IEC 61439-2:2009

IEC 61439-2
Edition 1.0 2009-01
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 1.0 2009-01
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
S
CODE PRIX
ICS 29.130.30 ISBN 978-2-88910-516-8
– 2 – 61439-2 © IEC:2009
CONTENTS
FOREWORD.3
1 Scope.5
2 Normative references .5
3 Terms and definitions .5
3.1 General terms .5
3.2 Constructional units of PSC-ASSEMBLIES .6
4 Symbols and abbreviations.7
5 Interface characteristics .7
6 Information .7
6.1 PSC-ASSEMBLY designation marking .7
7 Service conditions .8
8 Constructional requirements .8
9 Performance requirements .11
10 Design verification.11
11 Routine verifications .11
Annexes .15
Annex AA (informative) Forms of internal separations (see 8.101) .16
Annex BB (informative) Items subject to agreement between the ASSEMBLY
manufacturer and the user .19
Bibliography.22

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

61439-2 © IEC:2009 – 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
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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.
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.
The text of this standard is based on the following documents:
CDV Report on voting
17D/358/CDV 17D/363/RVC
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.

– 4 – 61439-2 © IEC:2009
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.
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 maintenance result 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:2009 – 5 –
LOW-VOLTAGE SWITCHGEAR AND
CONTROLGEAR ASSEMBLIES –
Part 2: Power switchgear and controlgear assemblies

1 Scope
This clause of Part 1 is applicable except as follows.
Addition:
This standard defines the specific requirements of power switchgear and controlgear
assemblies (PSC-ASSEMBLIES), the rated voltage of which does not exceed 1000 V a.c. or
1500 V d.c.
Throughout this part, the abbreviation PSC-ASSEMBLY is used for a power switchgear and
controlgear ASSEMBLY (see 3.1.101).
This standard does not apply to the specific types of ASSEMBLIES covered by other parts of
IEC 61439.
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
IEC 60947-3:1999, Low-voltage switchgear and controlgear – Part 3: Switchgear,
disconnectors, switch-disconnectors and fuse-combination units
IEC 61140:2001, Protection against ele
...