UL 248-15-2018 UL Standard for Safety Low-Voltage Fuses C Part 15 Class T Fuses (Third Edition).pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 248-15 Low-Voltage Fuses - Part 15: Class T Fuses STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED

2、MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Low-Voltage Fuses - Part 15: Class T Fuses, UL 248-15 Third Edition, Dated March 9, 2018 Summary of Topics The third edition of the Standard for Safety for Low-Voltage Fuses - Part

3、15: Class T Fuses, UL 248-15, has been issued to reect the latest ANSI approval date, and to incorporate the following proposals: Corrections in the Table Included as Part of Figure B The revised requirements are substantially in accordance with Proposal(s) on this subject dated August 25, 2017. All

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8、Standard on the purchasers computer system. MARCH 9, 2018 UL 248-15 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 9, 2018 UL 248-15 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIB

9、UTION WITHOUT PERMISSION FROM UL Association of Standardization and Certication NMX-J-009/248/15-ANCE Third Edition CSA Group CAN/CSA-C22.2 No. 248.15-18 Third Edition Underwriters Laboratories Inc. UL 248-15 Third Edition Low-Voltage Fuses - Part 15: Class T Fuses March 9, 2018 ANSI/UL 248-15-2018U

10、L 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 Standards Association (operating as “CSA Group”), and Underwr

11、iters 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 development procedures of ANCE, CSA Group, and UL. CSA Group a

12、nd 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 CSA Group and UL pages. Copyright 2018 Rights reserved i

13、n favor of ANCE. ISBN 978-1-4883-1162-8 2018 Canadian Standards Association All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher. This Standard is subject to review within ve years from the date of publication, and su

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17、 most recent designation of ANSI/UL 248-15 as an American National Standard (ANSI) occurred on March 9, 2018. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page (front and back), or the Preface. The National Difference Page and IEC Foreword are also excluded

18、from the ANSI approval of IEC-based standards. 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 Standard

19、s, visit ULs Standards Sales Site at http:/ HowToOrder.aspx 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 6 1.1 Scope .6 4 Classication .6 5 Characteristics6 5.2 Voltage rating

20、6 5.3 Current rating 6 5.5 Interrupting rating.6 5.6 Peak let through current and clearing I 2 t characteristics .7 7 Construction8 7.1 Dimensions 8 8 Tests .13 8.2 Verication of temperature rise and current-carrying capacity .13 8.3 Verication of overload operation 14 8.4 Verication of operation at

21、 rated voltage .14 8.5 Verication of peak let-through current and clearing I 2 t characteristics .15 MARCH 9, 2018 NMX-J-009/248/15-ANCE CAN/CSA-C22.2 NO. 248.15-18 UL 248-15 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL PREFACE This is t

22、he harmonized ANCE, CSA Group, and UL standard for Low-Voltage Fuses - Part 15: Class T Fuses. It is the third edition of NMX-J-009/248/15-ANCE, the third edition of CAN/CSA-C22.2 No. 248.15, and the third edition of UL 248-15. This edition of NMX-J-009/248/15-ANCE supersedes the previous edition pu

23、blished on August 1, 2000. This edition of CAN/CSA-C22.2 No. 248.15 supersedes the previous edition published on August 1, 2000. This edition of UL 248-15 supersedes the previous edition published on August 1, 2000. This harmonized standard was prepared by the Association of Standardization and Cert

24、ication, (ANCE), CSA Group, and Underwriters Laboratories Inc. (UL). The efforts and support of the Technical Harmonization Subcommittee, CANENA THC 32, Low Voltage Fuses and Fuseholders on the Harmonization of Electrotechnical Standards of the Nations of the Americas (CANENA), are gratefully acknow

25、ledged. This standard is considered 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 t

26、he fuse manufacturers and users. 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

27、 the CSA Technical Committee. This standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group. This standard has been approved by the American National Standards Institu

28、te (ANSI) as an American National Standard. Application of Standard 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

29、to note that it remains the responsibility of the users 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 Group, and UL. An identical standard is a standard that is exactly the same in techn

30、ical content except for national differences resulting from conicts in codes and governmental regulations. Presentation is word for word except for editorial changes. MARCH 9, 2018 NMX-J-009/248/15-ANCE CAN/CSA-C22.2 NO. 248.15-18 UL 248-15 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODU

31、CTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 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 standards develop

32、ment 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. The following revisions have been formally approved: Figure B Dimension o

33、f knife blade type Class T fuses in mm (in) a - Table B. MARCH 9, 2018 NMX-J-009/248/15-ANCE CAN/CSA-C22.2 NO. 248.15-18 UL 248-15 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Low-Voltage Fuses - Part 15: Class T Fuses 1 General NOTE Thi

34、s Part is intended 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 Cla

35、uses not shown 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 UL 248-1. 1.1 Scope This Part applies to Class T fuses rated 1200 A or less and 300 or 600 V ac. DC ratings are optional. 4 Classication Class T fuses are non-rene

36、wable and current limiting with an interrupting rating of 200,000 A. Each of the voltage ratings, 300 and 600 V ac, is divided into eight body sizes. The maximum current rating I n for each size is specied in this Part. Time-delay ratings are optional. 5 Characteristics 5.2 Voltage rating For AC, th

37、e rating shall be 300 V ac or 600 V ac in accordance with dimensions shown in Figures A and B. The DC voltage rating may be different from the AC rating. 5.3 Current rating Refer to Figures A and B for range of current ratings in each body size for each voltage rating. 5.5 Interrupting rating For AC

38、 200,000 A For DC, the preferred ratings are 10,000, 20,000, 50,000, 100,000, 150,000, or 200,000 A MARCH 9, 2018 NMX-J-009/248/15-ANCE CAN/CSA-C22.2 NO. 248.15-18 UL 248-15 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 5.6 Peak let throu

39、gh current and clearing I 2 t characteristics Maximum values of peak let-through current and clearing I 2 t for 300 V ac fuses are given in Table A and for 600 V ac fuses are given in Table B. Table A Maximum peak let-through current and clearing I 2 t for 300 V ac Class T fuses Current rating I n ,

40、A Between threshold and 50 KA At 100 kA At 200 kA 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 1 800 400 3 1300 600 6 2000 1000 10 3000 1500 15 4000 2000 20 4500 250

41、0 25 5500 2700 30 5,000 3,500 7000 3500 9,000 3500 35 7000 6000 40 7200 8500 45 7600 9000 50 8000 11,000 60 7,000 15,000 9000 15,000 12,000 15,000 70 10,000 25,000 80 10,700 30,000 90 11,600 38,000 100 9,000 40,000 12,000 40,000 15,000 40,000 110 12,000 50,000 125 13,000 75,000 150 14,000 88,000 175

42、 15,000 115,000 200 13,000 150,000 16,000 150,000 20,000 150,000 225 21,000 175,000 250 22,000 225,000 300 24,000 300,000 350 27,000 400,000 400 22,000 550,000 28,000 550,000 35,000 550,000 450 32,000 600,000 500 37,000 800,000 600 29,000 1,000,000 37,000 1,000,000 46,000 1,000,000 700 45,000 1,250,

43、000 800 37,000 1,500,000 50,000 1,500,000 65,000 1,500,000 1000 65,000 3,500,000 1200 50,000 3,500,000 65,000 3,500,000 80,000 4,000,000 MARCH 9, 2018 NMX-J-009/248/15-ANCE CAN/CSA-C22.2 NO. 248.15-18 UL 248-15 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT

44、PERMISSION FROM UL Table B Maximum peak let-through current and clearing I 2 t for 600 V ac Class T fuses Current rating I n ,A Between threshold and 50 KA At 100 kA At 200 kA Peak let- through current, A I 2 t, ampere- squared seconds Peak let- through current, A I 2 t, ampere- squared seconds Peak

45、 let- through current, A I 2 t, ampere- squared seconds 1 1000 800 3 1500 1200 6 2300 2000 10 3300 3000 15 4000 4000 20 5000 5000 25 6000 5500 30 6,000 7,000 7500 7000 12,000 7000 35 7500 12,000 40 8000 17,000 45 8500 18,000 50 9000 22,000 60 8,000 30,000 10,000 30,000 16,000 30,000 70 11,500 50,000

46、 80 12,500 60,000 90 13,500 75,000 100 12,000 60,000 14,000 80,000 20,000 80,000 110 14,500 100,000 125 15,500 150,000 150 17,000 175,000 175 18,500 225,000 200 16,000 200,000 20,000 300,000 30,000 300,000 225 22,500 350,000 250 24,000 450,000 300 26,000 600,000 350 29,000 800,000 400 25,000 1,000,0

47、00 30,000 1,100,000 45,000 1,100,000 450 36,000 1,500,000 500 42,000 2,000,000 600 35,000 2,500,000 45,000 2,500,000 70,000 2,500,000 700 50,000 3,500,000 800 50,000 4,000,000 55,000 4,000,000 75,000 4,000,000 1000 65,000 8,000,000 1200 55,500 10,000,000 70,000 10,000,000 88,000 10,000,000 7 Constru

48、ction 7.1 Dimensions Fuse dimensions are shown in Figures A and B. This is generated text for gtxt. MARCH 9, 2018 NMX-J-009/248/15-ANCE CAN/CSA-C22.2 NO. 248.15-18 UL 248-15 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Figure A Dimension

49、s of ferrule type Class T fuses in mm (in) a MARCH 9, 2018 NMX-J-009/248/15-ANCE CAN/CSA-C22.2 NO. 248.15-18 UL 248-15 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Rating Overall length of fuse Length of ferrule Outside diameter of ferrule Thickness of rejection feature Width of rejection feature b Diameter of rejection feature b Volts Current I n , A A a B a C a K a L a M