IEC 61439-2:2011

IEC 61439-2 ®
Edition 2.0 2011-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Low-voltage switchgear and controlgear assemblies –
Part 2: Power switchgear and controlgear assemblies

Ensembles d'appareillage à basse tension –
Partie 2: Ensembles d'appareillage de puissance

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IEC 61439-2 ®
Edition 2.0 2011-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Low-voltage switchgear and controlgear assemblies –
Part 2: Power switchgear and controlgear assemblies

Ensembles d'appareillage à basse tension –
Partie 2: Ensembles d'appareillage de puissance

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX T
ICS 29.130.20 ISBN 978-2-88912-605-7

– 2 – 61439-2  IEC:2011
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Symbols and abbreviations . 7
5 Interface characteristics . 7
6 Information . 8
7 Service conditions . 8
8 Constructional requirements . 8
9 Performance requirements . 11
10 Design verification . 11
11 Routine verification . 12
Annex AA (informative) Forms of internal separation (see 8.101) . 16
Annex BB (informative) Items subject to agreement between the ASSEMBLY
manufacturer and the user . 19
Bibliography . 23

Figure AA.1 – Symbols used in Figures AA.2 and AA.3 . 16
Figure AA.2 – Forms 1 and 2 . 17
Figure AA.3 – Forms 3 and 4 . 18

Table 101 – Values of assumed loading . 12
Table 102 – Test voltages across the open contacts of equipment suitable for isolation . 12
Table 103 – Electrical conditions for the different positions of withdrawable parts . 13
Table 104 – Forms of internal separation . 14
Table BB.1 – Items subject to agreement between the ASSEMBLY manufacturer and the
user . 19

61439-2  IEC:2011 – 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
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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 17D: Low-voltage
switchgear and controlgear assemblies, of IEC technical committee 17: Switchgear and
controlgear.
This second edition cancels and replaces the first edition published in 2009. It constitutes a
technical revision.
This second edition includes the following significant technical changes with respect to the
last edition of IEC 61439-2:
• clarification of the scope;
• revision of requirements for withdrawable and removable parts;
• revision of mechanical impact test (10.2.6);
• extension of Table 101;
– 4 – 61439-2  IEC:2011
• review of Table BB.1 to reflect modified requirements and verifications;
• general editorial review.
The text of this standard is based on the following documents:
FDIS Report on voting
17D/440/FDIS 17D/445/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
This standard is to be read in conjunction with IEC 61439-1. The provisions of the general
rules dealt with in IEC 61439-1 (hereinafter referred to as Part 1) are only applicable to this
standard insofar as they are specifically cited. When this standard states “addition”,
“modification” or “replacement”, the relevant text in Part 1 is to be adapted accordingly.
Subclauses that are numbered with a 101 (102, 103, etc.) suffix are additional to the same
subclause in Part 1.
Tables and figures in this Part 2 that are new are numbered starting with 101.
New annexes in this Part 2 are lettered AA, BB, etc.
In this standard, terms written in small capitals are defined in Clause 3.
NOTE Throughout the IEC 61439 series of standards, the term ASSEMBLY (see 3.1.1 of Part 1) 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 publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
61439-2  IEC:2011 – 5 –
LOW-VOLTAGE SWITCHGEAR AND
CONTROLGEAR ASSEMBLIES –
Part 2: Power switchgear and controlgear assemblies

1 Scope
NOTE 1 Throughout this part, the abbreviation PSC-ASSEMBLY (see 3.1.101) is used for a power switchgear and
controlgear ASSEMBLY.
This part of IEC 61439 defines the specific requireme
...