EN IEC 60079-31:2024
(Main)Explosive atmospheres - Part 31: Equipment dust ignition protection by enclosure "t"
Explosive atmospheres - Part 31: Equipment dust ignition protection by enclosure "t"
IEC 60079-31:2022 is available as IEC 60079-31:2022 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60079-31:2022 is applicable to equipment protected by enclosure and surface temperature limitation for use in explosive dust atmospheres. It specifies requirements for design, construction and testing of Ex Equipment and Ex Components. This document supplements and modifies the general requirements of IEC 60079-0. Where a requirement of this document conflicts with a requirement of IEC 60079-0, the requirement of this document takes precedence. This document does not apply to dusts of explosives, which do not require atmospheric oxygen for combustion, or to pyrophoric substances. This document does not apply to Ex Equipment or Ex Components intended for use in underground parts of mines as well as those parts of surface installations of such mines endangered by firedamp and/or combustible dust. This document does not take account of any risk due to an emission of flammable or toxic gas from the dust. This third edition cancels and replaces the second edition published in 2013. This edition constitutes a technical revision. Main significant changes from the previous edition are: 1) Document has been restructured from edition 2 2) Fault current rating of interrupting contacts in clauses 4.3.1 and 4.4.1, major change type C1 3) Cells and batteries in clauses 4.3.5.1 and 4.4.5.1, major change type C2 4) Overload or malfunction condition for the determination of temperature class for "tb" converter fed rotating electric machines, major change type C3 5) Additional requirements for entry devices with dust ignition protection by enclosure "t", major change type C4 Information about the background of ‘Major Technical Changes’ C1 – Ex Equipment having Level of Protection "ta" shall be rated for connection to a circuit with a prospective short circuit current of not greater than 1.5 kA. For Ex Equipment having Level of Protection "tb" or "tc" which is intended for mains connection and intended to interrupt fault current above 10kA, the equipment shall have a rated maximum short circuit withstand current, be tested according to 6.1.1.1, and be marked according to Clause 7. C2 – For Ex Equipment having Level of Protection "ta" which contains a cell or battery, only a sealed cell or battery shall be used. For Ex Equipment having Level of Protection "tb" and "tc" where there are sparking contacts or hot surfaces, and which contains a cell or battery, only a sealed cell or battery shall be used. C3 – Table 2 now includes malfunction conditions for temperature class determination of Level of Protection "tb" converter-fed electric machines. C4 – Annex A added for entry devices with Type of Protection "t" including cable transit devices.
Explosionsgefährdete Bereiche - Teil 31: Geräte-Staubexplosionsschutz durch Gehäuse „t“
Atmosphères explosives - Partie 31: Protection contre l’inflammation de poussières par enveloppe "t" relative à l’appareil
IEC 60079-31:2022 est disponible sous forme de IEC 60079-31:2022 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L'IEC 60079-31:2022 est applicable à l’appareil protégé par enveloppe et limitation de la température de surface, pour une utilisation en atmosphère de poussière explosive. Elle spécifie les exigences de conception, de construction et d'essai pour l’Appareil Ex et les Composants Ex. Le présent document complète et modifie les exigences générales de l’IEC 60079-0. Lorsqu'une exigence du présent document est en contradiction avec une exigence de l’IEC 60079-0, l’exigence du présent document prévaut. Le présent document ne s’applique pas aux poussières d’explosifs dont la combustion n’exige pas l’oxygène de l’air, ni aux substances pyrotechniques. Le présent document ne s’applique ni à l’Appareil Ex ni aux Composants Ex destinés à une utilisation dans les parties souterraines des mines, ni aux parties des installations de surface des mines où il existe des risques de grisou et/ou de poussières combustibles. Le présent document ne prend en compte aucun risque résultant d’une émission de gaz inflammable ou toxique provenant de la poussière.
Eksplozivne atmosfere - 31. del: Zaščita opreme pred vžigom gorljivega prahu z ohišjem "t" (IEC 60079-31:2022 + COR1:2023)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN IEC 60079-31:2024
01-junij-2024
Eksplozivne atmosfere - 31. del: Zaščita opreme pred vžigom gorljivega prahu z
ohišjem "t" (IEC 60079-31:2022 + COR1:2023)
Explosive atmospheres - Part 31: Equipment dust ignition protection by enclosure "t"
(IEC 60079-31:2022 + COR1:2023)
Explosionsgefährdete Bereiche - Teil 31: Geräte-Staubexplosionsschutz durch Gehäuse
"t" (IEC 60079-31:2022 + COR1:2023)
Atmosphères explosives - Partie 31: Protection contre l’inflammation de poussières par
enveloppe “t” relative au matériel (IEC 60079-31:2022 + COR1:2023)
Ta slovenski standard je istoveten z: EN IEC 60079-31:2024
ICS:
29.260.20 Električni aparati za Electrical apparatus for
eksplozivna ozračja explosive atmospheres
SIST EN IEC 60079-31:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN IEC 60079-31:2024
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SIST EN IEC 60079-31:2024
EUROPEAN STANDARD EN IEC 60079-31
NORME EUROPÉENNE
EUROPÄISCHE NORM March 2024
ICS 29.260.20 Supersedes EN 60079-31:2014
English Version
Explosive atmospheres - Part 31: Equipment dust ignition
protection by enclosure "t"
(IEC 60079-31:2022 + COR1:2023)
Atmosphères explosives - Partie 31: Protection contre Explosionsgefährdete Bereiche - Teil 31: Geräte-
l'inflammation de poussières par enveloppe "t" relative à Staubexplosionsschutz durch Gehäuse "t"
l'appareil (IEC 60079-31:2022 + COR1:2023)
(IEC 60079-31:2022 + COR1:2023)
This European Standard was approved by CENELEC on 2023-12-13. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60079-31:2024 E
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SIST EN IEC 60079-31:2024
EN IEC 60079-31:2024 (E)
European foreword
The text of document 31/1595/FDIS, future edition 3 of IEC 60079-31+COR1, prepared by IEC/TC 31
"Equipment for explosive atmospheres" was submitted to the IEC-CENELEC parallel vote and
approved by CENELEC as EN IEC 60079-31:2024.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2024-09-13
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2026-12-13
document have to be withdrawn
This document supersedes EN 60079-31:2014 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60079-31:2022+COR1:2023 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 60079-14 NOTE Approved as EN 60079-14
2
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SIST EN IEC 60079-31:2024
EN IEC 60079-31:2024 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this docum
...
SLOVENSKI STANDARD
oSIST prEN 60079-31:2018
01-april-2018
(NVSOR]LYQHDWPRVIHUHGHO =DãþLWDRSUHPHSUHGYåLJRPJRUOMLYHJDSUDKX]
RKLãMHPW
Explosive atmospheres - Part 31: Equipment dust ignition protection by enclosure "t"
Explosionsgefährdete Bereiche - Teil 31: Geräte-Staubexplosionsschutz durch Gehäuse
"t"
Atmosphères explosives - Partie 31: Protection contre l’inflammation de poussières par
enveloppe “t” relative au matériel
Ta slovenski standard je istoveten z: prEN 60079-31:2018
ICS:
29.260.20 (OHNWULþQLDSDUDWL]D Electrical apparatus for
HNVSOR]LYQDR]UDþMD explosive atmospheres
oSIST prEN 60079-31:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 60079-31:2018
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oSIST prEN 60079-31:2018
31/1358/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60079-31 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2018-01-12 2018-04-06
SUPERSEDES DOCUMENTS:
31/1320/CD,31/1335A/CC
IEC TC 31 : EQUIPMENT FOR EXPLOSIVE ATMOSPHERES
SECRETARIAT: SECRETARY:
United Kingdom Mr Mick Maghar
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
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 31: Equipment dust ignition protection by enclosure "t"
NOTE FROM TC/SC OFFICERS:
Copyright © 2017 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to 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.
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oSIST prEN 60079-31:2018
IEC CDV 60079-31/Ed3 © IEC 2018 – 2 – 31/1358/CDV
1 CONTENTS
2 CONTENTS . 2
3 FOREWORD . 4
4 1 Scope . 7
5 2 Normative references . 7
6 3 Terms and definitions . 8
7 4 General . 8
8 4.1 Levels of Protection . 8
9 4.2 General requirements. 8
10 4.2.1 Equipment groups and ingress protection . 8
11 4.3 Requirements for Ex Equipment with Level of Protection “ta”. 9
12 4.3.1 Fault current . 9
13 4.3.2 Maximum surface temperature . 9
14 4.3.3 Overpressure. 9
15 4.3.4 Dust exclusion . 9
16 4.3.5 Protective devices . 9
17 4.3.6 Supplementary internal enclosure . 10
18 4.4 Requirements for Ex Equipment with Level of Protection “tb” and “tc” . 10
19 4.4.1 Fault current . 10
20 4.4.2 Maximum surface temperature .
...
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