FprEN IEC 60079-11:2022

Explosive atmospheres - Part 11: Equipment protection by intrinsic safety "i"

This part of IEC 60079 specifies the construction and testing of intrinsically safe apparatus intended for use in an explosive atmosphere, and for associated apparatus which is intended for connection to intrinsically safe circuits which enter such atmospheres. This Type of Protection is applicable to electrical equipment in which the electrical circuits themselves are incapable of causing ignition of a surrounding explosive atmosphere. This includes electrical equipment which contains circuits that are intrinsically safe only under certain conditions, for example under battery supply with mains supply removed. This standard is also applicable to electrical equipment or parts of electrical equipment located outside the explosive atmosphere or protected by another Type of Protection listed in IEC 60079-0, where the intrinsic safety of the electrical circuits in the explosive atmosphere may depend upon the design and construction of such electrical equipment or parts of such electrical equipment. The electrical circuits exposed to the explosive atmosphere are assessed for use in such an atmosphere by applying this standard. This standard applies to sensors connected to intrinsically safe circuits but does not apply to the protection of catalytic elements for Group IIC or Group IIB + H2. The requirements for intrinsically safe systems are provided in IEC 60079-25. This standard supplements and modifies the general requirements of IEC 60079-0, except as indicated in Table 1. Where a requirement of this standard conflicts with a requirement of IEC 60079-0, the requirement of this standard takes precedence. Unless otherwise stated, the requirements in this standard are applicable to both intrinsically safe apparatus and associated apparatus, and the generic term "apparatus" is used throughout the standard. As this standard applies only to electrical equipment, the term "equipment" used in the standard always means “electrical equipment”. This standard applies to apparatus for use under the atmospheric conditions of IEC 60079-0 with additional requirements for for use at lower atmospheric pressures in the range from 60 kPa (0,6 bar), up to 110 kPa (1,1 bar). [...]

Explosionsgefährdete Bereiche - Teil 11: Geräteschutz durch Eigensicherheit "i"

Atmosphères explosives - Partie 11: Protection de l'équipement par sécurité intrinsèque "i"

IEC 60079-11:2023 spécifie la construction et les essais pour le matériel électrique de sécurité intrinsèque destiné à être utilisé dans les atmosphères explosives et pour le matériel électrique associé destiné à être relié à des circuits de sécurité intrinsèque qui entrent dans de telles atmosphères. Ce mode de protection s’applique à l’appareil électrique dont les circuits électriques sont eux mêmes incapables de provoquer une inflammation dans l’atmosphère explosive environnante. Il inclut l’appareil électrique qui contient des circuits qui sont de sécurité intrinsèque uniquement dans certaines conditions, par exemple alimentés par batterie et alimentation réseau coupée. Le présent document s’applique également à l’appareil électrique ou aux parties d’appareil électrique situés hors de l’atmosphère explosive ou protégés par un autre mode de protection cité dans l’IEC 60079 0, si la sécurité intrinsèque des circuits électriques situés dans l’atmosphère explosive peut dépendre de la conception et de la construction de cet appareil électrique ou de ces parties d’appareil électrique. Les circuits électriques exposés à une atmosphère explosive sont évalués en vue de leur emploi dans de telles atmosphères en appliquant le présent document. Le présent document s’applique aux capteurs reliés à des circuits de sécurité intrinsèque, mais elle ne s’applique pas à la protection d’éléments catalytiques pour le Groupe IIC ou le Groupe IIB + H2. Le présent document ne s’applique pas aux entrées de câbles d’appareils Ex. Les exigences pour les circuits de sécurité intrinsèque sont fournies dans l’IEC 60079-25. Le présent document complète et modifie les exigences générales de l’IEC 60079-0. Si une exigence du présent document entre en conflit avec une exigence de l’IEC 60079-0, l’exigence du présent document prévaut. Sauf indication contraire, les exigences du présent document s’appliquent au matériel de sécurité intrinsèque et au matériel associé, et le terme générique "matériel" est utilisé dans toute la norme. Comme le présent document s’applique uniquement à l’appareil électrique, le terme "appareil" utilisé dans la norme signifie toujours "appareil électrique". Le présent document s’applique au matériel à utiliser dans les conditions atmosphériques de l’IEC 60079-0 avec les exigences supplémentaires pour son utilisation à des pressions atmosphériques supérieures comprises entre 60 kPa (0,6 bar) et 110 kPa (1,1 bar). Cette septième édition annule et remplace la sixième édition parue en 2011. Cette édition constitue une révision technique L'identification et la signification des changements entre la CEI 60079-11, Édition 7 (2022) et la CEI 60079-11, Édition 6 (2011 + Corrigendum 1 (2012)) peuvent être trouvées dans le tableau des modifications dans l'avant-propos de la publication

Eksplozivne atmosfere - 11. del: Zaščita opreme z lastno varnostjo "i"

General Information

• Status: Not Published
• Publication Date: 02-Mar-2023
• ICS: 29.260.20 - Electrical apparatus for explosive atmospheres
• Technical Committee: CLC/TC 31 - Electrical apparatus for explosive atmospheres - General requirements
• Drafting Committee: IEC/SC 31G - IEC_SC_31G
• Current Stage: 5060 - Voting results sent to TC, SR - Formal Approval
• Start Date: 25-Nov-2022
• Completion Date: 25-Nov-2022
• Directive: 2008/68/EC - Directve 2008/68/EC of the European Parliament and of the council of 24 September 2008 on the inland transport of the dangerous goods
• Directive: 2014/34/EU - Directive 2014/34/EU Of The European Parliament And Of The Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to equipment and protective systems intended for use in potentially explosive atmospheres (recast)
• Mandate: M/086 - Mandate to CEN for standardization in the field of transport of dangerous goods
• Mandate: M/BC/CEN/92/46 - Standardization mandate assigned to CEN/CENELEC concerning equipment and protective systems intended for use in potentially explosive atmospheres
• Mandate: M/TDG - Standards for referencing in the RID-ADR
• Ref Project: kSIST FprEN 60079-11:2022 - Explosive atmospheres - Part 11: Equipment protection by intrinsic safety "i"

Relations

• Revises: EN 60079-11:2012 - Explosive atmospheres - Part 11: Equipment protection by intrinsic safety "i"
• Effective Date: 25-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 60079-11:2021
01-januar-2021
Eksplozivne atmosfere - 11. del: Zaščita opreme z lastno varnostjo "i"
Explosive atmospheres - Part 11: Equipment protection by intrinsic safety "i"
Explosionsgefährdete Bereiche - Teil 11: Geräteschutz durch Eigensicherheit "i"
Atmosphères explosives - Partie 11: Protection de l'équipement par sécurité intrinsèque
"i"
Ta slovenski standard je istoveten z: prEN 60079-11:2020
ICS:
29.260.20 Električni aparati za Electrical apparatus for
eksplozivna ozračja explosive atmospheres
oSIST prEN 60079-11:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 60079-11:2021
oSIST prEN 60079-11:2021
31G/327/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60079-11 ED7
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2020-11-06 2021-01-29
SUPERSEDES DOCUMENTS:
31G/291/CD, 31G/297A/CC
IEC SC 31G : INTRINSICALLY-SAFE APPARATUS
SECRETARIAT: SECRETARY:
United Kingdom Mr Nicholas Ludlam
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
TC 18,SC 31J
Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.

TITLE:
Explosive atmospheres - Part 11: Equipment protection by intrinsic safety "i"

PROPOSED STABILITY DATE: 2026
NOTE FROM TC/SC OFFICERS:
The attached CDV includes significant changes from Edition 6 including a restructure and new technical
elements. It is requested that NCs hold any new items until completion of Edition 7.
download this electronic file, to make a copy and to print out the content for the sole purpose of preparing National
Committee positions. You may not copy or "mirror" the file or printed version of the document, or any part of it,
for any other purpose without permission in writing from IEC.

oSIST prEN 60079-11:2021
The list of 'significance of differences' in the Foreword will be circulated as a separate INF document.
Due to the nature of changes between this CDV and IEC 60079-11 Ed 6 a redline comparison is not
being circulated.
oSIST prEN 60079-11:2021
31G/327/CDV – 2 – IEC CDV 60079-11  IEC:2020
2 CONTENTS
3 FOREWORD . 10
4 1 Scope . 13
5 2 Normative references . 24
6 3 Terms, definitions and abbreviated terms . 25
7 3.1 Terms and definitions. 25
8 3.2 Abbreviated terms . 29
9 4 Grouping, classification and Levels of Protection of apparatus . 30
10 5 Levels of Protection and ignition compliance requirements . 30
11 5.1 General . 30
12 5.2 Conditions for assessment . 31
13 5.2.1 General . 31
14 5.2.2 Level of Protection "ia" . 31
15 5.2.3 Level of Protection "ib" . 32
16 5.2.4 Level of Protection “ic” . 32
17 5.2.5 Non-shock hazard equipment or systems . 32
18 5.3 Spark ignition compliance . 33
19 5.3.1 General . 33
20 5.3.2 Levels of Protection “ia” and “ib” . 34
21 5.3.3 Level of Protection “ic” . 34
22 5.3.4 Application of safety factors . 34
23 5.3.5 Circuits without controlled semiconductor limitation . 35
24 5.3.6 Circuits with controlled semiconductor limitation . 35
25 5.4 Thermal ignition compliance. 36
26 5.4.1 General . 36
27 5.4.2 Temperature of small components for Group I and Group II . 37
28 5.4.3 Wiring within intrinsically safe apparatus for Group I and Group II . 37
29 5.4.4 PCB tracks for Group I and Group II . 38
30 5.4.5 Intrinsically safe apparatus and component temperature for dusts . 40
31 5.5 Simple apparatus . 40
32 6 Apparatus construction . 41
33 6.1 General . 41
34 6.2 Enclosures . 41
35 6.2.1 General . 41
36 6.2.2 Apparatus complying with Table 7 . 42
37 6.2.3 Apparatus complying with Table 8 or Table 9 . 42
38 6.2.4 Enclosures for Group IIIC intrinsically safe apparatus . 42
39 6.3 Connection facilities for external circuits . 43
40 6.3.1 Terminals . 43
41 6.3.2 Plugs and sockets . 45
42 6.3.3 Permanently connected cable . 45
43 6.3.4 Connections and accessories for intrinsically safe apparatus when
44 located in the non-hazardous area . 46
45 6.4 Internal connections and connectors . 47
46 6.4.1 General . 47
47 6.4.2 Infallible connections . 47
48 6.4.3 Connectors for internal connections, plug-in cards and components . 49
49 6.4.4 Earth conductors and connections . 49

oSIST prEN 60079-11:2021
IEC CDV 60079-11  IEC:2020 -3- 31G/327/CDV

50 6.5 Separation of conductive parts . 49
51 6.5.1 Separations on which intrinsic safety depends . 49
52 6.5.2 Separation distances according to Table 7 . 50
53 6.5.3 Reduced separation distances . 50
54 6.5.4 Failure of separations . 51
55 6.5.5 Voltage between conductive parts . 57
56 6.5.6 Types of separation . 57
57 6.5.7 Composite separations . 64
58 6.5.8 Printed circuit board assemblies . 65
59 6.5.9 Separation by metal parts . 66
60 6.5.10 Separation by non-metallic insulating partitions . 67
61 6.5.11 Insulation of internal wiring . 67
62 6.6 Encapsulation . 67
63 6.6.1 General . 67
64 6.6.2 Encapsulation used for the exclusion of explosive atmospheres . 69
65 6.6.3 Mechanical protection to avoid access to parts . 71
66 6.6.4 Encapsulation used for protection of a fuse. . 71
67 6.6.5 Encapsulation used to provide separation . 71
68 6.6.6 Encapsulation used to enhance the rating of protective components . 72
69 6.6.7 Free space within the encapsulation . 72
70 6.7 Specification of coating, encapsulation and moulding materials . 73
71 6.7.1 General . 73
72 6.7.2 Coating materials . 73
73 6.7.3 Materials used for encapsulation . 74
74 6.7.4 Plastic materials used for moulding . 74
75 6.8 Protection against polarity reversal . 74
76 6.9 Dielectric strength requirement . 74
77 7 Characteristics and failure of components and assemblies . 75
78 7.1 Rating of components on which intrinsic safety depends . 75
79 7.2 Failure of components . 75
80 7.3 Manufacturing variation . 75
81 7.4 Resistors . 76
82 7.4.1 General . 76
83 7.4.2 Resistors on which intrinsic safety depends . 76
84 7.5 Capacitors . 77
85 7.5.1 General . 77
86 7.5.2 Capacitors on which intrinsic safety depends . 77
87 7.5.3 Blocking capacitors . 78
88 7.5.4 Infallible filter capacitors . 78
89 7.6 Inductors and windings . 78
90 7.6.1 General . 78
91 7.6.2 Inductors on which intrinsic safety depends . 79
92 7.6.3 Infallibly insulated inductors . 79
93 7.6.4 Damping windings . 80
94 7.6.5 Common mode choke coils (EMI suppression filters) . 80
95 7.7 Semiconductors . 80
96 7.7.1 General . 80
97 7.7.2 Semiconductors on which intrinsic safety depends. 81

oSIST prEN 60079-11:2021
31G/327/CDV – 4 – IEC CDV 60079-11  IEC:2020
98 7.7.3 Transient effects on semiconductors on which intrinsic safety depends . 81
99 7.7.4 Semiconductors in shunt voltage limiters . 82
100 7.7.5 Shunt assembly on which intrinsic safety depends . 82
101 7.7.6 Infallible assemblies on which intrin
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