Explosive atmospheres - Part 25: Intrinsically safe electrical systems

IEC 60079-25:2020 contains the specific requirements for design, construction and assessment of intrinsically safe systems, Type of Protection “i”, intended for use, as a whole or in part, in locations in which the use of Group I, II or III Ex Equipment is required. This document supplements and modifies the general requirements of IEC 60079-0 and the intrinsic safety standard IEC 60079-11. Where a requirement of this standard conflicts with a requirement of IEC 60079-0 or IEC 60079-11, the requirement of this standard takes precedence. The installation requirements of Group II or Group III systems designed in accordance with this standard are specified in IEC 60079-14. This third edition cancels and replaces the second edition published in 2010 and constitutes a technical revision.

Explosionsgefährdete Bereiche - Teil 25: Eigensichere Systeme

Atmosphères explosives - Partie 25: Systèmes électriques de sécurité intrinsèque

IEC 60079-25:2020 contient les exigences spécifiques de conception, de construction et d’évaluation des systèmes de sécurité intrinsèque, de mode de protection "i", destinés à être utilisés, en tout ou en partie, dans des atmosphères qui exigent l’emploi de matériel Ex du Groupe I, II ou III. Le présent document complète et modifie les exigences générales de l’IEC 60079-0 et de la norme de sécurité intrinsèque IEC 60079-11. En cas de contradiction entre une exigence de la présente norme et une exigence de l’IEC 60079-0 ou de l’IEC 60079-11, l’exigence de la présente norme prévaut. Les exigences d’installation pour les systèmes du Groupe II ou du Groupe III conçus conformément à la présente norme sont spécifiées dans l’IEC 60079-14. Cette troisième édition annule et remplace la deuxième édition parue en 2010 et constitue une révision technique.

Eksplozivne atmosfere - 25. del: Lastnovarni električni sistemi (IEC 60079-25:2020 + COR1:2020)

Ta del standarda IEC 60079 vsebuje posebne zahteve za načrtovanje, konstrukcijo in preskušanje lastnovarnih sistemov, tipa zaščite »i«, namenjenih za uporabo v celoti ali delno na lokacijah, kjer se zahteva uporaba opreme, razvrščene v skupine I, II ali III Ex. OPOMBA 1: Ta standard je namenjen načrtovalcem sistemov, ki so lahko npr. proizvajalec, strokovni svetovalec ali član osebja končnega uporabnika. Ta dokument dopolnjuje in spreminja splošne zahteve standarda IEC 60079-0 in standard lastnovarnosti IEC 60079-11. Kadar je zahteva iz tega standarda v nasprotju z zahtevo iz standarda IEC 60079-0 ali IEC 60079-11, ima prednost zahteva iz tega standarda. Zahteve za namestitev sistemov iz skupine II ali skupine III, zasnovanih v skladu s tem standardom, so določene v standardu IEC 60079-14. OPOMBA 2: Zahteve za namestitev sistemov iz skupine I trenutno niso navedene v standardu IEC 60079-14. Zahteve za namestitev za sisteme iz skupine I so v obravnavi.

General Information

Status
Published
Publication Date
08-Sep-2022
Current Stage
6060 - Document made available - Publishing
Start Date
09-Sep-2022
Completion Date
09-Sep-2022

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Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN IEC 60079-25:2022
01-november-2022
Nadomešča:
SIST EN 60079-25:2010
SIST EN 60079-25:2010/AC:2014
Eksplozivne atmosfere - 25. del: Lastnovarni električni sistemi (IEC 60079-25:2020
+ COR1:2020)
Explosive atmospheres - Part 25: Intrinsically safe electrical systems (IEC 60079-
25:2020 + COR1:2020)
Explosionsfähige Atmosphäre - Teil 25: Eigensichere Systeme (IEC 60079-25:2020 +
COR1:2020)
Atmosphères explosives - Partie 25: Systèmes électriques de sécurité intrinsèque (IEC
60079-25:2020 + COR1:2020)
Ta slovenski standard je istoveten z: EN IEC 60079-25:2022
ICS:
29.260.20 Električni aparati za Electrical apparatus for
eksplozivna ozračja explosive atmospheres
SIST EN IEC 60079-25:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 60079-25:2022

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SIST EN IEC 60079-25:2022


EUROPEAN STANDARD EN IEC 60079-25

NORME EUROPÉENNE

EUROPÄISCHE NORM September 2022
ICS 29.260.20 Supersedes EN 60079-25:2010; EN 60079-
25:2010/AC:2013
English Version
Explosive atmospheres - Part 25: Intrinsically safe electrical
systems
(IEC 60079-25:2020 + COR1:2020)
Atmosphères explosives - Partie 25: Systèmes électriques Explosionsfähige Atmosphäre - Teil 25: Eigensichere
de sécurité intrinsèque Systeme
(IEC 60079-25:2020 + COR1:2020) (IEC 60079-25:2020 + COR1:2020)
This European Standard was approved by CENELEC on 2022-05-25. 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,
Turkey 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
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 60079-25:2022 E

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SIST EN IEC 60079-25:2022
EN IEC 60079-25:2022 (E)
European foreword
The text of document 31G/318/FDIS, future edition 3 of IEC 60079-25, prepared by SC 31G
"Intrinsically-safe apparatus" of IEC/TC 31 "Equipment for explosive atmospheres" was submitted to
the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 60079-25:2022.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2023-03-09
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2025-09-09
document have to be withdrawn
This document supersedes EN 60079-25:2010 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.
This document has been prepared under a Standardization Request given to CENELEC by the
European Commission and the European Free Trade Association, and supports essential
requirements of EU Directive(s) / Regulation(s).
For the relationship with EU Directive(s) / Regulation(s), see informative Annex ZZ, which is an
integral part of this document.
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 60079-25:2020 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 60529 NOTE Harmonized as EN 60529
2

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SIST EN IEC 60079-25:2022
EN IEC 60079-2
...

SLOVENSKI STANDARD
oSIST prEN IEC 60079-25:2019
01-maj-2019
(NVSOR]LYQHDWPRVIHUHGHO/DVWQRYDUQLHOHNWULþQLVLVWHPL
Explosive atmospheres - Part 25: Intrinsically safe electrical systems
Explosionsfähige Atmosphäre - Teil 25: Eigensichere Systeme
Atmosphères explosives - Partie 25: Systèmes électriques de sécurité intrinsèque
Ta slovenski standard je istoveten z: prEN IEC 60079-25:2019
ICS:
29.260.20 (OHNWULþQLDSDUDWL]D Electrical apparatus for
HNVSOR]LYQDR]UDþMD explosive atmospheres
oSIST prEN IEC 60079-25:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN IEC 60079-25:2019

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oSIST prEN IEC 60079-25:2019
31G/294/CDV

COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60079-25 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2019-03-22 2019-06-14
SUPERSEDES DOCUMENTS:
31G/279/CD,31G/284A/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
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 25: Intrinsically safe electrical systems

PROPOSED STABILITY DATE: 2025

NOTE FROM TC/SC OFFICERS:

Copyright © 2019 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 IEC 60079-25:2019
IEC CDV 60079-25  IEC:2019 – 2 – 31G/294/CDV
1 CONTENTS
2
3 FOREWORD . 4
4 1 Scope . 8
5 2 Normative references . 8
6 3 Terms and definitions . 8
7 4 Descriptive system document . 9
8 5 Grouping and temperature classification . 10
9 6 Levels of Protection . 10
10 6.1 General . 10
11 6.2 Level of Protection “ia” . 10
12 6.3 Level of Protection “ib” . 10
13 6.4 Level of Protection “ic” . 10
14 7 Non-intrinsically safe circuits . 11
15 8 Interconnecting wiring / cables used in an intrinsically safe system . 11
16 8.1 General . 11
17 8.2 Cables containing a single intrinsically safe circuit . 11
18 8.3 Cables containing more than one intrinsically safe circuit . 11
19 9 Requirements of single and multi-circuit cables . 11
20 9.1 General .
...

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