1、Low-Voltage Fuses Part 9: Class K FusesAugust 1, 2000CSA InternationalCSA C22.2 No. 248.9-00Second EditionUnderwriters LaboratoriesInc.UL 248-9Second EditionNational Association ofStandardization andCertification of the ElectricalSectorNMX-J-009/248/9-2000-ANCEFirst EditionCommitment for AmendmentsT
2、his 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 procedur
3、es 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 of
4、 revised requirements.Copyright 2000ANCERights reserved in favorof ANCEISBN 1-55324-242-4Copyright 2000CSA InternationalAll rights reserved. Nopart of this publicationmay be reproduced inany form whatsoeverwithout the priorpermission of thepublisher.ISBN 0-7629-0559-XCopyright 1996,2000UnderwritersL
5、aboratories Inc.Update No. 3CAN/CSA-C22.2 No. 248.9-00August 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 9: Class K
6、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 attached
7、replacement pages:Revised Title page, copyright page, Contents, Preface, and Clauses 1, 4, 6.1, 8.2.4, and 8.4New Clause 9Deleted Foreword (ANCE) and Foreword (UL)CAN/CSA-C22.2 No. 248.9-00 originally consisted of 16 pages, each dated August 2000. It now consists of the following pages:August 2000 1
8、2 and 13November 2004 CoverAugust 2005 110, 11, and 1416Update your copy by inserting these revised pages.Keep the pages you remove for reference.Low-Voltage Fuses Part 9: Class K FusesAugust 1, 2000(Title Page Reprinted: August 11, 2005)Canadian StandardsAssociationCAN/CSA-C22.2 No. 248.9-00Second
9、EditionUnderwriters LaboratoriesInc.UL 248-9Second EditionANSI/UL 248-9-2005National Association ofStandardization andCertification of the ElectricalSectorNMX-J-009/248/9-2000-ANCEFirst EditionCommitment for AmendmentsThis Standard is issued jointly by the National Association of Standardization and
10、Certification 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 revised
11、 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 ANCEISBN
12、 1-55324-242-4Copyright 2000Canadian StandardsAssociationAll rights reserved. Nopart of this publicationmay be reproduced inany form whatsoeverwithout the priorpermission of thepublisher.ISBN 0-7629-0559-XCopyright 1996,2005UnderwritersLaboratories Inc.CONTENTSPreface .41 General 91.1 Scope .94 Clas
13、sification .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 .116.1 Marking of fuses 117 Construction .117.1 Dimensions .118 Tests .148.2 Verification of temperature rise and current-carryi
14、ng capacity .148.3 Verification of overload operation 148.4 Verification of operation at rated voltage .158.5 Verification of peak let-through current and clearing I2t characteristics .159 Special Tests 159.1 General 159.2 Verification of low melting point P (D for time delay) characteristic .16AUGU
15、ST 11, 2005 NMX-J-009/248/9-2000-ANCE CAN/CSA-C22.2 NO. 248.9-00 UL 248-9 3PrefaceThis is the common UL, CSA, and ANCE Standard for Low-Voltage Fuses Part 9: Class K Fuses. Thisis the second edition of CAN/CSA-C22.2 No. 248.9-00 (superseding the first edition, published in 1996),the second edition o
16、f UL 248-9, and the first edition of NMX-J-009/248/9-2000-ANCE.This Standard was prepared by a Technical Harmonization Committee comprised of members fromUnderwriters Laboratories, CSA International, the National Association of Standardization andCertification of the Electrical Sector, the end produ
17、ct 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 the Comite de Normalizacion dela Asociacion de Normalizacion y Certificacion, A.C.,
18、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 the CSA Strategic Steering Committee on theRequirements for Electrical Safety.This St
19、andard has been approved by the American National Standards Institute (ANSI) as an AmericanNational Standard.The most recent designation of ANSI/UL 248-9 as an American National Standard (ANSI) occurred onAugust 1, 2005.This ANSI/UL Standard for Safety, which consists of the Second edition with revi
20、sions 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 time.Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative
21、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 Standard to judge its suitability for their particular purpose.Level of HarmonizationThi
22、s 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 for word except for editorial changes.InterpretationsThe interpretation by the SDO (S
23、tandards 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 interpretation of the literal text has been identified, a revision shall beproposed as soon as p
24、ossible 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 the cover page.AUGUST 11, 2005NMX-J-009/248/9-2000-ANCE CAN/CSA-C22.2 NO. 248.9-00 UL 2
25、48-94CSA 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-009/248/9-2000-ANCE CAN/CSA-C22.2 NO. 248.9-00 UL 248-9 5This page intentionally left blank.AUGUST
26、11, 2005NMX-J-009/248/9-2000-ANCE CAN/CSA-C22.2 NO. 248.9-00 UL 248-96AUGUST 11, 2005 NMX-J-009/248/9-2000-ANCE CSA C22.2 NO. 248.9-00 UL 248-9 7Foreword (CSA) The Canadian Standards Association (CSA) develops standards under the name Canadian StandardsAssociation, and provides certification and tes
27、ting 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 manufacture to indicate conformity with CSA Standards. CSA Certification for a number of
28、 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 by inspection authorities responsible for enforcement ofregulations. Where feasible, p
29、rograms 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 undertake to discharge any responsibility of the manufacturer or anyother party. The o
30、pinions 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. Products in substantial accord with this Standard but which exhibit a minor differen
31、ce 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 shall not becertified if they are found to have additional features which are inconsisten
32、t 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 prescribed by CSAInternational in addition to the technical requirements contained in
33、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 Standards may be inherently hazardous. The Association neither assumesnor accepts any respo
34、nsibility 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, facility, or personnel for or in connection with the test is furnished by themanufactu
35、rer 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 complainant should submit thematter, in writing, to the Secretary of the Canadian Standards A
36、ssociation. 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 Letters thatmay be applicable and for which there may be a nominal charge. For such in
37、formation 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 page intentionally left blank.AUGUST 11, 2005NMX-J-009/248/9-2000-ANCE CAN/CSA-C22.2 NO.
38、 248.9-00 UL 248-98Low-Voltage Fuses Part 9: Class K Fuses1 GeneralNOTE This Part is intended 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 correspond to like numbered Clauses in Par
39、t 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-009/248/9-2000-ANCE CAN/CSA C22.2 No. 248.1 UL 248-1.1.1 ScopeThis Part applies to Class K fuses rated 600 A or less and eith
40、er 250 or 600 V ac. DC ratings are optional.4 ClassificationClass K fuses are non-renewable, with interrupting ratings of 50,000, 100,000, or 200,000 A. Class Kfuses are divided into sub-classes K-1, K-5, and K-9 which are physically interchangeable with each other(and Class H fuses) for the same cu
41、rrent and voltage ratings. Each sub-class has specified limits of peaklet-through current and clearing I2t characteristics. K-1 has the lowest limits (most current-limiting), K-5higher, and K-9 highest. Each of the voltage ratings, 250 and 600 V ac, is divided into six body sizes. Themaximum current
42、 rating, In, for each size is specified in this Part. Time-delay ratings are optional.In Canada, 250V ac fuses rated 15 60 A shall have a low melting point P (D for time delay)characteristic. See sub-clauses 6.1 and 9.2.5 Characteristics5.2 Voltage ratingFor AC, the rating shall be 250 or 600 V ac i
43、n accordance with dimensions shown in Figure A. The DCvoltage 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 voltage rating.AUGUST 11, 2005 NMX-J-009/248/9-2000-ANCE CAN/CSA-C22.2 NO. 248.9-00 UL 248-9 95.
44、5 Interrupting ratingFor AC 50,000, 100,000, or 200,000 AFor DC, the preferred ratings are 10,000, 20,000, 50,000, 100,000, 150,000, or 200,000 A.5.6 Peak let-through current and clearing I2t characteristicsMaximum values of peak let-through current and clearing I2t for 250 and 600 V ac, Class K-1,
45、Class K-5,and Class K-9 fuses are given in Tables A and B.Table A Maximum peak let-through current and clearing I2t for 250 and 600 V ac Class Kfuses at 50 and 100 kAClass Current rating In,APeak let-through current,AI2t, ampere-squared secondsK-10 30 10,000 10,00031 60 12,000 40,00061 100 16,000 10
46、0,000101 200 22,000 400,000201 400 35,000 1,200,000401 600 50,000 3,000,000K-50 30 11,000 50,00031 60 21,000 200,00061 100 25,000 500,000101 200 40,000 1,600,000201 400 60,000 5,000,000401 600 80,000 10,000,000K-90 30 14,000 50,00031 60 28,000 250,00061 100 35,000 650,000101 200 60,000 3,500,000201
47、400 80,000 15,000,000401 600 130,000 40,000,000AUGUST 11, 2005NMX-J-009/248/9-2000-ANCE CAN/CSA-C22.2 NO. 248.9-00 UL 248-910Table B Maximum peak let-through current and clearing I2t for 250 and 600 V ac Class Kfuses at 200 kAClass Current rating In,APeak let-through current,AI2t, ampere-squared sec
48、ondsK-10 30 12,000 11,00031 60 16,000 50,00061 100 20,000 100,000101 200 30,000 400,000201 400 50,000 1,600,000401 600 70,000 4,000,000K-50 30 14,000 50,00031 60 26,000 200,00061 100 32,000 500,000101 200 50,000 2,000,000201 400 75,000 6,000,000401 600 100,000 12,000,000AUGUST 11, 2005 NMX-J-009/248
49、/9-2000-ANCE CAN/CSA-C22.2 NO. 248.9-00 UL 248-9 10ATable B Maximum peak let-through current and clearing I2t for 250 and 600 V ac Class K fuses at 200kA Continued on Next PageAUGUST 11, 2005NMX-J-009/248/9-2000-ANCE CAN/CSA-C22.2 NO. 248.9-00 UL 248-910BNo Text on This PageTable B Maximum peak let-through current and clearing I2t for 250 and 600 V ac Class Kfuses at 200 kA ContinuedClass Current rating In,APeak let-through curr
