1、 AMERICAN NATIONAL STANDARD ANSI/ISA-12.20.01-2009 (R2014) General Requirements for Electrical Ignition Systems for Internal Combustion Engines in Class I, Division 2 or Zone 2, Hazardous (Classified) Locations Approved 29 August 2014 ANSI/ISA-12.20.01-2009 (R2014) General Requirements for Electrica
2、l Ignition Systems for Internal Combustion Engines in Class I, Division 2 or Zone 2, Hazardous (Classified) Locations ISBN: 978-0-876640-94-4 Copyright 2014 by the International Society of Automation. All rights reserved. Not for resale. Printed in the United States of America. No part of this publi
3、cation may be reproduced, stored in a retrieval system, or transmitted in any form or by any means (electronic mechanical, photocopying, recording, or otherwise), without the prior written permission of the Publisher. ISA 67 Alexander Drive P.O. Box 12277 Research Triangle Park, North Carolina 27709
4、 UL Standard for Safety for General Requirements for Electrical Ignition Systems for Internal Combustion Engines in Class I, Division 2 or Zone 2, Hazardous (Classified) Locations, ANSI/UL 122001 First Edition, Dated 29 August 2014 Summary of Topics Adoption of ANSI/ISA-12.20.01, General Requirement
5、s for Electrical Ignition Systems for Internal Combustion Engines in Class I, Division 2 or Zone 2, Hazardous (Classified) Locations as an ANSI/UL 122001, First Edition to reflect the reaffirmation of ANSI approval. No changes in requirements have been made. As noted in the Commitment for Amendments
6、 statement, UL and ISA are committed to updating this co-designated standard jointly after processing according to the standards development procedures by UL. The revisions are substantially in accordance with Proposal(s) on this subject dated 27 June 2014. All rights reserved. No part of this publi
7、cation may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard as iswithout warranty of any kind, either expressed or implied, including but not li
8、mited to, the implied warranties of merchantability or fitness for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, including loss of profits, lost savings, loss of data, or any other damages arising out of the use of or the inabilit
9、y to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic versions of ULs Standard
10、s for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, 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
11、system. The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, figures, and/or other elements of the Standard having future effective dates as indicated in the preface. The prior text for requirements that have been revised and that have a future effectiv
12、e date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. This page intentionally left blank. ISA The International Society of Automation ANSI/ISA-12.20.01-2009 (R2014) First Edition Underwriters Laboratories Inc. ANSI/UL 122001 First Edition General Requirements f
13、or Electrical Ignition Systems for Internal Combustion Engines in Class I, Division 2 or Zone 2, Hazardous (Classified) Locations 29 August 2014 ANSI/UL 122001-2009 (R2014) This page intentionally left blank. Commitment for Amendments This Standard is issued jointly by ISA and Underwriters Laborator
14、ies 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 by UL. ISA and UL will issue revisions to this Standard by
15、 means of a new edition or revised or additional pages bearing their date of issue. ISBN: 978-0-876640-94-4 Copyright 2014 By ISA All rights reserved. Not for resale. Printed in the United States of America. No part of this publication may be reproduced, stored in a retrieval system, or transmitted
16、in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise), without the prior written permission of the Publisher. The most recent designation of ANSI/ISA-12.20.01 as a Reaffirmed American National Standard (ANSI) occurred on 29 August 2014. Copyright 2014 Underwrite
17、rs Laboratories Incorporated ULs Standards for Safety are copyrighted by UL. Neither a printed nor 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.
18、 This ANSI/UL Standard for Safety consists of the First Edition. The most recent designation of ANSI/UL 122001 as a Reaffirmed American National Standard (ANS) occurred on 29 August 2014. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page (front and back), or
19、 the Preface. Comments or proposals for revisions 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 Collaboration Standards Development System (CSDS) at http:/. The purchase UL Standards, visit Comm 2000 at http:/m- or
20、 call toll-free 1-888-853-3503. This page intentionally left blank. Foreword ISA The following nonsubstantive changes in the main text were made to correct grammatical errors in ANSI/ISA-12.20.01-2009 (R2014) and do not affect the meaning of the text. UL will process these changes during the next te
21、chnical update to ANSI/UL 122001-2009 (R2014). In 6.6, fifth paragraph, the sentence “All flexible secondary leads utilized on skid shall demonstrate compatibility with all compounds in Table 3.” was modified to read “All flexible secondary leads shall demonstrate compatibility with all compounds in
22、 Table 3.” In 6.7, second paragraph, the sentence “The instructions must include directions for use of a engine spark plug thread port “GoNo-Go” gauge that will indicate if the port is compatible with the specific spark plug.” was modified to read “The instructions must include directions for use of
23、 an engine spark plug thread port “GoNo-Go” gauge that will indicate if the port is compatible with the specific spark plug.” In 11.1.2, second paragraph, the sentence “The radius of the surface of the emery cloth is to be cloth is to be 90 mm 6 mm (3.5 inches 0.25 inch).” was modified to read “The
24、radius of the surface of the emery cloth is to be 90 mm 6 mm (3.5 inches 0.25 inch).” In 11.10, first paragraph, the sentence “A representative sample of the ignition system including all components and wiring that is intended to be installed in a Class I, Division 2 or Zone 2 hazardous (classified)
25、 location shall be placed in an flammable atmosphere as indicated in Table 5 below.”.was modified to read “A representative sample of the ignition system including all components and wiring that is intended to be installed in a Class I, Division 2 or Zone 2 hazardous (classified) location shall be p
26、laced in a flammable atmosphere as indicated in Table 5 below.” In 11.15, second paragraph, the sentence “The points of impact shall be the places considered to be the weakest and shall be on the external parts which maybe exposed to impact.” was modified to read “The points of impact shall be the p
27、laces considered to be the weakest and shall be on the external parts which may be exposed to impact.” This page intentionally left blank. - 11 - ANSI/ISA-12.20.01-2009 (R2014) Contents General Notes 13 Preface ISA 15 1 Purpose . 19 2 Scope 19 3 References 19 4 Definitions . 19 5 General requirement
28、s . 22 6 Construction and testing requirements . 23 6.1 General 23 6.2 Power sources . 24 6.3 Ignition control unit . 24 6.4 Primary wires . 24 6.5 Ignition coils . 24 6.6 Secondary leads 25 6.7 Spark plugs 25 7 Spark containment 26 7.1 General 26 7.2 Secondary leads 26 7.3 Spark plugs 26 7.4 Termin
29、ations 27 8 Spark prevention . 27 8.1 General 27 8.2 Terminations 27 9 Spark detection/prevention . 27 10 Documentation and marking . 27 10.1 Surface temperature marking requirements 28 10.2 Manufacturers instructional manual 29 11 Test procedures 31 11.1 Abrasion test for secondary leads or wiring
30、. 32 11.2 Elevated temperature exposure test 36 11.3 Chemical compatibility . 36 11.4 Vibration test 38 11.5 Shielded secondary system tests 38 11.6 Spark plug pressure and temperature tests . 38 11.7 Secondary lead assembly flashover tests . 39 11.8 Secondary lead UV degradation tests . 40 11.9 Sec
31、ondary lead bending and dielectric voltage withstand tests 40 11.10 Spark prevention test . 40 11.11 Primary and secondary terminations pull test 41 11.12 Spark plug dielectric test 41 11.13 Secondary lead or wiring insulation cut test 42 11.14 Surface temperature test . 43 11.15 Impact test 43 11.1
32、6 Secondary lead pull test . 45 This page intentionally left blank. - 13 - ANSI/ISA-12.20.01-2009 (R2014) General Notes This is the common ISA and UL Standard for the General Requirements for Electrical Ignition Systems for Internal Combustion Engines in Class I, Division 2 or Zone 2, Hazardous (Cla
33、ssified) Locations. It is the first edition of ANSI/ISA-12.20.01 and the first edition of ANSI/UL 122001. The document is a modification of the ISA document to create the equivalent UL version and maintain the ANSI approval of this standard. ANSI/ISA-12.20.01 and ANSI/UL 122001 contain identical req
34、uirements, and identical publication dates. This common Standard was prepared by ISA The International Society of Automation on 4 May 2009 but is now being maintained by Underwriters Laboratories (UL). Note: Although the intended primary application of this Standard is stated in its Scope, it is imp
35、ortant to note that it remains the responsibility of the users of the Standard to judge its suitability for their particular purpose. UL Effective Date The requirements in this standard are effective 29 August 2014. A UL effective date is one established by Underwriters Laboratories Inc. and is not
36、part of the ANSI approved standard. This page intentionally left blank. - 15 - ANSI/ISA-12.20.01-2009 (R2014) Preface ISA This preface, as well as all footnotes and annexes, is included for information purposes and is not part of ANSI/ISA-12.20.01-2009 (R2014). This document has been prepared as par
37、t of the service of ISA towards 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 and asks that they be addressed to the Secretary,
38、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 need for attention to the metric system of units in ge
39、neral, 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 metric system) in their business and professional de
40、alings with other countries. Toward this end, this Department will endeavor to introduce SI-acceptable metric units in all new and revised standards, recommended practices, and technical reports to the greatest extent possible. Standard for Use of the International System of Units (SI): The Modern M
41、etric System, published by the American Society for Testing b) environmental conditions; c) minimum and maximum engine operating and cranking speeds; d) all removable parts in place; and e) all operator-accessible adjustments at their most unfavorable settings. 4.17 engine driven power source: any p
42、ower source that relies on mechanical energy from the engine for conversion to ignition system electrical energy. 4.18 external power source: any power source that relies on energy from a source other than the engine for ignition system electrical energy. 4.19 primary distribution system: the compon
43、ents that deliver the primary voltage and current from the power supply and ignition control unit to the ignition coil, including the coil primary terminations. 4.20 primary lead assembly: an assembly of primary wires interconnecting the ignition coil with the balance of the primary distribution sys
44、tem. 4.21 primary wire: an insulated conductor interconnecting the ignition control unit and the ignition coil. 4.22 primary voltage: the voltage produced across the primary of the ignition coil under normal operating conditions. 4.23 primary wiring harness: a group of wires transporting voltage to
45、the primary of the ignition coil. 4.24 raceway: an enclosure for routing, protecting, and supporting wires or cables. 4.25 rated: specified by the equipment manufacturer as the recommended maximum operating condition. 4.26 secondary distribution system: the component assembly that electrically inter
46、connects the ignition coil and the spark gap, including the coil secondary terminations. 4.27 secondary lead or secondary wiring: a part of the secondary distribution system, either rigid or flexible, electrically interconnecting the coil and the spark plug. 4.28 secondary voltage: the voltage produ
47、ced across the spark gap. ANSI/ISA-12.20.01-2009 (R2014) - 22 - 4.29 spark gap: the space between two conductors across which electrical energy is discharged. 4.30 spark plug: an electromechanical device that provides a spark gap intended to ignite a fuel mixture. 4.31 stationary: an installation th
48、at operates in a fixed location. 5 General requirements Any portion of an ignition system installed in a Class I, Division 2 or Zone 2 hazardous (classified) location shall not, under normal operating conditions, produce arcs, sparks, or heat that could ignite a surrounding flammable atmosphere. Thi
49、s may be achieved through conformance with the construction requirements of Clause 6 and at least one of the protection methods indicated in 5.1, 5.2 or 5.3. 5.1 Spark containment: Any portion of the ignition system in the Class I, Division 2 or Zone 2 hazardous (classified) location is constructed such that arcs or sparks that could occur under normal operating conditions are contained in a manner that precludes ignition of a surrounding flammable atmosphere. See Clause 7 for requirements for spark
