UL 248-10-2011 UL Standard for Safety Low-Voltage Fuses - Part 10 Class L Fuses (Third Edition Reprint with revisions through and including January 13 2017)《低压熔断器 第10部分 L级熔断器》.pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 248-10 Low-Voltage Fuses - Part 10: Class L FusesUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED

2、 FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Low-Voltage Fuses - Part 10: Class L Fuses, UL 248-10 Third Edition, Dated May 13, 2011 Summary of Topics This revision of ANSI/UL 24810 is being issued to reaffirm approval as an American National Standa

3、rd. No changes in requirements are involved. As noted in the Commitment for Amendments statement located on the back side of the title page, UL, CSA, and ANCE are committed to updating this harmonized standard jointly. However, the revision pages dated (June 26, 2015) will not be jointly issued by U

4、L, CSA, and ANCE as these revision pages only address UL 24810 ANSI approval dates. The new requirements are substantially in accordance with Proposal(s) on this subject dated June 26, 2015. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmit

5、ted in any form by any means, electronic, mechanical 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 a

6、ny purpose. In no event will UL be liable for 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

7、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 Standards for Safety agree to defend, indemnify, and hold UL harmless from and

8、 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 system. The requirements in this Standard are now in effect, except fo

9、r those paragraphs, sections, tables, gures, and/or other elements of the Standard having future effective dates as indicated on this transmittal notice. The prior text for requirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a

10、 SUPERSEDED REQUIREMENTS notice. AUGUST 18, 2015 UL 248-10 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 18, 2015 UL 248-10 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION W

11、ITHOUT PERMISSION FROM UL Association of Standardization and Certication NMX-J-009/248/10-ANCE Second Edition Canadian Standards Association CSA C22.2 No. 248.10-11 Third Edition Underwriters Laboratories Inc. UL 248-10 Third Edition Low-Voltage Fuses Part 10: Class L Fuses May 13, 2011 (Title Page

12、Reprinted: August 18, 2015) ANSI/UL 248-10-2011 (R2015)UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Commitment for Amendments This standard is issued jointly by the Association of Standardization and Certication (ANCE), the Canadian Stand

13、ards Association (operating as “CSA Group”), and Underwriters Laboratories Inc. (UL). Comments or proposals for revisions on any part of the standard may be submitted to ANCE, CSA Group, or UL at anytime. Revisions to this standard will be made only after processing according to the standards develo

14、pment procedures of ANCE, CSA Group, and UL. CSA Group and UL will issue revisions to this standard by means of a new edition or revised or additional pages bearing their date of issue. ANCE will incorporate the same revisions into a new edition of the standard bearing the same date of issue as the

15、CSA Group and UL pages. Copyright 2011 Rights reserved in favor of ANCE. ISBN 978-1-55491-640-5 2011 CSA Group All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher. CSA Standards are subject to periodic review, and su

16、ggestions for their improvement will be referred to the appropriate committee. To submit a proposal for change to CSA Standards, please send the following information to inquirescsa.ca and include Proposal for change in the subject line: Standard designation (number); relevant clause, table, and/or

17、gure number; wording of the proposed change; and rationale for the change. To purchase CSA Standards and related publications, visit CSAs Online Store at www.ShopCSA.ca or call toll-free 1-800-463-6727 or 416-747-4044. Copyright 2015 Underwriters Laboratories Inc. ULs Standards for Safety are copyri

18、ghted 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. This ANSI/UL Standard for Safety consists of the Third Edition

19、including revisions through August 18, 2015. The most recent designation of ANSI/UL 248-10 as an American National Standard (ANSI) occurred on August 18, 2015. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page (front and back), or the Preface. Comments or pr

20、oposals 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 Collaborative Standards Development System (CSDS) at http:/. To purchase UL Standards, visit Comm 2000 at http:/m- or call toll-free 1-888-853-350

21、3.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS Preface .4 1 General 6 1.1 Scope .6 4 Classication .6 5 Characteristics 6 5.2 Voltage rating 6 5.3 Current rating 6 5.5 Interrupting rating .6 5.6 Peak let-through current and cleari

22、ng I 2 t characteristics .7 6 Marking 8 7 Construction 8 7.1 Dimensions 8 7.2 Current-carrying parts .8 8 Tests .10 8.2 Verication of temperature rise and current-carrying capacity .10 8.3 Verication of overload operation 11 8.4 Verication of operation at rated voltage .11 8.5 Verication of peak let

23、-through current and clearing I 2 t characteristics .12 MAY 13, 2011 NMX-J-009/248/10-ANCE CSA C22.2 NO. 248.10-11 UL 248-10 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Preface This is the harmonized ANCE, CSA, and UL standard for Low-V

24、oltage Fuses Part 10: Class L Fuses. It is the second edition of NMX-J-009/248/10-ANCE, the third edition of CSA C22.2 No. 248.10-11, and the third edition of UL 248-10. This edition of NMX-J-009-248/10-ANCE cancels the previous edition published in 2000. This edition of CSA C22.2 No. 248.10-11 supe

25、rsedes the previous edition published in 2000. This harmonized standard was prepared by the Association of Standardization and Certication (ANCE), the Canadian Standards Association (CSA), and Underwriters Laboratories Inc., (UL). This Standard is considered suitable for use for conformity assessmen

26、t within the stated scope of the Standard. The present Mexican Standard was developed by the CT 32 from the Comite de Normalizacion de la Asociacion de Normalizacion y Certicacion, A.C., CONANCE, with the collaboration of the fuse manufacturers and users. This standard was reviewed by the CSA Subcom

27、mittee on Fuses and Fuseholders, under the jurisdiction of the CSA Technical Committee on Industrial Products and the CSA Strategic Steering Committee on Requirements for Electrical Safety, and has been formally approved by the CSA Technical Committee. This standard has been approved by the American

28、 National Standards Institute (ANSI) as an American National Standard. 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. Where reference is made to a speci

29、c number of samples to be tested, the specied number is to be considered a minimum quantity. Note: 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 t

30、heir particular purpose. Level of Harmonization This standard is published as an identical standard for ANCE, CSA, and UL. An identical standard is a standard that is exactly the same in technical content except for national differences resulting from conicts in codes and governmental regulations. P

31、resentation is word for word except for editorial changes. Interpretations The interpretation by the standards development organization of an identical or equivalent standard is based on the literal text to determine compliance with the standard in accordance with the procedural rules of the standar

32、ds development organization. If more than one interpretation of the literal text has been identied, a revision is to be proposed as soon as possible to each of the standards development organizations to more accurately reect the intent. MAY 13, 2011 NMX-J-009/248/10-ANCE CSA C22.2 NO. 248.10-11 UL 2

33、48-10 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL ANCE Effective Date The effective date for ANCE will be announced through the Diario Ocial de la Federacin (Official Gazette) and is indicated on the cover page. CSA Effective Date The e

34、ffective date for CSA International will be announced through CSA Informs or a CSA certication notice. UL Effective Date As of May 13, 2011 all products Listed or Recognized by UL must comply with the requirements in this standard. A UL effective date is one established by Underwriters Laboratories

35、Inc. and is not part of the ANSI approved standard. MAY 13, 2011 NMX-J-009/248/10-ANCE CSA C22.2 NO. 248.10-11 UL 248-10 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Low-Voltage Fuses Part 10: Class l Fuses 1 General NOTE This Part is in

36、tended to be read together with the Standard for Low-Voltage Fuses Part 1: General Requirements, hereafter referred to as Part 1. The numbering of the clauses in this Part corresponds to like numbered Clauses in Part 1. The requirements of Part 1 apply unless modied by this Part. For Clauses not sho

37、wn below, refer to the Standard for Low-Voltage Fuses Part 1: General Requirements, NMX-J-009/248/1-ANCE CSA C22.2 No. 248.1-11 UL 248-1. 1.1 Scope This Part applies to Class L fuses rated 100 6000 A and 600 V ac. DC ratings are optional. 4 Classication Class L fuses are non-renewable, current-limit

38、ing bolt-in type with an interrupting rating of 200,000 A, or at the manufacturers option 300,000 A . Class L fuses are divided into nine body sizes with the maximum current rating I n for each size specied in this part. Time-delay ratings are optional. 5 Characteristics 5.2 Voltage rating For AC, t

39、he rating shall be 600 V ac. The DC voltage rating may be different from the AC rating. 5.3 Current rating Refer to Figure A for the range of current ratings in each body size. 5.5 Interrupting rating For AC, 200,000 A or 300,000 A at the manufacturers option (300,000 A not applicable in Mexico). Fo

40、r DC, the preferred ratings are 20,000, 50,000, 100,000, 150,000, 200,000, or 300,000 A. MAY 13, 2011 NMX-J-009/248/10-ANCE CSA C22.2 NO. 248.10-11 UL 248-10 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 5.6 Peak let-through current and c

41、learing I 2 t characteristics Maximum values of peak let-through current and clearing I 2 t are given in Table A (see 8.5.3). Peak let-through currents shall not exceed the levels dened by the appropriate Let Through Function specied in Table A, as veried through measurement of peak let-through curr

42、ents at 50, 100, 200, and, if applicable, 300 kA. Clearing I 2 t values recorded shall not exceed the limits specied in Table A as veried through measurement of clearing I 2 t values at 50, 100, 200, and, if applicable, 300 kA. Table A Maximum peak let-through current and clearing I 2 t for 600 volt

43、 Class L fuses Current rating I n ,A Between threshold and 50 kA At 100 kA At 200 kA At 300 kA, if applicable Peak Let- through Function Peak let- through current, A I 2 t, ampere- squared seconds Peak let- through current, A I 2 t, ampere- squared seconds Peak let- through current, A I 2 t, ampere-

44、 squared seconds Peak let- through current, A I 2 t, ampere- squared seconds 100 12,000 60,000 14,000 80,000 20,000 80,000 28,367 96,000 Y = 1E-07x 2 + 0.02x + 10667 101 200 16,000 200,000 20,000 300,000 30,000 300,000 42,367 360,000 Y = 1E-07x 2 + 0.06x + 12667 201 400 25,000 1,000,000 30,000 1,100

45、,000 45,000 1,100,000 66,367 1,320,000 Y = 3E-07x 2 + 0.05x + 21667 401 600 35,000 2,500,000 45,000 2,500,000 70,000 2,500,000 101,367 3,000,000 Y = 3E-07x 2 + 0.15x + 26667 601 800 80,000 10,000,000 80,000 10,000,000 80,000 10,000,000 79,200 12,000,000 Y = -6E-07x 2 + 0.3287x + 30712 801 1200 80,00

46、0 12,000,000 80,000 12,000,000 120,000 15,000,000 107,800 18,000,000 Y = -4E-07x 2 + 0.3206x + 48138 1201 1600 100,000 22,000,000 100,000 22,000,000 150,000 30,000,000 143,000 36,000,000 Y = -9E-07x 2 + 0.5678x + 52225 1601 2000 110,000 35,000,000 120,000 35,000,000 165,000 40,000,000 158,400 48,000

47、,000 Y = -8.44E- 07x 2 + 0.552x + 69400 2001 2500 165,000 75,000,000 180,000 75,000,000 170,500 90,000,000 Y = -8E-07x 2 + 0.5775x + 71500 2501 3000 175,000 100,000,000 200,000 100,000,000 225,500 120,000,000 Y = -8E-07x 2 + 0.6875x + 93500 3001 4000 220,000 150,000,000 250,000 150,000,000 286,000 1

48、80,000,000 Y = -1E-06x 2 + 1.035x + 97000 4001 5000 350,000,000 300,000 350,000,000 286,000 420,000,000 MAY 13, 2011 NMX-J-009/248/10-ANCE CSA C22.2 NO. 248.10-11 UL 248-10 7 Table A Maximum peak let-through current and clearing I 2 t for 600 volt Class L fuses Continued on Next PageUL COPYRIGHTED M

49、ATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Table A Maximum peak let-through current and clearing I 2 t for 600 volt Class L fuses Continued Current rating I n ,A Between threshold and 50 kA At 100 kA At 200 kA At 300 kA, if applicable Peak Let- through Function Peak let- through current, A I 2 t, ampere- squared seconds Peak let-