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 FusesUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZE
2、D 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 Second Edition, Dated August 1, 2000 Summary of Topics This revision of ANSI/UL 248-15 is being issued to reaffirm approval as an American National Sta
3、ndard. No changes in requirements are involved. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in a
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8、paragraphs, sections, tables, gures, 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that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREM
9、ENTS notice. MARCH 25, 2015 UL 248-15 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 25, 2015 UL 248-15 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM
10、 UL LOW-VOLTAGE FUSES PART 15: CLASS T FUSES August 1, 2000 (Title Page Reprinted: March 25, 2015) Canadian Standards Association CAN/CSA-C22.2 No. 248.15-00 Second Edition Approved by Underwriters Laboratories Inc. UL 248-15 Second Edition ANSI/UL 248-15-2005 (R2015) National Association of Standar
11、dization and Certication of the Electrical Sector NMX-J-009/248/15-2000-ANCE First EditionUL 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 Cer
12、tication (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 processin
13、g 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 standard bea
14、ring the same date of issue as the CSA Group and UL pages. Copyright 2005 ANCE Rights reserved in favor of ANCE ISBN 1-55324-254-8 Copyright 2000 CSA Group All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher. Copyrig
15、ht 2015 Underwriters Laboratories Inc.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS Preface .4 1 General 9 1.1 Scope .9 4 Classication .9 5 Characteristics 9 5.2 Voltage rating 9 5.3 Current rating 9 5.5 Interrupting rating .9 5.6
16、 Peak let through current and clearing I 2 t characteristics 10 7 Construction .12 7.1 Dimensions .12 8 Tests .17 8.2 Verication of temperature rise and current-carrying capacity .17 8.3 Verication of overload operation 18 8.4 Verication of operation at rated voltage .18 8.5 Verication of peak let-t
17、hrough current and clearing I 2 t characteristics .19 AUGUST 11, 2005 NMX-J-009/248/15-2000-ANCE CAN/CSA-C22.2 NO. 248.15-00 UL 248-15 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Preface This is the common UL, CSA, and ANCE Standard for
18、 Low-Voltage Fuses Part 15: Class T Fuses. This is the second edition of CAN/CSA-C22.2 No. 248.15-00 (superseding the rst edition, published in 1994), the second edition of UL 248-15, and the rst edition of NMX-J-009/248/15-2000-ANCE. This Standard was prepared by a Technical Harmonization Committee
19、 comprised of members from Underwriters Laboratories, CSA International, the National Association of Standardization and Certication of the Electrical Sector, the end product manufacturers, and material suppliers. The efforts and support of the members of the Technical Harmonization Committee are gr
20、atefully acknowledged. The present Mexican Standard was developed by the TC 32 Fuses 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 Subcommittee on Fuse
21、s and approved by the Technical Committee on Industrial Products under the jurisdiction of the CSA Strategic Steering Committee on the Requirements for Electrical Safety. This Standard has been approved by the American National Standards Institute (ANSI) as an American National Standard. This ANSI/U
22、L Standard for Safety consists of the Second Edition including revisions through March 25, 2015. The most recent designation of ANSI/UL 248-15 as a Reaffirmed American National Standard (ANS) occurred on March 25, 2015. ANSI approval for a standard does not include the Cover Page, Transmittal Pages,
23、 Title Page (front 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 http:/. To purchase UL Standards,
24、 visit Comm 2000 at http:/m- or call toll-free 1-888-853-3503. 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 their purpose. Level of Harmoni
25、zation This trinational standard is published as an Identical Standard. An identical standard is a standard that is the same in technical content except for conicts in Codes and Governmental Regulations. Presentation is word for word except for editorial changes. Interpretations The interpretation b
26、y the SDO (Standards Development Organization) of an identical standard shall be based 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 identied, a revision shall be proposed
27、 as soon as possible to each of the SDOs to more accurately reect the intent. MARCH 25, 2015 NMX-J-009/248/15-2000-ANCE CAN/CSA-C22.2 NO. 248.15-00 UL 248-15 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL ANCE Effective Date The effective
28、date for ANCE will be announced through the Diario Ocial de la Federation (Official Gazette) and is indicated on the cover page. AUGUST 2, 2010 NMX-J-009/248/15-2000-ANCE CAN/CSA-C22.2 NO. 248.15-00 UL 248-15 4AUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT P
29、ERMISSION FROM UL AUGUST 2, 2010 NMX-J-009/248/15-2000-ANCE CAN/CSA-C22.2 NO. 248.15-00 UL 248-15 4B No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CSA Effective Date The effective date for CSA will be announced through
30、either a CSA Informs or CSA Certication Notice. UL Effective Date This edition of the standard is now in effect. AUGUST 11, 2005 NMX-J-009/248/15-2000-ANCE CAN/CSA-C22.2 NO. 248.15-00 UL 248-15 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM U
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33、THORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Low-Voltage Fuses Part 15: Class T Fuses 1 General NOTE This 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 C
34、lauses 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: General Requirements, NMX-J-009/248/15-2000-ANCE CAN/CSA C22.2 No. 248.1 UL 248-1. 1.1 Sco
35、pe 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-renewable and current limiting with an interrupting rating of 200,000 A. Each of the voltage ratins, 300 and 600 V ac, is divided into eight body sizes. The m
36、aximum 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, the 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
37、.3 Current rating Refer to Figure A for range of current ratings in each body size for each voltage rating. 5.5 Interrupting rating For AC 200,000 A For DC, the preferred ratings are 10,000, 20,000, 50,000, 100,000, 150,000, or 200,000 A AUGUST 11, 2005 NMX-J-009/248/15-2000-ANCE CAN/CSA-C22.2 NO. 2
38、48.15-00 UL 248-15 9UL 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 for 300 V ac fuses are given in Table A and for
39、 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 ,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- s
40、quared 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 2500 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 10,00
41、0 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 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
42、,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 1,250,000 800 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 AUGUST 1, 2000 NMX
43、-J-009/248/15-2000-ANCE CSA C22.2 NO. 248.15-00 UL 248-15 10UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT 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
44、 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 1000 800 3 1500 1200 6 2300 2000 10 3300 3000 15 4000 4000 20 5000 5000 25 6000 5500 30 6,000
45、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 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
46、,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 1,000,000 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 3,500,0
47、00 800 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 AUGUST 11, 2005 NMX-J-009/248/15-2000-ANCE CSA C22.2 NO. 248.15-00 UL 248-15 11UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WI
48、THOUT PERMISSION FROM UL 7 Construction 7.1 Dimensions Fuse dimensions are shown in Figures A and B. This is generated text for gtxt. AUGUST 1, 2000 NMX-J-009/248/15-2000-ANCE CSA C22.2 NO. 248.15-00 UL 248-15 12UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT
49、PERMISSION FROM UL Figure A Dimensions of ferrule type Class T fuses in mm (in) a AUGUST 1, 2000 NMX-J-009/248/15-2000-ANCE CSA C22.2 NO. 248.15-00 UL 248-15 13UL 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 r
