1、LOW-VOLTAGE FUSES PART 15: CLASS T FUSESAugust 1, 2000CSA InternationalCSA C22.2 No. 248.15-00Second EditionUnderwriters LaboratoriesInc.UL 248-15Second EditionNational Association ofStandardization andCertification of the ElectricalSectorNMX-J-009/248/15-2000-ANCEFirst EditionCommitment for Amendme
2、ntsThis 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 writing proc
3、edures 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 latest se
4、t of revised requirements.Copyright 2000ANCERights reserved in favorof ANCEISBN 1-55324-254-8Copyright 2000CSA InternationalAll rights reserved. Nopart of this publicationmay be reproduced inany form whatsoeverwithout the priorpermission of thepublisher.ISBN 0-7629-0565-4Copyright 1994,2000Underwrit
5、ersLaboratories Inc.Update No. 3CAN/CSA-C22.2 No. 248.15-00August 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 15: Cl
6、ass T 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 att
7、ached replacement pages:Revised Title page, copyright page, Contents, Preface, Clauses 1, 1.1, 4, 8.2.4, Table B, and Figure BNew NoneDeleted Foreword (ANCE) and Foreword (UL)CAN/CSA-C22.2 No. 248.15-00 originally consisted of 20 pages, each dated August 2000. It now consists of the following pages:
8、August 2000 10, 1215, 17, 19, and 20November 2004 CoverAugust 2005 19, 11, 16, and 18Update your copy by inserting these revised pages.Keep the pages you remove for reference.LOW-VOLTAGE FUSES PART 15: CLASS T FUSESAugust 1, 2000(Title Page Reprinted: August 11, 2005)Canadian StandardsAssociationCAN
9、/CSA-C22.2 No. 248.15-00Second EditionUnderwriters LaboratoriesInc.UL 248-15Second EditionANSI/UL 248-15-2005National Association ofStandardization andCertification of the ElectricalSectorNMX-J-009/248/15-2000-ANCEFirst EditionCommitment for AmendmentsThis Standard is issued jointly by the National
10、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 writing procedures by ANCE, CSA,and UL.Revisions of this Standa
11、rd 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 of revised requirements.Copyright 2000,2005 ANCER
12、ights reserved in favorof ANCEISBN 1-55324-254-8Copyright 2000Canadian StandardsAssociationAll rights reserved. Nopart of this publicationmay be reproduced inany form whatsoeverwithout the priorpermission of thepublisher.ISBN 0-7629-0565-4Copyright 1994,2005UnderwritersLaboratories Inc.CONTENTSPrefa
13、ce .41 General 91.1 Scope .94 Classification .95 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 .127.1 Dimensions .128 Tests .178.2 Verification of temperature rise and current-carrying
14、 capacity .178.3 Verification of overload operation 188.4 Verification of operation at rated voltage .188.5 Verification of peak let-through current and clearing I2t characteristics .19AUGUST 11, 2005 NMX-J-009/248/15-2000-ANCE CAN/CSA-C22.2 NO. 248.15-00 UL 248-15 3PrefaceThis is the common UL, CSA
15、, and ANCE Standard for Low-Voltage Fuses Part 15: Class T Fuses. Thisis the second edition of CAN/CSA-C22.2 No. 248.15-00 (superseding the first edition, published in 1994),the second edition of UL 248-15, and the first edition of NMX-J-009/248/15-2000-ANCE.This Standard was prepared by a Technical
16、 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 suppliers. The effortsand support of the members of the Technical Harmoni
17、zation 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 the fusemanufacturers and users.This Standard was reviewed by the CSA
18、 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 American National Standards Institute (ANSI) as an AmericanNational Stan
19、dard.The most recent designation of ANSI/UL 248-15 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 u
20、pon 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) at http:/.Note: Although the intended primary application of this St
21、andard 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 purpose.Level of HarmonizationThis trinational standard is published as an Identical Standard. An identical standard is a standard that isthe same
22、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) of an identical standard shall bebased on the literal text to determine complia
23、nce 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 more accurately reflect the intent.ANCE Effective DateThe effective date for ANCE w
24、ill be announced through the Diario Oficial de la Federation (OfficialGazette) and is indicated on the cover page.AUGUST 11, 2005NMX-J-009/248/15-2000-ANCE CAN/CSA-C22.2 NO. 248.15-00 UL 248-154CSA Effective DateThe effective date for CSA will be announced through either a CSA Informs or CSA Certifi
25、cation Notice.UL Effective DateThis edition of the standard is now in effect.AUGUST 11, 2005 NMX-J-009/248/15-2000-ANCE CAN/CSA-C22.2 NO. 248.15-00 UL 248-15 5This page intentionally left blank.AUGUST 11, 2005NMX-J-009/248/15-2000-ANCE CAN/CSA-C22.2 NO. 248.15-00 UL 248-156AUGUST 11, 2005 NMX-J-009/
26、248/15-2000-ANCE CSA C22.2 NO. 248.15-00 UL 248-15 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 m
27、anufacturers 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 in the interest of maintaining agreed-uponstandards of quality, perform
28、ance, 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 developed for additional products for which certification isdesired by produc
29、ers, 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 of the Association represent its professional judgement given withdue co
30、nsideration 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 maybe deemed to meet the Standard providing the feature or difference is
31、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 this Standard.Products shall not be certifiable if they are discovered t
32、o 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 addition tomarkings specified in the Standard, CSA International may req
33、uire 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 injury or damage that may occur during or as the result of tests,wherever p
34、erformed, 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. Manufacturers should note that, in the event of the failure of CSA In
35、ternational 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 Standard is to be used in obtaining CSA Certification please remember, wh
36、en 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 furtherinformation concerning CSA Certification, please address your inquiry
37、 to Applications and CustomerService, CSA International, 178 Rexdale Boulevard, Toronto, Ontario, Canada M9W 1R3. This page intentionally left blank.AUGUST 11, 2005NMX-J-009/248/15-2000-ANCE CAN/CSA-C22.2 NO. 248.15-00 UL 248-158Low-Voltage Fuses Part 15: Class T Fuses1 GeneralNOTE This Part is inte
38、nded 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 corresponds to like numbered Clauses in Part 1. The requirementsof Part 1 apply unless modified by this Part. For Clauses not shown
39、 below, refer to the Standard for Low-Voltage Fuses Part 1:General Requirements, NMX-J-009/248/15-2000-ANCE CAN/CSA C22.2 No. 248.1 UL 248-1.1.1 ScopeThis Part applies to Class T fuses rated 1200 A or less and 300 or 600 V ac. DC ratings are optional.4 ClassificationClass T fuses are non-renewable a
40、nd current limiting with an interrupting rating of 200,000 A. Each of thevoltage ratins, 300 and 600 V ac, is divided into eight body sizes. The maximum current rating Infor eachsize is specified in this Part. Time-delay ratings are optional.5 Characteristics5.2 Voltage ratingFor AC, the rating shal
41、l be 300 V ac or 600 V ac in accordance with dimensions shown in Figures A andB.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 body size for each voltage rating.5.5 Interrupting ratingFor AC 200,000 AFor DC, the pref
42、erred ratings are 10,000, 20,000, 50,000, 100,000, 150,000, or 200,000 AAUGUST 11, 2005 NMX-J-009/248/15-2000-ANCE CAN/CSA-C22.2 NO. 248.15-00 UL 248-15 95.6 Peak let through current and clearing I2t characteristicsMaximum values of peak let-through current and clearing I2t for 300 V ac fuses are gi
43、ven in Table A andfor 600 V ac fuses are given in Table B.Table A Maximum peak let-through current and clearing I2t for 300 V ac Class T fusesCurrent ratingIn,ABetween threshold and 50 KAAt 100 kA At 200 kAPeak let-throughcurrent, AI2t, ampere-squaredsecondsPeak let-throughcurrent, AI2t, ampere-squa
44、redsecondsPeak let-throughcurrent, AI2t, ampere-squaredseconds1 800 4003 1300 6006 2000 100010 3000 150015 4000 200020 4500 250025 5500 270030 5,000 3,500 7000 3500 9,000 350035 7000 600040 7200 850045 7600 900050 8000 11,00060 7,000 15,000 9000 15,000 12,000 15,00070 10,000 25,00080 10,700 30,00090
45、 11,600 38,000100 9,000 40,000 12,000 40,000 15,000 40,000110 12,000 50,000125 13,000 75,000150 14,000 88,000175 15,000 115,000200 13,000 150,000 16,000 150,000 20,000 150,000225 21,000 175,000250 22,000 225,000300 24,000 300,000350 27,000 400,000400 22,000 550,000 28,000 550,000 35,000 550,000450 3
46、2,000 600,000500 37,000 800,000600 29,000 1,000,000 37,000 1,000,000 46,000 1,000,000700 45,000 1,250,000800 37,000 1,500,000 50,000 1,500,000 65,000 1,500,0001000 65,000 3,500,0001200 50,000 3,500,000 65,000 3,500,000 80,000 4,000,000AUGUST 1, 2000NMX-J-009/248/15-2000-ANCE CSA C22.2 NO. 248.15-00
47、UL 248-1510Table B Maximum peak let-through current and clearing I2t for 600 V ac Class T fusesCurrent ratingIn,ABetween threshold and 50 KA At 100 kA At 200 kAPeak let-throughcurrent, AI2t, ampere-squaredsecondsPeak let-throughcurrent, AI2t, ampere-squaredsecondsPeak let-throughcurrent, AI2t, amper
48、e-squaredseconds1 1000 8003 1500 12006 2300 200010 3300 300015 4000 400020 5000 500025 6000 550030 6,000 7,000 7500 7000 12,000 700035 7500 12,00040 8000 17,00045 8500 18,00050 9000 22,00060 8,000 30,000 10,000 30,000 16,000 30,00070 11,500 50,00080 12,500 60,00090 13,500 75,000100 12,000 60,000 14,
49、000 80,000 20,000 80,000110 14,500 100,000125 15,500 150,000150 17,000 175,000175 18,500 225,000200 16,000 200,000 20,000 300,000 30,000 300,000225 22,500 350,000250 24,000 450,000300 26,000 600,000350 29,000 800,000400 25,000 1,000,000 30,000 1,100,000 45,000 1,100,000450 36,000 1,500,000500 42,000 2,000,000600 35,000 2,500,000 45,000 2,500,000 70,000 2,500,000700 50,000 3,500,000800 50,000 4,000,000 55,000 4,000,000 75,000 4,000,0001000 65,000 8,000,0001200 55,500 10,000,000 70,000 10,000,000 88,000 10,00
