IEC 60079-10-1:2015
(Main)Explosive atmospheres - Part 10-1: Classification of areas - Explosive gas atmospheres
Explosive atmospheres - Part 10-1: Classification of areas - Explosive gas atmospheres
IEC 60079-10-1:2015 is concerned with the classification of areas where flammable gas or vapour hazards may arise and may then be used as a basis to support the proper selection and installation of equipment for use in hazardous areas. It is intended to be applied where there may be an ignition hazard due to the presence of flammable gas or vapour, mixed with air, but it does not apply to:
- mines susceptible to firedamp;
- the processing and manufacture of explosives;
- catastrophic failures or rare malfunctions which are beyond the concept of abnormality dealt with in this standard (see 3.7.3 and 3.7.4);
- rooms used for medical purposes;
- commercial and industrial applications where only low pressure fuel gas is used for appliances e.g. for cooking, water heating and similar uses, where the installation is compliant with relevant gas codes;
- domestic premises;
- where a hazard may arise due to the presence of combustible dusts or combustible flyings but the principles may be used in assessment of a hybrid mixture (refer also IEC 60079-10-2). This second edition of IEC 60079-10-1 cancels and replaces the first edition, published in 2008, and constitutes a technical revision. The significant technical changes with respect to the previous edition are identified in the Foreward of the document. Keywords: ignition hazards, flammable gas or vapour, risk of explosions
Atmosphères explosives - Partie 10-1: Classement des emplacements - Atmosphères explosives gazeuses
L'IEC 60079-10-1:2015 concerne le classement des emplacements dans lesquels des dangers dus à des gaz ou vapeurs inflammables peuvent apparaître, et ainsi constitue une base pour le choix et l'installation corrects du matériel utilisé dans de tels emplacements. Elle est destinée à être appliquée là où il peut exister un danger d'inflammation du fait de la présence de gaz ou vapeurs inflammables, en mélange avec l'air, mais elle ne s'applique pas:
- aux mines grisouteuses;
- au traitement et à la fabrication des explosifs;
- aux défaillances catastrophiques ou rares dysfonctionnements, qui dépassent le concept d'anormalité traité dans la présente norme (voir 3.7.3 et 3.7.4);
- aux locaux utilisés à des fins médicales;
- aux applications commerciales et industrielles dans lesquelles seul du gaz combustible basse pression est utilisé, par exemple, pour cuisiner, chauffer l'eau, etc., l'installation satisfaisant aux codes de gaz correspondants;
- aux locaux à usage domestique;
- lorsqu'un danger peut apparaître compte tenu de la présence de poussières combustibles ou de particules combustibles en suspension dans l'air, mais les principes définis peuvent toutefois être appliqués dans l'évaluation d'un mélange hybride (se reporter également à l'IEC 60079-10-2). Cette deuxième édition de l'IEC 60079-10-1 annule et remplace la première édition parue en 2008. Cette édition constitue une révision technique. Les modifications techniques importantes par rapport à l'édition précédente sont identifiés dans l'avant-propos du document. Mots clés: danger d'inflammation, gaz ou vapeurs inflammables, risque d'explosions
Vodilo za električne inštalacije – 53. del: Izbira in namestitev električne opreme – Stikalne in krmilne naprave
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Standards Content (Sample)
IEC 60079-10-1 ®
Edition 2.0 2015-09
INTERNATIONAL
STANDARD
colour
inside
Explosive atmospheres –
Part 10-1: Classification of areas – Explosive gas atmospheres
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
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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
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variety of criteria (reference number, text, technical English and French extracted from the Terms and Definitions
committee,…). It also gives information on projects, replaced clause of IEC publications issued since 2002. Some entries
and withdrawn publications. have been collected from earlier publications of IEC TC 37,
77, 86 and CISPR.
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IEC 60079-10-1 ®
Edition 2.0 2015-09
INTERNATIONAL
STANDARD
colour
inside
Explosive atmospheres –
Part 10-1: Classification of areas – Explosive gas atmospheres
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.260.20 ISBN 978-2-8322-2867-8
– 2 – IEC 60079-10-1:2015 © IEC 2015
CONTENTS
FOREWORD . 6
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 11
4 General . 15
4.1 Safety principles . 15
4.2 Area classification objectives . 16
4.3 Explosion risk assessment . 16
4.4 Competence of Personnel . 17
5 Area classification methodology . 17
5.1 General . 17
5.2 Classification by sources of release method . 18
5.3 Use of industry codes and national standards . 18
5.4 Simplified methods . 18
5.5 Combination of methods . 19
6 Release of flammable substance . 19
6.1 General . 19
6.2 Sources of release . 19
6.3 Forms of release . 20
6.3.1 General . 20
6.3.2 Gaseous release . 21
6.3.3 Liquefied under pressure . 21
6.3.4 Liquefied by refrigeration . 22
6.3.5 Aerosols . 22
6.3.6 Vapours . 22
6.3.7 Liquid releases . 22
6.4 Ventilation (or air movement) and dilution . 23
6.5 Main types of ventilation . 23
6.5.1 General . 23
6.5.2 Natural ventilation. 23
6.5.3 Artificial ventilation . 24
6.5.4 Degree of dilution . 25
7 Type of zone . 26
7.1 General . 26
7.2 Influence of grade of the source of release . 26
7.3 Influence of dilution . 27
7.4 Influence of availability of ventilation . 27
8 Extent of zone . 27
9 Documentation . 28
9.1 General . 28
9.2 Drawings, data sheets and tables . 28
Annex A (informative) Suggested presentation of hazardous areas . 30
A.1 Hazardous area zones – Preferred symbols . 30
A.2 Hazardous area suggested shapes . 33
Annex B (informative) Estimation of sources of release. 35
B.1 Symbols . 35
B.2 Examples of grade of release . 35
B.2.1 General . 35
B.2.2 Sources giving a continuous grade of release . 35
B.2.3 Sources giving a primary grade of release . 36
B.2.4 Sources giving a secondary grade of release . 36
B.3 Assessment of grades of release . 36
B.4 Summation of releases . 37
B.5 Hole size and source radius . 38
B.6 Forms of release . 40
B.7 Release rate . 41
B.7.1 General . 41
B.7.2 Estimation of Release Rate . 41
B.7.3 Release rate of evaporative pools . 44
B.8 Release from openings in buildings . 46
B.8.1 General . 46
B.8.2 Openings as possible sources of release . 46
B.8.3 Openings classification . 46
Annex C (informative) Ventilation guidance . 48
C.1 Symbols . 48
C.2 General . 49
C.3 Assessment of ventilation and dilution and its influence on hazardous area . 49
C.3.1 General . 49
C.3.2 Effectiveness of ventilation . 50
C.3.3 Criteria for dilution . 50
C.3.4 Assessment of ventilation velocity . 51
C.3.5 Assessment of the degree of dilution . 52
C.3.6 Dilution in a room . 53
C.3.7 Criteria for availability of ventilation . 55
C.4 Examples of ventilation arrangements and assessments . 56
C.4.1 Introduction . 56
C.4.2 Jet release in a large building . 56
C.4.3 Jet release in a small naturally ventilated building . 57
C.4.4 Jet release in a small artificially ventilated building . 57
C.4.5 Release with low velocity . 58
C.4.6 Fugitive emissions . 59
C.4.7 Local ventilation-extraction . 59
C.5 Natural Ventilation in buildings . 60
C.5.1 General . 60
C.5.2 Wind induced ventilation . 60
C.5.3 Buoyancy induced ventilation. 61
C.5.4 Combination of the natural ventilation induced by wind and buoyancy . 63
Annex D (informative) Estimation of hazardous zones. 65
D.1 General . 65
D.2 Estimating types of the zones . 65
D.3 Estimating the extent of the hazardous zone . 65
Annex E (informative) Examples of hazardous area classification .
...
IEC 60079-10-1 ®
Edition 2.0 2015-09
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Explosive atmospheres –
Part 10-1: Classification of areas – Explosive gas atmospheres
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
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3, rue de Varembé info@iec.ch
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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 corrigenda or an amendment might have been published.
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committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and
CISPR.
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IEC 60079-10-1 ®
Edition 2.0 2015-09
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Explosive atmospheres –
Part 10-1: Classification of areas – Explosive gas atmospheres
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.260.20 ISBN 978-2-8322-2887-6
– 2 – IEC 60079-10-1:2015 RLV © IEC 2015
CONTENTS
FOREWORD . 6
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 11
3 Terms and definitions . 11
4 General . 16
4.1 Safety principles . 16
4.2 Area classification objectives . 17
4.3 Explosion risk assessment . 17
4.4 Competence of Personnel . 18
5 Area classification procedure methodology . 18
5.1 General . 18
5.2 Classification by sources of release method . 19
5.3 Use of industry codes and national standards . 19
5.4 Simplified methods . 19
5.4.1 Release rate of gas or vapour .
5.4.2 Lower explosive limit (LEL) .
5.4.3 Ventilation .
5.4.4 Relative density of the gas or vapour when it is released .
5.4.5 Other parameters to be considered .
5.4.6 Illustrative examples .
5.5 Combination of methods . 20
6 Release of flammable substance . 20
6.1 General . 20
6.2 Sources of release . 20
6.3 Forms of release . 22
6.3.1 General . 22
6.3.2 Gaseous release . 22
6.3.3 Liquefied under pressure . 23
6.3.4 Liquefied by refrigeration . 23
6.3.5 Aerosols . 23
6.3.6 Vapours . 23
6.3.7 Liquid releases . 24
6.4 Ventilation (or air movement) and dilution . 24
6.5 Main types of ventilation . 25
6.5.1 General . 25
6.5.2 Natural ventilation. 25
6.5.3 Artificial ventilation . 26
6.5.4 Degree of dilution . 27
7 Type of zone . 28
7.1 General . 28
7.2 Influence of grade of the source of release . 28
7.3 Influence of dilution . 28
7.4 Influence of availability of ventilation . 28
8 Extent of zone . 29
9 Documentation . 32
9.1 General . 32
9.2 Drawings, data sheets and tables . 33
Annex A (informative) Suggested presentation of hazardous areas . 34
A.1 Hazardous area zones – Preferred symbols . 34
A.2 Hazardous area suggested shapes . 39
Annex B (informative) Examples of sources of release and release rate Estimation of
sources of release . 42
B.1 Symbols . 42
B.2 Process plant Examples of grade of release . 42
B.2.1 General . 42
B.2.2 Sources giving a continuous grade of release . 43
B.2.3 Sources giving a primary grade of release . 43
B.2.4 Sources giving a secondary grade of release . 43
B.3 Assessment of grades of release . 43
B.4 Summation of releases . 44
B.5 Hole size and source radius . 45
B.6 Forms of release . 46
B.7 Release rate . 48
B.7.1 General . 48
B.7.2 Estimation of Release Rate . 49
B.7.3 Release rate of evaporative pools . 53
B.8 Examples of estimating release rate .
B.8 Release from openings in buildings . 57
B.8.1 General . 57
B.8.2 Openings as possible sources of release . 57
B.8.3 Openings classification . 57
Annex B (informative) Ventilation .
Annex C (informative) Ventilation guidance . 75
C.1 Symbols . 75
C.2 General . 76
C.3 Assessment of ventilation and dilution and its influence on hazardous area . 76
C.3.1 General . 76
C.3.2 Effectiveness of ventilation . 77
C.3.3 Criteria for dilution . 77
C.3.4 Assessment of ventilation velocity . 78
C.3.5 Assessment of the degree of dilution . 79
C.3.6 Dilution in a room . 80
C.3.7 Criteria for availability of ventilation . 82
C.4 Examples of ventilation arrangements and assessments . 83
C.4.1 Introduction . 83
C.4.2 Jet release in a large building . 83
C.4.3 Jet release in a small naturally ventilated building . 84
C.4.4 Jet release in a small artificially ventilated building . 84
C.4.5 Release with low velocity . 85
C.4.6 Fugitive emissions . 86
C.4.7 Local ventilation-extraction . 86
C.5 Natural Ventilation in buildings .
...
IEC 60079-10-1 ®
Edition 2.0 2015-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Explosive atmospheres –
Part 10-1: Classification of areas – Explosive gas atmospheres
Atmosphères explosives –
Partie 10-1: Classement des emplacements – Atmosphères explosives gazeuses
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
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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 15 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.
IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and
CISPR.
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IEC 60079-10-1 ®
Edition 2.0 2015-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Explosive atmospheres –
Part 10-1: Classification of areas – Explosive gas atmospheres
Atmosphères explosives –
Partie 10-1: Classement des emplacements – Atmosphères explosives gazeuses
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.260.20 ISBN 978-2-8322-3112-8
– 2 – IEC 60079-10-1:2015 © IEC 2015
CONTENTS
FOREWORD . 6
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 11
4 General . 15
4.1 Safety principles . 15
4.2 Area classification objectives . 16
4.3 Explosion risk assessment . 16
4.4 Competence of personnel . 17
5 Area classification methodology . 17
5.1 General . 17
5.2 Classification by sources of release method . 18
5.3 Use of industry codes and national standards . 18
5.4 Simplified methods . 18
5.5 Combination of methods . 19
6 Release of flammable substance . 19
6.1 General . 19
6.2 Sources of release . 19
6.3 Forms of release . 20
6.3.1 General . 20
6.3.2 Gaseous release . 21
6.3.3 Liquefied under pressure . 21
6.3.4 Liquefied by refrigeration . 22
6.3.5 Aerosols . 22
6.3.6 Vapours . 22
6.3.7 Liquid releases . 22
6.4 Ventilation (or air movement) and dilution . 23
6.5 Main types of ventilation . 23
6.5.1 General . 23
6.5.2 Natural ventilation. 23
6.5.3 Artificial ventilation . 24
6.5.4 Degree of dilution . 25
7 Type of zone . 26
7.1 General . 26
7.2 Influence of grade of the source of release . 26
7.3 Influence of dilution . 27
7.4 Influence of availability of ventilation . 27
8 Extent of zone . 27
9 Documentation . 28
9.1 General . 28
9.2 Drawings, data sheets and tables . 28
Annex A (informative) Suggested presentation of hazardous areas . 30
A.1 Hazardous area zones – Preferred symbols . 30
A.2 Hazardous area suggested shapes . 33
Annex B (informative) Estimation of sources of release. 35
B.1 Symbols . 35
B.2 Examples of grade of release . 35
B.2.1 General . 35
B.2.2 Sources giving a continuous grade of release . 35
B.2.3 Sources giving a primary grade of release . 36
B.2.4 Sources giving a secondary grade of release . 36
B.3 Assessment of grades of release . 36
B.4 Summation of releases . 37
B.5 Hole size and source radius . 38
B.6 Forms of release . 40
B.7 Release rate . 41
B.7.1 General . 41
B.7.2 Estimation of Release Rate . 41
B.7.3 Release rate of evaporative pools . 44
B.8 Release from openings in buildings . 46
B.8.1 General . 46
B.8.2 Openings as possible sources of release . 46
B.8.3 Openings classification . 46
Annex C (informative) Ventilation guidance . 48
C.1 Symbols . 48
C.2 General .
...
SLOVENSKI STANDARD
01-februar-2000
9RGLOR]DHOHNWULþQHLQãWDODFLMH±GHO ,]ELUDLQQDPHVWLWHYHOHNWULþQHRSUHPH±
6WLNDOQHLQNUPLOQHQDSUDYH
Electrical installation guide - Part 53: Selection and erection of electrical equipment -
Switchgear and controlgear
Guide pour les installations électriques - Partie 53: Choix et mise en oeuvre des
matériels électriques - Appareillage
Ta slovenski standard je istoveten z: IEC/TS 61200-53
ICS:
29.130.01 Stikalne in krmilne naprave Switchgear and controlgear
na splošno in general
91.140.50 Sistemi za oskrbo z elektriko Electricity supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
RAPPORT CEI
TECHNIQUE IEC
1200-53
TECHNICAL
Première édition
REPORT
First edition
1994-10
Guide pour les installations électriques —
Partie 53:
Choix et mise en oeuvre des matériels électriques -
Appareillage
Electrical installation guide —
Part 53:
Selection and erection of electrical equipment —
Switchgear and controlgear
Numéro de référence
IEC
Reference number
•
CEI/IEC 1200-53: 1994
Numéros des publications Numbering
CEI As from 1 January 1997 all IEC publications are
Depuis le 1er janvier 1997, les publications de la
sont numérotées à partir de 60000. issued with a designation in the 60000 series.
Consolidated publications
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including amendments are available. For example,
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Par exemple, les numéros d'édition 1.0, 1.1 et 1.2 edition numbers 1.0, 1.1 and 1.2 refer, respectively, to
indiquent respectivement la publication de base, la the base publication, the base publication incor-
porating amendment 1 and the base publication
publication de base incorporant l'amendement 1, et
incorporating amendments 1 and 2.
la publication de base incorporant les amendements 1
et 2.
Validité publication Validity of this publication
de la présente
Le contenu technique des publications de la CEI est The technical content of IEC publications is kept under
constamment revu par la CEI afin qu'il reflète l'état constant review by the IEC, thus ensuring that the
content reflects current technology.
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Terminologie, symboles graphiques Terminology, graphical and letter
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For general terminology, readers are referred to
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se reportera à la CEI 60050: Vocabulaire Electro- IEC 60050: International Electrotechnical Vocabulary
(VEI). (IEV).
technique International
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et les signes d'usage général approuvés par la CEI, le
Symboles littéraux à referred to publications IEC 60027: Letter symbols to
lecteur consultera la CEI 60027:
Symboles be used in electrical technology, IEC 60417: Graphical
utiliser en électrotechnique, la CEI 60417:
graphiques utilisables sur le matériel. Index, relevé et symbols for use on equipment. Index, survey and
compilation des feuilles individuelles, et la CEI 60617: compilation of the single sheets and IEC 60617:
Graphical symbols for diagrams.
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RAPPORT CEI
TECHNIQUE - TYPE 2 I EC
1200-53
TECHNICAL
Première
édition
REPORT - TYPE 2
First edition
1994-10
électriques —
Guide pour les installations
Partie 53:
Choix et mise en oeuvre des matériels électriques —
Appareillage
Electrical installation guide —
Part 53:
Selection and erection of electrical equipment —
Switchgear and controlgear
réservés — Copyright - all rights reserved
© CEI 1994 Droits de reproduction
No part of this publication may be reproduced or utilized in
Aucune partie de cette publication ne peut être reproduite ni
any form or by any means, electronic or mechanical,
utilisée sous quelque forme que ce soit et par aucun pro-
including photocopying and microfilm, without permission
cédé, électronique ou mécanique, y compris la photocopie et
in writing from the publisher.
les microfilms, sans l'accord écrit de l'éditeur.
Genève, Suisse
Bureau Central de la Commission Electrotechnique Internationale 3, rue de Varembé
CODE PRIX
Commission Electrotechnique Internationale
International Electrotechnical Commission J
PRICE CODE
IEC McNgiyuapoQHae 3nelcrpoTe%HH4ecna i HoMHCCHa
voir catalogue en vigueur
Pour prix, ^
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For price, see current catalogue
IEC Publication 1200-53
Publication 1200-53 de la CEI
(First edition - 1994)
(Première édition - 1994)
installations électriques – Electrical installation guide –
Guide pour les
Partie 53:
Part 53:
Choix et mise en oeuvre des matériels électriques –
Selection and erection of electrical equipment –
Appareillage
Switchgear and controlgear
C O R R I G E N D U M 1
Page 5
Page 4
In the second column of the table, indicating
Dans la deuxième colonne du tableau,
the report on voting, add the following:
indiquant le rapport de vote, ajouter ce qui
suit:
64(SEC)677B
64(SEC)677B
Page 7
Page 6
Under the title, before subclause 53. 1, add
Sous le titre, avant le paragraphe 53. 1,
the following introductory lines:
ajouter les lignes d’introduction suivantes:
In the informative annexes A and B,
Dans les annexes informatives A et B, des
information is given, respectively, on the
informations sont données, respectivement
choice of the utilisation categories of low-
sur le choix des catégories d’emploi des
voltage switchgear and controlgear and on
appareillages à basse tension et sur les
the methods of installation of electrical
méthodes d’ins-tallation des accessoires
accessories for household and similar
électriques pour usages domestiques et
analogues. applications.
Page 17
Page 16
After figure 4, add the following annexes A
Après la figure 4, ajouter les annexes A et B
and B:
suivantes:
(see overleaf)
(voir au verso)
− 2 −
Annexe A
(informative)
Exemples de catégories d’emploi pour l’appareillage à
basse tension
(voir annexe B de la CEI 947-1)
Norme CEI
Nature du
Catégorie Applications caractéristiques de matériel
courant
correspondante
(voir article 1)
Alternatif AC-1 Charges non inductives ou faiblement inductives, fours à résistances
AC-2 Moteurs à bagues: démarrage, coupure
Moteurs à cage: démarrage, coupure des moteurs lancés
AC-3
AC-4 Moteurs à cage: démarrage, inversion de marche 1 ), marche par
2)
à-coups
Commande de lampes à décharge
AC-5a
AC-5b Commande de lampes à incandescence 947-1
AC-6a Commande de transformateurs
AC-6b Commande de batteries de condensateurs
AC-7a Charges faiblement inductives pour appareils domestiques et appli-
cations similaires
AC-7b Moteurs pour applications domestiques
AC-8a Commande de moteurs de compresseurs hermétiques de réfrigéra-
tion avec réarmement manuel des déclencheurs de surcharge
AC-8b Commande de moteurs de compresseurs hermétiques de réfrigéra-
tion avec réarmement automatique des déclencheurs de surcharge
AC-12 Commande de charges ohmiques et de charges statiques isolées par
photo-coupleur
AC-13 Commande de charges statiques isolées par transformateur 947-5
AC-14 Commande de faibles charges électromagnétiques d’électro-aimants
Commande de charges électromagnétiques d’électro-aimants
AC-15
AC-20 Fermeture et ouverture à vide
AC-21 Charges ohmiques, y compris surcharges modérées
AC-22
Charges mixtes ohmiques et inductives, y compris surcharges
modérées 947-3
AC-23 Charges constituées par des moteurs ou autres charges fortement
inductives
Alternatif A
Protection des circuits sans courant assigné de courte durée
et admissible
947-2
continu B Protection des circuits avec courant assigné de courte durée
admissible
Charges non inductives ou faiblement inductives, fours à résistances
Continu DC-1
DC-3 Moteurs shunts, démarrage, inversion de marche 1 ), marche par
2)
947-4
à-coups
, coupure dynamique de moteurs
DC-5 Moteurs série, démarrage, inversion de marche 1 ), marche par
à-coups 2), coupure dynamique de moteurs
DC-6 Commande de lampes à incandescence
DC-12 Commande de charges ohmiques et de charges statiques isolées par
photo-coupleurs
DC-13 Commande d’électro-aimants à courant continu 947-5
DC-14 Commande d’électro-aimants à courant continu ayant des résis-
tances d’économie
DC-20 Fermeture et ouverture à vide
DC-21 Charges résistives, y compris surcharges modérées
DC-22 Charges mixtes résistives et inductives, y compris surcharges 947-3
modérées (par exemple: moteurs shunt)
DC-23 Charges fortement inductives (par exemple: moteurs série)
1)
Par inversion de marche, on entend l’arrêt ou l’inversion rapide du sens de rotation du moteur en permutant
des connexions d’alimentation du moteur pendant que celui-ci tourne.
2)
Par marche par à-coups, on entend une commande caractérisée par une ou plusieurs fermetures brèves et
fréquentes du circuit d’un moteur, afin d’obtenir de petits déplacements de l’organe entraîné.
− 3 −
Annex A
(informative)
Examples of utilization categories for low-voltage
switchgear and controlgear
(see annex B of IEC 947-1)
Relevant IEC
Nature of
Category Typical applications product
current
standard
(see clause 1)
Non-inductive or slightly inductive loads, resistance furnaces
AC AC-1
Slip-ring motors: starting, switching off
AC-2
Squirrel-cage motors: starting, switching off motors during running
AC-3
1 2)
AC-4 Squirrel-cage motors: starting, plugging ), inching
AC-5a Switching of electic discharge lamp control
AC-5b Switching of incandescent lamps 947-1
AC-6a Switching of transformers
AC-6b Switching of capacitor banks
AC-7a Slightly inductive loads in household appliances and similar
applications
AC-7b Motor-loads for household applications
AC-8a Hermetic refrigerant compressor motor control with manual resetting
of overload releases
AC-8b Hermetic refrigerant compressor motor control with automatic
resetting of overload releases
AC-12 Control of resistive loads and solid state loads with isolation by
optocouplers
AC-13 Control of solid state loads with transformer isolation 947-5
AC-14 Control of small electromagnetic loads
AC-15 Control of a.c. electromagnetic loads
AC-20 Connecting and disconnecting under no-load conditions
AC-21 Switching of resistive loads, including moderate overloads
AC-22 Switching of mixed resistive and inductive loads, including moderate
overloads 947-3
AC-23 Switching of motor loads or other highly inductive loads
AC A Protection of circuits, with no rated short-time withstand current
947-2
and DC B Protection of circuits, with a rated short-time withstand current
DC DC-1 Non-inductive or slightly inductive loads, resistance furnaces
DC-3 1 ), inching 2), dynamic breaking of
Shunt-motors, starting, plugging
947-4
motors
DC-5 Series-motors, starting, plugging 1 ), inching 2), dynamic breaking of
motors
DC-6 Switching of incandescent lamps
DC-12 Control of resistive loads and solid state loads with isolation by
optocouplers
DC-13 Control of d.c. electromagnets 947-5
DC-14 Control of d.c. electromagnetic loads having economy resistors in
circuit
DC-20 Connecting and disconnecting under non-load conditions
DC-21 Switching of resistive loads, including moderate overloads
DC-22 Switching of mixed resistive and inductive loads, including moderate 947-3
overloads (e.g. shunt motors)
DC-23 Switching of highly inductive loads (e.g. series motors)
1)
By plugging is understood stopping or reversing the motor rapidly by reversing motor primary connections
while the motor is running.
2)
By inching (jogging) is understood energizing a motor once or repeatedly for short periods to obtain small
movements of the driven mechanism.
− 4 −
Annexe B
(informative)
Méthodes d’installation des électriques
appareillages
(voir CEI 669-1 et 884-1)
Selon leur méthode d’installation, les appareillages électriques sont classifiés (voir paragraphe
7.1.7 de la CEI 669-1, sur les interrupteurs et le paragraphe 7.2.3 de la CEI 884-1, sur les
prises de courant pour les installations domestiques et analogues, comme suit:
− appareillages de conception A, si le capot ou une plaque de couverture ou des parties de
ces derniers peuvent être retirés sans déplacement des conducteurs;
− appareillages de conception B, si le capot ou une plaque de couverture ou des parties de
ces derniers ne peuvent être retirés sans déplacement des conducteurs;
NOTE − Si un appareil fixe possède un socle (partie principale) ne pouvant être séparé du couvercle ou de
la plaque de couverture, et qui nécessite une plaque supplémentaire pouvant être retirée pour des travaux
de décoration murale sans déplacement des conducteurs, alors cet appareillage est considéré comme étant
de conception A, à condition que la plaque supplémentaire satisfasse aux prescriptions spécifiées pour les
couvercles et les plaques de couverture.
Les appareillages de type A et B sont considérés comme sûrs s’ils sont correctement installés
et utilisés.
− 5
...
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