Low-voltage switchgear and controlgear assemblies - Part 4: Particular requirements for assemblies for construction sites (ACS)

IEC 61439-4:2012 defines the specific requirements of ACS as follows:
- ASSEMBLIES for which the rated voltage does not exceed 1 000 V in case of a.c. or 1 500 V in case of d.c.;
- ASSEMBLIES where the nominal primary voltage and the nominal secondary voltage of transformers incorporated in ACS are within the limits specified above;
- ASSEMBLIES intended for use on construction sites, both indoors and outdoors, i.e. temporary places of work to which the public do not generally have access and where building construction, installation, repairs, alteration or demolition of property (buildings) or civil engineering (public works) or excavation or any other similar operations are carried out;
- transportable (semi-fixed) or mobile ASSEMBLIES with enclosure. The manufacture and/or assembly may be carried out other than by the original manufacturer. This first edition of IEC 61439-4 cancels and replaces the second edition of IEC 60439-4 (2004), and constitutes a technical revision. This edition includes the following significant technical changes with respect to the last edition of IEC 60439-4:
- modification of the title as "Part 4: Particular requirements for assemblies for construction sites (ACS)";
- alignment on IEC 61439-1 regarding the structure and technical content, as applicable;
- to allow comparison with tested ACS.
This publication is to be read in conjunction with IEC 61439-1:2011.

Ensembles d'appareillage à basse tension - Partie 4: Exigences particulières pour ensembles de chantiers (EC)

La CEI 61439-4:2012 définit les exigences particulières de l'EC comme suit:
- ENSEMBLES dont la tension assignée ne dépasse pas 1 000 V en courant alternatif ou 1 500 V en courant continu;
- ENSEMBLES dont les valeurs nominales des tensions primaire et secondaire des appareils de transformation incorporés dans les ensembles de chantier (EC) sont dans les limites spécifiées ci-dessus;
- ENSEMBLES destinés à équiper des chantiers, à l'intérieur et à l'extérieur, c'est-à-dire des lieux de travail temporaires qui ne sont pas normalement accessibles au public et où sont exécutés des travaux de construction, d'équipement, de réparation, de modification ou de démolition d'immeubles (bâtiments) ou d'ouvrage d'art (travaux publics) ou encore des travaux de terrassement ou tout autres travaux analogues;
- ENSEMBLES de type transportable (semi-fixe) ou mobile avec enveloppe. La fabrication et/ou l'assemblage peuvent être réalisés par un constructeur autre que le constructeur d'origine. Cette première édition de la CEI 61439-4 annule et remplace la deuxième édition de la CEI 60439-4 (2004), dont elle constitue une révision technique. Cette édition inclut les modifications techniques importantes suivantes par rapport à la dernière édition de la CEI 60439-4:
- modification du titre en "Partie 4: Exigences particulières pour ensembles de chantiers (EC)";
- alignement sur la CEI 61439-1 pour ce qui concerne la structure et le contenu technique, le cas échéant;
- pour permettre la comparaison avec les EC soumis aux essais.
Cette publication doit être lue conjointement avec la CEI 61439-1:2011.

General Information

Status
Published
Publication Date
14-Nov-2012
Current Stage
PPUB - Publication issued
Start Date
15-Nov-2012
Completion Date
15-Nov-2012
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IEC 61439-4
Edition 1.0 2012-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Low-voltage switchgear and controlgear assemblies –
Part 4: Particular requirements for assemblies for construction sites (ACS)
Ensembles d'appareillage à basse tension –
Partie 4: Exigences particulières pour ensembles de chantiers (EC)
IEC 61439-4:2012
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 61439-4
Edition 1.0 2012-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Low-voltage switchgear and controlgear assemblies –
Part 4: Particular requirements for assemblies for construction sites (ACS)
Ensembles d'appareillage à basse tension –
Partie 4: Exigences particulières pour ensembles de chantiers (EC)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX U
ICS 29.130.20 ISBN 978-2-83220-466-5

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
---------------------- Page: 3 ----------------------
– 2 – 61439-4 © IEC:2012
CONTENTS

FOREWORD ........................................................................................................................... 3

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

2 Normative references ....................................................................................................... 5

3 Terms and definitions ....................................................................................................... 6

4 Symbols and abbreviations ............................................................................................... 8

5 Interface characteristics ................................................................................................... 8

6 Information ....................................................................................................................... 9

7 Service conditions .......................................................................................................... 10

8 Constructional requirements ........................................................................................... 11

9 Performance requirements ............................................................................................. 13

10 Design verification .......................................................................................................... 13

11 Routine verification ......................................................................................................... 16

101 Particular features of ACS .............................................................................................. 16

Annexes ............................................................................................................................... 19

Annex C (informative) User information template ................................................................. 19

Annex D (informative) Design verification ............................................................................ 20

Annex O (informative) Guidance on temperature rise verification ......................................... 21

Annex P (normative) Verification of the short-circuit withstand strength of busbar

structures by comparison with a tested reference design by calculation ............................... 22

Annex AA (informative) List of notes concerning certain countries ....................................... 23

Annex BB (Void) ................................................................................................................... 24

Annex CC (informative) Items subject to agreement between the ASSEMBLY

manufacturer and the user .................................................................................................... 25

Bibliography .......................................................................................................................... 29

Figure 101 – Impact test using striking element .................................................................... 15

Table 101 – Values of assumed loading ................................................................................ 18

Table D.1 – List of design verifications to be performed ........................................................ 20

Table CC.1 – Items subject to agreement between the ASSEMBLY manufacturer and the

user ...................................................................................................................................... 25

---------------------- Page: 4 ----------------------
61439-4 © IEC:2012 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOW-VOLTAGE SWITCHGEAR AND
CONTROLGEAR ASSEMBLIES –
Part 4: Particular requirements for assemblies
for construction sites (ACS)
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

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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 61439-4 has been prepared by subcommittee 17D: Low-voltage

switchgear and controlgear assemblies, of IEC technical committee 17: Switchgear and

controlgear.

This first edition of IEC 61439-4 cancels and replaces the second edition of IEC 60439-4

(2004), and constitutes a technical revision.

This edition includes the following significant technical changes with respect to the last edition

of IEC 60439-4:

• modification of the title as “Part 4: Particular requirements for assemblies for construction

sites (ACS)”

• alignment on IEC 61439-1 regarding the structure and technical content, as applicable;

• to allow comparison with tested ACS.
---------------------- Page: 5 ----------------------
– 4 – 61439-4 © IEC:2012
The text of this standard is based on the following documents:
FDIS Report on voting
17D/460/FDIS 17D/469/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 4 that are new are numbered starting with 101.
New annexes in this Part 4 are lettered AA, BB, etc.
In this standard, terms written in small capitals are defined in Clause 3.

The reader’s attention is drawn to the fact that Annex AA lists all of the “in-some-country”

clauses on differing practices of a less permanent nature relating to the subject of this

standard.

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.
---------------------- Page: 6 ----------------------
61439-4 © IEC:2012 – 5 –
LOW-VOLTAGE SWITCHGEAR AND
CONTROLGEAR ASSEMBLIES –
Part 4: Particular requirements for assemblies
for construction sites (ACS)
1 Scope

NOTE Throughout this standard, the abbreviation ACS (ASSEMBLY for construction site, see 3.1.101) is used for

a low-voltage switchgear and controlgear assembly intended for use on construction and similar sites.

This part of 61439 defines the specific requirements of ACS as follows:

– ASSEMBLIES for which the rated voltage does not exceed 1 000 V in case of a.c. or 1 500 V

in case of d.c.;

– ASSEMBLIES where the nominal primary voltage and the nominal secondary voltage of

transformers incorporated in ACS are within the limits specified above;

– ASSEMBLIES intended for use on construction sites, both indoors and outdoors, i.e.

temporary places of work to which the public do not generally have access and where

building construction, installation, repairs, alteration or demolition of property (buildings)

or civil engineering (public works) or excavation or any other similar operations are carried

out;
– transportable (semi-fixed) or mobile ASSEMBLIES with enclosure.

The manufacture and/or assembly may be carried out other than by the original manufacturer.

This standard does not apply to individual devices and self-contained components, such as

motor starters, fuse switches, electronic equipment, etc. which will comply with the relevant

product standards.

This standard does not apply to ASSEMBLIES for use in the administrative centres of

construction sites (offices, cloakrooms, ASSEMBLY rooms, canteens, restaurants, dormitories,

toilets, etc.).

Requirements for electrical protection provided by equipment manufactured according to this

International Standard are given in IEC 60364-7-704.
2 Normative references
This clause of Part 1 is applicable except as follows:
Addition:

IEC 60068-2-27:2008, Environmental testing − Part 2-27: Tests – Test Ea and guidance:

Shock

IEC 60068-2-42:2003, Environmental testing − Part 2-42: Tests – Test Kc: Sulphur dioxide

test for contacts and connections

IEC 60364-7-704:2005, Low-voltage electrical installations − Part 7-704: Requirements for

special installations or locations – Construction and demolition site installations

---------------------- Page: 7 ----------------------
– 6 – 61439-4 © IEC:2012

IEC 61140:2001, Protection against electric shock – Common aspects for installation and

equipment

IEC 61439-1:2011, Low-voltage switchgear and controlgear assemblies – Part 1: General

rules

IEC 61558-2-23, Safety of transformers, reactors, power supply units and combinations

thereof – Part 2-23: Particular requirements and tests for transformers and power supply units

for construction sites
3 Terms and definitions
This clause of Part 1 is applicable except as follows:
Additional terms:
3.1 General terms
3.1.101
low-voltage switchgear and controlgear assembly for construction sites
ACS

combination of one or several transforming or low voltage switching devices with associated

control, measuring, signalling, protective and regulating equipment complete with all their

internal electrical and mechanical connections and structural parts, designed and built for use

on all construction sites, indoors and outdoors
3.2 Constructional units of ASSEMBLIES
3.2.101
metering unit
functional unit equipped with apparatus for metering electrical energy
3.2.102
transformer unit
functional unit consisting mainly of one or several transformers
Modifications:
3.3 External design of ASSEMBLIES
3.3.1
open-type ASSEMBLY
This term of Part 1 does not apply.
3.3.2
dead-front ASSEMBLY
This term of Part 1 does not apply.
Replacements:
3.3.3
enclosed ACS

ACS which is enclosed on all sides with the possible exception of its mounting surface in such

a manner as to provide a defined degree of protection
---------------------- Page: 8 ----------------------
61439-4 © IEC:2012 – 7 –
3.3.7
box-type ACS
enclosed ACS intended:
– either to be mounted on a vertical surface;

– or to stand on a horizontal surface supported by feet or legs (articulated or not) or by a

mounting not forming part of the ACS (see 3.4.2 of Part 1)
Modifications:
3.5 Conditions of installation of ASSEMBLIES
3.5.1
ASSEMBLY for indoor installation
This term of Part 1 does not apply (see 3.1.101).
3.5.2
ASSEMBLY for outdoor installation
This term of Part 1 does not apply (see 3.1.101).
3.5.3
stationary ASSEMBLY
This term of Part 1 does not apply.
3.5.4
movable ASSEMBLY
This term of Part 1 does not apply.
Additional terms:
3.5.101
transportable ACS
semi-fixed ACS

ACS intended for use in a place where it is not permanently fixed; its location may vary during

work on the same site. When the equipment is to be moved to another place, it is first

disconnected from the supply
3.5.102
mobile ACS

ACS capable of being moved as work advances on the site, without being disconnected from

the supply
Additional terms:
3.101 Function of the ACS
3.101.1
incoming supply function

suitability for connection of the ACS either to electricity public supply network or to the

transformer substation or to on site generator
3.101.2
metering function
suitability for the metering of electrical energy consumed on the site
---------------------- Page: 9 ----------------------
– 8 – 61439-4 © IEC:2012
3.101.3
distribution function

suitability to provide the distribution and protection of electrical supply on the construction site

by means of terminal connection or socket-outlets
3.101.4
transformer function

suitability to provide means for transformer voltages or to provide measures of electrical

protection
Note 1 to entry: Details for their requirements are given in 101.1.
4 Symbols and abbreviations
This clause of Part 1 is applicable.
5 Interface characteristics
This clause of Part 1 is applicable except as follows.
5.3.1 Rated current of the ASSEMBLY (I )
Replacement of title and text:
5.3.1 Rated current of an ACS (I )
The rated current of an ACS is that of its incoming circuit.

This current shall be carried without the temperature rise of the individual parts exceeding the

limits specified in 9.2 of Part 1.
5.4 Rated diversity factor (RDF)
Addition:
ACS or group of outgoing circuits shall be
The assumed loading of the outgoing circuits of the

declared by the ASSEMBLY manufacturer, and may be based on the values in Table 101.

When the manufacturer does not declare any RDF the values of Table 101 apply.
5.6 Other characteristics
Replacement:
The following characteristics shall be declared:
a) the function(s) assigned by the manufacturer (see 3.101);
b) the external design (see 3.3);
c) the mobility (see 3.5.101 and 3.5.102);
d) the degree of protection (see 8.2);

e) the method of mounting, for example fixed or removable parts (see 8.5.1 and 8.5.2);

f) protection against electric shock (see 8.4);
g) the resistance to corrosion (see 10.2.2.101);
h) special service conditions, if applicable (see 7.2);
---------------------- Page: 10 ----------------------
61439-4 © IEC:2012 – 9 –
i) electromagnetic compatibility (EMC) classification (see Annex J of Part 1).
6 Information
This clause of Part 1 is applicable except as follows.
6.1 ASSEMBLY designation marking
Replacement of title and text:
6.1 ACS designation marking

The ASSEMBLY manufacturer shall provide each ACS with one or more labels, marked in a

durable manner and located in a place such that they are visible and legible when the ACS is

installed and in operation.
Compliance is checked according to the test of 10.2.7 and by inspection.
The following information regarding the ACS shall be provided on the label(s):
a) ASSEMBLY manufacturer's name or trade mark (see 3.10.2);

b) type designation or identification number or any other means of identification, making it

possible to obtain relevant information from the ASSEMBLY manufacturer;
c) means of identifying date of manufacture;
d) IEC 61439-4;
e) type of current (and the frequency in the case of a.c.);
f) rated voltage (U ) (of the ACS) (see 5.2.1);
g) rated current of the ACS (I ) (see 5.3.1);
h) degree of protection (see 8.2);
i) the weight where this exceeds 30 kg.

If the indication of the name or trademark of the manufacturer appears on the ACS it need not

be given on the nameplate.
ASSEMBLY
6.2.1 Information relating to the
Replacement of title and text:
6.2.1 Information relating to the ACS

The following additional information, where applicable, shall be provided in the ASSEMBLY

manufacturer’s technical documentation supplied with the ACS:
a) rated operational voltage (U ) (of a circuit) (see 5.2.2);
b) rated impulse withstand voltage (U ) (see 5.2.4);
imp
c) rated insulation voltage (U ) (see 5.2.3);
d) rated current of each circuit (I ) (see 5.3.2);
e) rated peak withstand current (I ) (see 5.3.4);

f) rated short-time withstand current (I ) together with its duration (see 5.3.4);

g) rated conditional short-circuit current (I ) (see 5.3.5);
h) rated frequency (f ) (see 5.5);
i) rated diversity factor(s) (RDF) (see 5.4);
j) functions (see 3.101);
---------------------- Page: 11 ----------------------
– 10 – 61439-4 © IEC:2012

k) all necessary information relating to the other declared classifications and characteristics

(see 5.6);

l) the short-circuit withstand strength and characteristics of short-circuit protective device(s)

(see 9.3.2);
m) overall dimensions (including projections e.g handles, covers, doors).
6.2.2 Instructions for handling, installation, operation and maintenance
Addition:

The manufacturer of the ACS should specify in its technical documentation supplied with the

ACS the other types of assemblies which may be connected to it. This information should

indicate whether the compatibility is based upon the type of system earthing employed and/or

on the need for co-ordination of the electrical protection within the complete installation.

The manufacturer should furnish the appropriate documentation for the purpose to maintain

the protective measures and the co-ordination of the protective devices within the complete

installation.
7 Service conditions
This clause of Part 1 is applicable except as follows.
Modifications:
7.1.1 Ambient air temperature
This subclause of Part 1 is not applicable.
Replacement of title and text:
7.1.1 Ambient air temperature for ACS installations

The ambient air temperature does not exceed +40 °C and its average over a period of 24 h

does not exceed +35 °C.
The lower limit of the ambient air temperature is –25 °C.
7.1.2 Humidity conditions
This subclause of Part 1 is not applicable.
Replacement of title and text:
7.1.2 Humidity conditions for ACS installations

The relative humidity may temporarily be as high as 100 % at a maximum temperature of

+25 °C.
7.1.3 Pollution degree
Replacement of the last paragraph with:
Only pollution degrees 3 and 4 are applicable.

The micro environment may be reduced to pollution degree 2 if the degree of protection of the

enclosure is at least IP5X and care is taken to avoid condensation.
---------------------- Page: 12 ----------------------
61439-4 © IEC:2012 – 11 –
7.2 Special service conditions
Addition of the following new item:
m) heavily polluted atmosphere.
8 Constructional requirements
This clause of Part 1 is applicable except as follows.
8.1.1 General
Addition:

All the apparatus shall be placed inside the enclosure fitted with such removable panels,

cover plates or doors as may be required for connection or maintenance with the possible

exception of the items mentioned in 8.101 provided that they withstand the service conditions

of Clause 7 and the requirements of 8.1.2 and 8.1.6.
8.1.2 Protection against corrosion
Replacement:

Protection against corrosion shall be ensured by the use of suitable materials or by protective

coatings to the exposed surface taking account of the normal service conditions (see 7.1)

and/or special service condition (see 7.2). Compliance to this requirement is checked by the

test of 10.2.2.
8.1.4 Resistance to ultra-violet radiation
Replacement:

For enclosures and external parts made of insulating materials, resistance to ultra-violet

radiation shall be verified according to 10.2.4.

For external parts made of insulating material of components covered by other IEC standard

(for examples socket-outlets, handles of switch, push buttons etc) this test is not required.

8.1.5 Mechanical strength
Addition:

The ACS shall be constructed to withstand mechanical shocks having an acceleration of

500 m/s , a pulse shape of a half-sine wave of 11 ms duration (commensurate with equipment

being carried loose in normal road or rail vehicles for long periods).
Compliance is verified according to 10.2.6.
8.1.6 Lifting provision
Replacement:

Lifting rings and/or handles (or any other equivalent system) shall be provided on the ACS

and be firmly attached to the enclosure or supporting framework.
Compliance is checked according to the test of 10.2.5.
---------------------- Page: 13 ----------------------
– 12 – 61439-4 © IEC:2012
8.2.1 Protection against mechanical impact
Additional paragraph:

The ACS shall also withstand impacts of 6 joules energy representing collisions with site

construction mechanical handling equipment (see IEC 60068-2-27).
For protection against mechanical impact refer to 10.2.6.

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

water
Replacement:

The degree of protection provided by an ACS against contact with live parts, ingress of solid

foreign bodies and water is indicated by the IP code according to IEC 60529 and verified

according to 10.3.

The degree of protection of the ACS shall be at least IP 44, with all doors closed and all

removable panels and cover plates fitted.
Ventilation and drainage holes shall not reduce this degree of protection.

The degree of protection for an operating face inside a door shall be not less than IP 21

provided that the door can be closed under all conditions of use. Where the door cannot be

closed the degree of protection for the operating face shall be at least IP 44.

Unless otherwise specified, the degree of protection indicated by the original manufacturer

applies to the complete ACS, when it is installed in accordance with the
...

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