SIST EN 60079-31:2024

Explosive atmospheres - Part 31: Equipment dust ignition protection by enclosure "t" (IEC 60079-31:2022 + COR1:2023)

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" (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)

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

• Status: Not Published
• Public Enquiry End Date: 05-Apr-2018
• ICS: 29.260.20 - Electrical apparatus for explosive atmospheres
• Technical Committee: EXP - Electrical apparatus for explosive atmospheres
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 05-Mar-2024
• Due Date: 10-May-2024
• 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)
• Ref Project: EN IEC 60079-31:2024 - Explosive atmospheres - Part 31: Equipment dust ignition protection by enclosure "t"

Relations

• Revised: SIST EN 60079-31:2014 - Explosive atmospheres - Part 31: Equipment dust ignition protection by enclosure "t" (IEC 60079-31:2013)
• Effective Date: 16-May-2017

Standards Content (Sample)

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 .
...