CAN CSA-C22 2 NO 248 2-2000 Low-Voltage Fuses – Part 2 Class C 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 2: Class C FusesAugust 1, 2000CSA InternationalCSA C22.2 No. 248.2-00Second EditionUnderwriters LaboratoriesInc.UL 248-2Second EditionNational Association ofStandardization andCertification of the ElectricalSectorNMX-J-009/248/2-2000-ANCEFirst EditionCommitment for AmendmentsT

2、his Standard is issued jointly by the National Association of Standardization andCertification of the Electrical Sector (ANCE), the CSA International, andUnderwriters Laboratories Incorporated (UL). Amendments to this Standard willbe made only after processing according to the Standards writing proc

3、edures byANCE, CSA, and ULRevisions 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 latest set

4、 of revised requirements.Copyright 2000ANCERights reserved in favorof ANCEISBN 1-55324-228-9Copyright 2000CSA InternationalAll rights reserved. Nopart of this publicationmay be reproduced inany form whatsoeverwithout the priorpermission of thepublisher.ISBN 0-7629-0552-2Copyright 1996,2000Underwrite

5、rsLaboratories Inc.Update No. 3CAN/CSA-C22.2 No. 248.2-00August 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 2: Class

6、 C 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 margin on the attach

7、ed replacement pages:Revised Title page, copyright page, Contents, Preface, and Clauses 1 and 8.2.4New NoneDeleted Foreword (ANCE) and Foreword (UL)CAN/CSA-C22.2 No. 248.2-00 originally consisted of 16 pages, each dated August 2000. It now consists of the following pages:August 2000 1013, 15, and 16

8、November 2004 CoverAugust 2005 19 and 14Update your copy by inserting these revised pages.Keep the pages you remove for reference.Low-Voltage Fuses Part 2: Class C FusesAugust 1, 2000(Title Page Reprinted: August 11, 2005)Canadian StandardsAssociationCAN/CSA-C22.2 No. 248.2-00Second EditionUnderwrit

9、ers LaboratoriesInc.UL 248-2Second EditionANSI/UL 248-2-2005National Association ofStandardization andCertification of the ElectricalSectorNMX-J-009/248/2-2000-ANCEFirst EditionCommitment for AmendmentsThis Standard is issued jointly by the National Association of Standardization andCertification of

10、 the Electrical Sector (ANCE), the CSA International, andUnderwriters Laboratories Incorporated (UL). Amendments to this Standard willbe made only after processing according to the Standards writing procedures byANCE, CSA, and ULRevisions of this Standard will be made by issuing revised or additiona

11、l 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 in favorof ANCEISBN 1-55324-228-

12、9Copyright 2000Canadian StandardsAssociationAll rights reserved. Nopart of this publicationmay be reproduced inany form whatsoeverwithout the priorpermission of thepublisher.ISBN 0-7629-0552-2Copyright 1996,2005UnderwritersLaboratories Inc.CONTENTSPreface .41 General 91.1 Scope .94 Classification .9

13、5 Characteristics 95.2 Voltage rating 95.3 Current rating 95.5 Interrupting rating .95.6 Peak let-through current and clearing I2t characteristics 107 Construction .107.1 Dimensions .108 Tests .138.1 General 138.2 Verification of temperature rise and current-carrying capacity .138.3 Verification of

14、overload operation 148.4 Verification of operation at rated voltage .148.5 Verification of peak let-through current and clearing I2t characteristics .15AUGUST 11, 2005 NMX-J-009/248/2-2000-ANCE CAN/CSA-C22.2 NO. 248.2-00 UL 248-2 3PrefaceThis is the common UL, CSA, and ANCE Standard for Low-Voltage

15、Fuses Part 2: Class C Fuses. Thisis the second edition of CAN/CSA-C22.2 No. 248.2-00 (superseding the first edition, published in 1996),the second edition of UL 248-2, and the first edition of NMX-J-009/248/2-2000-ANCE.This Standard was prepared by a Technical Harmonization Committee comprised of me

16、mbers fromUnderwriters Laboratories, CSA International, the National Association of Standardization andCertification of the Electrical Sector, the end product manufacturers, and material suppliers. The effortsand support of the members of the Technical Harmonization Committee are gratefully acknowle

17、dged.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 the fusemanufacturers and users.This Standard was reviewed by the CSA Subcommittee on Fuses and approved by t

18、he 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 American National Standards Institute (ANSI) as an AmericanNational Standard.The most recent designation of ANSI

19、/UL 248-2 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 under continuous maintenance, whereby each revision is ANSI approved upon publication.Comments or proposals for

20、 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) at http:/.Note: Although the intended primary application of this Standard is stated in its Scope, it is impo

21、rtant 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 published as an Identical Standard. An identical standard is a standard that isthe same in technical content except fo

22、r conflicts in Codes and Governmental Regulations. Presentationis word for word except for editorial changes.InterpretationsThe interpretation by the SDO (Standards Development Organization) of an identical standard shall bebased on the literal text to determine compliance with the standard in accor

23、dance 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 more accurately reflect the intent.ANCE Effective DateThe effective date for ANCE will be announced through the D

24、iario Oficial de la Federation (OfficialGazette) and is indicated on the cover page.AUGUST 11, 2005NMX-J-009/248/2-2000-ANCE CAN/CSA-C22.2 NO. 248.2-00 UL 248-24CSA Effective DateThe effective date for CSA will be announced through CSA Informs or CSA Certification Notice.UL Effective DateThis editio

25、n of the standard is now in effect.AUGUST 11, 2005 NMX-J-009/248/2-2000-ANCE CAN/CSA-C22.2 NO. 248.2-00 UL 248-2 5This page intentionally left blank.AUGUST 11, 2005NMX-J-009/248/2-2000-ANCE CAN/CSA-C22.2 NO. 248.2-00 UL 248-26AUGUST 11, 2005 NMX-J-009/248/2-2000-ANCE CSA C22.2 NO. 248.2-00 UL 248-2

26、7Foreword (CSA) The Canadian Standards Association (CSA) develops standards under the name Canadian StandardsAssociation, and provides certification and testing under the name CSA International. CSA Internationalprovides certification services for manufacturers who, under license from CSA, wish to u

27、se 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 in the interest of maintaining agreed-uponstandards of quality, performance, interchangeability and/or safety, as appropri

28、ate. Where applicable,certification may form the basis for acceptance by inspection authorities responsible for enforcement ofregulations. Where feasible, programs will be developed for additional products for which certification isdesired by producers, consumers, or other interests. In performing i

29、ts 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 of the Association represent its professional judgement given withdue consideration to the necessary limitations of practic

30、al 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 maybe deemed to meet the Standard providing the feature or difference is found acceptable utilizingappropriate CSA Internati

31、onal 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 this Standard.Products shall not be certifiable if they are discovered to contravene applicable laws or regulations. Testin

32、g techniques, test procedures, and instrumentation frequently must be prescribed by CSAInternational in addition to the technical requirements contained in Standards of CSA. In addition tomarkings specified in the Standard, CSA International may require special cautions, markings, andinstructions th

33、at 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 injury or damage that may occur during or as the result of tests,wherever performed, whether performed in whole or in part by

34、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. Manufacturers should note that, in the event of the failure of CSA International to resolve an issue arisingfrom the int

35、erpretation of requirements, there is an appeal procedure: the complainant should submit thematter, in writing, to the Secretary of the Canadian Standards Association. If this Standard is to be used in obtaining CSA Certification please remember, when making application forcertification, to request

36、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 furtherinformation concerning CSA Certification, please address your inquiry to Applications and CustomerService, CSA Internati

37、onal, 178 Rexdale Boulevard, Toronto, Ontario, Canada M9W 1R3. This page intentionally left blank.AUGUST 11, 2005NMX-J-009/248/2-2000-ANCE CAN/CSA-C22.2 NO. 248.2-00 UL 248-28Low-Voltage Fuses Part 2: Class C Fuses1 GeneralNOTE This Part is intended to be read together with the Standard for Low-Volt

38、age Fuses Part 1: General Requirements, hereafterreferred to as Part 1. The numbering of the Clauses in this Part corresponds to like numbered Clauses in Part 1. The requirementsof Part 1 apply unless modified by this Part. For Clauses not shown below, refer to the Standard for Low-Voltage Fuses Par

39、t 1:General Requirements, NMX-J-009/248/2-2000-ANCE CAN/CSA C22.2 No. 248.1 UL 248-1.1.1 ScopeThis Part applies to Class C fuses rated 1200 A or less and 600 V ac. DC ratings are optional.4 ClassificationClass C fuses are non-renewable with an interrupting rating of 200,000 A. Class C fuses are divi

40、ded intoeight body sizes. The maximum current rating, In, for each size is specified in this Part.5 Characteristics5.2 Voltage ratingFor AC, the rating shall be 600 V ac.The DC voltage rating may be different from the AC rating.5.3 Current ratingRefer to Figure A for range of current ratings in each

41、 body size.5.5 Interrupting ratingFor 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 95.6 Peak let-through current and clearing I2t characteristicsMaximum values of pe

42、ak let-through current and clearing I2t are given in Table A.Table A Maximum peak let-through current and clearing I2t for Class C fuses at 200 kACurrent rating In, A Peak let-through current, A I2t, ampere-squared seconds0 30 12,000 15,00031 60 20,000 60,00061 100 30,000 200,000101 200 40,000 750,0

43、00201 400 70,000 4,000,000401 600 100,000 10,000,000601 800 115,000 25,000,000801 1200 125,000 40,000,0007 Construction7.1 DimensionsFuse dimensions are shown in Figure A.This is generated text for figtxt.Figure A Dimensions of Class C fuses in mm0 100 AAUGUST 1, 2000NMX-J-009/248/2-2000-ANCE CSA C2

44、2.2 NO. 248.2-00 UL 248-2108 Tests8.1 General8.1.1 Types of testsTable 1 Number of fuses to be testedTestCurrent rating In,A0 100 101 600 601 12008.3 Verification of overload operationb) tmax(1.6 In)3218.2 Verification of temperature rise and current-carrying capacity8.2.3 Test methodFuses rated 0 6

45、00 A1.0 In Temperature rise1.1 In Current-carrying capacity, InfFuses rated 601 1200 A1.1 In Temperature rise and current-carrying capacity, Inf8.2.3.1 Fuses rated 600 A or lessIn addition to the requirements in Part 1: At the conclusion of the temperature rise test, the test currentshall be increas

46、ed without interruption to 1.1 Infor a period of not less than 15 min for fuses rated0200A and not less than 30 min for fuses rated 201 600 A. Temperature is not to be monitored during thistime.AUGUST 1, 2000 NMX-J-009/248/2-2000-ANCE CSA C22.2 NO. 248.2-00 UL 248-2 138.2.4 Acceptability of test res

47、ultsIn addition to the requirements in Part 1: The maximum temperature rise shall not exceed the following:Contacts 0 to 100 A 55C101 to 600 A 75C601 to 1200 A 75C above calibration temperature8.3 Verification of overload operation8.3.4 Acceptability of test resultsThe maximum clearing time (tmax) a

48、t 1.6 Inshall not exceed the following:60 min (Fuses rated060A)120 min (Fuses rated 61 200 A)240 min (Fuses rated 201 1200 A)8.4 Verification of operation at rated voltageFor AC Part 1, Table 5Test 1 200 kATest 2 Maximum energyTest 5b2InFor DC Part 1, Table 6Test 1 Interrupting ratingTest 2 Maximum

49、energyTest 5c2InAUGUST 11, 2005NMX-J-009/248/2-2000-ANCE CSA C22.2 NO. 248.2-00 UL 248-214Update No. 2 C22.2 No. 248.2-00 November 2004 Note: 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 2: Class C Fuses originally published August 2000 The following revisions h