IEC 61439-5:2023

IEC 61439-5 ®
Edition 3.0 2023-05
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Low-voltage switchgear and controlgear assemblies –
Part 5: Assemblies for power distribution in public networks

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IEC 61439-5 ®
Edition 3.0 2023-05
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Low-voltage switchgear and controlgear assemblies –
Part 5: Assemblies for power distribution in public networks
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.130.20 ISBN 978-2-8322-6987-9

– 2 – IEC 61439-5:2023 RLV © IEC 2023
CONTENTS
FOREWORD . 3
1 Scope . 6
2 Normative references . 7
3 Terms and definitions . 8
4 Symbols and abbreviations . 9
5 Interface characteristics. 9
6 Information . 10
7 Service conditions . 10
8 Constructional requirements . 10
9 Performance requirements. 14
10 Design verification . 14
11 Routine verification . 30
Annexes . 31
Annex O L (informative) Guidance on verification of temperature rise verification . 32
Annex AA (normative) Cross-section of conductors . 33
Annex BB (informative) Items subject to agreement between the assembly
manufacturer and the user . 35
Annex CC (informative) Design verification . 39
Annex DD (informative) List of notes concerning certain countries . 41
Bibliography . 42

Figure 101 – Typical distribution network . 7
Figure 102 – Diagram of test to verify resistance to shock load of a PENDA-O . 18
Figure 103 – Diagram of test to verify impact force withstand of a PENDA-O . 19
Figure 104 – Diagram of test to verify the resistance to static load . 20
Figure 105 – Sandbag for test to verify the resistance to shock load . 21
Figure 106 – Diagram of test to verify resistance to torsional stress of a PENDA-O . 23
Figure 107 – Diagram of test to verify the mechanical strength of doors . 26
Figure 108 – Striker element for test of resistance to mechanical shock impacts
induced by sharp-edged objects . 27
Figure 109 – Typical test arrangement for mechanical strength of base . 28

Table 101 – Values of assumed loading . 9
Table 102 – Axial load to be applied to the inserts . 27
Table AA.1 – Minimum and maximum cross-section of copper and aluminium
conductors, suitable for connection (see 8.8) . 33
Table AA.2 – Standard cross-sections of round copper conductors and approximate
relationship between mm and AWG/kcmil sizes (see 8.8 of IEC 61439‑1:2020) . 34
Table BB.1 – Items subject to agreement between the ASSEMBLY manufacturer
and the user . 35
Table CC.1 – List of design verifications to be performed. 39

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR ASSEMBLIES –

Part 5: Assemblies for power distribution in public networks

FOREWORD
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6) All users should ensure that they have the latest edition of this publication.
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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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.
This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition IEC 61439-5:2014. A vertical bar appears in the margin
wherever a change has been made. Additions are in green text, deletions are in
strikethrough red text.
– 4 – IEC 61439-5:2023 RLV © IEC 2023
IEC 61439-5 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. It is an International Standard.
This third edition cancels and replaces the second edition published in 2014. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) omission of the requirement to conduct mechanical tests at -25 °C when enclosures are
made of a metallic material;
b) addition of assumed loading factors generation supplies and electric vehicle charging
applications;
c) additional dielectric tests when a PENDA is used in a distribution substation with separate
HV and LV earths;
d) further clarification of representative samples for design verification.
The text of this International Standard is based on the following documents:
Draft Report on voting
121B/173/FDIS 121B/178/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
This document is to be read in conjunction with IEC 61439-1. 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 61439-1:2020 is to be adapted accordingly. Subclauses that are numbered
with a 101 (102, 103 etc.) suffix are additional to the same subclause in IEC 61439‑1:2020.
Tables and figures in IEC 61439-5:2023 that are new are numbered starting with 101.
New annexes in IEC 61439-5:2023 are lettered AA, BB, etc.
The reader’s attention is drawn to the fact that Annex DD lists all of the "in-some-country"
clauses on differing practices of a less permanent nature relating to the subject of this
document.
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 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.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.

– 6 – IEC 61439-5:2023 RLV © IEC 2023
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