UL 248-2-2000 UL Standard for Safety Low-Voltage Fuses C Part 2 Class C Fuses (Second Edition Reprint with Revisions Through and Including November 20 2014)《低压熔断器 第2部分 C级熔断器》.pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 248-2 Low-Voltage Fuses Part 2: Class C 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 2: Class C Fuses, UL 248-2 Second Edition, Dated August 1, 2000 Summary of Topics This revision of ANSI/UL 248-2 is being issued to reaffirm approval as an American National Standard

3、. 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 November 20, 2014 will not be jointly issued by U

4、L, CSA, and ANCE as these revision pages only address UL 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 revisions are are substantially in accordance with Proposal(s) on this subject date

5、d September 26, 2014. 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 warran

6、ty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or tness for any 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, o

7、r 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 form o

8、f 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 purchaser

9、is storing an electronic Standard on the purchasers computer system. The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, gures, and/or other elements of the Standard having future effective dates as indicated in the preface. The prior text for requirem

10、ents that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. NOVEMBER 20, 2014 UL 248-2 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL NOVEMBER 20

11、, 2014 UL 248-2 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Low-Voltage Fuses Part 2: Class C Fuses August 1, 2000 (Title Page Reprinted: November 20, 2014) Canadian Standards Association CAN/CSA-C22.2 No. 248.2-0

12、0 Second Edition Approved by Underwriters Laboratories Inc. UL 248-2 Second Edition ANSI/UL 248-2-2005 (R2014) National Association of Standardization and Certication of the Electrical Sector NMX-J-009/248/2-2000-ANCE First EditionUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DI

13、STRIBUTION 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 Underwriters Laboratories Inc. (UL). Comments or proposals for revisions on

14、 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 and UL will issue revisions to this standard by means of a new editio

15、n 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 2005 ANCE Rights reserved in favor of ANCE ISBN 1-55324-228-9 Copyright 2000 CSA Group All

16、 rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher. Copyright 2014 Underwriters Laboratories Inc.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS Prefa

17、ce .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 Peak let-through current and clearing I 2 t characteristics 10 7 Construction .10 7.1 Dimensions .10 8 Tests .13 8.1 General 13 8.2 Verication of temperature

18、rise and current-carrying capacity .13 8.3 Verication of overload operation 14 8.4 Verication of operation at rated voltage .14 8.5 Verication of peak let-through current and clearing I 2 t characteristics .15 AUGUST 11, 2005 NMX-J-009/248/2-2000-ANCE CAN/CSA-C22.2 NO. 248.2-00 UL 248-2 3UL COPYRIGH

19、TED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Preface This is the common UL, CSA, and ANCE Standard for Low-Voltage Fuses Part 2: Class C Fuses. This is the second edition of CAN/CSA-C22.2 No. 248.2-00 (superseding the rst edition, published in 1996)

20、, the second edition of UL 248-2, and the rst edition of NMX-J-009/248/2-2000-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

21、Sector, the end product 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

22、 y Certicacion, A.C., 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

23、 Electrical Safety. 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 November 20, 2014. The most recent designation of ANSI/UL 248-2 as a R

24、eaffirmed American National Standard (ANS) occurred on November 18, 2014. 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.

25、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 1-888-853-3503. Note: Although the intended primary application of this Standard is stated in its S

26、cope, it is important 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 trinational standard is published as an Identical Standard. An identical standard is a standard that is the same in technic

27、al content except for conicts 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

28、 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 as soon as possible to each of the SDOs to more accurately reect the intent. NOVEMBER 20, 2014 NMX-J-009/248/2-2000-ANCE CAN/CSA-C22.2

29、 NO. 248.2-00 UL 248-2 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 Federation (Official Gazette) and is indicated on the cover page. AUGUST

30、 2, 2010 NMX-J-009/248/2-2000-ANCE CAN/CSA-C22.2 NO. 248.2-00 UL 248-2 4AUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 2, 2010 NMX-J-009/248/2-2000-ANCE CAN/CSA-C22.2 NO. 248.2-00 UL 248-2 4B No Text on This PageUL COPYRIGHTED MATER

31、IAL NOT AUTHORIZED FOR FURTHER 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-009/248/2-2000-

32、ANCE CAN/CSA-C22.2 NO. 248.2-00 UL 248-2 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL This page intentionally left blank. AUGUST 11, 2005 NMX-J-009/248/2-2000-ANCE CAN/CSA-C22.2 NO. 248.2-00 UL 248-2 6UL COPYRIGHTED MATERIAL NOT AUTHORIZ

33、ED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL This page intentionally left blank. AUGUST 11, 2005 NMX-J-009/248/2-2000-ANCE CAN/CSA-C22.2 NO. 248.2-00 UL 248-2 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL This pa

34、ge intentionally left blank. AUGUST 11, 2005 NMX-J-009/248/2-2000-ANCE CAN/CSA-C22.2 NO. 248.2-00 UL 248-2 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Low-Voltage Fuses Part 2: Class C Fuses 1 General NOTE This Part is intended to be re

35、ad 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 shown below, refer

36、 to the Standard for Low-Voltage Fuses Part 1: General Requirements, NMX-J-009/248/2-2000-ANCE CAN/CSA C22.2 No. 248.1 UL 248-1. 1.1 Scope This Part applies to Class C fuses rated 1200 A or less and 600 V ac. DC ratings are optional. 4 Classication Class C fuses are non-renewable with an interruptin

37、g rating of 200,000 A. Class C fuses are divided into eight body sizes. The maximum current rating, I n , for each size is specied in this Part. 5 Characteristics 5.2 Voltage rating For AC, the rating shall be 600 V ac. The DC voltage rating may be different from the AC rating. 5.3 Current rating Re

38、fer to Figure A for range of current ratings in each body size. 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-009/248/2-2000-ANCE CAN/CSA-C22.2 NO. 248.2-00 UL 248-2 9UL COPYRIGHTED MATERIAL N

39、OT 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. Table A Maximum peak let-through current and clearing I 2 t for Class

40、C fuses at 200 kA Current rating I n , A Peak let-through current, A I 2 t, ampere-squared seconds 0 30 12,000 15,000 31 60 20,000 60,000 61 100 30,000 200,000 101 200 40,000 750,000 201 400 70,000 4,000,000 401 600 100,000 10,000,000 601 800 115,000 25,000,000 801 1200 125,000 40,000,000 7 Construc

41、tion 7.1 Dimensions Fuse dimensions are shown in Figure A. This is generated text for gtxt. Figure A Dimensions of Class C fuses in mm 0 100 A AUGUST 1, 2000 NMX-J-009/248/2-2000-ANCE CSA C22.2 NO. 248.2-00 UL 248-2 10UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WI

42、THOUT PERMISSION FROM UL 101 200 A 201 800 A AUGUST 1, 2000 NMX-J-009/248/2-2000-ANCE CSA C22.2 NO. 248.2-00 UL 248-2 11UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 801 1200 A Current rating I n ,A 03 0 3 16 0 6 11 0 0 1 0 1 200 201 400 4

43、01 600 601 800 801 1200 Maximum overall length, A 86 91 111 138 212 212 212 200 Maximum outside diameter, C 24 27 37 42 66 84 84 102 Maximum blade width, D 9.2 13.0 20.0 20.0 26.0 26.0 39.0 64.0 Thickness of blade, E min. 0.8 1.2 2.4 3.2 4.8 6.3 9.5 9.5 max. 1.5 1.6 3.2 4.0 6.6 9.6 11.1 12.7 Distanc

44、e between mounting centers, F 73 73 94 111 133 133 133 149 Width of slot, H a 5.5 5.5 8.7 8.7 9.5 11.0 10.3 14.3 Minimum length of slot, I 7.0 7.0 9.5 11.0 11.0 11.0 12.5 16.5 Maximum distance from top of fuse to base of blade, P 25.5 28.0 38.5 Distance between centers of in-line slots, Q 25.4 25.4

45、25.4 31.8 Maximum body length over projections At right angle to blade, J 57 58 70 77 83 89 89 89 Overall, S a 82 95 101 101 95 a It is permissible to slot the xing holes of fuse ratings 0 200 amperes. AUGUST 1, 2000 NMX-J-009/248/2-2000-ANCE CSA C22.2 NO. 248.2-00 UL 248-2 12UL COPYRIGHTED MATERIAL

46、 NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 8 Tests 8.1 General 8.1.1 Types of tests Table 1 Number of fuses to be tested Test Current rating I n ,A 0 100 101 600 601 1200 8.3 Verication of overload operation b) t max (1.6 I n ) 321 8.2 Verication of temperatu

47、re rise and current-carrying capacity 8.2.3 Test method Fuses rated 0 600 A 1.0 I n Temperature rise 1.1 I n Current-carrying capacity, I nf Fuses rated 601 1200 A 1.1 I n Temperature rise and current-carrying capacity, I nf 8.2.3.1 Fuses rated 600 A or less In addition to the requirements in Part 1

48、: At the conclusion of the temperature rise test, the test current shall be increased without interruption to 1.1 I n for a period of not less than 15 min for fuses rated02 0 0 A and not less than 30 min for fuses rated 201 600 A. Temperature is not to be monitored during this time. AUGUST 1, 2000 N

49、MX-J-009/248/2-2000-ANCE CSA C22.2 NO. 248.2-00 UL 248-2 13UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 8.2.4 Acceptability of test results In addition to the requirements in Part 1: The maximum temperature rise shall not exceed the following: Co