CAN CSA-C22 2 NO 248 14-2000 LOW-VOLTAGE FUSES – PART 14 SUPPLEMENTAL 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 14: SUPPLEMENTALFUSESAugust 1, 2000CSA InternationalCSA C22.2 No. 248.14-00Second EditionUnderwriters LaboratoriesInc.UL 248-14Second EditionNational Association ofStandardization andCertification of the ElectricalSectorNMX-J-009/248/14-2000-ANCEFirst EditionCommitment for Ame

2、ndmentsThis 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

3、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 lates

4、t set of revised requirements.Copyright 2000ANCERights reserved in favorof ANCEISBN 1-55324-252-1Copyright 2000CSA InternationalAll rights reserved. Nopart of this publicationmay be reproduced inany form whatsoeverwithout the priorpermission of thepublisher.ISBN 0-7629-0564-6Copyright 1994,2000Under

5、writersLaboratories Inc.Update No. 3CAN/CSA-C22.2 No. 248.14-00August 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 14

6、: Supplemental 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 o

7、n the attached replacement pages:Revised Title page, copyright page, Contents, Preface, and Clauses 1, 4, 5.5, 6.1, 8.2.1.1, 8.2.4, and 8.4.4New Clause 7.2Deleted Foreword (ANCE) and Foreword (UL)CAN/CSA-C22.2 No. 248.14-00 originally consisted of 14 pages, each dated August 2000. It now consists of

8、 the following pages:November 2004 CoverAugust 2005 114Update your copy by inserting these revised pages.Keep the pages you remove for reference.LOW-VOLTAGE FUSES PART 14: SUPPLEMENTALFUSESAugust 1, 2000(Title Page Reprinted: August 11, 2005)Canadian StandardsAssociationCAN/CSA-C22.2 No. 248.14-00Se

9、cond EditionUnderwriters LaboratoriesInc.UL 248-14Second EditionANSI/UL 248-14-2005National Association ofStandardization andCertification of the ElectricalSectorNMX-J-009/248/14-2000-ANCEFirst EditionCommitment for AmendmentsThis Standard is issued jointly by the National Association of Standardiza

10、tion 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 made by issuing

11、 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 in favorof

12、ANCEISBN 1-55324-252-1Copyright 2000Canadian StandardsAssociationAll rights reserved. Nopart of this publicationmay be reproduced inany form whatsoeverwithout the priorpermission of thepublisher.ISBN 0-7629-0564-6Copyright 1994,2005UnderwritersLaboratories Inc.CONTENTSPreface .41 General 91.1 Scope

13、.94 Classification .95 Characteristics 95.2 Voltage rating 95.3 Current rating 95.5 Interrupting rating 105.6 Peak let-through current and clearing I2t characteristics 106 Marking .106.1 Marking of fuses 107 Construction .117.1 Fuse dimensions 117.2 Current-carrying parts 118 Tests .118.1 General 11

14、8.2 Verification of temperature rise and current-carrying capacity .128.3 Verification of overload operation 138.4 Verification of operation at rated voltage .13AUGUST 11, 2005 NMX-J-009/248/14-2000-ANCE CAN/CSA-C22.2 NO. 248.14-00 UL 248-14 3PrefaceThis is the common UL, CSA, and ANCE Standard for

15、Low-Voltage Fuses Part 14: Supplemental Fuses.This is the second edition of UL 248-14, the second edition of CAN/CSA-C22.2 No. 248.14-00(superseding the first edition, published in 1994), and the first edition of NMX-J-009/248/14-2000-ANCE.This Standard was prepared by a Technical Harmonization Comm

16、ittee 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 Harmonization Committee ar

17、e 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 Subcommittee on Fu

18、ses 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 Standard.The most recen

19、t designation of ANSI/UL 248-14 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.Com

20、ments 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 Standard is stated in

21、 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 in technical conten

22、t 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 compliance with the standa

23、rd 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 will be announced th

24、rough the Diario Oficial de la Federation (OfficialGazette) and is indicated on the cover page.AUGUST 11, 2005NMX-J-009/248/14-2000-ANCE CAN/CSA-C22.2 NO. 248.14-00 UL 248-144CSA Effective DateThe effective date for CSA will be announced through either a CSA Informs or CSA Certification Notice.UL Ef

25、fective DateThis edition of the standard is now in effect.AUGUST 11, 2005 NMX-J-009/248/14-2000-ANCE CAN/CSA-C22.2 NO. 248.14-00 UL 248-14 5This page intentionally left blank.AUGUST 11, 2005NMX-J-009/248/14-2000-ANCE CAN/CSA-C22.2 NO. 248.14-00 UL 248-146AUGUST 11, 2005 NMX-J-009/248/14-2000-ANCE CS

26、A C22.2 NO. 248.14-00 UL 248-14 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, u

27、nder 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, performance, interchangeab

28、ility 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 producers, consumers, or

29、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 consideration to the

30、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 found acceptable ut

31、ilizingappropriate 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 to contravene applic

32、able 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 require special cautio

33、ns, 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 performed, whether p

34、erformed 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 International to reso

35、lve 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, when making applicati

36、on 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 to Applications an

37、d CustomerService, CSA International, 178 Rexdale Boulevard, Toronto, Ontario, Canada M9W 1R3. This page intentionally left blank.AUGUST 11, 2005NMX-J-009/248/14-2000-ANCE CAN/CSA-C22.2 NO. 248.14-00 UL 248-148Low-Voltage Fuses Part 14: Supplemental Fuses1 GeneralNOTE This Part is intended to be rea

38、d 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 below, refer

39、to the Standard for Low-Voltage Fuses Part 1:General Requirements, NMX-J-009/248/14-2000-ANCE CAN/CSA C22.2 No. 248.1 UL 248-1.1.1 ScopeThis Part applies to supplemental fuses rated 60 A or less intended only for supplementary overcurrentprotection where branch circuit or equivalent applications are

40、 not involved. DC ratings are optional.4 ClassificationSupplemental fuses are constructed so they cannot be installed in fuseholders intended for fuses coveredin the other Parts 2, 3, 4, 6, 7, 8, 9, 10, 11, 12, 13 and 15 of the Low-Voltage Fuse Standard series.Time-delay ratings are optional.Some su

41、pplemental fuses may physically fit into Part 5 Class G fuseholders. However, supplementalfuses are intended to protect equipment only and are not permitted to be used instead of Class G fusesin branch circuits.5 Characteristics5.2 Voltage ratingThe DC voltage rating may be different from the AC rat

42、ing.5.3 Current rating60 A or lessAUGUST 11, 2005 NMX-J-009/248/14-2000-ANCE CAN/CSA-C22.2 NO. 248.14-00 UL 248-14 95.5 Interrupting ratingFor AC 10,000 A unless otherwise specified below.The DC interrupting rating may be different from the AC rating.Microfuse: 50 A minimum interrupting ratingA fuse

43、 rated 250 V ac may have a dual interrupting rating. This rating shall be 10,000 A at 125 V ac anda lower interrupting rating at 250 V ac as specified in Table A.Table A Interrupting ratings for dual interrupting rated fuses at 250 V acCurrent rating In, A Minimum interrupting rating, A01 351.1 3.5

44、1003.6 10 20010.1 15 75015.1 30 1500Fuses rated less than 125 V ac may have an interrupting rating less than 10,000 A.Fuses with interrupting ratings greater than 10,000 A shall be rated 50,000 A or 100,000 A, AC.5.6 Peak let-through current and clearing I2t characteristicsNot specified.6 Marking6.1

45、 Marking of fusesAll required markings shall appear on the smallest package.The term Supplemental Fuse is the appropriate fuse classification, but it does not have to be marked.Neither a fuse nor its package shall bear a marking which states or implies that the fuse is current-limiting.Except for mi

46、crofuses, the minimum marking on the fuse shall be:a) the manufacturers name, trademark, or both;b) current rating including the corresponding unit of measurement; andc) voltage rating.For microfuses, the smallest package shall be marked with the required information. Fuses rated above125 V shall be

47、 marked to indicate their current rating. Fuses rated 125 V or less may be marked at theoption of the manufacturer. Except for current rating of fuses above 125 V, color coding of microfuses isan acceptable type of marking. When used, the applicable color code scheme shall be marked on thesmallest p

48、ackage.AUGUST 11, 2005NMX-J-009/248/14-2000-ANCE CAN/CSA-C22.2 NO. 248.14-00 UL 248-1410The designation D may be used as a substitute for Time Delay (for qualifying fuses only).7 Construction7.1 Fuse dimensionsThe dimensions of a supplemental fuse are not specified, except envelope dimensions are gi

49、ven for themicrofuse in Part 1, Clause 2.2.7.2.7.2 Current-carrying partsFerrous parts inherently protected against corrosion are permitted when the current rating does notexceed 15 amps and when the fuse is intended for soldered connections e.g. surface mount or pigtail typeconnections.8 Tests8.1 General8.1.1 Types of testsRequired test samples are shown in Table 1.Table 1 Number of supplemental fuses to be testedTest description Samples NotesVerification of temperature rise and current-ca