Low-voltage switchgear and controlgear assemblies - Part 2: Power switchgear and controlgear assemblies

IEC 61439-2:2011 defines the specific requirements of power switchgear and controlgear assemblies (PSC-ASSEMBLIES) 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.; - stationary or movable ASSEMBLIES with or without enclosure; - ASSEMBLIES intended for use in connection with the generation, transmission, distribution and conversion of electric energy, and for the control of electric energy consuming equipment; - ASSEMBLIES designed for use under special service conditions, for example in ships and in rail vehicles provided that the other relevant specific requirements are complied with; - ASSEMBLIES designed for electrical equipment of machines. Supplementary requirements for ASSEMBLIES forming part of a machine are covered by the IEC 60204 series. 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; - review of Table BB.1 to reflect modified requirements and verifications; - general editorial review. This publication is to be read in conjunction with IEC 61439-1:2009.

Niederspannungs-Schaltgerätekombinationen - Teil 2: Energie-Schaltgerätekombinationen

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

La CEI 61439-2:2011 définit les exigences spécifiques applicables aux ensembles d'appareillage de puissance (ENSEMBLES EAP) comme suit: - ENSEMBLES dont la tension assignée ne dépasse pas 1 000 V en courant alternatif ou 1 500 V en courant continu; - ENSEMBLES fixes ou mobiles avec ou sans enveloppe; - ENSEMBLES destinés à être utilisés avec des équipements conçus pour la production, le transport, la distribution et la conversion de l'énergie électrique et la commande des matériels consommant de l'énergie électrique; - ENSEMBLES conçus pour être utilisés dans des conditions spéciales d'emploi, par exemple à bord de navires et de véhicules sur rails, à condition que les autres exigences spécifiques correspondantes soient respectées; - ENSEMBLES conçus pour le matériel électrique des machines. Les exigences supplémentaires pour les ENSEMBLES faisant partie d'une machine sont couvertes par la série CEI 60204. Cette seconde édition annule et remplace la première édition publiée en 2009, dont elle constitue une révision technique. Cette deuxième édition inclut les modifications techniques importantes suivantes par rapport à la dernière édition de la CEI 61439-2: - clarification du domaine d'application; - révision des exigences pour les parties débrochables et amovibles; - révision de l'essai d'impact mécanique (10.2.6); - extension du Tableau 101; - revue du Tableau BB.1 pour refléter les exigences et les vérifications modifiées; - revue générale de la formulation du texte. Cette publication doit être lue conjointement avec la CEI 61439-1:2009.

Sestavi nizkonapetostnih stikalnih in krmilnih naprav - 2. del: Sestavi močnostnih stikalnih in krmilnih naprav (IEC 61439-2:2011)

Ta del standarda IEC 61439 določa posebne zahteve za sestave močnostnih stikalnih in krmilnih naprav (PSC-SESTAVI): – SESTAVI, katerih nazivna napetost ne presega 1000 V v primeru izmenične napetosti ali 1500 V v primeru enosmerne napetosti; – stacionarni ali premični SESTAVI z ohišjem ali brez; – SESTAVI, namenjeni za uporabo na področju proizvodnje, prenosa, distribucije in pretvarjanja električne energije ter za nadzor opreme, ki uporablja električno energijo; – SESTAVI, namenjeni za uporabo v posebnih pogojih obratovanja, na primer na ladjah in železniških vozilih, pod pogojem da so izpolnjene druge ustrezne specifične zahteve; – SESTAVI za električno opremo strojev. Dodatne zahteve za SESTAVE, ki so del stroja, zajema skupina standardov IEC 60204. Ta standard se uporablja za vse SESTAVE, ne glede na to, ali so oblikovani, proizvedeni in preverjani enkratno ali v celoti standardizirani in proizvedeni v velikih količinah. Proizvodnja in/ali sestavljanje lahko izvaja oseba, ki ni prvotni proizvajalec (glej 3.10.1). Ta standard ne velja za posamezne naprave in avtonomne sestavne dele, kot so zaganjalniki motorjev, varovalčna stikala, elektronska oprema itd., ki je skladna z ustreznimi standardi za izdelke. Ta standard ne velja za posebne vrste SESTAVOV, ki jih zajemajo drugi deli standarda IEC 61439. Za SESTAVE, ki niso zajeti v drugih delih, velja ta del.

General Information

Status
Published
Publication Date
27-Oct-2011
Current Stage
6060 - Document made available
Due Date
23-Dec-2011
Completion Date
28-Oct-2011

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SLOVENSKI STANDARD
SIST EN 61439-2:2012
01-april-2012
1DGRPHãþD
SIST EN 61439-2:2010

6HVWDYLQL]NRQDSHWRVWQLKVWLNDOQLKLQNUPLOQLKQDSUDYGHO6HVWDYLPRþQRVWQLK

VWLNDOQLKLQNUPLOQLKQDSUDY ,(&
Low-voltage switchgear and controlgear assemblies - Part 2: Power switchgear and
controlgear assemblies (IEC 61439-2:2011)
Niederspannungs-Schaltgerätekombinationen - Teil 2: Energie-
Schaltgerätekombinationen (IEC 61439-2:2011)
Ensembles d'appareillage à basse tension - Partie 2: Ensembles d'appareillage de
puissance (CEI 61439-2:2011)
Ta slovenski standard je istoveten z: EN 61439-2:2011
ICS:
29.130.20 Nizkonapetostne stikalne in Low voltage switchgear and
krmilne naprave controlgear
SIST EN 61439-2:2012 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 61439-2:2012
---------------------- Page: 2 ----------------------
SIST EN 61439-2:2012
EUROPEAN STANDARD
EN 61439-2
NORME EUROPÉENNE
October 2011
EUROPÄISCHE NORM
ICS 29.130.20 Supersedes EN 61439-2:2009
English version
Low-voltage switchgear and controlgear assemblies -
Part 2: Power switchgear and controlgear assemblies
(IEC 61439-2:2011)
Ensembles d'appareillage Niederspannungs-
à basse tension - Schaltgerätekombinationen -
Partie 2: Ensembles d'appareillage de Teil 2: Energie-
puissance Schaltgerätekombinationen
(CEI 61439-2:2011) (IEC 61439-2:2011)

This European Standard was approved by CENELEC on 2011-09-23. CENELEC members are bound to comply

with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard

the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on

application to the CEN-CENELEC Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other

language made by translation under the responsibility of a CENELEC member into its own language and notified

to the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,

the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,

Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,

Spain, Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 61439-2:2011 E
---------------------- Page: 3 ----------------------
SIST EN 61439-2:2012
EN 61439-2:2011 - 2 -
Foreword

The text of document 17D/440/FDIS, future edition 2 of IEC 61439-2, prepared by SC 17D, "Low-voltage

switchgear and controlgear assemblies", of IEC/TC 17, "Switchgear and controlgear" was submitted to

the IEC-CENELEC parallel vote and approved by CENELEC as EN 61439-2:2011.
The following dates are fixed:
(dop) 2012-06-23
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2014-09-23
standards conflicting with the
document have to be withdrawn
This document supersedes EN 61439-2:2009.

EN 61439-2:2011 includes the following significant technical changes with respect to EN 61439-2:2009:

— clarification of the scope;
— revision of requirements for withdrawable and removable parts;
— revision of mechanical impact test (10.2.6);
— extension of Table 101;
— review of Table BB.1 to reflect modified requirements and verifications;
— general editorial review.

This standard is to be read in conjunction with EN 61439-1. The provisions of the general rules dealt with

in EN 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 EN 61439 series of standards, the term ASSEMBLY (see 3.1.1 of Part 1) is used for a low-voltage switchgear

and controlgear assembly.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent

rights.

This document has been prepared under a mandate given to CENELEC by the European Commission

and the European Free Trade Association, and supports essential requirements of EU Directive(s).

For the relationship with EU Directive see informative Annex ZZ, which is an integral part of this

document.
Endorsement notice

The text of the International Standard IEC 61439-2:2011 was approved by CENELEC as a European

Standard without any modification.
---------------------- Page: 4 ----------------------
SIST EN 61439-2:2012
- 3 - EN 61439-2:2011
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. For dated

references, only the edition cited applies. For undated references, the latest edition of the referenced

document (including any amendments) applies.

NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD

applies.
Addition to Annex ZA of EN 61439-1:
Publication Year Title EN/HD Year
IEC 60947-3 2008 Low-voltage switchgear and controlgear - EN 60947-3 2009
Part 3: Switches, disconnectors, switch-
disconnectors and fuse-combination units
IEC 61140 - Protection against electric shock - Common EN 61140 -
aspects for installation and equipment
IEC 61439-1 2011 Low-voltage switchgear and controlgear EN 61439-1 2011
assemblies -
Part 1: General rules
---------------------- Page: 5 ----------------------
SIST EN 61439-2:2012
EN 61439-2:2011 - 4 -
Annex ZZ
(informative)
Coverage of Essential Requirements of EC Directive 2004/108/EC

This European Standard has been prepared under a mandate given to CENELEC by the European

Commission and the European Free Trade Association and within its scope the standard covers all

relevant essential requirements as given in Article 1 of Annex I of the EC Directive 2004/108/EC.

Compliance with this standard provides one means of conformity with the specified essential

requirements of the Directives concerned.

WARNING: Other requirements and other EC Directives may be applicable to the products falling within

the scope of this standard.
---------------------- Page: 6 ----------------------
SIST EN 61439-2:2012
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
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 7 ----------------------
SIST EN 61439-2:2012
– 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

---------------------- Page: 8 ----------------------
SIST EN 61439-2:2012
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

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 61439-2 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;
---------------------- Page: 9 ----------------------
SIST EN 61439-2:2012
– 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.
---------------------- Page: 10 ----------------------
SIST EN 61439-2:2012
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 requirements of power switchgear and controlgear

assemblies (PSC-ASSEMBLIES) 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.;
– stationary or movable ASSEMBLIES with or without enclosure;
– ASSEMBLIES intended for use in connection with the generation, transmission,

distribution and conversion of electric energy, and for the control of electric energy

consuming equipment;

– ASSEMBLIES designed for use under special service conditions, for example in ships

and in rail vehicles provided that the other relevant specific requirements are complied

with;

NOTE 2 Supplementary requirements for ASSEMBLIES in ships are covered by IEC 60092-302.

– ASSEMBLIES designed for electrical equipment of machines. Supplementary

requirements for ASSEMBLIES forming part of a machine are covered by the IEC 60204

series.

This standard applies to all ASSEMBLIES whether they are designed, manufactured and verified

on a one-off basis or fully standardised and manufactured in quantity.

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

(see 3.10.1).

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 the specific types of ASSEMBLIES covered

by other parts of IEC 61439. For ASSEMBLIES not covered by other parts this part applies.

2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:

IEC 60947-3:2008, Low-voltage switchgear and controlgear – Part 3: Switches, disconnectors,

switch-disconnectors and fuse-combination units

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

equipment
---------------------- Page: 11 ----------------------
SIST EN 61439-2:2012
– 6 – 61439-2  IEC:2011

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

rules
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
3.1 General terms
Additional definitions:
3.1.101
power switchgear and controlgear assembly
PSC-ASSEMBLY

low-voltage switchgear and controlgear assembly used to distribute and control energy for all

types of loads, intended for industrial, commercial and similar applications where operation by

ordinary persons is not intended

NOTE It is not excluded for a PSC-ASSEMBLY to be located in an area accessible to ordinary persons.

3.1.102
test situation

condition of a PSC-ASSEMBLY or part of it in which the relevant main circuits are open on its

supply side but not necessarily isolated whilst the associated auxiliary circuits are connected,

allowing operation tests of the incorporated devices
3.1.103
form of internal separation
classification of physical separation within a PSC-ASSEMBLY
3.2 Constructional units of ASSEMBLIES
Replacement of the title:
3.2 Constructional units of PSC-ASSEMBLIES
Additional definitions:
3.2.101
withdrawable part

removable part intended to be moved from the connected position to the isolated position and

to a test position, if any, whilst remaining mechanically attached to the PSC-ASSEMBLY

3.2.102
test position

position of a withdrawable part in which the relevant main circuits are open on its supply side

but not necessarily isolated and in which the auxiliary circuits are connected allowing

operation tests of the incorporated devices, the withdrawable part remaining mechanically

attached to the PSC-ASSEMBLY

NOTE The opening may also be achieved without any mechanical movement of the withdrawable part by operation

of a suitable device.
___________
To be published.
---------------------- Page: 12 ----------------------
SIST EN 61439-2:2012
61439-2  IEC:2011 – 7 –
3.2.103
isolated position

position of a withdrawable part in which an isolating distance is established in main and

auxiliary circuits on its supply side, the withdrawable part remaining mechanically attached to

the PSC-ASSEMBLY

NOTE The isolating distance may also be established without any mechanical movement of the withdrawable part

by operation of a suitable device.
3.2.104
isolating distance (of a withdrawable part)

clearance between open contacts meeting the safety requirements specified for disconnectors

[IEC 60050-441:1984, 441-17-35, modified]
Addition:
3.101 Electrical connections of functional units
3.101.1
disconnectable connection

connection which is connected or disconnected by manual operation of the connecting means

without a tool
3.101.2
withdrawable connection

connection which is connected or disconnected by bringing the functional unit into the

connected or isolated position
3.102 Gangways within PSC-ASSEMBLIES
3.102.1
operating gangway within a PSC-ASSEMBLIES

space to be used by the operator for the proper operation and supervision of the PSC-

ASSEMBLY
3.102.2
maintenance gangway within a PSC-ASSEMBLIES

space which is accessible to authorized personnel only and primarily intended for use when

servicing the installed equipment
4 Symbols and abbreviations
This clause of Part 1 is applicable.
5 Interface characteristics
This clause of Part 1 is applicable except as follows.
5.4 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 in Table 101.
---------------------- Page: 13 ----------------------
SIST EN 61439-2:2012
– 8 – 61439-2  IEC:2011
5.6 Other characteristics
Replacement of item l):

l) the type of construction – fixed, removable or withdrawable parts (see 8.5.1 and 8.5.2 of

Part 1);
Addition:
m) the form of internal separation (see 8.101);
n) the types of electrical connections of functional units (see 8.5.101).
6 Information
This clause of Part 1 is applicable except as follows.
6.1 ASSEMBLY designation marking
Replacement of the title and item d):
6.1 PSC-ASSEMBLY designation marking
d) IEC 61439-2;
7 Service conditions
This clause of Part 1 is applicable.
8 Constructional requirements
This clause of Part 1 is applicable except as follows.
8.2 Degree of protection provided by an ASSEMBLY enclosure
Replacement of the title:
8.2 Degree of protection provided by a PSC-ASSEMBLY enclosure
8.2.1 Protection against mechanical impact
Replacement of text:

Where a degree of protection provided by a PSC-ASSEMBLY enclosure against mechanical

impact is declared by the original manufacturer this shall be verified in accordance with

IEC 62262 (see 10.2.6).
Additional subclause:
8.2.101 PSC-ASSEMBLY with withdrawable parts

The degree of protection indicated for PSC-ASSEMBLIES normally applies to the connected

position (see 3.2.3) of withdrawable parts. The ASSEMBLY manufacturer shall indicate the

degree of protection obtained in the other positions and during the transfer between positions.

PSC-ASSEMBLIES with withdrawable parts may be so designed that the degree of protection

applying to the connected position is also maintained in the test and isolated positions and

during transfer from one position to another.
---------------------- Page: 14 ----------------------
SIST EN 61439-2:2012
61439-2  IEC:2011 – 9 –

If, after the removal of a withdrawable part, it is not possible to maintain the original degree of

protection e.g. by closing a door, an agreement shall be reached between the ASSEMBLY

manufacturer and user as to what measures shall be taken to ensure adequate protection.

Information provided by the ASSEMBLY manufacturer may take the place of such an agreement.

8.3.2 Clearances
Addition:

For withdrawable parts, the isolation provided in the isolated position shall at least comply

with the requirements in the relevant specification for disconnectors (see IEC 60947-3). This

applies with the equipment in new condition, taking account of the manufacturing tolerances

and anticipated changes in dimensions due to wear.

The isolating distance between the withdrawable unit main contacts and their associated fixed

contacts in the isolated position shall be capable of withstanding the test voltage for the

declared impulse withstand voltage as specified in Table 102.
8.4.3.2.2 Requirements for earth continuity providing protection against the
consequences of faults within the ASSEMBLY
Replacement of the title:
8.4.3.2.2 Requirements for earth continuity providing protection against the
consequences of faults within the PSC-ASSEMBLY
Replacement of last paragraph:

When removable or withdrawable parts are equipped with a metal supporting surface, these

surfaces shall be considered sufficient for ensuring earth continuity of protective circuits

provided that the pressure exerted on them is sufficiently high. The continuity of the protective

circuit of a withdrawable part shall remain effective from the connected position to the isolated

position inclusively.
8.4.6.1 Devices to be operated or components to be replaced by ordinary persons
This subclause of Part 1 is not applicable.
8.4.6.2 Requirements related to accessibility in service by authorized persons
Additional subclause:
8.4.6.2.101 Operating and maintenance gangways within a PSC-ASSEMBLY

Operating and maintenance gangways (see 3.102.1 and 3.102.2) within an ASSEMBLY shall

comply with the requirements for basic protection as specified in IEC 61140. The design and

construction of such gangways shall be agreed upon between ASSEMBLY manufacturer and

user.

Recesses within a PSC-ASSEMBLY of limited depth, in the order of 1 m, are not considered to

be gangways.
8.5.2 Removable parts
Replacement of the title:
8.5.2 Removable and withdrawable parts
Replacement of text:
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SIST EN 61439-2:2012
– 10 – 61439-2  IEC:2011

The removable and withdrawable parts shall be so constructed that their electrical equipment

can be safely removed and/or isolated from or connected to the main circuit whilst this circuit

is live. The removable and withdrawable parts may be provided with an insertion interlock

(see 3.2.5 of Part 1).

Clearances and creepage distances (see 8.3 of Part 1 and 8.3.2 above) shall be complied

with in the different positions as well as during transfer from one position to another.

Additional subclauses:
8.5.2.101 Withdrawable parts

Withdrawable parts shall have in addition an isolated position (see 3.2.103) and may have a

test position (see 3.2.102), or a test situation (see 3.1.102). They shall be distinctly located in

these positions. These positions shall be clearly discernible.

In PSC-ASSEMBLIES with withdrawable parts all live parts shall be protected in such a manner

that they cannot unintentionally be touched when the door, if any, is open and the

withdrawable part is withdrawn from the connected position or removed. Where an obstacle or

shutter is used they shall meet the requirements of 8.4.6.2.5 of Part 1.

For the electrical conditions associated with the different positions of withdrawable parts, see

Table 103.
8.5.2.102 Interlocking and padlocking of removable and withdrawable parts

Unless otherwise specified the removable and withdrawable parts shall be fitted with a device,

which ensures that the apparatus can only be removed/withdrawn and/or re-inserted after its

main circuit has been interrupted.

In order to prevent unauthorized operation the removable and withdrawable parts or their

associated ASSEMBLY location may be provided with a lockable means to secure them in one

or more of their positions.
Addition:
8.5.101 Description of the types of electrical connections of functional units

The types of electrical connections of functional units within PSC-ASSEMBLIES or parts of PSC-

ASSEMBLIES can be denoted by a three-letter code:

– the first letter denotes the type of electrical connection of the main incoming c

...

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