CAN CSA-C22 2 NO 248 13-2000 Low-Voltage Fuses – Part 13 Semiconductor Fuses (Second Edition General Instruction No 1 August 2000 Update No 2 November 2004 Update No 3 August 2005).pdf

1、Low-Voltage Fuses Part 13: Semiconductor FusesAugust 1, 2000CSA InternationalCSA C22.2 No. 248.13-00Second EditionUnderwriters LaboratoriesInc.UL 248-13Second EditionNational Association ofStandardization andCertification of the ElectricalSectorNMX-J-009/248/13-2000-ANCEFirst EditionCommitment for A

2、mendmentsThis Standard is issued jointly by the National Association of Standardization andCertification of the Electrical Sector (ANCE), CSA International, and UnderwritersLaboratories Incorporated (UL). Amendments to this Standard will be made onlyafter processing according to the Standards writin

3、g procedures by ANCE, CSA,and UL.Revisions of this Standard will be made by issuing revised or additional pagesbearing their date of issue. A UL Standard is current only if it incorporates themost recently adopted revisions, all of which are itemized on the transmittal noticethat accompanies the lat

4、est set of revised requirements.Copyright 2000ANCERights reserved in favorof ANCEISBN 1-55324-250-5Copyright 2000CSA InternationalAll rights reserved. Nopart of this publicationmay be reproduced inany form whatsoeverwithout the priorpermission of thepublisher.ISBN 0-7629-0563-8Copyright 1996,2000Und

5、erwritersLaboratories Inc.Update No. 3CAN/CSA-C22.2 No. 248.13-00August 2005Note: General Instructions for CSA Standards are now called Updates. Please contact CSA Information Products Sales or visit www.ShopCSA.ca for information about the CSA Standards Update Service.Title: Low-Voltage Fuses Part

6、13: Semiconductor Fuses originally published August 2000Revisions issued: Update No. 2 November 2004If you are missing any updates, please contact CSA Information Products Sales or visit www.ShopCSA.ca.The following revisions have been formally approved and are marked by a vertical line in the margi

7、n on the attached replacement pages:Revised Title page, copyright page, Contents, Preface, and Clauses 1, 8.2.4, and 8.4New NoneDeleted Foreword (ANCE) and Foreword (UL)CAN/CSA-C22.2 No. 248.13-00 originally consisted of 14 pages, each dated August 2000. It now consists of the following pages:August

8、 2000 10, 13, and 14November 2004 CoverAugust 2005 19, 11, and 12Update your copy by inserting these revised pages.Keep the pages you remove for reference.Low-Voltage Fuses Part 13: Semiconductor FusesAugust 1, 2000(Title Page Reprinted: August 11, 2005)Canadian StandardsAssociationCAN/CSA-C22.2 No.

9、 248.13-00Second EditionUnderwriters LaboratoriesInc.UL 248-13Second EditionANSI/UL 248-13-2005National Association ofStandardization andCertification of the ElectricalSectorNMX-J-009/248/13-2000-ANCEFirst EditionCommitment for AmendmentsThis Standard is issued jointly by the National Association of

10、 Standardization andCertification of the Electrical Sector (ANCE), CSA International, and UnderwritersLaboratories Incorporated (UL). Amendments to this Standard will be made onlyafter processing according to the Standards writing procedures by ANCE, CSA,and UL.Revisions of this Standard will be mad

11、e by issuing revised or additional pagesbearing their date of issue. A UL Standard is current only if it incorporates themost recently adopted revisions, all of which are itemized on the transmittal noticethat accompanies the latest set of revised requirements.Copyright 2000,2005 ANCERights reserved

12、 in favorof ANCEISBN 1-55324-250-5Copyright 2000Canadian StandardsAssociationAll rights reserved. Nopart of this publicationmay be reproduced inany form whatsoeverwithout the priorpermission of thepublisher.ISBN 0-7629-0563-8Copyright 1996,2005UnderwritersLaboratories Inc.CONTENTSPreface .41 General

13、 91.1 Scope .92 Definitions 92.2 General Terms .94 Classification 105 Characteristics .105.2 Voltage rating .105.5 Interrupting rating 105.6 Peak let-through current and clearing I2t characteristics 106 Marking .106.1 Marking of fuses 106.2 Marking symbols 117 Construction .117.1 Dimensions .118 Tes

14、ts .118.2 Verification of temperature rise and current-carrying capacity .118.3 Verification of overload operation 128.4 Verification of operation at rated voltage .128.5 Verification of peak let-through current and clearing I2t characteristics .13AUGUST 11, 2005 NMX-J-009/248/13-2000-ANCE CAN/CSA-C

15、22.2 NO. 248.13-00 UL 248-13 3PrefaceThis is the common UL, CSA, and ANCE Standard for Low-Voltage Fuses Part 13: SemiconductorFuses. This is the second edition of CAN/CSA-C22.2 No. 248.13-00 (superseding the first edition,published in 1996), the second edition of UL 248-13, and the first edition of

16、 NMX-J-009/248/13-2000-ANCE.This Standard was prepared by a Technical Harmonization Committee comprised of members fromUnderwriters Laboratories, CSA International, the National Association of Standardization andCertification of the Electrical Sector, the end product manufacturers, and material supp

17、liers. The effortsand 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 dela Asociacion de Normalizacion y Certificacion, A.C., CONANCE, with the collaboration of

18、the fusemanufacturers and users.This Standard was reviewed by the CSA Subcommittee on Fuses and approved by the TechnicalCommittee on Industrial Products under the jurisdiction of the CSA Strategic Steering Committee on theRequirements for Electrical Safety.This Standard has been approved by the Ame

19、rican National Standards Institute (ANSI) as an AmericanNational Standard.The most recent designation of ANSI/UL 248-13 as an American National Standard (ANSI) occurred onAugust 1, 2005.This ANSI/UL Standard for Safety, which consists of the Second edition with revisions through August 11,2005, is u

20、nder continuous maintenance, whereby each revision is ANSI approved upon publication.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 StandardsDevelopment System (CSDS)

21、 at http:/.Note: Although the intended primary application of this Standard is stated in its Scope, it is important to note that it remains theresponsibility of the users of the Standard to judge its suitability for their particular purpose.Level of HarmonizationThis trinational standard is publishe

22、d as an Identical Standard. An identical standard is a standard that isthe same in technical content except for conflicts in Codes and Governmental Regulations. Presentationis word for word except for editorial changes.InterpretationsThe interpretation by the SDO (Standards Development Organization)

23、 of an identical standard shall bebased on the literal text to determine compliance with the standard in accordance with the proceduralrules of the SDO. If more than one interpretation of the literal text has been identified, a revision shall beproposed as soon as possible to each of the SDOs to mor

24、e accurately reflect the intent.ANCE Effective DateThe effective date for ANCE will be announced through the Diario Oficial de la Federation (OfficialGazette) and is indicated on the cover page.AUGUST 11, 2005NMX-J-009/248/13-2000-ANCE CAN/CSA-C22.2 NO. 248.13-00 UL 248-134CSA Effective DateThe effe

25、ctive date for CSA will be announced through CSA Informs or CSA Certification Notice.UL Effective DateThis 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 5This page intentionally left blank.AUGUST 11, 2005NMX-J-009/248/13-200

26、0-ANCE CAN/CSA-C22.2 NO. 248.13-00 UL 248-136AUGUST 11, 2005 NMX-J-009/248/13-2000-ANCE CSA C22.2 NO. 248.13-00 UL 248-13 7Foreword (CSA) The Canadian Standards Association (CSA) develops standards under the name Canadian StandardsAssociation, and provides certification and testing under the name CS

27、A International. CSA Internationalprovides certification services for manufacturers who, under license from CSA, wish to use the appropriateregistered CSA Marks on certain products of their manufacture to indicate conformity with CSA Standards. CSA Certification for a number of products is provided

28、in the interest of maintaining agreed-uponstandards of quality, performance, interchangeability and/or safety, as appropriate. Where applicable,certification may form the basis for acceptance by inspection authorities responsible for enforcement ofregulations. Where feasible, programs will be develo

29、ped for additional products for which certification isdesired by producers, consumers, or other interests. In performing its functions in accordance with itsobjectives, CSA does not assume or undertake to discharge any responsibility of the manufacturer or anyother party. The opinions and findings o

30、f the Association represent its professional judgement given withdue consideration to the necessary limitations of practical operation and state of the art at the time theStandard is processed. Products in substantial accord with this Standard but which exhibit a minor difference or a new feature ma

31、ybe deemed to meet the Standard providing the feature or difference is found acceptable utilizingappropriate CSA International Operating Procedures. Products that comply with this Standard shall not becertified if they are found to have additional features which are inconsistent with the intent of t

32、his Standard.Products shall not be certifiable if they are discovered to contravene applicable laws or regulations. Testing techniques, test procedures, and instrumentation frequently must be prescribed by CSAInternational in addition to the technical requirements contained in Standards of CSA. In a

33、ddition tomarkings specified in the Standard, CSA International may require special cautions, markings, andinstructions that are not specified by the Standard. Some tests required by CSA Standards may be inherently hazardous. The Association neither assumesnor accepts any responsibility for any inju

34、ry or damage that may occur during or as the result of tests,wherever performed, whether performed in whole or in part by the manufacturer or the Association, andwhether or not any equipment, facility, or personnel for or in connection with the test is furnished by themanufacturer or the Association

35、. Manufacturers should note that, in the event of the failure of CSA International to resolve an issue arisingfrom the interpretation of requirements, there is an appeal procedure: the complainant should submit thematter, in writing, to the Secretary of the Canadian Standards Association. If this St

36、andard is to be used in obtaining CSA Certification please remember, when making application forcertification, to request all current Amendments, Bulletins, Notices, and Technical Information Letters thatmay be applicable and for which there may be a nominal charge. For such information or for furth

37、erinformation concerning CSA Certification, please address your inquiry to Applications and CustomerService, CSA International, 178 Rexdale Boulevard, Toronto, Ontario, Canada M9W 1R3. This page intentionally left blank.AUGUST 11, 2005NMX-J-009/248/13-2000-ANCE CAN/CSA-C22.2 NO. 248.13-00 UL 248-138

38、Low-Voltage Fuses Part 13: Semiconductor Fuses1 GeneralNOTE This Part is intended to be read together with the Standard for Low-Voltage Fuses Part 1: General Requirements, hereafterreferred to as Part 1. The numbering of the Clauses in this Part correspond to like numbered Clauses in Part 1. The req

39、uirementsof Part 1 apply unless modified by this Part. For Clauses not shown below, refer to the Standard for Low-Voltage Fuses Part 1:General Requirements, NMX-J-009/248/13-2000-ANCE CAN/CSA C22.2 No. 248.1 UL 248-1.1.1 ScopeThis Part applies to semiconductor fuses rated 2000 V ac or less. DC ratin

40、gs are optional.Note: The Canadian Electrical Code, Part I, defines low voltage as any voltage from 31 to 750 V inclusive and high voltage as anyvoltage above 750 V. The National Electrical Code, NFPA 70-1996 , Section 710-2 defines high voltage as more than 600 V,nominal.2 Definitions2.2 General Te

41、rms2.2.15 Semiconductor fuseA fuse, letter designation R, intended only for protection or isolation of semiconductor devices such asSCRs, diodes, and the like, and not branch-circuit protection.2.2.15.1 g FuseA fuse capable of interrupting under specified conditions all currents which cause melting

42、of thefuse-element up to its interrupting rating.2.2.15.2 a FuseA fuse capable of interrupting, under specified conditions, all currents between the lowest current specifiedby 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 248-1

43、3 94 ClassificationSemiconductor fuses are non-renewable. They shall provide short-circuit protection and may provideoverload protection.gR Full-range, overload and short-circuit protection.aR Partial-range, short-circuit protection.5 Characteristics5.2 Voltage ratingFor AC, the rating shall be 2000

44、 V ac or less.The DC voltage rating may be different from the AC rating.5.5 Interrupting ratingFor 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 I2t charac

45、teristicsMaximum values of peak let-through current and clearing I2t are provided by the manufacturer. SeeClause 8.5.3.6 Marking6.1 Marking of fusesIn addition to the marking requirements in Part 1: A semiconductor fuse shall be marked with:e) the fuse class or classification (See Clause 6.2):gR (Fu

46、ll-range); oraR (Partial-range); andg) the marking Current Limiting may be applied if the fuse complies with the threshold ratiotest.AUGUST 1, 2000NMX-J-009/248/13-2000-ANCE CSA C22.2 NO. 248.13-00 UL 248-13106.2 Marking symbolsThe preferred symbol for class or classification is This symbol is optio

47、nal.7 Construction7.1 DimensionsThe fuse dimensions are not specified, but shall be in accordance with the manufacturers specifications.This specification shall define the envelope shape including length, height, width or diameter, andmounting details.8 Tests8.2 Verification of temperature rise and

48、current-carrying capacity8.2.3 Test method1.0 In Temperature rise and current-carrying capacity8.2.4 Acceptability of test resultsIn addition to the requirements in Part 1: The maximum temperature rise shall not exceed the following:Contacts 130CAUGUST 11, 2005 NMX-J-009/248/13-2000-ANCE CSA C22.2 N

49、O. 248.13-00 UL 248-13 118.3 Verification of overload operationFor gR fuses, the overload operation point and maximum opening time shall be specified by themanufacturer 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 greater, onesample is to be tested.8.4 Verification of operation at rated voltageAC Part 1, Table 5Test 1 High current specified by manu