Low-voltage switchgear and controlgear - Part 1: General rules

IEC 60947-1:2020 applies, when required by the relevant product standard, to low-voltage switchgear and controlgear hereinafter referred to as "equipment" or “device” and intended to be connected to circuits, the rated voltage of which does not exceed 1 000 V AC or 1 500 V DC.
This document states the general rules and common safety requirements for low-voltage switchgear and controlgear, including:
- definitions;
- characteristics;
- information supplied with the equipment;
- normal service, mounting and transport conditions, decommissioning and dismantling;
- constructional and performance requirements;
- verification of characteristics and performance;
- energy efficiency aspects (see Annex V);
- environmental aspects.
This sixth edition cancels and replaces the fifth edition published in 2007, Amendment 1:2010 and Amendment 2:2014. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
– DC values testing improvement;
– update of EMC tests;
– Annex B deletion;
– update of requirements for environmental tests (Table Q.1);
– improvement of Annex R (new examples);
– deletion of digital input Type 2, and introduction of Type 3 in Annex S;
– example for materials declaration (Annex W);
– new Annex X (co-ordination between short-circuit protective devices associated in the same circuit) created.

Appareillage à basse tension – Partie 1: Règles générales

IEC 60947-1:2020 Lorsque la norme de produit correspondante l’exige, le présent document s’applique à l’appareillage basse tension ci-après désigné comme le “matériel” ou le “dispositif”, et destiné à être relié à des circuits dont la tension assignée ne dépasse pas 1 000 V en courant alternatif. ou 1 500 V en courant continu.
Le présent document a pour objet de fixer les règles générales et exigences de sécurité communes des appareillages basse tension, y compris:
– les définitions,
– les caractéristiques,
– les informations fournies avec le matériel,
– les conditions normales de service, de montage, de transport, de mise hors service et de démontage,
– les exigences relatives à la construction et au fonctionnement,
– la vérification des caractéristiques et du fonctionnement,
– les aspects liés à l’efficacité énergétique (voir Annexe V),
– les aspects environnementaux.
Cette sixième édition annule et remplace la cinquième édition parue en 2007, l'Amendement 1:2010 et l'Amendement 2:2014. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
– amélioration des essais relatifs aux valeurs en courant continu,
– mise à jour des essais de CEM,
– suppression de l’Annexe B,
– mise à jour des exigences des essais d’environnement (Tableau Q.1),
– amélioration de l’Annexe R (nouveaux exemples),
– suppression du type d’entrée numérique 2 et insertion du type 3 dans l’Annexe S,
– insertion d’un exemple de déclaration de matière dans l’Annexe W,
– création d’une nouvelle Annexe X (coordination des dispositifs de protection contre les courts-circuits associés dans un même circuit).

General Information

Status
Published
Publication Date
21-Apr-2020
Current Stage
PPUB - Publication issued
Completion Date
22-Apr-2020
Ref Project

Buy Standard

Standard
IEC 60947-1:2020 - Low-voltage switchgear and controlgear - Part 1: General rules
English and French language
577 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (sample)

IEC 60947-1
Edition 6.0 2020-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Low-voltage switchgear and controlgear –
Part 1: General rules
Appareillage à basse tension –
Partie 1: Règles générales
IEC 60947-1:2020-04(en-fr)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2020 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 l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des

questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez

les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
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 corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform Electropedia - www.electropedia.org

The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,

variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English

committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.

and withdrawn publications. Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Just Published - webstore.iec.ch/justpublished

Stay up to date on all new IEC publications. Just Published IEC Glossary - std.iec.ch/glossary

details all new publications released. Available online and 67 000 electrotechnical terminology entries in English and

once a month by email. French extracted from the Terms and Definitions clause of

IEC publications issued since 2002. Some entries have been

IEC Customer Service Centre - webstore.iec.ch/csc collected from earlier publications of IEC TC 37, 77, 86 and

If you wish to give us your feedback on this publication or CISPR.
need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
A propos de l'IEC

La Commission Electrotechnique Internationale (IEC) 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 IEC

Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la

plus récente, un corrigendum ou amendement peut avoir été publié.
Recherche de publications IEC - Electropedia - www.electropedia.org

webstore.iec.ch/advsearchform Le premier dictionnaire d'électrotechnologie en ligne au

La recherche avancée permet de trouver des publications IEC monde, avec plus de 22 000 articles terminologiques en

en utilisant différents critères (numéro de référence, texte, anglais et en français, ainsi que les termes équivalents dans

comité d’études,…). Elle donne aussi des informations sur les 16 langues additionnelles. Egalement appelé Vocabulaire

projets et les publications remplacées ou retirées. Electrotechnique International (IEV) en ligne.

IEC Just Published - webstore.iec.ch/justpublished Glossaire IEC - std.iec.ch/glossary

Restez informé sur les nouvelles publications IEC. Just 67 000 entrées terminologiques électrotechniques, en anglais

Published détaille les nouvelles publications parues. et en français, extraites des articles Termes et Définitions des

Disponible en ligne et une fois par mois par email. publications IEC parues depuis 2002. Plus certaines entrées

antérieures extraites des publications des CE 37, 77, 86 et
Service Clients - webstore.iec.ch/csc CISPR de l'IEC.
Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-nous:
sales@iec.ch.
---------------------- Page: 2 ----------------------
IEC 60947-1
Edition 6.0 2020-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Low-voltage switchgear and controlgear –
Part 1: General rules
Appareillage à basse tension –
Partie 1: Règles générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.130.20 ISBN 978-2-8322-8026-3

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 60947-1:2020 © IEC 2020
CONTENTS

FOREWORD ......................................................................................................................... 13

INTRODUCTION ................................................................................................................... 16

1 Scope ............................................................................................................................ 17

2 Normative references .................................................................................................... 17

3 Terms, definitions, symbols and reference clauses ........................................................ 21

3.1 General ................................................................................................................. 21

3.2 Alphabetical index of definitions ............................................................................ 21

3.3 General terms and definitions ............................................................................... 26

3.4 Switching devices ................................................................................................. 30

3.5 Parts of switching devices ..................................................................................... 33

3.6 Operation of switching devices .............................................................................. 39

3.7 Characteristic quantities ....................................................................................... 44

3.8 Tests .................................................................................................................... 54

3.9 Ports ..................................................................................................................... 54

3.10 Symbols and references clauses for characteristics described

in this document.................................................................................................... 54

4 Classification ................................................................................................................. 55

5 Characteristics .............................................................................................................. 55

5.1 Summary of the characteristics ............................................................................. 55

5.2 Type of equipment ................................................................................................ 56

5.3 Rated and limiting values for the main circuit ........................................................ 56

5.3.1 Rated voltages .............................................................................................. 56

5.3.2 Currents ........................................................................................................ 57

5.3.3 Rated frequency ............................................................................................ 58

5.3.4 Rated duties .................................................................................................. 58

5.3.5 Characteristics under normal load and overload conditions (see 8.2.4) .......... 60

5.3.6 Short-circuit characteristics ........................................................................... 61

5.3.7 Pole impedance of the switching device (Z) ................................................... 62

5.4 Utilization category ............................................................................................... 62

5.5 Control circuits ...................................................................................................... 62

5.5.1 Electrically or electronically controlled circuits ............................................... 62

5.5.2 Air-supply control circuits (pneumatic or electro-pneumatic) .......................... 63

5.6 Auxiliary circuits .................................................................................................... 63

5.7 Relays and releases ............................................................................................. 63

5.8 Co-ordination with short-circuit protective devices (SCPD) .................................... 63

6 Product information ....................................................................................................... 63

6.1 Nature of information ............................................................................................ 63

6.2 Marking ................................................................................................................. 64

6.3 Instructions for installation, operation and maintenance, decommissioning

and dismantling..................................................................................................... 65

6.4 Environmental information .................................................................................... 66

7 Normal service, mounting and transport conditions ........................................................ 66

7.1 Normal service conditions ..................................................................................... 66

7.1.1 Ambient air temperature ................................................................................ 66

7.1.2 Altitude .......................................................................................................... 67

7.1.3 Atmospheric conditions .................................................................................. 67

---------------------- Page: 4 ----------------------
IEC 60947-1:2020 © IEC 2020 – 3 –

7.1.4 Shock and vibration ....................................................................................... 68

7.2 Conditions during transport and storage ................................................................ 68

7.3 Mounting ............................................................................................................... 68

8 Constructional and performance requirements ............................................................... 68

8.1 Constructional requirements ................................................................................. 68

8.1.1 General ......................................................................................................... 68

8.1.2 Materials ....................................................................................................... 69

8.1.3 Current-carrying parts and their connections ................................................. 70

8.1.4 Clearances and creepage distances .............................................................. 70

8.1.5 Actuator ......................................................................................................... 70

8.1.6 Indication of the contact position ................................................................... 71

8.1.7 Additional requirements for equipment suitable for isolation ........................... 71

8.1.8 Terminals ...................................................................................................... 73

8.1.9 Additional requirements for equipment provided with a neutral pole ............... 74

8.1.10 Provisions for protective earthing ................................................................... 74

8.1.11 Dedicated enclosures for equipment .............................................................. 76

8.1.12 Degrees of protection of enclosed equipment ................................................ 76

8.1.13 Conduit pull-out, torque and bending with metallic conduits ........................... 76

8.2 Performance requirements .................................................................................... 77

8.2.1 Operating conditions ...................................................................................... 77

8.2.2 Temperature-rise ........................................................................................... 78

8.2.3 Dielectric properties ....................................................................................... 79

8.2.4 Ability to make, carry and break currents under no-load, normal load

and overload conditions ................................................................................. 82

8.2.5 Ability to make, carry and break short-circuit currents .................................... 83

8.2.6 Pole impedance ............................................................................................. 83

8.2.7 Leakage currents of equipment suitable for isolation ...................................... 84

8.3 Electromagnetic compatibility (EMC) ..................................................................... 84

8.3.1 General ......................................................................................................... 84

8.3.2 Immunity ........................................................................................................ 84

8.3.3 Emission ........................................................................................................ 85

9 Tests ............................................................................................................................. 85

9.1 Kinds of test .......................................................................................................... 85

9.1.1 General ......................................................................................................... 85

9.1.2 Type tests ...................................................................................................... 85

9.1.3 Routine tests ................................................................................................. 86

9.1.4 Sampling tests ............................................................................................... 86

9.1.5 Special tests .................................................................................................. 86

9.2 Compliance with constructional requirements ........................................................ 87

9.2.1 General ......................................................................................................... 87

9.2.2 Test of materials to abnormal heat and fire .................................................... 87

9.2.3 Equipment ..................................................................................................... 87

9.2.4 Enclosures for equipment .............................................................................. 87

9.2.5 Mechanical and electrical properties of terminals ........................................... 88

9.2.6 Verification of the effectiveness of indication of the main contact

position of equipment suitable for isolation .................................................... 90

9.2.7 Vacant ........................................................................................................... 93

9.2.8 Conduit pull-out test, torque test and bending test with metallic conduits ....... 93

9.2.9 Test of earth continuity for protective earth .................................................... 94

---------------------- Page: 5 ----------------------
– 4 – IEC 60947-1:2020 © IEC 2020

9.3 Performance ......................................................................................................... 94

9.3.1 Test sequences ............................................................................................. 94

9.3.2 General test conditions .................................................................................. 94

9.3.3 Performance under no-load, normal load and overload conditions ................. 96

9.3.4 Performance under short-circuit conditions .................................................. 109

9.4 Tests for EMC ..................................................................................................... 114

9.4.1 General ....................................................................................................... 114

9.4.2 Immunity ...................................................................................................... 114

9.4.3 Emission ...................................................................................................... 115

Annex A (informative) Harmonisation of utilization categories for low-voltage

switchgear and controlgear ................................................................................................. 146

Annex B (Vacant) ................................................................................................................ 149

Annex C (normative) Degrees of protection of enclosed equipment .................................... 150

C.1 General ............................................................................................................... 150

C.2 Object ................................................................................................................. 150

C.3 Definitions........................................................................................................... 150

C.4 Designation ......................................................................................................... 150

C.5 Degrees of protection against access to hazardous parts and against ingress

of solid foreign objects indicated by the first characteristic numeral .................... 150

C.6 Degrees of protection against ingress of water indicated by the second

characteristic numeral ......................................................................................... 150

C.7 Degrees of protection against access to hazardous parts indicated by the

additional letter ................................................................................................... 151

C.8 Supplementary letters ......................................................................................... 151

C.9 Examples of designations with IP Code ............................................................... 151

C.10 Marking ............................................................................................................... 151

C.11 General requirements for tests ............................................................................ 151

C.12 Tests for protection against access to hazardous parts indicated by the first

characteristic numeral ......................................................................................... 152

C.13 Tests for protection against ingress of solid foreign objects indicated by the

first characteristic numeral .................................................................................. 152

C.14 Tests for protection against water indicated by second characteristic

numeral .............................................................................................................. 153

C.14.1 Test means .................................................................................................. 153

C.14.2 Test conditions ............................................................................................ 153

C.14.3 Acceptance conditions ................................................................................. 153

C.15 Tests for protection against access to hazardous parts indicated by

additional letter ................................................................................................... 153

C.16 Summary of responsibilities of relevant technical committees ............................. 153

Annex D (informative) Examples of clamping units and relationship between clamping

unit and connecting device.................................................................................................. 157

D.1 Clamping unit in a connecting device .................................................................. 157

D.2 Examples of clamping units ................................................................................. 158

Annex E (informative) Description of a method for adjusting the load circuit ....................... 165

Annex F (informative) Determination of short-circuit power-factor or time-constant ............ 167

F.1 Determination of short-circuit power-factor .......................................................... 167

F.1.1 Method I – Determination from DC component ............................................. 167

F.1.2 Method II – Determination with pilot generator ............................................. 167

F.2 Determination of short-circuit time-constant (oscillographic method) ................... 168

Annex G (informative) Measurement of creepage distances and clearances ...................... 169

---------------------- Page: 6 ----------------------
IEC 60947-1:2020 © IEC 2020 – 5 –

G.1 Basic principles ................................................................................................... 169

G.2 Use of ribs .......................................................................................................... 169

Annex H (informative) Correlation between the nominal voltage of the supply system

and the rated impulse withstand voltage of equipment ........................................................ 176

(informative) Items subject to agreement between manufacturer and user ............ 178

Annex K (normative) Procedure to determine reliability data for electromechanical

devices used in functional safety applications ..................................................................... 179

K.1 General ............................................................................................................... 179

K.1.1 Overview ..................................................................................................... 179

K.1.2 Object .......................................................................................................... 179

K.1.3 General requirements .................................................................................. 179

K.2 Terms, definitions and symbols ........................................................................... 180

K.2.1 Terms and definitions .................................................................................. 180

K.2.2 Symbols ...................................................................................................... 181

K.3 Method based on durability test results ............................................................... 181

K.3.1 General method ........................................................................................... 181

K.3.2 Test requirements ........................................................................................ 181

K.3.3 Number of samples ...................................................................................... 181

K.3.4 Characterization of a failure mode ............................................................... 181

K.3.5 Weibull modelling ........................................................................................ 182

K.3.6 Useful life and upper limit of failure rate ....................................................... 184

K.3.7 Reliability data ............................................................................................. 185

K.4 Data information ................................................................................................. 185

K.5 Example.............................................................................................................. 186

K.5.1 Test results.................................................................................................. 186

K.5.2 Weibull distribution and median rank regression .......................................... 186

K.5.3 Useful life and failure rate ............................................................................ 187

Annex L (normative) Terminal marking and distinctive number ........................................... 189

L.1 General ............................................................................................................... 189

L.2 Terminal marking of impedances (alphanumerical) .............................................. 189

L.2.1 Coils ............................................................................................................ 189

L.2.2 Electromagnetic releases ............................................................................. 190

L.2.3 Interlocking electromagnets ......................................................................... 190

L.2.4 Indicating light devices ................................................................................ 191

L.3 Terminal marking of contact elements for switching devices with two

positions (numerical) ........................................................................................... 191

L.3.1 Contact elements for main circuits (main contact elements) ......................... 191

L.3.2 Contact elements for auxiliary circuit (auxiliary contact elements) ................ 191

L.4 Terminal marking of overload protection devices ................................................. 193

L.5 Distinctive number .............................................................................................. 194

L.6 Marking of terminals for external associated electronic circuit components,

contacts and complete devices ........................................................................... 194

L.6.1 Marking of terminals for external associated electronic circuit

components and contacts ............................................................................ 194

L.6.2 Marking of terminals for external complete devices ...................................... 197

Annex M (normative) Flammability test .............................................................................. 200

M.1 Hot wire ignition test (HWI) ................................................................................. 200

M.1.1 Test sample ................................................................................................. 200

M.1.2 Description of test apparatus ....................................................................... 200

---------------------- Page: 7 ----------------------
– 6 – IEC 60947-1:2020 © IEC 2020

M.1.3 Conditioning ................................................................................................ 201

M.1.4 Test procedure ............................................................................................ 201

M.2 Arc ignition test (AI) ............................................................................................ 201

M.2.1 Test sample ................................................................................................. 201

M.2.2 Description of test apparatus ....................................................................... 201

M.2.3 Conditioning ................................................................................................ 202

M.2.4 Test procedure ............................................................................................ 202

M.3 HWI and AI requirements .................................................................................... 203

Annex N (normative) Requirements and tests for equipment with protective separation ..... 204

N.1 General ............................................................................................................... 204

N.2 Terms and definitions .......................................................................................... 204

N.3 Requirements ..................................................................................................... 206

N.3.1 General ...........................................................
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.