Low-voltage switchgear and controlgear - Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units (IEC 60947-3:2008)

This International Standard is applicable to replaceable lamps (filament lamps and discharge lamps) to be used in headlamps, fog-lamps and signalling lamps for road vehicles. It is especially applicable to those lamps which are the subject of legislation. In particular, it includes the lamps contained in Regulations1) No.37 and No.99 of the Geneva Agreement of 20 March 1958 of the United Nations Economic Commission for Europe (ECE). However, the standard may be used for other lamps falling under the scope of this standard. The standard specifies the technical requirements with methods.

Niederspannungsschaltgeräte - Teil 3: Lastschalter, Trennschalter, Lasttrennschalter und Schalter-Sicherungs-Einheiten (IEC 60947-3:2008)

Appareillage à basse tension - Partie 3: Interrupteurs, sectionneurs, interrupteurs-sectionneurs et combinés-fusibles (CEI 60947-3:2008)

La CEI 60947-3:2008 s'applique à l'appareillage suivant: interrupteurs, sectionneurs, interrupteurs-sectionneurs et combinés-fusibles, destinés à être insérés dans des circuits de distribution et des circuits de moteurs dont la tension assignée est inférieure ou égale à 1 000 V en courant alternatif ou à 1 500 V en courant continu. La présente partie n'est pas applicable au matériel faisant partie du domaine d'application de la CEI 60947-2, de la CEI 60947-4-1 et de la CEI 60947-5-1; cependant, quand les interrupteurs et les combinés-fusibles faisant partie du domaine d'application de la présente partie sont normalement utilisés pour assurer le démarrage, l'accélération et/ou l'arrêt d'un moteur, ils doivent aussi répondre aux exigences supplémentaires figurant à l'Annexe A. Les exigences pour les interrupteurs tripolaires à commande unipolaire se trouvent à l'Annexe C. Les interrupteurs auxiliaires montés sur du matériel faisant partie du domaine d'application de la présente partie doivent satisfaire aux exigences de la CEI 60947-5-1. La présente partie ne contient pas les exigences supplémentaires nécessaires au matériel électrique pour atmosphères explosives. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: - alignement avec la cinquième édition de la CEI 60947-1; - une manoeuvre de commutation sans courant est admise entre une manoeuvre d'établissement et de coupure (Tableau 3); - un nombre accru de manoeuvres pour AC-23 est admis avec l'accord du fabricant (Tableau 3); - la procédure d'essai simplifiée est corrigée, le point f) a été ajouté en 8.3.2.1.3; - l'essai d'échauffement doit être réalisé au courant assigné d'emploi /e au lieu du courant thermique conventionnel sous enveloppe /the (8.3.3.1).

Nizkonapetostne stikalne in krmilne naprave - 3. del: Stikala, ločilniki, ločilna stikala in stikalni aparati z varovalkami (IEC 60947-3:2008)

Ta del standarda IEC 60947 se uporablja za stikala, ločilnike, ločilna stikala in stikalne aparate z varovalkami, ki so namenjeni uporabi v razdelilnih tokokrogih in motorskih tokokrogih, pri čemer nazivna napetost ne presega 1000 V izmenične napetosti ali 1500 V enosmerne napetosti. Proizvajalec mora določiti vrsto, mejne vrednosti in značilnosti vseh vključenih varovalk v skladu z ustreznim standardom. Ta del se ne uporablja za opremo, ki spada v področje uporabe standardov IEC 60947-2, IEC 60947-4-1 in IEC 60947-5-1; vendar morajo biti stikala in stikalni aparati z varovalkami, ki bodo spadali v področje uporabe tega dela in se običajno uporabljajo za zagon, pospeševanje in/ali ustavljanje posameznega motorja, prav tako skladni z dodatnimi zahtevami iz dodatka A. Zahteve za tripolna stikala z enim samim priključnim polom so zajete v dodatku C. Pomožna stikala, pritrjena na opremo, ki spada v področje uporabe tega dela, morajo biti skladna z zahtevami standarda IEC 60947-5-1. Ta del ne zajema dodatnih zahtev, potrebnih za električne naprave za eksplozivne plinske atmosfere.

General Information

Status
Published
Publication Date
15-Jul-2009
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
10-Jun-2009
Due Date
15-Aug-2009
Completion Date
16-Jul-2009

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SLOVENSKI STANDARD
SIST EN 60947-3:2009
01-september-2009
1DGRPHãþD
SIST EN 60947-3:2000
SIST EN 60947-3:2000/A1:2002
SIST EN 60947-3:2000/A2:2006

1L]NRQDSHWRVWQHVWLNDOQHLQNUPLOQHQDSUDYHGHO6WLNDODORþLOQLNLORþLOQD

VWLNDODLQVWLNDOQLDSDUDWL]YDURYDONDPL ,(&

Low-voltage switchgear and controlgear - Part 3: Switches, disconnectors, switch-

disconnectors and fuse-combination units (IEC 60947-3:2008)

Niederspannungsschaltgeräte - Teil 3: Lastschalter, Trennschalter, Lasttrennschalter und

Schalter-Sicherungs-Einheiten (IEC 60947-3:2008)

Appareillage à basse tension - Partie 3: Interrupteurs, sectionneurs, interrupteurs-

sectionneurs et combinés-fusibles (CEI 60947-3:2008)
Ta slovenski standard je istoveten z: EN 60947-3:2009
ICS:
29.130.20 Nizkonapetostne stikalne in Low voltage switchgear and
krmilne naprave controlgear
SIST EN 60947-3:2009 en

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

---------------------- Page: 1 ----------------------
SIST EN 60947-3:2009
---------------------- Page: 2 ----------------------
SIST EN 60947-3:2009
EUROPEAN STANDARD
EN 60947-3
NORME EUROPÉENNE
June 2009
EUROPÄISCHE NORM
ICS 29.120.40; 29.130.20 Supersedes EN 60947-3:1999 + A1:2001 + A2:2005
English version
Low-voltage switchgear and controlgear -
Part 3: Switches, disconnectors, switch-disconnectors
and fuse-combination units
(IEC 60947-3:2008)
Appareillage à basse tension - Niederspannungsschaltgeräte -
Partie 3: Interrupteurs, sectionneurs, Teil 3: Lastschalter, Trennschalter,
interrupteurs-sectionneurs Lasttrennschalter
et combinés-fusibles und Schalter-Sicherungs-Einheiten
(CEI 60947-3:2008) (IEC 60947-3:2008)

This European Standard was approved by CENELEC on 2009-05-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, 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
Central Secretariat: Avenue Marnix 17, B - 1000 Brussels

© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60947-3:2009 E
---------------------- Page: 3 ----------------------
SIST EN 60947-3:2009
EN 60947-3:2009 - 2 -
Foreword

The text of document 17B/1601/FDIS, future edition 3 of IEC 60947-3, prepared by SC 17B, Low-voltage

switchgear and controlgear, of IEC TC 17, Switchgear and controlgear, was submitted to the

IEC-CENELEC parallel vote and was approved by CENELEC as EN 60947-3 on 2009-05-01.

This European Standard supersedes EN 60947-3:1999 + A1:2001 + A2:2005.

EN 60947-3:2009 includes the following significant technical changes with respect to EN 60947-3:1999:

– alignment with EN 60947-1:2007;

– a switching operation without current allowed between making and breaking operation (Table 3);

– increased number of operations for AC-23 allowed with agreement of the manufacturer (Table 3);

– simplified test procedure amended, f) added to 8.3.2.1.3;

– temperature rise test shall be made at the rated operational current Ie instead of the conventional

enclosed thermal current Ithe (8.3.3.1).

This part is to be used in conjunction with EN 60947-1.The numbering of the subclauses is sometimes not

continuous because it is based on EN 60947-1.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2010-02-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2012-05-01

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

Commission and the European Free Trade Association and covers essential requirements of

EC Directive EMC (2004/108/EC). See Annex ZZ.
Annexes ZA and ZZ have been added by CENELEC.
__________
Endorsement notice

The text of the International Standard IEC 60947-3:2008 was approved by CENELEC as a European

Standard without any modification.

In the official version, for Bibliography, the following note has to be added for the standard indicated:

IEC 60447 NOTE Harmonized as EN 60447:2004 (not modified).
__________
---------------------- Page: 4 ----------------------
SIST EN 60947-3:2009
- 3 - EN 60947-3:2009
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.
Publication Year Title EN/HD Year
IEC 60050-441 1984 International Electrotechnical Vocabulary - -
A1 2000 (IEV) -
Chapter 441: Switchgear, controlgear and
fuses
IEC 60269 (mod) Series Low-voltage fuses EN/HD 60269 Series
IEC 60410 1973 Sampling plans and procedures - -
for inspection by attributes
IEC 60417 Data- Graphical symbols for use on equipment - -
base
IEC 60947-1 2007 Low-voltage switchgear and controlgear - EN 60947-1 2007
Part 1: General rules
IEC 60947-2 2006 Low-voltage switchgear and controlgear - EN 60947-2 2006
Part 2: Circuit-breakers
IEC 60947-4-1 2000 Low-voltage switchgear and controlgear - EN 60947-4-1 2001
A1 2002 Part 4-1: Contactors and motor-starters - A1 2002
A2 2005 Electromechanical contactors and motor- A2 2005
starters
IEC 60947-5-1 2003 Low-voltage switchgear and controlgear - EN 60947-5-1 2004
Part 5-1: Control circuit devices and switching + corr. July 2005
elements - Electromechanical control circuit
devices
IEC 61000-4-2 1995 Electromagnetic compatibility (EMC) - EN 61000-4-2 1995
A1 1998 Part 4-2: Testing and measurement A1 1998
A2 2000 techniques - Electrostatic discharge A2 2001
immunity test
IEC 61000-4-3 2006 Electromagnetic compatibility (EMC) - EN 61000-4-3 2006
A1 2007 Part 4-3: Testing and measurement A1 2008
techniques - Radiated, radio-frequency, + IS1 2009
electromagnetic field immunity test
IEC 61000-4-4 2004 Electromagnetic compatibility (EMC) - EN 61000-4-4 2004
Part 4-4: Testing and measurement
techniques - Electrical fast transient/burst
immunity test
IEC 61000-4-5 2005 Electromagnetic compatibility (EMC) - EN 61000-4-5 2006
Part 4-5: Testing and measurement
techniques - Surge immunity test

EN 61000-4-2 is superseded by EN 61000-4-2:2009, which is based on IEC 61000-4-2:2008.

---------------------- Page: 5 ----------------------
SIST EN 60947-3:2009
EN 60947-3:2009 - 4 -
Publication Year Title EN/HD Year
IEC 61000-4-6 2003 Electromagnetic compatibility (EMC) -
+ A1 2004 Part 4-6: Testing and measurement
+ A2 2006 techniques - Immunity to conducted EN 61000-4-6 2007
disturbances, induced by radio-frequency + corr. August 2007
fields + IS1 2009
CISPR 11 (mod) 2003 Industrial scientific and medical (ISM)
+ A1 (mod) 2004 radio-frequency equipment - EN 55011 2007
A2 2006 Electromagnetic disturbance characteristics - A2 2007
Limits and methods of measurement
CISPR 22 (mod) 2005 Information technology equipment - Radio EN 55022 2006
A1 2005 disturbance characteristics - Limits and A1 2007
A2 (mod) 2006 methods of measurement A2 200X

EN 61000-4-6 is superseded by EN 61000-4-6:2009, which is based on IEC 61000-4-6:2008.

At draft stage.
---------------------- Page: 6 ----------------------
SIST EN 60947-3:2009
- 5 - EN 60947-3:2009
Annex ZZ
(informative)
Coverage of Essential Requirements of EC Directives

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 Directive concerned.

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

the scope of this standard.
__________
---------------------- Page: 7 ----------------------
SIST EN 60947-3:2009
---------------------- Page: 8 ----------------------
SIST EN 60947-3:2009
IEC 60947-3
Edition 3.0 2008-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Low-voltage switchgear and controlgear –
Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination
units
Appareillage à basse tension –
Partie 3: Interrupteurs, sectionneurs, interrupteurs-sectionneurs et combinés-
fusibles
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX
ICS 29.120.40; 29.130.20 ISBN 2-8318-9965-6
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 9 ----------------------
SIST EN 60947-3:2009
– 2 – 60947-3 © IEC:2008
CONTENTS

FOREWORD...........................................................................................................................4

1 General ............................................................................................................................6

1.1 Scope and object.....................................................................................................6

1.2 Normative references ..............................................................................................7

2 Terms and definitions .......................................................................................................8

3 Classification ..................................................................................................................11

3.1 According to the utilization category.......................................................................11

3.2 According to the method of operation of manually operated equipment...................11

3.3 According to suitability for isolation ........................................................................11

3.4 According to the degree of protection provided.......................................................11

4 Characteristics................................................................................................................12

4.1 Summary of characteristics....................................................................................12

4.2 Type of equipment .................................................................................................12

4.3 Rated and limiting values for the main circuit .........................................................12

4.4 Utilization category ................................................................................................14

4.5 Control circuits ......................................................................................................15

4.6 Auxiliary circuits ....................................................................................................15

4.7 Relays and releases ..............................................................................................15

5 Product information.........................................................................................................15

5.1 Nature of information .............................................................................................15

5.2 Marking .................................................................................................................16

5.3 Instructions for installation, operation and maintenance..........................................17

6 Normal service, mounting and transport conditions..........................................................17

7 Constructional and performance requirements ................................................................17

7.1 Constructional requirements ..................................................................................17

7.2 Performance requirements.....................................................................................19

7.3 Electromagnetic compatibility.................................................................................22

8 Tests ..............................................................................................................................24

8.1 Kind of tests ..........................................................................................................24

8.2 Type tests for constructional requirements .............................................................25

8.3 Performance..........................................................................................................29

8.4 Electromagnetic compatibility tests ........................................................................45

8.5 Special tests..........................................................................................................46

Annex A (normative) Equipment for direct switching of a single motor...................................47

Annex B (informative) Items subject to agreement between manufacturer and user...............53

Annex C (normative) Single pole operated three pole switches .............................................54

Bibliography ..........................................................................................................................57

Figure 1 – Actuator applied force F........................................................................................28

Figure C.1 – Typical arrangements........................................................................................55

Table 1 – Summary of equipment definitions .........................................................................11

Table 2 – Utilization categories..............................................................................................15

Table 3 – Verification of rated making and breaking capacities (see 8.3.3.3) –

Conditions for making and breaking corresponding to the various utilization categories..........20

---------------------- Page: 10 ----------------------
SIST EN 60947-3:2009
60947-3 © IEC:2008 – 3 –
Table 4 – Verification of operational performance – Number of operating cycles

corresponding to the rated operational current.......................................................................21

Table 5 – Test circuit parameters for Table 4.........................................................................21

Table 6 − Immunity tests .......................................................................................................23

Table 7 − Emission limits.......................................................................................................23

Table 8 – Actuator test forces................................................................................................27

Table 9 – List of type tests applicable to a given equipment ...................................................29

Table 10 – Overall scheme of test sequences........................................................................30

Table 11 – Test sequence I: general performance characteristics ..........................................34

Table 12 – Temperature-rise limits for terminals and accessible parts....................................37

Table 13 – Test sequence II: operational performance capability ...........................................37

Table 14 – Test sequence III: short-circuit performance capability .........................................39

Table 15 – Test sequence IV: conditional short-circuit current................................................43

Table 16 – Test sequence V: overload performance capability ...............................................45

Table A.1 – Utilization categories ..........................................................................................48

Table A.2 – Rated making and breaking capacity conditions corresponding to several

utilization categories .............................................................................................................48

Table A.3 – Relationship between current broken I and off-time for the verification of

the rated making and breaking capacities ..............................................................................49

Table A.4 – Operational performance – Conditions for making and breaking

corresponding to several utilization categories.......................................................................49

Table A.5 – Verification of the number of on-load operating cycles – Conditions for

making and breaking corresponding to several utilization categories......................................52

---------------------- Page: 11 ----------------------
SIST EN 60947-3:2009
– 4 – 60947-3 © IEC:2008
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 3: Switches, disconnectors, switch-disconnectors
and fuse-combination units
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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any

equipment declared to be in conformity with an IEC Publication.

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 60947-3 has been prepared by subcommittee 17B: Low-voltage

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

This third edition cancels and replaces the second edition published in 1999, Amendment 1

(2001) and Amendment 2 (2005). This edition constitutes a technical revision.

The document 17B/1601/FDIS, circulated to the National Committees as amendment 3, led to

the publication of the new edition.

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

edition:
– alignment with the fifth edition of IEC 60947-1;

– a switching operation without current allowed between making and breaking operation

(Table 3);

– increased number of operations for AC-23 allowed with agreement of the manufacturer

(Table 3);
---------------------- Page: 12 ----------------------
SIST EN 60947-3:2009
60947-3 © IEC:2008 – 5 –
– simplified test procedure amended, f) added to 8.3.2.1.3;

– temperature rise test shall be made at the rated operational current I instead of the

conventional enclosed thermal current I (8.3.3.1).
the

The text of this standard is based on the first edition, its amendment 1, amendment 2 and the

following documents:
FDIS Report on voting
17B/1601/FDIS 17B/1608/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.

A list of all parts of the IEC 60947 series can be found, under the general title Low-voltage

switchgear and controlgear, on the IEC website.

This part is to be used in conjunction with IEC 60947-1.The numbering of the subclauses is

sometimes not continuous because it is based on IEC 60947-1.

The committee has decided that the contents of this publication will remain unchanged until the

maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition; or
• amended.
---------------------- Page: 13 ----------------------
SIST EN 60947-3:2009
– 6 – 60947-3 © IEC:2008
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 3: Switches, disconnectors, switch-disconnectors
and fuse-combination units
1 General

The provisions of the general rules dealt with in IEC 60947-1 are applicable to this part, where

specifically called for. Clauses and subclauses, tables, figures and appendices of the general

rules thus applicable are identified by reference IEC 60947-1, e.g., 4.3.4.1 of IEC 60947-1,

Table 4 of IEC 60947-1, or Annex A of IEC 60947-1.
1.1 Scope and object

This part of IEC 60947 applies to switches, disconnectors, switch-disconnectors and fuse-

combination units to be used in distribution circuits and motor circuits of which the rated

voltage does not exceed 1 000 V a.c. or 1 500 V d.c.

The manufacturer shall specify the type, ratings and characteristics according to the relevant

standard of any incorporated fuses.

This part does not apply to equipment coming within the scope of IEC 60947-2, IEC 60947-4-1 and

IEC 60947-5-1; however, when switches and fuse-combination units coming into the scope of

this part are normally used to start, accelerate and/or stop an individual motor they shall also

comply with the additional requirements given in Annex A.

The requirements for single pole operated three pole switches are included in Annex C.

Auxiliary switches fitted to equipment within the scope of this part shall comply with the

requirements of IEC 60947-5-1.

This part does not include the additional requirements necessary for electrical apparatus for

explosive gas atmospheres.

NOTE 1 Depending on its design, a switch (or disconnector) can be referred to as "a rotary switch (disconnector)",

"cam-operated switch (disconnector)", "knife-switch (disconnector)", etc.

NOTE 2 In this part, the word "switch" also applies to the apparatus referred to in French as "commutateurs",

intended to modify the connections between several circuits and inter alia to substitute a part of a circuit for

another.

NOTE 3 In general, throughout this part switches, disconnectors, switch-disconnectors and fuse-combination units

will be referred to as "equipment".
The object of this part is to state
a) the characteristics of the equipment;
b) the conditions with which the equipment shall comply with reference to
1) operation and behaviour in normal service;

2) operation and behaviour in case of specified abnormal conditions, e.g. short circuit;

3) dielectric properties;

c) the tests for confirming that these conditions have been met and the methods to be

adopted for these tests;
---------------------- Page: 14 ----------------------
SIST EN 60947-3:2009
60947-3 © IEC:2008 – 7 –

d) the information to be marked on the equipment or made available by the manufacturer, e.g.

in the catalogue.
1.2 Normative references

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.

IEC 60050-441:1984, International Electrotechnical Vocabulary (IEV) – Chapter 441:

Switchgear, controlgear and fuses
Amendment 1 (2000)
IEC 60269 (all parts), Low-voltage fuses
IEC 60410:1973, Sampling plans and procedures for inspection by attributes
IEC 60417-DB:2000 , Graphical symbols for use on equipment
IEC 60947-1:2007, Low-voltage switchgear and controlgear – Part 1: General rules

IEC 60947-2:2006, Low-voltage switchgear and controlgear – Part 2: Circuit-breakers

IEC 60947-4-1:2000, Low-voltage switchgear and controlgear – Part 4-1: Contactors and

motor-starters – Electromechanical contactors and motor-starters
Amendment 1 (2002)
Amendment 2 (2005)

IEC 60947-5-1:2003, Low-voltage switchgear and controlgear – Part 5-1: Control circuit

devices and switching elements – Electromechanical control circuit devices
IEC 61000-4-2:1995, Electromagnetic compatibility (EMC) – Part 4-2: Testing and
measurement techniques – Electrostatic discharge immunity test
Amendment 1 (1998)
Amendment 2 (20È00)
IEC 61000-4-3:2006, Electromagnetic compatibility (EMC) – Part 4-3: Testing and

measurement techniques – Radiated, radio-frequency, electromagnetic field immunity test

Amendment 1 (2007)
IEC 61000-4-4:2004, Electromagnetic compatibility (EMC) – Part 4-4: Testing and
measurement techniques – Electrical fast transient/burst immunity test
IEC 61000-4-5:2005, Electromagnetic compatibility (EMC) – Part 4-5: Testing and
measurement techniques – Surge immunity test
IEC 61000-4-6:2003, Electromagnetic compatibility (EMC) – Part 4-6: Testing and

measurement techniques – Immunity to conducted disturbances, induced by radio-frequency

fields
Amendment 1 (2004)
Amendment 2 (2006)

CISPR 11:2003, Industrial, scientific and medical (ISM) radio-frequency equipment –

Electromagnetic disturbance characteristics – Limits and methods of measurement
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“DB” refers to the IEC on-line database.
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SIST EN 60947-3:2009
– 8 – 60947-3 © IEC:2008
Amendment 1 (2004)
Amendment 2 (2006)

CISPR 22:2005, Information technology equipment – Radio disturbance characteristics – Limits

and methods of measurement
Amendment 1 (2005)
Amendment 2 (2006)
2 Terms and definitions

For the purposes of this part of IEC 60947, the terms and definitions given in IEC 60050-441,

IEC 60947-1 and the following apply.
Reference

Dependent manual operation (of a mechanical switching device)............................... 2.13

Disconnector............................................................................................................. 2.2

Disconnector-fuse..................................................................................................... 2.7

Fuse-combination unit ..................
...

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