ISA 60079-11-2013 Explosive Atmospheres - Part 11 Equipment protection by intrinsic safety i (Edition 6 2 12 02 01).pdf

1、 AMERICAN NATIONAL STANDARD ANSI/ISA-60079-11 (12.02.01)-2014 Supersedes ANSI/ISA-60079-11 (12.02.01)-2013 Explosive Atmospheres Part 11: Equipment protection by intrinsic safety “i” (Edition 6.2) Approved 28 March 2014 Commitment for Amendments This standard is issued jointly by ISA and Underwriter

2、s Laboratories Incorporated (UL). Comments or proposals for revisions on any part of the standard may be submitted to ISA or UL at any time. Revisions to this standard will be made only after processing according to the standards development procedures of ISA and UL. ISA and UL will issue revisions

3、to this standard by means of a new edition or revised or additional pages bearing their date of issue. ISBN: 978-0-876640-81-4 Copyright 2014 By ISA These materials are subject to copyright claims of IEC, ANSI, and ISA. All rights reserved. Not for resale. Printed in the United States of America. No

4、 part of this publication may be reproduced in any form, including an electronic retrieval system, without the prior written permission of ISA. All requests pertaining to this standard should be submitted to ISA. Copyright 2014 Underwriters Laboratories Incorporated Revisions of this standard will b

5、e made by issuing revised or additional pages bearing their date of issue. A UL standard is current only if it incorporates the most recently adopted revisions, all of which are itemized on the transmittal notice that accompanies the latest set of revised requirements. The most recent designation of

6、 ANSI/ISA-60079-11 and ANSI/UL 60079-11 as American National Standards occurred on 28 March 2014. This ANSI/UL Standard for Safety, which consists of the sixth edition, is under continuous maintenance, whereby each revision is ANSI approved upon publication. Comments or proposals for revisions on an

7、y 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 http:/. ISA Underwriters Laboratories Inc. ANSI/ISA60079-11 ANSI/UL 60079-11 Edition 6.2 Sixth Edition Explosive atmosph

8、eres Part 11: Equipment protection by intrinsic safety “i” This page intentionally left blank.ANSI/ISA-60079-11 - 5 - ANSI/UL 60079-11 28 March 2014 General Notes This is the common ISA and UL standard for Explosive atmospheres - Part 11: Equipment protection by intrinsic safety “i”. It is edition 6

9、.2 of ANSI/ISA-60079-11 (superseding ANSI/ISA-60079-11-2013) and edition 6 of ANSI/UL 60079-11. ANSI/ISA-60079-11 and ANSI/UL 60079-11 contain identical requirements, with the publication date of. The presentation and format of the standards material may differ between the two published standards. T

10、his common standard was prepared by ISA and Underwriters Laboratories Inc. (UL). Although 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 pu

11、rpose. Level of harmonization This standard adopts the IEC text with deviations. The requirements are presented in different formats. The ISA version of the standard illustrates the national differences from the IEC text through the use of legislative text (strike -out and underline). The UL version

12、 of the standard illustrates national differences immediately following the IEC text. National differences between the UL version and the ISA version shall be word for word except for editorial changes. Interpretations The interpretation by the SDO of an identical or equivalent standard shall be bas

13、ed on the literal text to determine compliance with the standard in accordance with the procedural rules of the SDO. If more than one interpretation of the literal text has been identified, a revision shall be proposed as soon as possible to each of the SDOs to more accurately reflect the intent . U

14、L Effective Date The effective date for UL is the date of publication. However, the fifth edition of UL 60079 -11 will also be effective until 1 September 2018. A UL effective date is one established by Underwriters Laboratories Inc. and is not part of the ANSI approved standard. This page intention

15、ally left blank. ANSI/ISA-60079-11 - 7 - ANSI/UL 60079-11 28 March 2014 Preface (ISA) This ISA standard is based on the 6th edition of IEC Publication 60079-11 including Corrigendum 1. It is the intention of the ISA12 Committee to develop an ANSI Standard that is harmonized with IEC 60079-11 to the

16、fullest extent possible. This preface is included for informational purposes and is not part of ANSI/ISA-60079-11. The document is a modification of the IEC document and includes U.S. deviations encompassing both additions and deletions of information. The entire text of IEC 60079-11:2011 is include

17、d in this document including Corrigendum 1. U.S. National Deviations are shown by strikeout through deleted text and underlining of added text. Tables, or portions of tables, that are to be deleted are shown as shaded; figures to be deleted are marked with the overlay “X.“ Some tables have been refo

18、rmatted to allow for US standard paper sizes. There are ten annexes in this standard. Annexes A, B, D, F and G are normative and form part of the requirements of this standard. Annexes C, E, H, I and J are informative and are not considered part of this standard. The significant changes with respect

19、 to the previous edition are listed below: Inclusion of non-edition specific references to ANSI/ISA-60079-0. The merging of the apparatus requirements for FISCO from ANSI/ISA-60079-27. The merging of the requirements for combustible dust atmospheres from ANSI/ISA-61241-11. Clarification of the requi

20、rements for accessories connected to intrinsically safe apparatus; such as chargers and data loggers. Addition of new test requirements for opto-isolators. Introduction of Annex H about ignition testing of semiconductor limiting power supply circuits. Clarification of the spacing requirements applic

21、able to protective fuses. The standards referenced within this document may contain provisions which, through reference in this text, constitute requirements of this document. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreeme

22、nts based on this document are encouraged to investigate the possibility of applying the most recent editions of the standards indicated within this document. Members of IEC and ISO maintain registers of currently valid International Standards. ANSI maintains registers of currently valid U.S. Nation

23、al Standards. This document has been prepared as part of the service of ISA toward a goal of uniformity in the field of instrumentation. To be of real value, this document should not be static but should be subject to periodic review. Toward this end, the Society welcomes all comments and criticisms

24、 and asks that they be addressed to the Secretary, Standards and Practices Board; ISA; 67 Alexander Drive; P. O. Box 12277; Research Triangle Park, NC 27709; Telephone (919) 549-8411; Fax (919) 549-8288; E-mail: standardsisa.org. The ISA Standards and Practices Department is aware of the growing nee

25、d for attention to the metric system of units in general, and the International System of Units (SI) in particular, in the preparation of instrumentation standards. The Department is further aware of the benefits to USA users of ISA standards of incorporating suitable references to the SI (and the m

26、etric system) in their business and professional dealings with other countries. Toward this end, this Department will endeavour to introduce SI-acceptable metric units in all new and revised standards, recommended practices, and technical reports to the greatest extent possible. IEEE/ASTM SI 10, Ame

27、rican National Standard for Metric Practice, and future revisions, will be the reference guide for definitions, symbols, abbreviations, and conversion factors. It is the policy of ISA to encourage and welcome the participation of all concerned individuals and interests in the development of ISA stan

28、dards, recommended practices, and technical reports. Participation in the ISA standards-making process by an individual in no way constitutes endorsement by the employer of that 28 March 2014 ANSI/ISA-60079-11 - 8 - ANSI/UL 60079-11 individual, of ISA, or of any of the standards, recommended practic

29、es, and technical reports that ISA develops. CAUTION ISA DOES NOT TAKE ANY POSITION WITH RESPECT TO THE EXISTENCE OR VALIDITY OF ANY PATENT RIGHTS ASSERTED IN CONNECTION WITH THIS DOCUMENT, AND ISA DISCLAIMS LIABILITY FOR THE INFRINGEMENT OF ANY PATENT RESULTING FROM THE USE OF THIS DOCUMENT. USERS

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36、ISHED SAFETY AND HEALTH PRACTICES BEFORE IMPLEMENTING THIS DOCUMENT. THE USER OF THIS DOCUMENT SHOULD BE AWARE THAT THIS DOCUMENT MAY BE IMPACTED BY ELECTRONIC SECURITY ISSUES. THE COMMITTEE HAS NOT YET ADDRESSED THE POTENTIAL ISSUES IN THIS VERSION. The following people served as members of ISA12.2

37、: NAME COMPANY T. Adam, Chair FM Approvals M. Coppler*, Managing Director Det Norske Veritas Certification Inc. N. Abbatiello Speer Equipment Inc. R. Allen Honeywell Inc. S. Arnold Ametek Drexelbrook R. Brownlee Pepperl therefore the term “equipment” used in the standard always means “electrical equ

38、ipment”. If associated apparatus is placed in the explosive atmosphere, it shall be protected by an appropriate Type of Protection listed in ANSI/ISA-60079-0 IEC 60079-0, and then the requirements of that method of protection together with the relevant parts of ANSI/ISA-60079-0 IEC 60079-0, also app

39、ly to the associated apparatus. 28 March 2014 ANSI/ISA-60079-11 - 18 - ANSI/UL 60079-11 Table 1 Applicability of specific clauses of ANSI/ISA-60079-0 IEC 60079-0, Clause or subclause of ANSI/ISA-60079-0 IEC 60079-0, ANSI/ISA-60079-0 IEC 60079-0, clause application to IEC 60079-11 ANSI/ISA-60079-11 I

40、ntrinsically safe apparatus Associated apparatus Ed. 5.0 (2007) (informative) Ed. 6.0 (2011) (informative) Clause / Subclause title (normative) Group I and Group II Group III 1 1 Scope Applies Applies Applies 2 2 Normative references Applies Applies Applies 3 3 Terms and definitions Applies Applies

41、Applies 4 4 Equipment grouping Applies Applies Applies 4.1 4.1 Group I Applies Excluded Applies 4.2 4.2 Group II Applies Excluded Applies 4.3 4.3 Group III Excluded Applies Applies 4.4 4.4 Equipment for a particular explosive atmosphere Applies Applies Applies 5.1 5.1 Environmental influences Applie

42、s Applies Applies 5.1.1 5.1.1 Ambient temperature Applies Applies Applies 5.1.2 5.1.2 External source of heating or cooling Applies Applies Applies 5.2 5.2 Service temperature Applies Applies Applies 5.3.1 5.3.1 Determination of maximum surface temperature Applies Applies Excluded 5.3.2.1 5.3.2.1 Gr

43、oup I electrical equipment Applies Excluded Excluded 5.3.2.2 5.3.2.2 Group II electrical equipment Applies Excluded Excluded 5.3.2.3 5.3.2.3 Group III electrical equipment Excluded Applies Excluded 5.3.3 5.3.3 Small component temperature for Group I or Group II electrical equipment Applies Excluded

44、Excluded 6.1 6.1 General Applies Applies Applies 6.2 6.2 Mechanical strength of equipment Excluded except when 6.1.2.3a) is applied Excluded except when 6.1.3 a) is applied. Excluded except when 6.1.2.3a) is applied 6.3 6.3 Opening times Excluded Excluded Excluded 6.4 6.4 Circulating currents in enc

45、losures (e.g. of large electrical machines) Excluded Excluded Excluded 6.5 6.5 Gasket retention Excluded except when 6.1.2.3a)is applied Excluded except when 6.1.3 a) is applied. Excluded except when 6.1.2.3a) is applied ANSI/ISA-60079-11 - 19 - ANSI/UL 60079-11 28 March 2014 Clause or subclause of

46、ANSI/ISA-60079-0 IEC 60079-0, ANSI/ISA-60079-0 IEC 60079-0, clause application to IEC 60079-11 ANSI/ISA-60079-11 Intrinsically safe apparatus Associated apparatus Ed. 5.0 (2007) (informative) Ed. 6.0 (2011) (informative) Clause / Subclause title (normative) Group I and Group II Group III 6.6 6.6 Ele

47、ctromagnetic and ultrasonic radiating equipment Applies Applies Excluded 7.1.1 7.1.1 Applicability Excluded except when 6.1.2.3a) is applied Excluded except when 6.1.3 a) is applied. Excluded except when 6.1.2.3a) is applied 7.1.2 7.1.2.1 Specification of materials Excluded except when 6.1.2.3a) is

48、applied Excluded except when 6.1.3 a) is applied. Excluded except when 6.1.2.3a) is applied 7.1.3 7.1.2.2 Plastic materials Excluded except when 6.1.2.3a) is applied Excluded except when 6.1.3 a) is applied. Excluded except when 6.1.2.3a) is applied 7.1.4 7.1.2.3 Elastomers Excluded except when 6.1.

49、2.3a) is applied Excluded except when 6.1.3 a) is applied. Excluded except when 6.1.2.3a) is applied 7.2 7.2 Thermal endurance Excluded except when 6.1.2.3a) is applied Excluded except when 6.1.3 a) is applied. Excluded except when 6.1.2.3a) is applied 7.3 7.3 Resistance to light Excluded except when 6.1.2.3a) is applied Excluded except when 6.1.3 a) is applied. Excluded except when 6.1.2.3a) is applied 7.4 7.4 Electrostatic charges on external non-metallic materials Applies Applies Excluded NR 7.5 Accessible metal parts Applies Applies Excluded 7.5