CAN CSA-C22 2 NO 248 7-2000 Low-Voltage Fuses – Part 7 Class H Renewable Fuses (Second Edition General Instruction No 1 August 2000 Update No 2 November 2004 Update No 3 August 200.pdf

1、Low-Voltage Fuses Part 7: Class H RenewableFusesAugust 1, 2000CSA InternationalCSA C22.2 No. 248.7-00Second EditionUnderwriters LaboratoriesInc.UL 248-7Second EditionNational Association ofStandardization andCertification of the ElectricalSectorNMX-J-009/248/7-2000-ANCEFirst EditionCommitment for Am

2、endmentsThis 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 late

4、st set of revised requirements.Copyright 2000ANCERights reserved in favorof ANCEISBN 1-55324-238-6Copyright 2000CSA InternationalAll rights reserved. Nopart of this publicationmay be reproduced inany form whatsoeverwithout the priorpermission of thepublisher.ISBN 0-7629-0557-3Copyright 1996,2000Unde

5、rwritersLaboratories Inc.Update No. 3CAN/CSA-C22.2 No. 248.7-00August 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 7:

6、 Class H Renewable 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 marg

7、in on the attached replacement pages:Revised Title page, copyright page, Contents, Preface, Clause 1, and Figures A and BNew NoneDeleted Foreword (ANCE) and Foreword (UL)CAN/CSA-C22.2 No. 248.7-00 originally consisted of 16 pages, each dated August 2000. It now consists of the following pages:August

8、 2000 10 and 1316November 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 7: Class H RenewableFusesAugust 1, 2000(Title Page Reprinted: August 11, 2005)Canadian StandardsAssociationCAN/CSA-C22.2 No.

9、248.7-00Second EditionUnderwriters LaboratoriesInc.UL 248-7Second EditionANSI/UL 248-7-2005National Association ofStandardization andCertification of the ElectricalSectorNMX-J-009/248/7-2000-ANCEFirst EditionCommitment for AmendmentsThis Standard is issued jointly by the National Association of Stan

10、dardization 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

11、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 in f

12、avorof ANCEISBN 1-55324-238-6Copyright 2000Canadian StandardsAssociationAll rights reserved. Nopart of this publicationmay be reproduced inany form whatsoeverwithout the priorpermission of thepublisher.ISBN 0-7629-0557-3Copyright 1996,2005UnderwritersLaboratories Inc.CONTENTSPreface .41 General 91.1

13、 Scope .94 Classification .95 Characteristics 95.2 Voltage rating 95.3 Current rating 95.5 Interrupting rating 106 Marking .106.1 Marking of fuses 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 .14AUGUST 11, 2005 NMX-J-009/248/7-2000-ANCE CAN/CSA-C22.2 NO. 248.7-00 UL 248-7 3PrefaceThis is the common UL, CSA, and ANCE Standard for Low-Voltage Fuses Part 7: Class H RenewableFuses. This is the second edition of CAN/CSA-C22.2

15、 No. 248.7-00 (superseding the first edition,published in 1996), the second edition of UL 248-7, and the first edition of NMX-J-009/248/7-2000-ANCE.This Standard was prepared by a Technical Harmonization Committee comprised of members fromUnderwriters Laboratories, CSA International, the National As

16、sociation 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 Mexican Standard was developed by the TC 32 Fuses from

17、 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 on Industrial Products under the jurisdiction of

18、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 248-7 as an American National Standard (ANSI) occurred onAugust 1,

19、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 of the Standard may be submitted to UL at any ti

20、me.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 remains theresponsibility of the users of the Sta

21、ndard 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 for conflicts in Codes and Governmental Regulations. Presentationis word

22、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 the SDO. If more than one interpretat

23、ion 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 (OfficialGazette) and is indicated on th

24、e cover page.AUGUST 11, 2005NMX-J-009/248/7-2000-ANCE CAN/CSA-C22.2 NO. 248.7-00 UL 248-74CSA Effective DateThe effective 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-009/248/7-2000

25、-ANCE CAN/CSA-C22.2 NO. 248.7-00 UL 248-7 5This page intentionally left blank.AUGUST 11, 2005NMX-J-009/248/7-2000-ANCE CAN/CSA-C22.2 NO. 248.7-00 UL 248-76AUGUST 11, 2005 NMX-J-009/248/7-2000-ANCE CSA C22.2 NO. 248.7-00 UL 248-7 7Foreword (CSA) The Canadian Standards Association (CSA) develops stand

26、ards 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 appropriateregistered CSA Marks on certain products of their man

27、ufacture 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,certification may form the basis for acceptance b

28、y 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 accordance with itsobjectives, CSA does not assume or u

29、ndertake 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 the art at the time theStandard is processed.

30、 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. Products that comply with this Standard shal

31、l 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 procedures, and instrumentation frequently must be p

32、rescribed 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 the Standard. Some tests required by CSA Standa

33、rds 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 Association, andwhether or not any equipment, f

34、acility, 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 requirements, there is an appeal procedure: the complain

35、ant 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, Bulletins, Notices, and Technical Information L

36、etters 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 Boulevard, Toronto, Ontario, Canada M9W 1R3. This pag

37、e intentionally left blank.AUGUST 11, 2005NMX-J-009/248/7-2000-ANCE CAN/CSA-C22.2 NO. 248.7-00 UL 248-78Low-Voltage Fuses Part 7: Class H Renewable Fuses1 GeneralNOTE This Part is intended to be read together with the Standard for Low-Voltage Fuses Part 1: General Requirements, hereafterreferred to

38、as Part 1. The numbering of the Clauses in this Part correspond 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, NMX-J-009/248/7-2000-ANCE CAN/CSA C2

39、2.2 No. 248.1 UL 248-1.1.1 ScopeThis Part applies to Class H Renewable fuses rated 600 A or less and either 250 or 600 V ac. DC ratingsare optional.4 ClassificationClass H Renewable fuses have an interrupting rating of 10,000 A. Each of the voltage ratings, 250 V acand 600 V ac, is divided into six

40、body sizes with the maximum current rating, In, for each size as specifiedin this Part. These fuses are not classified as current limiting. Time-delay ratings are optional.These fuses may be restored to service after operation by the replacement of the renewal element withone recommended by the manu

41、facturer.5 Characteristics5.2 Voltage ratingFor AC, the rating shall be 250 or 600 V ac in accordance with dimensions shown in Figures A and B.The DC voltage rating may be different from the AC rating.5.3 Current ratingRefer to Figures A and B for range of current ratings in each body size for each

42、voltage rating.AUGUST 11, 2005 NMX-J-009/248/7-2000-ANCE CAN/CSA-C22.2 NO. 248.7-00 UL 248-7 95.5 Interrupting ratingFor AC 10,000 AFor DC 10,000 A6 Marking6.1 Marking of fusesIn addition to the requirements in Part 1: The fuse shall be marked Renewable and with therecommended renewal element.Each r

43、enewal element shall be marked in accordance with Part 1, Clause 6.1, Items a, b, and c.g) The fuse shall not be marked Current Limiting.7 Construction7.1 DimensionsFuse dimensions are shown in Figures A and B.This is generated text for figtxt.AUGUST 1, 2000NMX-J-009/248/7-2000-ANCE CSA C22.2 NO. 24

44、8.7-00 UL 248-710This is generated text for figtxt.Figure A Dimensions of ferrule type Class H Renewable fuses in mm (in)Note: The end caps shall be capable of being removed by a tool, e.g. a screwdriver or pliers.RatingOverall length of fuseMinimum length offerruleOutside diameter offerruleVolts Cu

45、rrent In,AAaBCb2500 30 50.8 12.7 14.3(2.00) (0.50) (0.56)31 60 76.2 15.9 20.6(3.00) (0.62) (0.81)6000 30 127.0 15.9 20.6(5.00) (0.62) (0.81)31 60 139.7 15.9 27.0(5.50) (0.62) (1.06)aTolerance: 0.79 mm ( 0.031 in).bTolerance: 0.20 mm ( 0.008 in).AUGUST 11, 2005 NMX-J-009/248/7-2000-ANCE CSA C22.2 NO.

46、 248.7-00 UL 248-7 11Figure B Dimensions of knife blade type Class H Renewable fuses in mm (in)RatingOveralllength offuseMinimumlength ofbladeMinimumoveralllength ofcylindricalbodyMinimumdistancefrom mid-point of fuseto nearestlive partThicknessof bladeWidth ofbladeMaximumdimensionof capincludingpro

47、jectionsVolts Current In,A AaBbCcDdEeFfG25061 100 149.2 25.4 85.7 26.2 3.18 19.05 19.1(5.88) (1.00) (3.38) (1.03) (0.125) (0.750) (0.75)101 200 181.0 34.9 104.8 30.2 4.76 28.58 25.4(7.12) (1.38) (4.12) (1.19) (0.188) (1.125) (1.00)201 400 219.1 47.6 117.5 30.2 6.35 41.28 31.8(8.62) (1.88) (4.62) (1.

48、19) (0.250) (1.625) (1.25)401 600 263.5 57.2 131.8 38.9 6.35 50.80 38.1(10.38) (2.25) (5.19) (1.53) (0.250) (2.000) (1.50)60061 100 200.0 25.4 136.5 44.4 3.18 19.05 22.2(7.87) (1.00) (5.38) (1.75) (0.125) (0.750) (0.87)101 200 244.5 34.9 155.5 57.2 4.76 28.58 28.6(9.62) (1.38) (6.12) (2.25) (0.188)

49、(1.125) (1.13)201 400 295.3 47.6 181.0 63.5 6.35 41.28 38.1(11.62) (1.88) (7.12) (2.50) (0.250) (1.625) (1.50)401 600 339.7 57.2 208.0 68.3 6.35 50.80 44.5(13.38) (2.25) (8.18) (2.69) (0.250) (2.000) (1.75)aTolerances: 61 200 A, 1.57 mm (0.062 in); 201 600 A, 2.39 mm (0.094 in).bOne blade shall not be more than 1.57 mm (0.062 in) longer than the other blade. The effective length of the blade ismeasured from the blade end to the fuse body or other acceptable i