SIST EN IEC 61439-2:2021

SLOVENSKI STANDARD
SIST EN IEC 61439-2:2021
01-julij-2021
Nadomešča:
SIST EN 61439-2:2012
Sestavi nizkonapetostnih stikalnih in krmilnih naprav - 2. del: Sestavi močnostnih
stikalnih in krmilnih naprav (IEC 61439-2:2020)
Low-voltage switchgear and controlgear assemblies - Part 2: Power switchgear and
controlgear assemblies (IEC 61439-2:2020)
Niederspannungs-Schaltgerätekombinationen - Teil 2: Energie-
Schaltgerätekombinationen (IEC 61439-2:2020)
Ensembles d'appareillage à basse tension - Partie 2: Ensembles d'appareillage de
puissance (IEC 61439-2:2020)
Ta slovenski standard je istoveten z: EN IEC 61439-2:2021
ICS:
29.130.20 Nizkonapetostne stikalne in Low voltage switchgear and
krmilne naprave controlgear
SIST EN IEC 61439-2:2021 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 61439-2:2021

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SIST EN IEC 61439-2:2021


EUROPEAN STANDARD EN IEC 61439-2

NORME EUROPÉENNE

EUROPÄISCHE NORM
May 2021
ICS 29.130.20 Supersedes EN 61439-2:2011 and all of its amendments
and corrigenda (if any)
English Version
Low-voltage switchgear and controlgear assemblies - Part 2:
Power switchgear and controlgear assemblies
(IEC 61439-2:2020)
Ensembles d'appareillage à basse tension - Partie 2: Niederspannungs-Schaltgerätekombinationen - Teil 2:
Ensembles d'appareillage de puissance Energie-Schaltgerätekombinationen
(IEC 61439-2:2020) (IEC 61439-2:2020)
This European Standard was approved by CENELEC on 2020-08-26. 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 61439-2:2021 E

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SIST EN IEC 61439-2:2021
EN IEC 61439-2:2021 (E)
European foreword
The text of document 121B/104/FDIS, future edition 3 of IEC 61439-2, 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 61439-2:2021.
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 61439-2:2011 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 61439-2:2020 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 60269 (series) NOTE Harmonized as EN 60269 (series)
IEC 60898 (series) NOTE Harmonized as EN 60898 (series)
IEC 60947 (series) NOTE Harmonized as EN IEC 60947 (series)
IEC 61008 (series) NOTE Harmonized as EN 61008 (series)
IEC 61009 (series) NOTE Harmonized as EN 61009 (series)
IEC 61427-1:2013 NOTE Harmonized as EN 61427-1:2013 (not modified)
IEC 61010-2-201 NOTE Harmonized as EN IEC 61010-2-201
IEC 61800-5-1 NOTE Harmonized as EN 61800-5-1
IEC 62093 NOTE Harmonized as EN 62093
IEC 62124 NOTE Harmonized as EN 62124
IEC 62423 NOTE Harmonized as EN 62423
2

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SIST EN IEC 61439-2:2021
EN IEC 61439-2:2021 (E)
IEC 62446-1:2016 NOTE Harmonized as EN 62446-1:2016 (not modified)
IEC 62446-1:2016/A1:2018 NOTE Harmonized as EN 62446-1:2016/A1:2018 (not modified)
IEC 62790 NOTE Harmonized as EN IEC 62790
3

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SIST EN IEC 61439-2:2021
EN IEC 61439-2:2021 (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.
Annex ZA of EN IEC 61439-1:2021 applies with the following addition:
Publication Year Title EN/HD Year
IEC 60204-1 2016 Safety of machinery – Electrical equipment EN 60204-1 2018
of machines – Part 1: General
requirements
IEC 60947-3 2020 Low-voltage switchgear and controlgear – EN IEC 60947-3 2021
Part 3: Switches, disconnectors, switch-
disconnectors and fuse-combination units

IEC 61140 2016 Protection against electric shock – EN 61140 2016
Common aspects for installation and
equipment
IEC 61439-1 2020 Low-voltage switchgear and controlgear EN IEC 61439-1 2021
assemblies – Part 1: General rules
IEC 62262 2002 Degrees of protection provided by EN 62262 2002
enclosures for electrical equipment against
external mechanical impacts (IK code)
4

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SIST EN IEC 61439-2:2021
EN IEC 61439-2:2021 (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, annex DD.6
(1)(b) Clauses 6, annex DD.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, 8.101, 10.5,
10.6, 10.9, 11.4, 11.5, annex DD.8.1.1,
annex DD.8.2, annex DD.8.4,
annex DD.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,
annex DD.7, annex DD.8,
annex DD.9.1, annex DD.10.10
(2)(c) Clauses 6.2, 7.2, 8.1, 8.2, 8.5, 8.101,
9.2, 9.3, 9.4, 10.2, 10.3, 10.6, 10.10,
10.11, 11.2, 11.5, 11.8, annex J,
annex DD.6.2, annex DD.8.2,
annex DD.10.10
(2)(d) Clauses 5, 8.1, 8.2, 8.3, 8.4, 8.5, 8.6,
8.7, 9.1, 9.2, 9.3, 8.101, 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, annex DD.5.2, annex DD.8.1.1,
annex DD.8.2.2, annex DD.8.4,
annex DD.9.1, annex DD.10
5

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SIST EN IEC 61439-2:2021
EN IEC 61439-2:2021 (E)
Clause(s) / sub-clause(s)
Safety objectives of Directive
Remarks / Notes
2014/35/EU
of this EN
(3)(a) Clauses 6.2, 7.2, 8.1, 8.2, 8.101, 9.3,
10.2, 10.11, 11.8, annex DD.6.2,
annex DD.8.2
(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, annex DD.7 annex DD.8.2,
annex DD.8.101, annex DD.8.102,
annex DD.9.1, annex DD.10.10,
annex DD.10.101, annex DD.10.102
(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, annex D.5.3,
annex DD.5.4, annex DD.8.5,
annex DD.10.10
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.

6

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SIST EN IEC 61439-2:2021



IEC 61439-2

®


Edition 3.0 2020-07




INTERNATIONAL



STANDARD



















Low-voltage switchgear and controlgear assemblies –

Part 2: Power switchgear and controlgear assemblies


























INTERNATIONAL

ELECTROTECHNICAL


COMMISSION





ICS 29.130.20 ISBN 978-2-8322-8587-9




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


® Registered trademark of the International Electrotechnical Commission

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SIST EN IEC 61439-2:2021
– 2 – IEC 61439-2:2020 © IEC 2020
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 6
3 Terms and definitions . 6
4 Symbols and abbreviations . 9
5 Interface characteristics . 9
6 Information . 10
7 Service conditions . 11
8 Constructional requirements . 11
9 Performance requirements . 14
10 Design verification . 15
11 Routine verification . 19
Annexes . 22
Annex AA (informative) Items subject to agreement between the PSC-assembly
manufacturer and the user . 23
Annex BB (informative) Forms of internal separation (see 8.101) . 27
Annex CC (informative) Determining power loss by measurement for circuits
exceeding 1600 A in a reference design . 32
Annex DD (informative) Assemblies for use in photovoltaic installations . 34
Annex EE (informative) Items subject to agreement between the photovoltaic
assembly (PVA) manufacturer and the user . 43
Annex FF (informative) Design verification (PVA only) . 47
Annex GG (informative) List of notes concerning certain countries . 49
Bibliography . 50

Figure BB.1 – Symbols used in Figures BB.2, BB.3 and BB.4 . 27
Figure BB.2 – Forms 1 and 2 . 29
Figure BB.3 – Form 3 . 30
Figure BB.4 – Form 4 . 31
Figure CC.1 – Power loss measurement . 33
Figure DD.101 – Indicative arrangement of radiant heat lamps for temperature-rise test
with simulated solar radiation . 41

Table 101 – Values of assumed loading . 19
Table 102 – Test voltages across the open contacts of equipment suitable for isolation . 19
Table 103 – Electrical conditions for the different positions of withdrawable parts . 20
Table 104 – Forms of internal separation . 21
Table AA.1 – Items subject to agreement between the PSC-assembly manufacturer
and the user . 23
Table DD.101 – Solar radiation conditions . 38
Table EE.1 – Items subject to agreement between the PVA manufacturer and the user . 43
Table FF.1 – List of design verifications to be performed on PVA . 47

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SIST EN IEC 61439-2:2021
IEC 61439-2:2020 © IEC 2020 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR ASSEMBLIES –

Part 2: Power switchgear and controlgear assemblies

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 interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61439-2 has been prepared by subcommittee 121B: Low-voltage
switchgear and controlgear assemblies, of IEC technical committee 121: Switchgear and
controlgear and their assemblies for low voltage.
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) addition of Annexes DD, EE and FF for assemblies for use in photovoltaic installation;
b) clarification of the requirements for forms of internal separation and the addition of the
requirement, when the form of separation is higher than 1, all parts within the functional
unit compartment that remain live when the functional unit is switched off shall be
protected to at least IPXXB;
c) alignment with the structure of IEC 61439-1:2020;

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– 4 – IEC 61439-2:2020 © IEC 2020
d) addition of temperature-rise verification for; (i) temperature-rise verification of assemblies
with natural cooling and circuits rated above 1 600 A by a combination of comparison with
a reference design and calculation, and; (ii) temperature-rise verification of assemblies
with active cooling and rated currents up to 1 600 A.
e) consideration of IP with active cooling.
The text of this document is based on the following documents:
FDIS Report on voting
121B/104/FDIS 121B/109/RVD

Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
In this document, general terms and definitions are defined in Clause 3. Further terms and
definitions specific to Annex DD are given in this annex to facilitate easier reading.
The reader's attention is drawn to the fact that Annex GG lists all the “in-some-country”
clauses on differing practices of a less permanent nature relating to the subject of this
document.
This document is to be read in conjunction with IEC 61439-1:2020. The provisions of the
general rules dealt with in IEC 61439-1 are only applicable to this document insofar as they
are specifically cited. When this document states “addition”, “modification” or “replacement”,
the relevant text in IEC 61439-1 is to be adapted accordingly.
Subclauses that are numbered with a 101 (102, 103, etc.) suffix are additional to the same
subclause in IEC 61439-1.
Tables and figures in this document that are new are numbered starting with 101.
New annexes in this document are lettered AA, BB, etc.
In this document, the term PSC-assembly is defined in 3.1.101.
NOTE Throughout the IEC 61439 series of standards, the term assembly (see 3.1.1 of IEC 61439-1:2020) is used
for a low-voltage switchgear and controlgear assembly.
A list of all parts of the IEC 61439 series, under the general title Low-voltage switchgear and
controlgear assemblies can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

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SIST EN IEC 61439-2:2021
IEC 61439-2:2020 © IEC 2020 – 5 –
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR ASSEMBLIES –

Part 2: Power switchgear and controlgear assemblies



1 Scope
This part of IEC 61439 defines the specific requirements for the power switchgear and
controlgear assembly (abbreviated ‘PSC-assembly’ throughout this document see 3.1.101) as
follows:
• assemblies for which the rated voltage does not exceed 1  000 V AC or 1  500 V DC;
• assemblies designed for a nominal frequency of the incoming supply or supplies not
exceeding 1  000 Hz;
NOTE 1 Frequencies above 1 kHz are considered as high frequencies, see also IEC 60664-1:2007, 5.3.3.2.5
to take into account additional constraints to insulation coordination.
• assemblies intended for indoor and outdoor applications;
• stationary or movable assemblies with or without enclosures;
• assemblies intended for use in connection with the generation, transmission, distribution
and conversion of electrical energy, and for the control of equipment consuming electrical
energy and for associated data processing;
• assemblies designed for use under special service conditions, for example in ships and in
rail vehicles, provided that the other relevant specific requirements are complied with;
NOTE 2 Supplementary requirements for assemblies in ships are covered by IEC 60092-302-2.
This document also applies to assemblies for use in photovoltaic installations, designated as
photovoltaic assemblies (PVA). The particular characteristics, specific service conditions and
the requirements for PVA’s are included in Annexes DD, EE and FF.
This document provides supplementary requirements for PSC-assemblies intended for use as
part of the electrical equipment of machines and can be applied in addition to the
requirements given in IEC 60204-1.
This document applies to all assemblies whether they are designed, manufactured and
verified on a one-off basis or fully standardised and manufactured in quantity.
The manufacture and/or assembly can be carried out by an entity other than the original
manufacturer (see 3.10.1 of IEC 61439-1:2020).
This document does not apply to individual devices, for example, circuit-breakers, fuse
switches and self-contained components such as, motor starters, power electronic converter
systems and equipment (PECS), switch mode power supplies (SMPS), uninterruptable power
supplies (UPS), basic drive modules (BDM), complete drive modules (CDM), adjustable speed
power drives systems (PDS), stand-alone energy storage systems (battery and capacitor
systems), and other electronic equipment which comply with their relevant product standards.
This document describes their integration into a PSC-assembly or an empty enclosure used
as a part of a PSC-assembly.
For some applications, such as, explosive atmospheres, functional safety, there may be a
need to comply with the requirements of other standards or legislation in addition to those
specified in the IEC 61439 series.

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This document does not apply to the specific types of assemblies covered by other parts of
IEC 61439. For assemblies not covered by other parts, this part applies.
Unless local legislation details additional requirements, equipment within the scope of this
document, which complies with this document, is deemed to meet essential safety
requirements. This includes fully verified specifier options, for example user choice of
protection against accidental contact with hazardous live parts of IPXXB or IP3XD. Where
special requirements are agreed between the user and manufacturer, that are not fully
specified within this document, for example, (i) part of the assembly is outside the scope of
this document, (ii) exceptional vibration is present at the place of installation, (iii) exceptional
voltage variations occur in service, or (iv) possible adverse effects from sonic or ultrasonic
sources, a risk assessment and/or additional or more severe verifications may be required to
demonstrate that the essential safety requirements have been fulfilled.
2 Normative references
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.
Clause 2 of IEC 61439-1:2020 is applicable in addition to the following:
Addition:
IEC 60204-1:2016, Safety of machinery – Electrical equipment of machines – Part 1: General
requirements
IEC 60947-3:2008, Low-voltage switchgear and controlgear – Part 3: Switches, disconnectors,
switch-disconnectors and fuse-combination units
IEC 60947-3:2008/AMD1:2012
IEC 60947-3:2008/AMD2:2015
IEC 61140:2016, Protection against electric shock – Common aspects for installation and
equipment
IEC 61439-1:2020, Low-voltage switchgear and controlgear assemblies – Part 1: General
rules
IEC 62262:2002, Degrees of protection provided by enclosures for electrical equipment
against external mechanical impacts (IK code)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 61439-1:2020 and
the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
Clause 3 of IEC 61439-1:2020 is applicable, except as follows.

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IEC 61439-2:2020 © IEC 2020 – 7 –
3.1 General terms
Additional terms and definitions:
3.1.101
power switchgear and controlgear assembly
PSC-assembly
assembly used to distribute and control electrical energy for all types of loads, intended for
industrial, commercial and similar applications where operation by ordinary persons is not
intended
Note 1 to entry: It is not excluded for a PSC-assembly to be located in an area accessible to ordinary persons.
3.1.102
test situation
condition of a PSC-assembly or part of it in which the relevant main circuits are open on its
supply side but not necessarily isolated whilst the associated auxiliary circuits are connected,
allowing operational tests of the incorporated device(s)
3.1.103
form of internal separation
classification of physical separation within a PSC-assembly
3.1.104
(electric) actuator
device that produces a specified movement when excited by an electric signal
[SOURCE: IEC 60050-151:20
...