1、LOW-VOLTAGE FUSES PART 4: CLASS CC FUSESAugust 1, 2000CSA InternationalCSA C22.2 No. 248.4-00Second EditionUnderwriters LaboratoriesInc.UL 248-4Second EditionNational Association ofStandardization andCertification of the ElectricalSectorNMX-J-009/248/4-2000-ANCEFirst EditionCommitment for Amendments
2、This 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 procedu
3、res 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 set o
4、f revised requirements.Copyright 2000ANCERights reserved in favorof ANCEISBN 1-55324-232-7Copyright 2000CSA InternationalAll rights reserved. Nopart of this publicationmay be reproduced inany form whatsoeverwithout the priorpermission of thepublisher.ISBN 0-7629-0554-9Copyright 1994,2000Underwriters
5、Laboratories Inc.Update No. 3CAN/CSA-C22.2 No. 248.4-00August 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 4: Class C
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 attache
7、d 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. 248.4-00 originally consisted of 12 pages, each dated August 2000. It now consists of the following pages:August 2000 10 and 12November
8、 2004 CoverAugust 2005 19 and 11Update your copy by inserting these revised pages.Keep the pages you remove for reference.LOW-VOLTAGE FUSES PART 4: CLASS CC FUSESAugust 1, 2000(Title Page Reprinted: August 11, 2005)Canadian StandardsAssociationCAN/CSA-C22.2 No. 248.4-00Second EditionUnderwriters Lab
9、oratoriesInc.UL 248-4Second EditionANSI/UL 248-4-2005National Association ofStandardization andCertification of the ElectricalSectorNMX-J-009/248/4-2000-ANCEFirst EditionCommitment for AmendmentsThis Standard is issued jointly by the National Association of Standardization andCertification of the El
10、ectrical 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 made by issuing revised or additional pagesbea
11、ring 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 1-55324-232-7Copyright
12、 2000Canadian StandardsAssociationAll rights reserved. Nopart of this publicationmay be reproduced inany form whatsoeverwithout the priorpermission of thepublisher.ISBN 0-7629-0554-9Copyright 1994,2005UnderwritersLaboratories Inc.CONTENTSPreface .41 General 91.1 Scope .94 Classification .95 Characte
13、ristics 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 .108.2 Verification of temperature rise and current-carrying capacity .118.3 Verification of overload operation 118.4
14、 Verification of operation at rated voltage .118.5 Verification of peak let-through current and clearing I2t characteristics .12AUGUST 11, 2005 NMX-J-009/248/4-2000-ANCE CAN/CSA-C22.2 NO. 248.4-00 UL 248-4 3PrefaceThis is the common UL, CSA, and ANCE Standard for Low-Voltage Fuses Part 4: Class CC F
15、uses. Thisis the second edition of CAN/CSA-C22.2 No. 248.4-00 (superseding the first edition, published in 1994),the second edition of UL 248-4, and the first edition of NMX-J-009/248/4-2000-ANCE.This Standard was prepared by a Technical Harmonization Committee comprised of members fromUnderwriters
16、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 acknowledged.The present Mexica
17、n 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 the TechnicalCommittee o
18、n 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/UL 248-4 as an America
19、n 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 revisions on any part
20、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 important to note that it r
21、emains 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 in technical content except for conflicts in Codes and Governmen
22、tal 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 accordance with the proceduralrules of
23、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 Diario Oficial de la Federation (Of
24、ficialGazette) and is indicated on the cover page.AUGUST 11, 2005NMX-J-009/248/4-2000-ANCE CAN/CSA-C22.2 NO. 248.4-00 UL 248-44CSA Effective DateThe effective date for CSA will be announced through either a CSA Informs or CSA Certification Notice.UL Effective DateThis edition of the standard is now
25、in effect.AUGUST 11, 2005 NMX-J-009/248/4-2000-ANCE CAN/CSA-C22.2 NO. 248.4-00 UL 248-4 5This page intentionally left blank.AUGUST 11, 2005NMX-J-009/248/4-2000-ANCE CAN/CSA-C22.2 NO. 248.4-00 UL 248-46AUGUST 11, 2005 NMX-J-009/248/4-2000-ANCE CSA C22.2 NO. 248.4-00 UL 248-4 7Foreword (CSA) The Canad
26、ian 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 use the appropriateregiste
27、red 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 appropriate. Where applicable,cer
28、tification 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 its functions in accordanc
29、e 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 practical operation and state of
30、 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 International Operating Procedures
31、. 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. Testing techniques, test proced
32、ures, 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 that are not specified by t
33、he 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 the manufacturer or the A
34、ssociation, 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 interpretation of requiremen
35、ts, 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 all current Amendments, B
36、ulletins, 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 International, 178 Rexdale Bouleva
37、rd, Toronto, Ontario, Canada M9W 1R3. This page intentionally left blank.AUGUST 11, 2005NMX-J-009/248/4-2000-ANCE CAN/CSA-C22.2 NO. 248.4-00 UL 248-48Low-Voltage Fuses Part 4: Class CC Fuses1 GeneralNOTE This Part is intended to be read together with the Standard for Low-Voltage Fuses Part 1: Genera
38、l 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 Part 1:General Requirements
39、, NMX-J-009/248/4-2000-ANCE CAN/CSA C22.2 No. 248.1 UL 248-1.1.1 ScopeThis Part applies to Class CC fuses rated 30 A or less and 600 V ac. DC ratings are optional.4 ClassificationClass CC fuses are non-renewable and current limiting, with an interrupting rating of 200,000 A. Class CCfuses have one b
40、ody size. Time-delay ratings are optional.5 Characteristics5.2 Voltage ratingFor AC, the rating shall be 600 V ac.For DC, the voltage rating may be different from the AC rating.5.3 Current rating30 A or less.5.5 Interrupting ratingFor AC 200,000 AFor DC, the preferred ratings are 10,000, 20,000, 50,
41、000, 100,000, 150,000, or 200,000 A.AUGUST 11, 2005 NMX-J-009/248/4-2000-ANCE CAN/CSA-C22.2 NO. 248.4-00 UL 248-4 95.6 Peak let-through current and clearing I2t characteristicsMaximum values of peak let-through current and clearing I2t are given in Table A.Table A Maximum peak let-through current an
42、d clearing I2t for Class CC 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, ampere-squaredseconds0 15 3,000 2,000 3,000 2,000 4,000 3,00016 20
43、3,000 2,000 4,000 3,000 5,000 3,00021 30 6,000 7,000 7,500 7,000 12,000 7,0007 Construction7.1 DimensionsFuse dimensions are shown in Figure A.This is generated text for figtxt.8 TestsFigure A Dimensions of Class CC fuses in mm (in)Current rating In,AOverall length Ferrule length Ferrule diameter Re
44、jection lengthRejectiondiameterAaBbCbKbMb38.10 9.53 10.29 3.18 6.350 30 (1.500) (0.375) (0.405) (0.125) (0.250)aTolerances: 0.79 mm (0.031 in).bTolerances: 0.13 mm (0.005 in).AUGUST 1, 2000NMX-J-009/248/4-2000-ANCE CSA C22.2 NO. 248.4-00 UL 248-4108.2 Verification of temperature rise and current-car
45、rying capacity1.0 In Temperature rise1.1 In 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 increased without interruption to 1.1 Infor a period of not less than 15 min.
46、 Temperature is notto be monitored during this time.8.2.4 Acceptability of test resultsThe maximum temperature rise shall not exceed the following:Contacts 75C;8.3 Verification of overload operationPart 1, Table 4Test 1 1.35 InTest 3 2.0 InTest 4 2.0 Infor time-delay fuses only (can be combined with
47、 Test 3).8.4 Verification of operation at rated voltageAC Part 1, Table 5Test 1 200 kATest 2 Maximum energyTest 3 Threshold ratio. The maximum threshold ratio shall be 60.Test 4a 100 kATest 4b 50 kATest 5b2InPeak let-through current and clearing I2t recorded during Tests 1, 4a, and 4b.DC (optional)
48、Part 1, Table 6Test 1 Interrupting ratingTest 2 Maximum energyAUGUST 11, 2005 NMX-J-009/248/4-2000-ANCE CSA C22.2 NO. 248.4-00 UL 248-4 11Test 5a 9.0 Infor time-delay fuses onlyTest 5c2In8.5 Verification of peak let-through current and clearing I2t characteristics8.5.3 Acceptability of test resultsI
49、n addition to the requirements in Part 1: Peak let-through current and clearing I2t values recorded shallnot exceed the limits specified in Clause 5.6.AUGUST 1, 2000NMX-J-009/248/4-2000-ANCE CSA C22.2 NO. 248.4-00 UL 248-412Update No. 2 C22.2 No. 248.4-00 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 Serv
