1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 248-9 Low-Voltage Fuses Part 9: Class K 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 9: Class K Fuses, UL 248-9 Second Edition, Dated August 1, 2000 Summary of Topics This revision of ANSI/UL 248-9 is being issued to reaffirm approval as an American National Standard
3、. 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 any fo
4、rm 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 any purpose. I
5、n 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 has been advi
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8、raphs, 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that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS
9、notice. MARCH 24, 2015 UL 248-9 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 24, 2015 UL 248-9 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Low
10、-Voltage Fuses Part 9: Class K Fuses August 1, 2000 (Title Page Reprinted: March 24, 2015) Canadian Standards Association CAN/CSA-C22.2 No. 248.9-00 Second Edition Approved by Underwriters Laboratories Inc. UL 248-9 Second Edition ANSI/UL 248-9-2005 (R2015) National Association of Standardization an
11、d Certication of the Electrical Sector NMX-J-009/248/9-2000-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 Certication (AN
12、CE), 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 processing according
13、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 bearing the sam
14、e date of issue as the CSA Group and UL pages. Copyright 2005 ANCE Rights reserved in favor of ANCE ISBN 1-55324-242-4 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. Copyright 2015 Unde
15、rwriters 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 10 5.6 Peak let-th
16、rough current and clearing I 2 t characteristics 10 6 Marking .11 6.1 Marking of fuses 11 7 Construction .11 7.1 Dimensions .11 8 Tests .14 8.2 Verication of temperature rise and current-carrying capacity .14 8.3 Verication of overload operation 14 8.4 Verication of operation at rated voltage .15 8.
17、5 Verication of peak let-through current and clearing I 2 t characteristics .15 9 Special Tests 15 9.1 General 15 9.2 Verication of low melting point P ( D for time delay) characteristic .16 AUGUST 11, 2005 NMX-J-009/248/9-2000-ANCE CAN/CSA-C22.2 NO. 248.9-00 UL 248-9 3UL COPYRIGHTED MATERIAL NOT AU
18、THORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Preface This is the common UL, CSA, and ANCE Standard for Low-Voltage Fuses Part 9: Class K Fuses. This is the second edition of CAN/CSA-C22.2 No. 248.9-00 (superseding the rst edition, published in 1996), the second editio
19、n of UL 248-9, and the rst edition of NMX-J-009/248/9-2000-ANCE. This Standard was prepared by a Technical Harmonization Committee comprised of members from Underwriters Laboratories, CSA International, the National Association of Standardization and Certication of the Electrical Sector, the end pro
20、duct manufacturers, and material suppliers. The efforts and support of the members of the Technical Harmonization Committee are gratefully 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
21、., CONANCE, with the collaboration of the fuse manufacturers and users. This Standard was reviewed by the CSA Subcommittee on Fuses and approved by the Technical Committee on Industrial Products under the jurisdiction of the CSA Strategic Steering Committee on the Requirements for Electrical Safety.
22、 This Standard has been approved by the American National Standards Institute (ANSI) as an American National Standard. This ANSI/UL Standard for Safety consists of the Second Edition including revisions through March 24, 2015. The most recent designation of ANSI/UL 248-9 as a Reaffirmed American Nat
23、ional Standard (ANS) occurred on March 24, 2015. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, 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 submi
24、tted 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 1-888-853-3503. Note: Although the intended primary application of this Standard is stated in its Scope, it is important to
25、note that it remains the responsibility of the users of the Standard to judge its suitability for their particular purpose. Level of Harmonization This trinational standard is published as an Identical Standard. An identical standard is a standard that is the same in technical content except for con
26、icts in Codes and Governmental Regulations. Presentation is word for word except for editorial changes. Interpretations The interpretation by the SDO (Standards Development Organization) of an identical standard shall be based on the literal text to determine compliance with the standard in accordan
27、ce with the procedural rules of the SDO. If more than one interpretation of the literal text has been identied, a revision shall be proposed as soon as possible to each of the SDOs to more accurately reect the intent. MARCH 24, 2015 NMX-J-009/248/9-2000-ANCE CAN/CSA-C22.2 NO. 248.9-00 UL 248-9 4UL C
28、OPYRIGHTED 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 Federation (Official Gazette) and is indicated on the cover page. AUGUST 2, 2010 NMX-J-009/248/9-200
29、0-ANCE CAN/CSA-C22.2 NO. 248.9-00 UL 248-9 4AUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 2, 2010 NMX-J-009/248/9-2000-ANCE CAN/CSA-C22.2 NO. 248.9-00 UL 248-9 4B No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTH
30、ER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CSA Effective Date The effective date for CSA will be announced through CSA Informs or CSA Certication Notice. UL Effective Date This edition of the standard is now in effect. AUGUST 11, 2005 NMX-J-009/248/9-2000-ANCE CAN/CSA-C22.2 NO. 248.9
31、-00 UL 248-9 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL This page intentionally left blank. AUGUST 11, 2005 NMX-J-009/248/9-2000-ANCE CAN/CSA-C22.2 NO. 248.9-00 UL 248-9 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION
32、OR DISTRIBUTION WITHOUT PERMISSION FROM UL This page intentionally left blank. AUGUST 11, 2005 NMX-J-009/248/9-2000-ANCE CAN/CSA-C22.2 NO. 248.9-00 UL 248-9 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL This page intentionally left blank.
33、 AUGUST 11, 2005 NMX-J-009/248/9-2000-ANCE CAN/CSA-C22.2 NO. 248.9-00 UL 248-9 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Low-Voltage Fuses Part 9: Class K Fuses 1 General NOTE This Part is intended to be read together with the Standar
34、d for Low-Voltage Fuses Part 1: General Requirements, hereafter referred to as Part 1. The numbering of the Clauses in this Part correspond 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-Volt
35、age Fuses Part 1: General Requirements, NMX-J-009/248/9-2000-ANCE CAN/CSA C22.2 No. 248.1 UL 248-1. 1.1 Scope This Part applies to Class K fuses rated 600 A or less and either 250 or 600 V ac. DC ratings are optional. 4 Classication Class K fuses are non-renewable, with interrupting ratings of 50,00
36、0, 100,000, or 200,000 A. Class K fuses are divided into sub-classes K-1, K-5, and K-9 which are physically interchangeable with each other (and Class H fuses) for the same current and voltage ratings. Each sub-class has specied limits of peak let-through current and clearing I 2 t characteristics.
37、K-1 has the lowest limits (most current-limiting), K-5 higher, and K-9 highest. Each of the voltage ratings, 250 and 600 V ac, is divided into six body sizes. The maximum current rating, I n , for each size is specied in this Part. Time-delay ratings are optional. In Canada, 250V ac fuses rated 15 6
38、0 A shall have a low melting point P ( D for time delay) characteristic. See sub-clauses 6.1 and 9.2. 5 Characteristics 5.2 Voltage rating For AC, the rating shall be 250 or 600 V ac in accordance with dimensions shown in Figure A. The DC voltage rating may be different from the AC rating. 5.3 Curre
39、nt rating Refer to Figures A and B for range of current ratings in each body size for each voltage rating. AUGUST 11, 2005 NMX-J-009/248/9-2000-ANCE CAN/CSA-C22.2 NO. 248.9-00 UL 248-9 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 5.5 Int
40、errupting rating For AC 50,000, 100,000, or 200,000 A For DC, the preferred ratings are 10,000, 20,000, 50,000, 100,000, 150,000, or 200,000 A. 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 250 and 600 V ac, Class K-
41、1, Class K-5, and Class K-9 fuses are given in Tables A and B. Table A Maximum peak let-through current and clearing I 2 t for 250 and 600 V ac Class K fuses at 50 and 100 kA Class Current rating I n ,A Peak let-through current, AI 2 t, ampere-squared seconds K-1 0 30 10,000 10,000 31 60 12,000 40,0
42、00 61 100 16,000 100,000 101 200 22,000 400,000 201 400 35,000 1,200,000 401 600 50,000 3,000,000 K-5 0 30 11,000 50,000 31 60 21,000 200,000 61 100 25,000 500,000 101 200 40,000 1,600,000 201 400 60,000 5,000,000 401 600 80,000 10,000,000 K-9 0 30 14,000 50,000 31 60 28,000 250,000 61 100 35,000 65
43、0,000 101 200 60,000 3,500,000 201 400 80,000 15,000,000 401 600 130,000 40,000,000 AUGUST 11, 2005 NMX-J-009/248/9-2000-ANCE CAN/CSA-C22.2 NO. 248.9-00 UL 248-9 10UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Table B Maximum peak let-thro
44、ugh current and clearing I 2 t for 250 and 600 V ac Class K fuses at 200 kA Class Current rating I n ,A Peak let-through current, AI 2 t, ampere-squared seconds K-1 0 30 12,000 11,000 31 60 16,000 50,000 61 100 20,000 100,000 101 200 30,000 400,000 201 400 50,000 1,600,000 401 600 70,000 4,000,000 K
45、-5 0 30 14,000 50,000 31 60 26,000 200,000 61 100 32,000 500,000 101 200 50,000 2,000,000 201 400 75,000 6,000,000 401 600 100,000 12,000,000 AUGUST 11, 2005 NMX-J-009/248/9-2000-ANCE CAN/CSA-C22.2 NO. 248.9-00 UL 248-9 10A Table B Maximum peak let-through current and clearing I 2 t for 250 and 600
46、V ac Class K fuses at 200 kA Continued on Next PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 11, 2005 NMX-J-009/248/9-2000-ANCE CAN/CSA-C22.2 NO. 248.9-00 UL 248-9 10B No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED F
47、OR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Table B Maximum peak let-through current and clearing I 2 t for 250 and 600 V ac Class K fuses at 200 kA Continued Class Current rating I n ,A Peak let-through current, AI 2 t, ampere-squared seconds K-9 0 30 14,000 50,000 31 60 28,0
48、00 250,000 61 100 35,000 650,000 101 200 60,000 3,500,000 201 400 80,000 15,000,000 401 600 130,000 40,000,000 6 Marking 6.1 Marking of fuses In addition to the requirements in Part 1: Fuses with a low melting point characteristic for Canada, shall be marked with a P , or with a D for time delay. g) The fuse shall not be marked Current Limiting. 7 Construction 7.1 Dimensions Fuse dimensions are shown in Figures A and B. This is generated text for gtxt. AUGUST 11, 2005 NMX-J-009/248/9-2000-ANCE CSA C22.2 NO. 248.9-00 UL 248-9 11UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRO
