1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 60079-28 Explosive Atmospheres Part 28: Protection of Equipment and Transmission Systems Using Optical Radiation STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODU
2、CTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Explosive Atmospheres Part 28: Protection of Equipment and Transmission Systems Using Optical Radiation, UL 60079-28 S
3、econd Edition, Dated September 15, 2017 Summary of Topics This revision of ANSI/UL 60079-28 is being issued to include a National Difference to the Introduction and replace Class 1 with Class I in the rst example of the third paragraph of Clause 7DV. Please note that the national difference document
4、 incorporates all of the US national differences for UL 60079-28 including the revisions noted below. UL 60079-28 is based on IEC 60079-28, Edition 2.0 published May, 2015. Editorial Revision to include a National Difference to the Introduction and replace Class 1 with Class I in the rst example of
5、the third paragraph of Clause 7DV. The requirements are substantially in accordance with Proposal(s) on this subject dated December 23, 2016 and July 28, 2017. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. THIS
6、SECOND EDITION OF UL 60079-28 REPLACES THE FIRST EDITION OF ISA-60079-28 DATED 2012. AS OF SEPTEMBER 15, 2022, ISA-60079-28:2012 WILL BE WITHDRAWN. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, m
7、echanical photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard as is without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or tness for any purpose. In no event will UL be liable f
8、or any special, incidental, consequential, indirect or similar damages, including loss of prots, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such
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10、ge, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. DECEMBER 8, 2017 UL 60079-28 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRI
11、BUTION WITHOUT PERMISSION FROM UL DECEMBER 8, 2017 UL 60079-28 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 15, 2017 (Title Page Reprinted: December 8, 2017) 1 UL 60079-28 Standard for Explosive Atmospher
12、es Part 28: Protection of Equipment and Transmission Systems Using Optical Radiation Second Edition September 15, 2017 This ANSI/UL Standard for Safety consists of the Second Edition including revisions through December 8, 2017. The most recent designation of ANSI/UL 60079-28 as an American National
13、 Standard (ANSI) occurred on September 15, 2017. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page or Preface. The National Difference Page and IEC Foreword are also excluded from the ANSI approval of IEC-based standards. Comments or proposals for revisions
14、on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at https:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should
15、 be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2017 UNDERWRITERS LABORATORIES INC. ANSI/UL 60079-28-2017UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR
16、DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 15, 2017 UL 60079-28 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS Preface (UL) 4 National Differences 6 FOREWORD 7 INTRODUCTION . 11 1 Scope .13 2 Normative
17、references .15 3 Terms and denitions 15 4 General requirements 18 5 Types of protection .19 5.1 General 19 5.2 Requirements for inherently safe optical radiation “op is” .20 5.3 Requirements for protected optical radiation “op pr” .27 5.4 Optical system with interlock “op sh” .28 6 Type verications
18、and tests .29 6.1 Test set-up for ignition tests 29 6.2 Verication of suitability of test set-up for type tests .30 6.3 Type tests 31 7 Marking .34 Annex A (informative) Reference test data Annex B (informative) Ignition mechanisms 2 Annex C (normative) Ignition hazard assessment Annex D (informativ
19、e) Typical optical bre cable design Annex E (normative) Flow diagram for the assessment of pulses Annex DVF (normative) Requirements for Division 1 and Division 2 equipment and transmission systems using optical radiation DVF.1 Application .50 DVF.2 General .50 DVF.3 Marking .51 Bibliography SEPTEMB
20、ER 15, 2017 UL 60079-28 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Preface (UL) This UL Standard is based on IEC Publication 60079-28: second edition Explosive Atmospheres - Part 28: Protection of Equipment and Transmission Systems Usi
21、ng Optical Radiation, as revised by IEC corrigendum 1. IEC publication 60079-28 is copyrighted by the IEC. Efforts have been made to synchronize the UL edition number with that of the corresponding IEC standard with which this standard is harmonized. As a result, one or more UL edition numbers have
22、been skipped to match that of the IEC edition number. The ISA-60079-28:2012 standard is being maintained until September 15, 2022 for reference purposes only. The text, gures and tables of IEC Publication Explosive Atmospheres Part 28: Protection of Equipment and Transmission Systems Using Optical R
23、adiation, IEC 60079-28, copyright May 2015 are used in this Standard with the consent of the IEC and the American National Standards Institute (ANSI). The IEC copyrighted material has been reproduced with permission from ANSI. ANSI should be contacted regarding the reproduction of any portion of the
24、 IEC material. The IEC Foreword and Introduction are not a part of the requirements of this Standard but are included for information purposes only. Copies of IEC Publication 60079-28 may be purchased from ANSI, 11 West 42nd Street, New York, New York, 10036, (212) 642-4900. These materials are subj
25、ect to copyright claims of IEC and UL. No part of this publication may be reproduced in any form, including an electronic retrieval system, without the prior written permission of UL. All requests pertaining to this Standard should be submitted to UL. Note Although the intended primary application o
26、f this Standard is stated in its Scope, it is important to note that it remains the responsibility of the users of the Standard to judge its suitability for their particular purpose. The following people served as members of STP 60079 and participated in the review of this standard: NAME COMPANY *B.
27、 Zimmermann, Chair R Stahl Inc. *T. Adam FM Approvals LLC R. Allen Honeywell Inc. D. Ankele UL LLC S. Bihler-Lopez CML Inc. S. Blais Appleton Group K. Boegli KBB Consulting R. Brownlee Pepperl + Fuchs Inc. D. Burns Shell P any IEC National Committee interested in the subject dealt with may participa
28、te in this preparatory work. International, governmental and nongovernmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between
29、the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications h
30、ave the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any mi
31、sinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding nat
32、ional or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certication bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services c
33、arried out by independent certication bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Co
34、mmittees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn
35、 to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not b
36、e held responsible for identifying any or all such patent rights. International Standard IEC 60079-28 has been prepared by IEC technical committee 31: Equipment for explosive atmospheres. This second edition cancels and replaces the rst edition, published in 2006, and constitutes a technical revision. SEPTEMBER 15, 2017 UL 60079-28 7
