BS-EN-60079-28-2007.pdf
《BS-EN-60079-28-2007.pdf》由会员分享,可在线阅读,更多相关《BS-EN-60079-28-2007.pdf(40页珍藏版)》请在三一文库上搜索。
1、BRITISH STANDARD BS EN 60079-28:2007 Explosive atmospheres Part 28: Protection of equipment and transmission systems using optical radiation The European Standard EN 60079-28:2007 has the status of a British Standard ICS 29.260.20 ? Licensed Copy: London South Bank University, London South Bank Univ
2、ersity, Wed May 16 03:56:25 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS EN 60079-28:2007 This British Standard was published under the authority of the Standards Policy and Strategy Committee BSI 2007 ISBN 978 0 580 50687 1 National foreword This British Standard was published by BSI. It is the UK
3、 implementation of EN 60079-28:2007. It is identical with IEC 60079-28:2006. The UK participation in its preparation was entrusted to Technical Committee GEL/31, Equipment for explosive atmospheres. A list of organizations represented on this committee can be obtained on request to its secretary. Th
4、is publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. DateComments on 31 May 2007 License
5、d Copy: London South Bank University, London South Bank University, Wed May 16 03:56:25 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN 60079-28 NORME EUROPENNE EUROPISCHE NORM March 2007 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation E
6、lectrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60079-28:2007 E ICS 29.260.20 English version Explosi
7、ve atmospheres - Part 28: Protection of equipment and transmission systems using optical radiation (IEC 60079-28:2006) Atmosphres explosives - Partie 28: Protection du matriel et des systmes de transmission utilisant le rayonnement optique (CEI 60079-28:2006) Explosionsfhige Atmosphre - Teil 28: Sch
8、utz von Einrichtungen und bertragungssystemen, die mit optischer Strahlung arbeiten (IEC 60079-28:2006) This European Standard was approved by CENELEC on 2006-10-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
9、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 Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English,
10、 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 Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belg
11、ium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Licensed C
12、opy: London South Bank University, London South Bank University, Wed May 16 03:56:25 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Foreword The text of document 31/631/FDIS, future edition 1 of IEC 60079-28, prepared by IEC TC 31, Equipment for explosive atmospheres, was submitted to the IEC-CENELEC pa
13、rallel vote and was approved by CENELEC as EN 60079-28 on 2006-10-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2007-10-01 latest date by which the national standards co
14、nflicting with the EN have to be withdrawn (dow) 2009-10-01 This European Standard has been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association and covers essential requirements of EC Directive 94/9/EC. See Annex ZZ. Annexes ZA and ZZ have bee
15、n added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60079-28:2006 was approved by CENELEC as a European Standard without any modification. _ 2 EN 60079-28:2007 Licensed Copy: London South Bank University, London South Bank University, Wed May 16 03:56:25 GMT+00:00 200
16、7, Uncontrolled Copy, (c) BSI CONTENTS 1 2 3 4 4.1 4.2 5 5.1 5.2 5.3 5.4 5.5 6 6.1 6.2 6.3 6.4 7 7.1 7.2 7.3 Annex E (informative) Introduction of an alternative risk assessment method Figure 1 Figure B.1 with limit lines for intermediate areas for non-combustible Figure B.1 Minimum radiant igniting
17、 power with inert absorber target (1 064 nm=83 %, 805 nm Figure B.2 Minimum radiant igniting power with inert absorber target (1 064 nm=83 %, 805 nm=93 %) and continuous wave-radiation (PTB: 1 064 nm, HSL: 3 EN 60079-28:2007 INTRODUCTION.5 Scope.6 Normative references .7 Terms and definitions .7 Gen
18、eral requirements.10 Optical equipment .10 Risk levels.10 Types of protection.11 General.11 Requirements for inherently safe optical radiation “op is” 11 Requirements for protected optical radiation “op pr” 13 Optical radiation interlock with optical fibre breakage “op sh” 14 Suitability of types of
19、 protection.14 Type verifications and tests15 Test set-up for ignition tests 15 Reference test.16 Test mixtures 17 Tests for pulse trains and pulses between 1 ms and 1 s duration 17 Marking 17 General.17 Marking information.18 Examples of marking.18 Annex A (normative) Reference test data.19 Annex B
20、 (informative) Ignition mechanisms .20 Annex C (normative) Ignition hazard assessment.26 Annex D (informative) Typical optical fibre cable design .28 encompassing “equipment protection levels” for Ex equipment .29 Bibliography34 targets, T1 T4 atmospheres, apparatus group IIA, IIB or IIC.12 =93 %) a
21、nd continuous wave-radiation of 1 064 nm23 805 nm, 24: 803 nm) for some n-alkanes 24 Figure C.1 Ignition hazard assessment 26 Figure D.1 Example multi-fibre optical cable design for heavy duty applications.28 Figure D.2 Typical single optical fibre cable design28 Annex ZA (normative) Normative refer
22、ences to international publications with their corresponding European publications36 Annex ZZ (informative) Coverage of Essential Requirements of EC Directives37 Licensed Copy: London South Bank University, London South Bank University, Wed May 16 03:56:25 GMT+00:00 2007, Uncontrolled Copy, (c) BSI
23、Table 2 Safe optical power and irradiance for hazardous locations categorized by Table A.1 Reference values for ignition tests with a mixture of propane in air at Table B.1 AIT (auto ignition temperature), MESG (maximum experimental safe gap) and measured ignition powers of the chosen combustibles f
24、or inert absorbers as the target material (1 064 nm=83 %, 805 nm Table B.2 Comparison of measured minimum igniting optical pulse energy (Qe,pi,min) at 90 m beam diameter with auto ignition temperatures (AIT) and minimum ignition 4 EN 60079-28:2007 Table 1 Relationship between EPL and the probability
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- BS EN 60079 28 2007
链接地址:https://www.31doc.com/p-3743138.html