-2:2009 (not modified)
IEC 61000-2-2:2002 NOTE Harmonized as EN 61000-2-2:2002 (not modified)

IEC 61000-2-2:2002/A1:2017 NOTE Harmonized as EN 61000-2-2:2002/A1:2017 (not modified)

IEC 61000-2-2:2002/A2:2018 NOTE Harmonized as EN 61000-2-2:2002/A2:2019 (not modified)

IEC 61000-4-13:2002 NOTE Harmonized as EN 61000-4-13:2002 (not modified)

IEC 61000-4-13:2002/A2:2015 NOTE Harmonized as EN 61000-4-13:2002/A2:2016 (not modified)

IEC 61000-6-1:2016 NOTE Harmonized as EN IEC 61000-6-1:2019 (not modified)
IEC 61000-6-2:2016 NOTE Harmonized as EN IEC 61000-6-2:2019 (not modified)
IEC 61000-6-3:2006 NOTE Harmonized as EN 61000-6-3:2007 (not modified)
IEC 61082 (series) NOTE Harmonized as EN 61082 (series)
IEC 61140:2016 NOTE Harmonized as EN 61140:2016 (not modified)
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SIST EN IEC 61439-1:2021
EN IEC 61439-1:2021 (E)
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 2007 Environmental testing – Part 2-2: Tests EN 60068-2-2 2007
– Test B: Dry heat
IEC 60068-2-11 1981 Basic environmental testing procedures EN 60068-2-11 1999
– Part 2-11: Tests – Test Ka: Salt mist
IEC 60068-2-30 2005 Environmental testing – Part 2-30: EN 60068-2-30 2005
Tests – Test Db: Damp heat, cyclic (12
h + 12 h cycle)
IEC 60073 2002 Basic and safety principles for man- EN 60073 2002
machine interface, marking and
identification – Coding principles for
indicators and actuators
IEC 60085 2007 Electrical insulation – Thermal EN 60085 2008
evaluation and designation
IEC 60364 (all parts) Low-voltage electrical installations HD 364 (all parts)
IEC 60364-4-41 2005 Low-voltage electrical installations – HD 364-4-41 2017
Part 4-41: Protection for safety –
(modified)
Protection against electric shock
+A1 2017 +A11 2017
+A12 2019
IEC 60364-4-44 2007 Low-voltage electrical installations – HD 60364-4-442 2012
Part 4-44: Protection for safety –
(modified)
Protection against voltage disturbances
+A1 2015 +HD 60364-4-444 2010
and electromagnetic disturbances
(modified)
+A2 2018 +HD 60364-4-443 2016
(modified)
IEC 60364-5-51 2005 Electrical installations of buildings – HD 60364-5-51 2009
Part 5-51: Selection and erection of
(modified)
electrical equipment – Common rules
+A11 2010
+A12 2017
---------------------- Page: 6 ----------------------
SIST EN IEC 61439-1:2021
EN IEC 61439-1:2021 (E)
Publication Year Title EN/HD Year
IEC 60364-5-52 2009 Low-voltage electrical installations – HD 60364-5-52 2011
Part 5-52: Selection and erection of
(modified)
electrical equipment – Wiring systems
+A11 2017
IEC 60364-5-53 2001 Electrical installations of buildings – - -
Part 5-53: Selection and erection of
+A1 2002
electrical equipment – Isolation,
+A2 2015 switching and control
IEC 60439 (all parts) Low-voltage switchgear and EN 60439 (all parts)
controlgear assemblies
IEC 60445 2017 Basic and safety principles for man- EN 60445 2017
machine interface, marking and
identification – Identification of
equipment terminals, conductor
terminations and conductors
IEC 60447 2004 Basic and safety principles for man- EN 60447 2004
machine interface, marking and
identification – Actuating principles
IEC 60529 1989 Degrees of protection provided by EN 60529 1991
enclosures (IP Code)
+A1 1999 +A1 2000
+A2 2013 +A2 2013
IEC 60664-1 2007 Insulation coordination for equipment EN 60664-1 2007
within low-voltage systems – Part 1:
Principles, requirements and tests
IEC 60695-2-10 2013 Fire hazard testing – Part 2-10: EN 60695-2-10 2013
Glowing/hot-wire based test methods –
Glow-wire apparatus and common test
procedure
IEC 60695-2-11 2014 Fire hazard testing - Part 2-11: EN 60695-2-11 2014
Glowing/hot-wire based test methods -
Glow-wire flammability test method for
end-products (GWEPT)
IEC 60865-1 2011 Short-circuit currents – Calculation of EN 60865-1 2012
effects – Part 1: Definitions and
calculation methods
IEC TR 60890 2014 A method of temperature-rise - -
verification of low-voltage switchgear
and controlgear assemblies by
calculation
IEC 60947-1 2020 Low-voltage switchgear and EN IEC 60947-1 2021
controlgear - Part 1: General rules
IEC 60947-4-1 2018 Low-voltage switchgear and EN 60947-4-1 2019
controlgear – Part 4-1: Contactors and
motor-starters – Electromechanical
contactors and motor-starters
IEC 60947-7-2 2009 Low-voltage switchgear and EN 60947-7-2 2009
controlgear – Part 7-2: Ancillary
equipment - Protective conductor
terminal blocks for copper conductors
---------------------- Page: 7 ----------------------
SIST EN IEC 61439-1:2021
EN IEC 61439-1:2021 (E)
Publication Year Title EN/HD Year
IEC 61000-4-2 2008 Electromagnetic compatibility (EMC) – EN 61000-4-2 2009
Part 4-2: Testing and measurement
techniques – Electrostatic discharge
immunity test
IEC 61000-4-3 2006 , Electromagnetic compatibility (EMC) – EN 61000-4-3 2006
Part 4-3: Testing and measurement
+A1 2007 techniques – Radiated, radio- +A1 2008
+A2 2010 frequency, electromagnetic field +A2 2010
immunity test
IEC 61000-4-4 2012 Electromagnetic compatibility (EMC) – EN 61000-4-4 2012
Part 4-4: Testing and measurement
techniques – Electrical fast
transient/burst immunity test
IEC 61000-4-5 2014 Electromagnetic compatibility (EMC) – EN 61000-4-5 2014
Part 4-5: Testing and measurement
+A1 2017 techniques – Surge immunity test +A1 2017
IEC 61000-4-6 2013 Electromagnetic compatibility (EMC) – EN 61000-4-6 2014
Part 4-6: Testing and measurement +AC1 2015
techniques – Immunity to conducted
disturbances, induced by radio-
frequency fields
IEC 61000-4-8 2009 Electromagnetic compatibility (EMC) – EN 61000-4-8 2010
Part 4-8: Testing and measurement
techniques – Power frequency
magnetic field immunity test
IEC 61000-4-11 2004 Electromagnetic compatibility (EMC) – EN 61000-4-11 2004
Part 4-11: Testing and measurement
+A1 2017 +A1 2017
techniques – Voltage dips, short
interruptions and voltage variations
immunity tests
IEC 61000-6-2 2016 Electromagnetic compatibility (EMC) - EN 61000-6-2 2019
Part 6-2: Generic standards – Immunity
standard for industrial environments
IEC 61000-6-3 2006 Electromagnetic compatibility (EMC) – EN 61000-6-3 2007
Part 6-3: Generic standards – Emission
+A1 2010 +A1 2011
standard for residential, commercial
and light-industrial environments
IEC 61000-6-4 2018 Electromagnetic compatibility (EMC) – EN 61000-6-4 2019
Part 6-4: Generic standards –Emission
standard for industrial environments
IEC 61082-1 2014 Preparation of documents used in EN 61082 2015
electrotechnology – Part 1: Rules
IEC 61180 2016 High-voltage test techniques for low- EN 61180 2016
voltage equipment – Definitions, test
and procedure requirements, test
equipment
IEC 61439 (all parts) Low-voltage switchgear and EN 61439 (all parts)
controlgear assemblies
---------------------- Page: 8 ----------------------
SIST EN IEC 61439-1:2021
EN IEC 61439-1:2021 (E)
Publication Year Title EN/HD Year
IEC 61545 1996 Connecting devices - Devices for the - -
connection of aluminium conductors in
clamping units of any material and
copper conductors in aluminium bodied
clamping units
IEC 61921 2017 Power capacitors - Low-voltage power EN 61921 —
factor correction banks
IEC 62208 2011 Empty enclosures for low-voltage EN 62208 2011
switchgear and controlgear assemblies
- General requirements
IEC 81346-1 2009 Industrial systems, installations and EN 81346-1 2009
equipment and industrial products –
Structuring principles and reference
designations – Part 1: Basic rules
IEC 81346-2 2019 Industrial systems, installations and EN IEC 81346-2 2019
equipment and industrial products –
Structuring principles and reference
designations – Part 2: Classification of
objects and codes for classes
CISPR 11 2015 Industrial, scientific and medical EN 55011 2016
equipment – Radio-frequency (modified)
+A1 2016 disturbance characteristics – Limits and +A11 2020
methods of measurement
+A2 2019
CISPR 32 2015 Electromagnetic compatibility of EN 55032 2015
multimedia equipment – Emission (modified)
requirements
+A1 2019 +A11 2020
ISO 178 2010 Plastics – Determination of flexural EN ISO 178 2010
properties
+A1 2013 +A1 2013
ISO 179-1 2010 Plastics – Determination of Charpy EN ISO 179-1 2010
impact properties -- Part 1: Non-
instrumented impact test
ISO 179-2 1997 Plastics – Determination of Charpy EN ISO 179-2 1999
impact properties -- Part 2:
+A1 2011 +A1 2012
Instrumented impact test
ISO 2409 2013 Paints and varnishes – Cross-cut test EN ISO 22409 2013
ISO 4628-3 2016 Paints and varnishes – Evaluation of EN ISO 4628-3 2016
degradation of coatings – Designation
of quantity and size of defects, and of
intensity of uniform changes in
appearance – Part 3: Assessment of
degree of rusting
ISO 4892-2 2013 Plastics – Methods of exposure to EN ISO 4892-2 2013
laboratory light sources – Part 2:
Xenon-arc lamps
Under preparation. Stage at time of preparation FprEN 61921:2017.
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SIST EN IEC 61439-1:2021
EN IEC 61439-1:2021 (E)
Annex ZZ
(informative)
Relationship between this European standard and the safety
objectives of Directive 2014/35/EU [2014 OJ L96] aimed to be
covered

This European standard has been prepared under a Commission’s standardisation request relating to

harmonised standards in the field of the Low Voltage Directive, M/511, to provide one voluntary means

of conforming to safety objectives of 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

[2014 OJ L96].

Once this standard is cited in the Official Journal of the European Union under that Directive,

compliance with the normative clauses of this standard given in Table ZZ.1 confers, within the limits of

the scope of this standard, a presumption of conformity with the corresponding safety objectives of

that Directive, and associated EFTA regulations.

Table ZZ.1 — Correspondence between this European standard and Annex I of Directive

2014/35/EU [2014 OJ L96]
Clause(s) / sub-clause(s)
Safety objectives of Directive
Remarks / Notes
2014/35/EU
of this EN
(1)(a) Clauses 6
(1)(b) Clauses 6
(1)(c) See safety objectives 2 a) to 2 d)
and 3 a) to 3 c) in this table
(2)(a) Clauses 8.2, 8.3, 8.4, 8.5, 10.5,
10.6, 10.9, 11.4, 11.5
(2)(b) Clauses 7.1, 7.2, 8.1, 8.2, 8.3,
8.4, 8.5, 8.6, 8.7, 9.1, 9.2, 9.3,
10.2, 10.3, 10.4, 10.5, 10.6, 10.7,
10.9, 10.10, 10.11, 11.2, 11.3,
11.4, 11.5, 11.6, 11.9
(2)(c) Clauses 6.2, 7.2, 8.1, 8.2, 8.5,
9.2, 9.3, 9.4, 10.2, 10.3, 10.6,
10.10, 10.11, 11.2, 11.5, 11.8,
annex J
(2)(d) Clauses 5, 8.1, 8.2, 8.3, 8.4, 8.5,
8.6, 8.7, 9.1, 9.2, 9.3, 10.2, 10.3,
10.4, 10.5, 10.6, 10.7, 10.9,
10.10, 10.11, 11.2, 11.3, 11.4,
11.5, 11.9, 11.10
(3)(a) Clauses 6.2, 7.2, 8.1, 8.2, 9.3,
10.2, 10.11, 11.8
(3)(b) Clause 7.1, 7.2, 8.1, 8.2, 8.3,
8.7, 9.1, 9.2, 9.3, 9.4, 10.2, 10.3,
10.4, 10.6, 10.9, 10.10, 10.11,
10.12, 11.2, 11.3, 11.9
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SIST EN IEC 61439-1:2021
EN IEC 61439-1:2021 (E)
Clause(s) / sub-clause(s)
Safety objectives of Directive
Remarks / Notes
2014/35/EU
of this EN
(3)(c) Clauses 5.3, 5.4, 8.1, 8.5, 8.6,
9.2, 9.3, 10.2, 10.5, 10.6, 10.7,
10.10, 10.11, 11.4, 11.5, 11.6,
11.8, 11.10, annex E, annex I
annex P

WARNING 1: Presumption of conformity stays valid only as long as a reference to this European

standard is maintained in the list published in the Official Journal of the European Union. Users of this

standard should consult frequently the latest list published in the Official Journal of the European

Union.

WARNING 2: Other Union legislation may be applicable to the product(s) falling within the scope of

this standard.
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SIST EN IEC 61439-1:2021
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SIST EN IEC 61439-1:2021
IEC 61439-1
Edition 3.0 2020-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Low-voltage switchgear and controlgear assemblies –
Part 1: General rules
Ensembles d’appareillage à basse tension –
Partie 1: Règles générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.130.20 ISBN 978-2-8322-8154-3

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN IEC 61439-1:2021
– 2 – IEC 61439-1:2020 © IEC 2020
CONTENTS

FOREWORD ........................................................................................................................... 8

INTRODUCTION ................................................................................................................... 10

1 Scope ............................................................................................................................ 11

2 Normative references .................................................................................................... 11

3 Terms and definitions .................................................................................................... 14

3.1 General terms ....................................................................................................... 14

3.2 Constructional units of assemblies ........................................................................ 16

3.3 External design of assemblies ............................................................................... 18

3.4 Structural parts of assemblies ............................................................................... 19

3.5 Conditions of installation of assemblies ................................................................ 20

3.6 Insulation characteristics ...................................................................................... 20

3.7 Protection against electric shock ........................................................................... 23

3.8 Characteristics ...................................................................................................... 27

3.9 Verification ........................................................................................................... 31

3.10 Manufacturer ........................................................................................................ 32

3.11 User ...................................................................................................................... 32

4 Symbols and abbreviations ............................................................................................ 32

5 Interface characteristics ................................................................................................ 33

5.1 General ................................................................................................................. 33

5.2 Voltage ratings ...................................................................................................... 33

5.2.1 Rated voltage (U ) (of the assembly) ............................................................. 33

5.2.2 Rated operational voltage (U ) (of a circuit of an assembly)........................... 34

5.2.3 Rated insulation voltage (U ) (of a circuit of an assembly) .............................. 34

5.2.4 Rated impulse withstand voltage (U ) (of the assembly) ............................. 34

imp

5.3 Current ratings ...................................................................................................... 34

5.3.1 Rated current of an assembly (I ) ................................................................ 34

5.3.2 Rated current of a main outgoing circuit (I ) ................................................. 34

5.3.3 Group rated current of a main circuit (I ) ...................................................... 35

5.3.4 Rated peak withstand current (I ) ................................................................. 35

5.3.5 Rated short-time withstand current (I ) (of a main circuit of an

assembly) ...................................................................................................... 36

5.3.6 Rated conditional short-circuit current (I ) (of an assembly or a circuit

of an assembly) ............................................................................................. 36

5.4 Rated diversity factor (RDF) .................................................................................. 36

5.5 Rated frequency (f ) ............................................................................................. 36

5.6 Other characteristics ............................................................................................. 37

6 Information .................................................................................................................... 37

6.1 Assembly designation marking .............................................................................. 37

6.2 Documentation ...................................................................................................... 37

6.2.1 Information relating to the assembly .............................................................. 37

6.2.2 Instructions for handling, installation, operation and maintenance .................. 38

6.3 Device and/or component identification ................................................................. 38

7 Service conditions ......................................................................................................... 38

7.1 Normal service conditions ..................................................................................... 38

7.1.1 Climatic conditions ........................................................................................ 38

7.1.2 Pollution degree ............................................................................................ 39

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7.2 Special service conditions ..................................................................................... 39

7.3 Conditions during transport, storage and installation ............................................. 40

8 Constructional requirements .......................................................................................... 40

8.1 Strength of materials and parts ............................................................................. 40

8.1.1 General ......................................................................................................... 40

8.1.2 Protection against corrosion .......................................................................... 41

8.1.3 Properties of insulating materials ................................................................... 41

8.1.4 Resistance to ultra-violet (UV) radiation ......................................................... 41

8.1.5 Mechanical strength ...................................................................................... 41

8.1.6 Lifting provision ............................................................................................. 42

8.2 Degree of protection provided by an assembly enclosure ...................................... 42

8.2.1 Protection against mechanical impact (IK code) ............................................. 42

8.2.2 Protection against contact with live parts, ingress of solid foreign bodies

and water (IP code) ....................................................................................... 42

8.2.3 Assembly with removable parts...................................................................... 43

8.3 Clearances and creepage distances...................................................................... 43

8.3.1 General ......................................................................................................... 43

8.3.2 Clearances .................................................................................................... 43

8.3.3 Creepage distances ....................................................................................... 44

8.4 Protection against electric shock ........................................................................... 44

8.4.1 General ......................................................................................................... 44

8.4.2 Basic protection ............................................................................................. 44

8.4.3 Fault protection ............................................................................................. 45

8.4.4 Additional requirements for class II assemblies ............................................. 48

8.4.5 Limitation of steady-state touch currents and charge ..................................... 49

8.4.6 Operating and servicing conditions ................................................................ 49

8.5 Incorporation of switching devices and components .............................................. 50

8.5.1 Fixed parts .................................................................................................... 50

8.5.2 Removable parts ........................................................................................... 51

8.5.3 Selection of switching devices and components ............................................. 51

8.5.4 Installation of switching devices and components .......................................... 51

8.5.5 Accessibility .................................................................................................. 52

8.5.6 Barriers ......................................................................................................... 52

8.5.7 Direction of operation and indication of switching positions ............................ 52

8.5.8 Indicator lights and push-buttons ................................................................... 52

8.5.9 Power factor correction banks ....................................................................... 52

8.6 Internal electrical circuits and connections ............................................................ 52

8.6.1 Main circuits .................................................................................................. 52

8.6.2 Auxiliary circuits ............................................................................................ 53

8.6.3 Bare and insulated conductors ..............................................

...

SLOVENSKI STANDARD
oSIST prEN IEC 61439-1:2019
01-maj-2019
Sestavi nizkonapetostnih stikalnih in krmilnih naprav - 1. del: Splošna pravila
Low-voltage switchgear and controlgear assemblies - Part 1: General rules
Niederspannungs-Schaltgerätekombinationen - Teil 1: Allgemeine Festlegungen
Ensembles d'appareillage à basse tension - Partie 1: Règles générales
Ta slovenski standard je istoveten z: prEN IEC 61439-1:2019
ICS:
29.130.20 Nizkonapetostne stikalne in Low voltage switchgear and
krmilne naprave controlgear
oSIST prEN IEC 61439-1:2019 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN IEC 61439-1:2019
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oSIST prEN IEC 61439-1:2019
121B/80/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61439-1 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2019-03-08 2019-05-31
SUPERSEDES DOCUMENTS:
121B/71/CD,121B/76/CC
IEC SC 121B : LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR ASSEMBLIES
SECRETARIAT: SECRETARY:
Germany Mr André Kling
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
SC 22G,TC 44,SC 121A
Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY

SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING

Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.

This document is still under study and subject to change. It should not be used for reference purposes.

Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of

which they are aware and to provide supporting documentation.
TITLE:
Low-voltage switchgear and controlgear assemblies - Part 1: General rules
PROPOSED STABILITY DATE: 2025
NOTE FROM TC/SC OFFICERS:
SC 121B Officer support circulation of CDV for project IEC 61439-1 ED3.

Secretary note: NCs are kindly requested to refer their comments to line numbers.

Copyright © 2019 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to

download this electronic file, to make a copy and to print out the content for the sole purpose of preparing National

Committee positions. You may not copy or "mirror" the file or printed version of the document, or any part of it, for

any other purpose without permission in writing from IEC.
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oSIST prEN IEC 61439-1:2019
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1 CONTENTS

3 FOREWORD ........................................................................................................................... 9

4 INTRODUCTION ................................................................................................................... 11

5 1 Scope ............................................................................................................................ 12

6 2 Normative references .................................................................................................... 12

7 3 Terms and definitions .................................................................................................... 15

8 3.1 General terms ....................................................................................................... 15

9 3.2 Constructional units of assemblies ........................................................................ 17

10 3.3 External design of assemblies ............................................................................... 18

11 3.4 Structural parts of assemblies ............................................................................... 19

12 3.5 Conditions of installation of assemblies................................................................. 20

13 3.6 Insulation characteristics ...................................................................................... 21

14 3.7 Protection against electric shock ........................................................................... 23

15 3.8 Characteristics ...................................................................................................... 27

16 3.9 Verification............................................................................................................ 30

17 3.10 Manufacturer ........................................................................................................ 31

18 4 Symbols and abbreviations ............................................................................................ 31

19 5 Interface characteristics................................................................................................. 32

20 5.1 General ................................................................................................................. 32

21 5.2 Voltage ratings ...................................................................................................... 32

22 5.2.1 Rated voltage (U ) (of the assembly) ............................................................. 32

23 5.2.2 Rated operational voltage (U ) (of a circuit of an assembly) .......................... 32

24 5.2.3 Rated insulation voltage (U ) (of a circuit of an assembly) .............................. 33

25 5.2.4 Rated impulse withstand voltage (U ) (of the assembly) ............................ 33

imp

26 5.3 Current ratings ...................................................................................................... 33

27 5.3.1 Rated current of an assembly (I ) ............................................................... 33

28 5.3.2 Rated current of a main outgoing circuit (I ) ................................................ 33

29 5.3.3 Group rated current of a main circuit (I ) ....................................................... 33

30 5.3.4 Rated peak withstand current (I ) ................................................................ 34

31 5.3.5 Rated short-time withstand current (I ) (of a main circuit of an

32 assembly) ...................................................................................................... 34

33 5.3.6 Rated conditional short-circuit current (I ) (of an assembly or a circuit

34 of an assembly) ............................................................................................. 34

35 5.4 Rated diversity factor (RDF) .................................................................................. 34

36 5.5 Rated frequency (f ) ............................................................................................. 35

37 5.6 Other characteristics ............................................................................................. 35

38 6 Information .................................................................................................................... 35

39 6.1 Assembly designation marking .............................................................................. 35

40 6.2 Documentation ...................................................................................................... 36

41 6.2.1 Information relating to the assembly .............................................................. 36

42 6.2.2 Instructions for handling, installation, operation and maintenance .................. 36

43 6.3 Device and/or component identification ................................................................. 37

44 7 Service conditions ......................................................................................................... 37

45 7.1 Normal service conditions ..................................................................................... 37

46 7.1.1 Climatic conditions ........................................................................................ 37

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47 7.1.2 Pollution degree ............................................................................................ 37

48 7.2 Special service conditions ..................................................................................... 37

49 7.3 Conditions during transport, storage and installation ............................................. 38

50 8 Constructional requirements .......................................................................................... 38

51 8.1 Strength of materials and parts ............................................................................. 38

52 8.1.1 General ......................................................................................................... 38

53 8.1.2 Protection against corrosion .......................................................................... 39

54 8.1.3 Properties of insulating materials ................................................................... 39

55 8.1.4 Resistance to ultra-violet (UV) radiation ......................................................... 39

56 8.1.5 Mechanical strength....................................................................................... 39

57 8.1.6 Lifting provision ............................................................................................. 40

58 8.2 Degree of protection provided by an assembly enclosure ...................................... 40

59 8.2.1 Protection against mechanical impact ............................................................ 40

60 8.2.2 Protection against contact with live parts, ingress of solid foreign bodies

61 and water ...................................................................................................... 40

62 8.2.3 assembly with removable parts ...................................................................... 40

63 8.3 Clearances and creepage distances ...................................................................... 41

64 8.3.1 General ......................................................................................................... 41

65 8.3.2 Clearances .................................................................................................... 41

66 8.3.3 Creepage distances ....................................................................................... 41

67 8.3.4 AC conductors passing through ferromagnetic enclosures or plates ............... 42

68 8.4 Protection against electric shock ........................................................................... 42

69 8.4.1 General ......................................................................................................... 42

70 8.4.2 Basic protection ............................................................................................. 42

71 8.4.3 Fault protection ............................................................................................. 43

72 8.4.4 Additional requirements for class II assemblies.............................................. 45

73 8.4.5 Limitation of steady-state touch currents and charge ..................................... 46

74 8.4.6 Operating and servicing conditions ................................................................ 46

75 8.5 Incorporation of switching devices and components .............................................. 48

76 8.5.1 Fixed parts .................................................................................................... 48

77 8.5.2 Removable parts ........................................................................................... 48

78 8.5.3 Selection of switching devices and components ............................................. 48

79 8.5.4 Installation of switching devices and components .......................................... 49

80 8.5.5 Accessibility................................................................................................... 49

81 8.5.6 Barriers ......................................................................................................... 49

82 8.5.7 Direction of operation and indication of switching positions ............................ 49

83 8.5.8 Indicator lights and push-buttons ................................................................... 49

84 8.5.9 Power factor correction banks........................................................................ 49

85 8.6 Internal electrical circuits and connections ............................................................ 50

86 8.6.1 Main circuits .................................................................................................. 50

87 8.6.2 Auxiliary circuits ............................................................................................ 50

88 8.6.3 Bare and insulated conductors ....................................................................... 50

89 8.6.4 Selection and installation of non-protected live conductors to reduce the

90 possibility of short-circuits ............................................................................. 51

91 8.6.5 Identification of the conductors of main and auxiliary circuits ......................... 52

92 8.6.6 Identification of the protective conductor (PE, PEL, PEM, PEN) and of
93 the neutral conductor (N) and the mid-point conductor (M) of the main

94 circuits ........................................................................................................... 52

95 8.7 Cooling (natural and/or active) .............................................................................. 52

96 8.8 Terminals for external cables ................................................................................ 52

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97 9 Performance requirements............................................................................................. 53

98 9.1 Dielectric properties .............................................................................................. 53

99 9.1.1 General ......................................................................................................... 53

100 9.1.2 Power-frequency withstand voltage................................................................ 54

101 9.1.3 Impulse withstand voltage.............................................................................. 54

102 9.1.4 Protection of surge protective devices ........................................................... 54

103 9.2 Temperature-rise limits ......................................................................................... 54

104 9.2.1 General ......................................................................................................... 54

105 9.2.2 Adjustment of rated currents for alternative ambient air temperatures ............ 55

106 9.3 Short-circuit protection and short-circuit withstand strength .................................. 55

107 9.3.1 General ......................................................................................................... 55

108 9.3.2 Information concerning short-circuit withstand strength .................................. 55

109 9.3.3 Relationship between peak current and short-time current ............................. 56

110 9.3.4 Coordination of protective devices ................................................................. 56

111 9.4 Electromagnetic compatibility (EMC) ..................................................................... 56

112 10 Design verification ......................................................................................................... 56

113 10.1 General ................................................................................................................. 56

114 10.2 Strength of materials and parts ............................................................................. 58

115 10.2.1 General ......................................................................................................... 58

116 10.2.2 Resistance to corrosion ................................................................................. 58

117 10.2.3 Properties of insulating materials ................................................................... 59

118 10.2.4 Resistance to ultra-violet (UV) radiation ......................................................... 60

119 10.2.5 Lifting ............................................................................................................ 61

120 10.2.6 Verification of protection against mechanical impact ...................................... 61

121 10.2.7 Marking ......................................................................................................... 62

122 10.2.8 Mechanical operation ..................................................................................... 62

123 10.3 IP degree of protection of assemblies ................................................................... 62

124 10.4 Clearances and creepage distances ...................................................................... 63

125 10.5 Protection against electric shock and integrity of protective circuits ...................... 63

126 10.5.1 Effectiveness of the protective circuit ............................................................. 63

127 10.5.2 Effective earth continuity between the exposed-conductive-parts of the

128 class I assembly and the protective circuit ..................................................... 63

129 10.5.3 Short-circuit withstand strength of the protective circuit ................................. 64

130 10.6 Incorporation of switching devices and components .............................................. 64

131 10.6.1 General ......................................................................................................... 64

132 10.6.2 Electromagnetic compatibility ........................................................................ 64

133 10.7 Internal electrical circuits and connections ............................................................ 64

134 10.8 Terminals for external conductors ......................................................................... 64

135 10.9 Dielectric properties .............................................................................................. 65

136 10.9.1 General ......................................................................................................... 65

137 10.9.2 Power-frequency withstand voltage................................................................ 65

138 10.9.3 Impulse withstand voltage.............................................................................. 66

139 10.9.4 Testing of enclosures made of insulating material .......................................... 68

140 10.9.5 External door or cover mounted operating handles of insulating material ....... 68

141 10.9.6 Testing of conductors and hazardous live parts covered by insulating

142 material to provide protection against electric shock ...................................... 68

143 10.10 Temperature-rise .................................................................................................. 68

144 10.10.1 General ......................................................................................................... 68

145 10.10.2 Verification by testing .................................................................................... 68

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146 10.10.3 Verification by comparison ............................................................................. 74

147 10.10.4 Verification assessment ................................................................................. 77

148 10.11 Short-circuit withstand strength ............................................................................. 79

149 10.11.1 General ......................................................................................................... 79

150 10.11.2 Circuits of assemblies which are exempted from the verification of the

151 short-circuit withstand strength ...................................................................... 79

152 10.11.3 Verification by comparison with a reference design – Using a checklist ......... 79

153 10.11.4 Verification by comparison with a reference design(s) – Using

154 calculation ..................................................................................................... 80

155 10.11.5 Verification by test ......................................................................................... 80

156 10.12 Electromagnetic compatibility (EMC) ..................................................................... 85

157 11 11 Routine verification ................................................................................................... 85

158 11.1 General ................................................................................................................. 85

159 11.2 Degree of protection against contact with hazardous live parts, ingress of

160 solid foreign bodies and water of enclosures ......................................................... 86

161 11.3 Clearances and creepage distances ...................................................................... 86

162 11.4 Protection against electric shock and integrity of protective circuits ...................... 86

163 11.5 Incorporation of built-in components ..................................................................... 87

164 11.6 Internal electrical circuits and connections ............................................................ 87

165 11.7 Terminals for external conductors ......................................................................... 87

166 11.8 Mechanical operation ............................................................................................ 87

167 11.9 Dielectric properties .............................................................................................. 87

168 11.10 Wiring, operational performance and function ....................................................... 87

169 Annex A (normative) Minimum and maximum cross-section of copper cables suitable

170 for connection to terminals for external cabless (see 8.8) .............................................. 96

171 Annex B (normative) Method of calculating the cross-sectional area of protective

172 conductors with regard to thermal stresses due to currents of short duration ................. 97

173 Annex C (informative) User information template ................................................................. 98

174 Annex D (informative) Design verification .......................................................................... 102

175 Annex E (informative) Rated diversity factor ...................................................................... 103

176 E.1 General ............................................................................................................... 103

177 E.2 Rated diversity factor for outgoing circuits within an assembly ............................ 103

178 E.2.1 General ....................................................................................................... 103

179 Rating of the device I ......................................................................................................... 105

180 Example 1 Figure E.2 ......................................................................................................... 105

181 E.2.2 Example of an assembly with a RDF 0,68 .................................................... 106

182 E.2.3 Example of an assembly with RDF declared for each section ................................ 107

183 Annex F (normative) Measurement of clearances and creepage distances ........................ 108

184 F.1 Basic principles ................................................................................................... 108

185 F.2 Use of ribs .......................................................................................................... 108

186 Annex G (normative) Correlation between the nominal voltage of the supply system

187 and the rated impulse withstand voltage of the equipment ........................................... 113

188 Annex H (informative) Operating current and power loss of copper conductors .................. 115

189 Annex I (informative) Thermal equivalent of an intermittent current .................................... 118

190 I.1 Thermal equivalent of an intermittent duty ........................................................... 118

191 Annex J (normative) Electromagnetic compatibility (EMC)................................................. 119

192 J.1 General ............................................................................................................... 119

193 J.3 Terms and definitions .......................................................................................... 119

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194 J.9.4Performance requirements ...................................................................................... 120

195 J.9.4.1General ............................................................................................................... 120

196 J.9.4.2Requirement for testing........................................................................................ 120

197 J.9.4.3Immunity .............................................................................................................. 121

198 J.9.4.3.1Assemblies not incorporating electronic circuits ................................................ 121

199 J.9.4.3.2Assemblies incorporating electronic circuits ...................................................... 121

200 J.9.4.4Emission .............................................................................................................. 121

201 J.9.4.4.1Assemblies not incorporating electronic circuits ................................................ 121

202 J.9.4.4.2Assemblies incorporating electronic circuits ...................................................... 121

203 J.10.12Tests for EMC .................................................................................................. 121

204 J.10.12.2Immunity tests ................................................................................................. 122

205 J.10.12.2.1Assemblies not incorporating electronic circuits ............................................ 122

206 J.10.12.2.2Assemblies incorporating electronic circuits .................................................. 122

207 J.10.12.3 Emission tests ............................................................................................. 122

208 J.10.12.3.1 Assemblies not incorporating electronic circuits ........................ 122

209 J.10.12.3.2 Assemblies incorporating electronic circuits .............................. 122

210 Annex K Void ...................................................................................................................... 126

211 Annex L Void ...................................................................................................................... 127

212 Annex M Void ..................................................................................................................... 128

213 Annex N (normative) Operating current and power loss of bare copper bars ...................... 129

214 Annex O (informative) Guidance on verification of temperature-rise ................................... 132

215 O.1 General ............................................................................................................... 132

216 O.1.1 Principals .................................................................................................... 132

217 O.1.2 Current ratings of assemblies ...................................................................... 132

218 O.2 Temperature-rise limits ....................................................................................... 133

219 O.3 Test .................................................................................................................... 133

220 O.3.1 General ....................................................................................................... 133

221 O.3.2 Method a) – Verification of the complete assembly (10.10.2.3.5) ................. 134

222 O.3.3 Method b) – Verification considering individual functional units

223 separately and the complete assembly (10.10.2.3.6) ................................... 134

224 O.3.4 Method c) – Verification considering individual functional units and the

225 main and distribution busbars separately as well as the complete

226 assembly (10.10.2.3.7) ................................................................................ 134

227 O.4 Verification assessment ...................................................................................... 134

228 O.4.1 General ....................................................................................................... 134

229 O.4.2 Single compartment assembly with a rated current (I ) not exceeding
230 630 A ...............
...

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