1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 248-10 Low-Voltage Fuses - Part 10: Class L Fuses STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MAT
2、ERIAL NOT AUTHORIZED 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 make an editorial correction
3、. No changes in requirements have been made. 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. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. The new requirements are substantially in accordance with Proposal(s) on this sub
5、ject dated June 26, 2015. 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, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard as is without wa
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7、a, 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 damage. In no event shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the fo
8、rm of the claim. Users of the electronic versions of ULs Standards 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 purcha
9、ser is storing an electronic Standard on the purchasers computer system. JANUARY 13, 2017 UL 248-10 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JANUARY 13, 2017 UL 248-10 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED
10、FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT 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 1
11、0: Class L Fuses May 13, 2011 (Title Page Reprinted: January 13, 2017) 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
12、 and Certication (ANCE), the Canadian Standards 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 p
13、rocessing according to the standards development 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 stan
14、dard bearing the same date of issue as the CSA Group and UL pages. Copyright 2017 Rights reserved in favor of ANCE. ISBN 978-1-55491-640-5 2017 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 Stand
15、ards are subject to periodic review, and suggestions 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 designatio
16、n (number); relevant clause, table, and/or 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 2017 Underwriters Laboratori
17、es Inc. 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. This ANSI/UL Standar
18、d for Safety consists of the Third Edition 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 (fron
19、t and back), or 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 Collaborative Standards Development System (CSDS) at https:/. To purchase UL Standards, visit Comm 2000
20、 at http:/m- or call toll-free 1-888-853-3503.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS Preface . 4 1 General 5 1.1 Scope .5 4 Classication 5 5 Characteristics .5 5.2 Voltage rating .5 5.3 Current rating 5 5.5 Interrupting rat
21、ing .5 5.6 Peak let-through current and clearing 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
22、at rated voltage 11 8.5 Verication of peak let-through current and clearing I 2 t characteristics .12 JANUARY 13, 2017 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 t
23、he harmonized ANCE, CSA, and UL standard for Low-Voltage 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
24、2000. This edition of CSA C22.2 No. 248.10-11 supersedes 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 co
25、nsidered suitable for use for conformity assessment 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 u
26、sers. This standard was reviewed by the CSA Subcommittee 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 Committe
27、e. This standard has been approved by the American 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 revise
28、d requirements. Where reference is made to a specic 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 us
29、ers of the standard to judge its suitability for their 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 fro
30、m conicts in codes and governmental regulations. Presentation 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 a
31、ccordance with the procedural rules of the standards 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
32、NMX-J-009/248/10-ANCE CSA C22.2 NO. 248.10-11 UL 248-10 4UL 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 intended to be read together with the Standard for Low-Voltage Fuse
33、s 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 shown below, refer to the Standard for Low-Voltage Fuses Part 1: Gen
34、eral 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-limiting bolt-in type with an interrupting rating of 200,000 A, or at
35、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, the rating shall be 600 V ac. The DC voltage rating may be differe
36、nt 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). For DC, the preferred ratings are 20,000, 50,000, 100,000, 150,000,
37、 200,000, or 300,000 A. JANUARY 13, 2017 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 JANUARY 13, 2017 NMX-J-009/248/10-ANCE CSA C22.2 NO. 248.10-11 UL 248-10 6 No Text on This Page
38、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 5.6 Peak let-through current and clearing 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 n
39、ot exceed the levels dened by the appropriate Let Through Function specied in Table A, as veried through measurement of peak let-through currents 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 o
40、f 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 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 curr
41、ent, 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- 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 +
42、 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 1,100,000 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 +
43、 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 80,000 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
44、,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 48,000,000 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 10
45、0,000,000 200,000 100,000,000 225,500 120,000,000 Y = -8E-07x 2 + 0.6875x + 93500 3001 4000 220,000 150,000,000 250,000 150,000,000 286,000 180,000,000 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
46、-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 MATERIAL 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
47、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- through current, A I 2 t, ampere- squared seconds Peak let- through current, A
48、I 2 t, ampere- squared seconds Peak let- through current, A I 2 t, ampere- squared seconds 5001 6000 350,000,000 350,000 500,000,000 399,300 600,000,000 6 Marking 6.1 Class L fuses may be marked Time Delay. 7 Construction 7.1 Dimensions Fuse dimensions are shown in Figures A and B. 7.2 Current-carry
49、ing parts 7.2.1 The terminals of Class L fuses shall be electroplated with nickel, silver, or tin, or treated by other means to provide equivalent protection. This is generated text for gtxt. MAY 13, 2011 NMX-J-009/248/10-ANCE CSA C22.2 NO. 248.10-11 UL 248-10 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Figure A
