ANSI UL 248-13-2000 UL Standard for Safety Low-Voltage Fuses C Part 13 Semiconductor Fuses (Second Edition Reprint with Revisions Through and Including March 24 2015).pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 248-13 Low-Voltage Fuses Part 13: Semiconductor FusesUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUT

2、HORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Low-Voltage Fuses Part 13: Semiconductor Fuses, UL 248-13 Second Edition, Dated August 1, 2000 Summary of Topics This revision of ANSI/UL 248-13 is being issued to reaffirm approval as an American

3、National Standard. 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 tran

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8、t 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 requirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSE

9、DED REQUIREMENTS notice. MARCH 24, 2015 UL 248-13 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 24, 2015 UL 248-13 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PER

10、MISSION FROM UL Low-Voltage Fuses Part 13: Semiconductor Fuses August 1, 2000 (Title Page Reprinted: March 24, 2015) Canadian Standards Association CAN/CSA-C22.2 No. 248.13-00 Second Edition Approved by Underwriters Laboratories Inc. UL 248-13 Second Edition ANSI/UL 248-13-2005 (R2015) National Asso

11、ciation of Standardization and Certication of the Electrical Sector NMX-J-009/248/13-2000-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 Stand

12、ardization 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 on

13、ly 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 edition or revised or additional pages bearing their date of issue. ANCE will incorporate the same revisions into a new edition o

14、f 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 1-55324-250-5 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

15、publisher. Copyright 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 2 Denitions 9 2.2 General Terms .9 4 Classication 10 5 Characteristics .10 5.2 Voltage ratin

16、g .10 5.5 Interrupting rating 10 5.6 Peak let-through current and clearing I 2 t characteristics 10 6 Marking .10 6.1 Marking of fuses 10 6.2 Marking symbols 11 7 Construction .11 7.1 Dimensions .11 8 Tests .11 8.2 Verication of temperature rise and current-carrying capacity .11 8.3 Verication of ov

17、erload operation 12 8.4 Verication of operation at rated voltage .12 8.5 Verication of peak let-through current and clearing I 2 t characteristics .13 AUGUST 11, 2005 NMX-J-009/248/13-2000-ANCE CAN/CSA-C22.2 NO. 248.13-00 UL 248-13 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR

18、DISTRIBUTION WITHOUT PERMISSION FROM UL Preface This is the common UL, CSA, and ANCE Standard for Low-Voltage Fuses Part 13: Semiconductor Fuses. This is the second edition of CAN/CSA-C22.2 No. 248.13-00 (superseding the rst edition, published in 1996), the second edition of UL 248-13, and the rst e

19、dition of NMX-J-009/248/13-2000- 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 product manufacturers, and ma

20、terial 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., CONANCE, with the colla

21、boration 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. This Standard has been ap

22、proved 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 248-13 as a Reaffirmed American National Standard (ANS) occu

23、rred 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 submitted via a Proposal Reque

24、st 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 note that it remains the

25、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 conicts in Codes and Governm

26、ental 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 accordance with the procedural ru

27、les 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-009/248/13-2000-ANCE CAN/CSA-C22.2 NO. 248.13-00 UL 248-13 4UL COPYRIGHTED MATERIAL NO

28、T 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-009/248/13-2000-ANCE CAN/CSA-C22.2

29、NO. 248.13-00 UL 248-13 4AUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 2, 2010 NMX-J-009/248/13-2000-ANCE CAN/CSA-C22.2 NO. 248.13-00 UL 248-13 4B No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION

30、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-009/248/13-2000-ANCE CAN/CSA-C22.2 NO. 248.13-00 UL 248-13

31、5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL This page intentionally left blank. AUGUST 11, 2005 NMX-J-009/248/13-2000-ANCE CAN/CSA-C22.2 NO. 248.13-00 UL 248-13 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIB

32、UTION WITHOUT PERMISSION FROM UL This page intentionally left blank. AUGUST 11, 2005 NMX-J-009/248/13-2000-ANCE CAN/CSA-C22.2 NO. 248.13-00 UL 248-13 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL This page intentionally left blank. AUGUST

33、 11, 2005 NMX-J-009/248/13-2000-ANCE CAN/CSA-C22.2 NO. 248.13-00 UL 248-13 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Low-Voltage Fuses Part 13: Semiconductor Fuses 1 General NOTE This Part is intended to be read together with the Stan

34、dard 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-V

35、oltage Fuses Part 1: General Requirements, NMX-J-009/248/13-2000-ANCE CAN/CSA C22.2 No. 248.1 UL 248-1. 1.1 Scope This Part applies to semiconductor fuses rated 2000 V ac or less. DC ratings are optional. Note: The Canadian Electrical Code, Part I, denes low voltage as any voltage from 31 to 750 V i

36、nclusive and high voltage as any voltage above 750 V. The National Electrical Code, NFPA 70-1996 , Section 710-2 denes high voltage as more than 600 V, nominal. 2 Denitions 2.2 General Terms 2.2.15 Semiconductor fuse A fuse, letter designation R, intended only for protection or isolation of semicond

37、uctor devices such as SCRs, diodes, and the like, and not branch-circuit protection. 2.2.15.1 g Fuse A fuse capable of interrupting under specied conditions all currents which cause melting of the fuse-element up to its interrupting rating. 2.2.15.2 a Fuse A fuse capable of interrupting, under speci

38、ed conditions, all currents between the lowest current specied by the manufacturer and its interrupting rating. AUGUST 11, 2005 NMX-J-009/248/13-2000-ANCE CAN/CSA-C22.2 NO. 248.13-00 UL 248-13 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL

39、 4 Classication Semiconductor fuses are non-renewable. They shall provide short-circuit protection and may provide overload protection. gR Full-range, overload and short-circuit protection. aR Partial-range, short-circuit protection. 5 Characteristics 5.2 Voltage rating For AC, the rating shall be 2

40、000 V ac or less. The DC voltage rating may be different from the AC rating. 5.5 Interrupting rating For AC, the preferred ratings are 25,000, 50,000, 100,000, or 200,000 A. For DC, the preferred ratings are 20,000, 50,000, 100,000, 150,000, or 200,000 A. 5.6 Peak let-through current and clearing I

41、2 t characteristics Maximum values of peak let-through current and clearing I 2 t are provided by the manufacturer. See Clause 8.5.3. 6 Marking 6.1 Marking of fuses In addition to the marking requirements in Part 1: A semiconductor fuse shall be marked with: e) the fuse class or classication (See Cl

42、ause 6.2): gR (Full-range); or aR (Partial-range); and g) the marking Current Limiting may be applied if the fuse complies with the threshold ratio test. AUGUST 1, 2000 NMX-J-009/248/13-2000-ANCE CSA C22.2 NO. 248.13-00 UL 248-13 10UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR D

43、ISTRIBUTION WITHOUT PERMISSION FROM UL 6.2 Marking symbols The preferred symbol for class or classication is This symbol is optional. 7 Construction 7.1 Dimensions The fuse dimensions are not specied, but shall be in accordance with the manufacturers specications. This specication shall dene the env

44、elope shape including length, height, width or diameter, and mounting details. 8 Tests 8.2 Verication of temperature rise and current-carrying capacity 8.2.3 Test method 1.0 I n Temperature rise and current-carrying capacity 8.2.4 Acceptability of test results In addition to the requirements in Part

45、 1: The maximum temperature rise shall not exceed the following: Contacts 130C AUGUST 11, 2005 NMX-J-009/248/13-2000-ANCE CSA C22.2 NO. 248.13-00 UL 248-13 11UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 8.3 Verication of overload operatio

46、n For gR fuses, the overload operation point and maximum opening time shall be specied by the manufacturer and shall be selected from the following values: 135, 150, 160, 175, 200, or 250 percent of rating. For fuses rated less than 600 A, two samples are to be tested. For fuses rated 600 A and grea

47、ter, one sample is to be tested. 8.4 Verication of operation at rated voltage AC Part 1, Table 5 Test 1 High current specied by manufacturer Test 2 Maximum energy Test 3 Threshold ratio. Required for fuses marked Current Limiting. The maximum threshold ratio shall be specied by the manufacturer. Tes

48、t 5 Test to be conducted at a low current specied by manufacturer. Shall not be greater than 800 percent of the fuse current rating, I n , test current tolerance +0% 10%. Notes: a) peak let-through current and clearing I 2 t recorded during Tests 1 and 2; b) test circuit frequency shall be recorded;

49、 and c) the maximum peak arc voltage is specied by the manufacturer. For DC Part 1, Table 6 Test 1 High current specied by manufacturer Test 2 Maximum energy Test 5 Test to be conducted at a low current specied by manufacturer. Shall not be greater than 800 percent of rating, I n test current tolerance +0% 10%. AUGUST 11, 2005 NMX-