IEC 61439-5:2010
(Main)Low-voltage switchgear and controlgear assemblies - Part 5: Assemblies for power distribution in public networks
Low-voltage switchgear and controlgear assemblies - Part 5: Assemblies for power distribution in public networks
IEC 61439-5:2010 gives specific requirements for public electricity network distribution assemblies (PENDAs), which are stationary assemblies verified by verification tests, as defined in this standard. These ASSEMBLIES are used for the distribution of electrical energy in three-phase systems (see Figure 101 for a typical distribution network). Open type ASSEMBLIES are not covered by this standard. This first edition of IEC 61439-5 cancels and replaces the second edition of IEC 60439-5 (2006), and constitutes a technical revision. This edition of IEC 61439-5 includes the following significant technical changes with respect to the latest edition of IEC 60439-5:
- alignment on IEC 61439-1 regarding the structure and technical content, as applicable;
- introduction of new verifications, accordingly;
- harmonisation of the requirements of substation cable distribution boards and cable distribution cabinets, thereby eliminating the need to identify and define two catagories of assembly;
- simpler standard as a result of a reduction in the number of assembly types defined and the acronyms used to identify the different assemblies.
This publication is to be read in conjunction with IEC 61439-1:2009.
Ensembles d'appareillage à basse tension - Partie 5: Ensembles pour réseaux de distribution publique
La CEI 61439-5:2010 définit des exigences spécifiques aux ensembles pour réseaux de distribution publique (ERD) qui sont fixes et vérifiés par des essais de vérification comme défini dans la présente norme. Ces ENSEMBLES sont utilisés pour la distribution de l'énergie électrique dans des systèmes triphasés (voir Figure 101 représentant un réseau de distribution classique). Les ENSEMBLES ouverts ne sont pas couverts par la présente norme. Cette première édition de la CEI 61439-5 annule et remplace la seconde édition de la CEI 60439-5 (2006), et constitue une révision technique. La présente édition de la CEI 61439-5 inclut les modifications techniques significatives suivantes par rapport à la dernière édition de la CEI 60439-5:
- alignement sur la CEI 61439-1 en ce qui concerne la structure et le contenu technique, s'il y a lieu;
- introduction de nouvelles vérifications, en conséquence;
- harmonisation des exigences relatives aux tableaux de distribution par câbles pour poste (SCDB) et aux ensembles d'appareillage pour réseaux de distribution (ERD) éliminant ainsi la nécessité d'identifier et de définir deux catégories d'ensembles;
- norme simplifiée en raison de la réduction du nombre de types d'ensembles définis et des acronymes utilisés pour identifier les différents ensembles.
Cette publication doit être lue conjointement avec l'IEC 61439-1:2009.
General Information
Relations
Standards Content (Sample)
IEC 61439-5
®
Edition 1.0 2010-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Low-voltage switchgear and controlgear assemblies –
Part 5: Assemblies for power distribution in public networks
Ensembles d'appareillage à basse tension –
Partie 5: Ensembles pour réseaux de distribution publique
IEC 61439-5:2010
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2010 IEC, Geneva, Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by
any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or
IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de la CEI ou du Comité national de la CEI du pays du demandeur.
Si vous avez des questions sur le copyright de la CEI ou si vous désirez obtenir des droits supplémentaires sur cette
publication, utilisez les coordonnées ci-après ou contactez le Comité national de la CEI de votre pays de résidence.
IEC Central Office
3, rue de Varembé
CH-1211 Geneva 20
Switzerland
Email: inmail@iec.ch
Web: www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
§ Catalogue of IEC publications: www.iec.ch/searchpub
The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,…).
It also gives information on projects, withdrawn and replaced publications.
§ IEC Just Published: www.iec.ch/online_news/justpub
Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available
on-line and also by email.
§ Electropedia: www.electropedia.org
The world's leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions
in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical
Vocabulary online.
§ Customer Service Centre: www.iec.ch/webstore/custserv
If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service
Centre FAQ or contact us:
Email: csc@iec.ch
Tel.: +41 22 919 02 11
Fax: +41 22 919 03 00
A propos de la CEI
La Commission Electrotechnique Internationale (CEI) est la première organisation mondiale qui élabore et publie des
normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.
A propos des publications CEI
Le contenu technique des publications de la CEI est constamment revu. Veuillez vous assurer que vous possédez
l’édition la plus récente, un corrigendum ou amendement peut avoir été publié.
§ Catalogue des publications de la CEI: www.iec.ch/searchpub/cur_fut-f.htm
Le Catalogue en-ligne de la CEI vous permet d’effectuer des recherches en utilisant différents critères (numéro de référence,
texte, comité d’études,…). Il donne aussi des informations sur les projets et les publications retirées ou remplacées.
§ Just Published CEI: www.iec.ch/online_news/justpub
Restez informé sur les nouvelles publications de la CEI. Just Published détaille deux fois par mois les nouvelles
publications parues. Disponible en-ligne et aussi par email.
§ Electropedia: www.electropedia.org
Le premier dictionnaire en ligne au monde de termes électroniques et électriques. Il contient plus de 20 000 termes et
définitions en anglais et en français, ainsi que les termes équivalents dans les langues additionnelles. Egalement appelé
Vocabulaire Electrotechnique International en ligne.
§ Service Clients: www.iec.ch/webstore/custserv/custserv_entry-f.htm
Si vous désirez nous donner des commentaires sur cette publication ou si vous avez des questions, visitez le FAQ du
Service clients ou contactez-nous:
Email: csc@iec.ch
Tél.: +41 22 919 02 11
Fax: +41 22 919 03 00
---------------------- Page: 2 ----------------------
IEC 61439-5
®
Edition 1.0 2010-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Low-voltage switchgear and controlgear assemblies –
Part 5: Assemblies for power distribution in public networks
Ensembles d'appareillage à basse tension –
Partie 5: Ensembles pour réseaux de distribution publique
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
U
CODE PRIX
ICS 29.130.20 ISBN 978-2-88912-266-0
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – 61439-5 Ó IEC:2010
CONTENTS
FOREW ORD . 3
1 Sc o pe . 5
2 Normative references . 6
3 Terms and definitions . 6
4 Symbols and abbreviations . 7
5 Interface characteristics . 7
6 Information . 7
7 Service conditions . 8
8 Constructional requirements . 8
9 Performance requirements. 11
10 Design verification . 11
11 Routine verification . 24
Annex AA (normative) Cross-section of conductors . 25
Figure 101 – Typical distribution network . 5
Figure 102 – Diagram of test to verify resistance to shock load of a PENDA-O. 14
Figure 103 – Diagram of test to verify impact force withstand of a PENDA-O . 15
Figure 104 – Diagram of test to verify the resistance to static load. 16
Figure 105 – Sandbag for test to verify the resistance to shock load . 17
Figure 106 – Diagram of test to verify resistance to torsional stress of a PENDA-O . 18
Figure 107 – Diagram of test to verify the mechanical strength of doors . 21
Figure 108 – Striker element for test of resistance to mechanical shock impacts
induced by sharp-edged objects . 22
Figure 109 – Typical test arrangement for mechanical strength of base . 23
Table 101 – Values of assumed loading . 7
Table 102 – Axial load to be applied to the inserts . 21
Table AA.1 – Minimum and maximum cross-section of copper and aluminium
conductors, suitable for connection (see 8.8). 25
Table AA.2 – Standard cross-sections of round copper conductors and approximate
2
relationship between mm and AWG/kcmil sizes (see 8.8 of Part 1) . 26
---------------------- Page: 4 ----------------------
61439-5 Ó IEC:2010 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR ASSEMBLIES –
Part 5: Assemblies for power distribution in public networks
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 61439-5 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 61439-5 cancels and replaces the second edition of IEC 60439-5
(2006), and constitutes a technical revision.
This edition of IEC 61439-5 includes the following significant technical changes with respect
to the latest edition of IEC 60439-5:
– alignment on IEC 61439-1 regarding the structure and technical content, as applicable;
– introduction of new verifications, accordingly;
– harmonisation of the requirements of substation cable distribution boards and cable
distribution cabinets, thereby eliminating the need to identify and define two catagories of
assembly;
– simpler standard as a result of a reduction in the number of assembly types defined and
the acronyms used to identify the different assemblies.
---------------------- Page: 5 ----------------------
– 4 – 61439-5 Ó IEC:2010
The text of this standard is based on the following documents:
FDIS Report on voting
17D/422/FDIS 17D/430/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 5 that are new are numbered starting with 101.
New annexes in this Part 5 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 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 ----------------------
61439-5 Ó IEC:2010 – 5 –
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR ASSEMBLIES –
Part 5: Assemblies for power distribution in public networks
1 Scope
This clause of Part 1 applies with the following additions.
Addition:
This standard gives specific requirements for public electricity network distribution assemblies
(PENDAs), which are stationary assemblies verified by verification tests, as defined in this
standard. These ASSEMBLIES are used for the distribution of electrical energy in three-phase
systems (see Figure 101 for a typical distribution network). Open type ASSEMBLIES are not
covered by this standard.
PENDA-I or PENDA-O
PENDA-O
Customers
MV/LV substation
Connecting points
IEC 2568/10
Figure 101 – Typical distribution network
The object of this standard is to state the definitions and to specify the service conditions,
construction requirements, technical characteristics and tests for PENDAs. Network
parameters may require tests at higher performance levels.
NOTE 1 If a PENDA is equipped with additional equipment (for example meters), in such a way that the main
function is changed considerably, then other standards may also apply as agreed between user and manufacturer
(see 8.5).
NOTE 2 Where local regulations and practices permit, a PENDA according to this standard may be used in other
than public networks.
PENDAs are suitable for installation in places where only skilled persons have access for
their use, however, outdoor types may be installed in situations that are accessible to ordinary
persons.
---------------------- Page: 7 ----------------------
– 6 – 61439-5 Ó IEC:2010
2 Normative references
This clause of Part 1 applies with the following additions.
Addition:
IEC 60269-1, Low-voltage fuses – Part 1: General requirements
IEC 60695-11-10:1999, Fire hazard testing – Part 11-10: Test flames – 50 W horizontal and
vertical flame test methods
IEC 61439-1:2009, Low-voltage switchgear and controlgear assemblies – Part 1: General
rules
ISO 6506-1, Metallic materials – Brinell hardness test – Part 1: Test method
ISO 9223:1992, Corrosion of metals and alloys – Corrosivity of atmospheres – Classification
3 Terms and definitions
This clause of Part 1 applies with the following modifications.
3.1 General terms
Additional terms:
3.1.101
public electricity network distribution ASSEMBLY
PENDA
ASSEMBLY, generally for installation in a public electricty network which in use, receives
electrical energy from one or more supplies and distributes that energy through one or more
cables to other equipment
NOTE 1 A PENDA is installed, operated and maintained solely by skilled persons.
NOTE 2 Some forms of a PENDA were previoulsy known as a cable distribution cabinet (CDC).
3.1.101.1
outdoor public electricity network distribution ASSEMBLY
PENDA-O
cubicle type public electricity network distribution ASSEMBLY that is suitable for outdoor
installation in places that may, or may not, be accessible to the public
3.1.101.2
indoor public electricity network distribution ASSEMBLY
PENDA-I
public electricity network distribution ASSEMBLY suitable for installation indoors, generally
without an enclosure, but including all structural parts necessary to support busbars,
functional units and other ancillary devices, necessary to complete the ASSEMBLY
3.3 External design of ASSEMBLIES
3.3.1
open-type ASSEMBLY
This term of Part 1 does not apply.
---------------------- Page: 8 ----------------------
61439-5 Ó IEC:2010 – 7 –
3.9 Verification
This subclause of Part 1 applies with the following modifications.
Modifications:
3.9.1
design verification
The note is not applicable, the only method of verification permitted for a PENDA is by test(s)
made in accordance with Clause 10 of this standard.
3.9.3
verification assessment
Not applicable for PENDAs complying with this standard.
3.9.4
design rule
Not applicable for PENDAs complying with this standard.
4 Symbols and abbreviations
This clause of Part 1 applies.
5 Interface characteristics
This clause of Part 1 applies with the following modifications.
5.3.3 Rated diversity factor (RDF)
Addition:
In the absence of an agreement between the ASSEMBLY manufacturer and user concerning the
actual load currents, the assumed loading of the outgoing circuits of the ASSEMBLY or group of
outgoing circuits may be based on the values given in Table 101.
Table 101 – Values of assumed loading
Number of main circuits Assumed loading factor
2 and 3 0,9
4 and 5 0,8
6 to 9 inclusive 0,7
10 (and above) 0,6
6 Information
This clause of Part 1 applies with the following modifications.
6.1 ASSEMBLY designation marking
Addition to first paragraph:
Designation plates may be placed inside an enclosure of an ASSEMBLY provided their intended
place ensures good legibility and visibility when the door(s) is open or the cover is removed.
---------------------- Page: 9 ----------------------
– 8 – 61439-5 Ó IEC:2010
Replacement of item d):
d) IEC 61439-5.
Replacement of the note:
NOTE Further information may be included by agreement between the user and the manufacturer.
6.3 Device and/or component identification
Additional paragraph:
In the case of removeable fuse-carriers which are specific to a fuseway, a label shall be
placed on the fuse carrier as well as on the fuse base, to avoid incorrect interchangeability of
the fuse-carrier.
Additional subclause:
6.101 Circuit identification
It shall be possible to identify each functional unit in a clearly visible manner.
7 Service conditions
This clause of Part 1 applies with the following modifications.
7.1.1.2 Ambient air temperature for outdoor installations
Replacement of last paragraph with:
Unless the user specifies a PENDA shall be suitable for use in an arctic climate, the lower
limit of ambient air temperature is –25 °C. For an arctic climate the lower limit of ambient
temperature is –50 °C.
7.2 Special service conditions
Addition of the following note to item h):
NOTE Exposure to vibration arising from traffic and/or occasional ground excavation is a normal service condition
for PENDAs.
Additional paragraph:
Additional requirements for a PENDA-O, to be installed where heavy snowfalls occur and
where they are adjacent to areas where there is snow clearance by ploughing, are subject to
agreement between manufacturer and user.
8 Constructional requirements
This clause of Part 1 applies with the following modifications.
8.1 Strength of materials and parts
8.1.1 General
Addition:
---------------------- Page: 10 ----------------------
61439-5 Ó IEC:2010 – 9 –
A PENDA-O shall be arranged for ground mounting, transformer mounting, pole mounting,
surface wall mounting or mounting within a recess within a wall, as agreed between user and
manufacturer.
A PENDA may be direct coupled to a transformer by means of a flange coupling or it may
connect to its supply by means of cable or via busbars as agreed between user and
manufacturer. Outgoing circuits shall be suitable for connection by means of cables.
A reliable locking device shall be provided on outdoor enclosures which prevents access by
unauthorized persons. Doors, lids and covers shall be so designed that, after they are locked,
they do not open due to subsequent moderate ground settlement, nor due to exposure to
vibration arising from traffic and/or ground excavation and reinstatement works.
8.1.5 Resistance of insulating materials to heat and fire
Additional subclause:
8.1.5.101 Verification of category of flammability
The insulating materials used for enclosures, barriers and other insulating parts shall have
flame retardant properties in accordance with 10.2.3.102 of this standard.
8.1.6 Mechanical strength
Additional subclause:
8.1.6.101 Verification of mechanical strength
The mechanical properties of a PENDA-O shall comply with 10.2.101 of this standard.
Parts of the PENDA-O intended to be embedded in the ground shall withstand the stresses
imposed on them during installation and normal service and comply with 10.2.101.6.
Additional subclause:
8.1.101 Thermal stability
The thermal stability of a PENDA shall be verified according to 10.2.3.101.
8.2 Degree of protection provided by an ASSEMBLY enclosure
8.2.1 Protection against mechanical impact
Subclause 8.2.1 of Part 1 does not apply.
8.2.2 Protection against contact with live parts, ingress of solid foreign bodies and
liquids
Addition:
Open type ASSEMBLIES (IP 00) are not covered by this standard.
When a PENDA-O is intended to be installed in places accessible to the public, its enclosure
shall, when fully-installed in accordance with the manufacturer’s instructions, provide a
degree of protection of at least IP 34D according to IEC 60529. In other locations, the
minimum level of protection shall be at least IP33.
---------------------- Page: 11 ----------------------
– 10 – 61439-5 Ó IEC:2010
PENDA-O’s that are intended to be installed in places accessible to the public shall, unless
otherwise stated by the user, be designed such that when any temporary cables are
connected, the enclosure shall provide a degree of protection of at least IP 23C according to
IEC 60529. See 8.8 of this standard.
8.4 Protection against electric shock
8.4.2.1 General
The third paragraph does not apply.
Additional subclause:
8.4.2.101 Earthing and short-circuiting means
The outgoing units in an ASSEMBLY shall be so constructed that they can be earthed and short-
circuited in a secure manner by means of a device(s) recommended by the manufacturer,
which ensures the manufacturer’s indicated degree of protection (IP code) is maintained for
all parts of the ASSEMBLY. This requirement is not applicable if it could cause a safety hazard
arising from the system conditions and/or operational practice.
8.4.3.1 Installation conditions
Additional paragraph:
For an ASSEMBLY that is expected to feed overhead cable lines, outgoing units shall be
designed in such a way that an attached cable(s) can be earthed at the termination(s).
8.5 Incorporation of switching devices and components
Additional paragraph:
Individual components, such as fuses and switching devices that are in compliance with
others standards, shall also comply with the supplementary requirements of this standard.
8.5.3 Selection of switching devices and components
Additional paragraph:
Fuses shall comply with the general requirements of IEC 60269-1 or with the relevant national
standard where it is an established practice for such use.
8.8 Terminals for external conductors
Replacement of the first three paragraphs with the following:
In the absence of a special agreement between user and manufacturer, terminals shall be
capable of accommodating cables having copper or aluminium conductors from the smallest
to the largest cross-sectional area corresponding to the appropriate rated current (see
Table AA.1).
The terminations for outgoing circuits shall be located so that adequate spacing is provided
and to facilitate terminating the phase conductors of a cable irrespective of their lay.
Where specified by the user, the incoming circuit shall be suitable for connection by means of
either bare or insulated bars.
Additional subclauses:
---------------------- Page: 12 ----------------------
61439-5 Ó IEC:2010 – 11 –
8.101 Marking as an obstacle to snow clearance
Where a PENDA-O is intended for use in regions where heavy snowfalls occur in accordance
with 7.2, or alternatively, if required by the user, it shall be possible to mark it as an obstacle
to snow clearance. Holders shall be provided, attached to the PENDA-O, to accommodate
marking rods and it shall be possible to install and make adjustments to the position of the
marking rod from outside the PENDA. The holders shall be constructed in a manner which
ensures that the holder or marking rod will give way to a mechanical force before the
transmitted force to the PENDA-O’s enclosure reaches the value which would adversely affect
the degree of protection (IP code).
8.102 Ease of operation and maintenance
All parts of the ASSEMBLY shall, as far as practicable, be readily accessible and replaceable
without excessive dismantling. The conditions for interchangeability of parts of the ASSEMBLY
may be subject to an agreement between the user and the manufacturer.
The design shall be such that the cables can be readily connected from the front.
When an PENDA does not have a means of measurement incorporated, it shall be possible,
by the use of a portable instrument, to readily and safely measure voltages in all phases of
incoming units and on both sides of all current breaking and/or switch devices of outgoing
units, also the current in one phase of all outgoing units. During this operation all live parts of
the PENDA shall be protected sufficiently to retain the required degree of protection in
accordance with 8.2. Instructions concerning the procedure to be adopted shall be provided
by the manufacturer.
If the ASSEMBLY is intended to be connected to a live reserve power, for example a standby
generator, the switchgear connecting device shall be designed so that connection can be
made with the live parts having a degree of protection of IP 10 according to IEC 60529.
Locking arrangements shall be provided on a PENDA to secure the door(s) and prevent
unauthorised access. The fixings of any covers etc. which are removable for installation or
maintenance operations shall only be accessible while the door(s) are open.
9 Performance requirements
This clause of Part 1 applies.
10 Design verification
This clause of Part 1 applies with the following modifications.
10.1 General
nd
Delete from the 2 paragraph:
‘prior to the publication of the relevant product standard in the IEC 61439 series,’
th
Replacement of 4 paragraph with:
Design verification shall only be achieved by the application of tests in accordance with
Clause 10 of this standard. Alternatives methods of verification by calculation and validation
of design rules are not applicable to PENDAs complying with this standard.
Additional last paragraph:
---------------------- Page: 13 ----------------------
– 12 – 61439-5 Ó IEC:2010
Where necessary to suit their particular network parameters, users may specify more onerous
or additional test requirements.
10.2 Strength of materials and parts
10.2.2 Resistance to corrosion
10.2.2.1 Test procedure
Replacement of last paragraph with the following:
When the corrosion resistance properties and projected life, as agreed between manufacturer
and user, can be confirmed by reference to ISO 9223, the tests detailed herein need not be
performed.
In all other cases the corrosion resistance of each design of ASSEMBLY shall be verified by
severity test A or B, as applicable and as detailed in 10.2.2.2 and 10.2.2.3 of Part 1.
10.2.2.2 Severity test A
R
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.