UL 60079-28-2017 UL Standard for Safety Explosive Atmospheres C Part 28 Protection of Equipment and Transmission Systems Using Optical Radiation (Second Edition Reprint with revisi.pdf

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 Adoption of IEC 60079-28, Edition 2.0 (2015-05), Explosive Atmospheres - Part 28: Protection of Equipment and Transmission Systems Using Optical Radiation, as a new IEC-based UL standard, UL 60079-28 with US National Differences. The requirem

4、ents are substantially in accordance with Proposal(s) on this subject dated December 23, 2016 and July 28, 2017. THIS 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 AS OF SEPTEMBER 15, 2022, ISA-60079-28:2012 WILL BE WITHDRAWN.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 th

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9、uter system. SEPTEMBER 15, 2017 UL 60079-28 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 15, 2017 UL 60079-28 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PER

10、MISSION FROM UL SEPTEMBER 15, 2017 1 UL 60079-28 Standard for Explosive Atmospheres 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. The most recent designation of ANSI

11、/UL 60079-28 as an American National 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.

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13、electronic copy of a Standard should 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 AUT

14、HORIZED FOR FURTHER REPRODUCTION OR 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 INTROD

15、UCTION . 11 1 Scope .13 2 Normative 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 inter

16、lock “op sh” .28 6 Type verications 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 h

17、azard assessment Annex D (informative) 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 DV

18、F.3 Marking .51 Bibliography SEPTEMBER 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 Eq

19、uipment and Transmission Systems Using 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,

20、one or more UL edition numbers have 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

21、Transmission Systems Using Optical Radiation, 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 th

22、e reproduction of any portion of the 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

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24、h the intended primary application of 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 revie

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34、ct of patent rights. IEC shall not be 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