ANSI CSA C22.2 NO.248.8-11-2011 Low-voltage fuses - Part 8 Class J fuses (Third Edition).pdf

《ANSI CSA C22.2 NO.248.8-11-2011 Low-voltage fuses - Part 8 Class J fuses (Third Edition).pdf》由会员分享，可在线阅读，更多相关《ANSI CSA C22.2 NO.248.8-11-2011 Low-voltage fuses - Part 8 Class J fuses (Third Edition).pdf（20页珍藏版）》请在麦多课文档分享上搜索。

1、C22.2 No. 248.8-11Low-voltage fuses Part 8: Class J fusesLegal Notice for StandardsCanadian Standards Association (CSA) standards are developed through a consensus standards development process approved by the Standards Council of Canada. This process brings together volunteers representing varied v

2、iewpoints and interests to achieve consensus and develop a standard. Although CSA administers the process and establishes rules to promote fairness in achieving consensus, it does not independently test, evaluate, or verify the content of standards.Disclaimer and exclusion of liabilityThis document

3、is provided without any representations, warranties, or conditions of any kind, express or implied, including, without limitation, implied warranties or conditions concerning this documents fitness for a particular purpose or use, its merchantability, or its non-infringement of any third partys inte

4、llectual property rights. CSA does not warrant the accuracy, completeness, or currency of any of the information published in this document. CSA makes no representations or warranties regarding this documents compliance with any applicable statute, rule, or regulation. IN NO EVENT SHALL CSA, ITS VOL

5、UNTEERS, MEMBERS, SUBSIDIARIES, OR AFFILIATED COMPANIES, OR THEIR EMPLOYEES, DIRECTORS, OR OFFICERS, BE LIABLE FOR ANY DIRECT, INDIRECT, OR INCIDENTAL DAMAGES, INJURY, LOSS, COSTS, OR EXPENSES, HOWSOEVER CAUSED, INCLUDING BUT NOT LIMITED TO SPECIAL OR CONSEQUENTIAL DAMAGES, LOST REVENUE, BUSINESS IN

6、TERRUPTION, LOST OR DAMAGED DATA, OR ANY OTHER COMMERCIAL OR ECONOMIC LOSS, WHETHER BASED IN CONTRACT, TORT (INCLUDING NEGLIGENCE), OR ANY OTHER THEORY OF LIABILITY, ARISING OUT OF OR RESULTING FROM ACCESS TO OR POSSESSION OR USE OF THIS DOCUMENT, EVEN IF CSA HAS BEEN ADVISED OF THE POSSIBILITY OF S

7、UCH DAMAGES, INJURY, LOSS, COSTS, OR EXPENSES.In publishing and making this document available, CSA is not undertaking to render professional or other services for or on behalf of any person or entity or to perform any duty owed by any person or entity to another person or entity. The information in

8、 this document is directed to those who have the appropriate degree of experience to use and apply its contents, and CSA accepts no responsibility whatsoever arising in any way from any and all use of or reliance on the information contained in this document. CSA is a private not-for-profit company

9、that publishes voluntary standards and related documents. CSA has no power, nor does it undertake, to enforce compliance with the contents of the standards or other documents it publishes. Intellectual property rights and ownershipAs between CSA and the users of this document (whether it be in print

10、ed or electronic form), CSA is the owner, or the authorized licensee, of all works contained herein that are protected by copyright, all trade-marks (except as otherwise noted to the contrary), and all inventions and trade secrets that may be contained in this document, whether or not such invention

11、s and trade secrets are protected by patents and applications for patents. Without limitation, the unauthorized use, modification, copying, or disclosure of this document may violate laws that protect CSAs and/or others intellectual property and may give rise to a right in CSA and/or others to seek

12、legal redress for such use, modification, copying, or disclosure. To the extent permitted by licence or by law, CSA reserves all intellectual property rights in this document.Patent rightsAttention is drawn to the possibility that some of the elements of this standard may be the subject of patent ri

13、ghts. CSA shall not be held responsible for identifying any or all such patent rights. Users of this standard are expressly advised that determination of the validity of any such patent rights is entirely their own responsibility.Authorized use of this documentThis document is being provided by CSA

14、for informational and non-commercial use only. The user of this document is authorized to do only the following:If this document is in electronic form:.load this document onto a computer for the sole purpose of reviewing it;.search and browse this document; and.print this document if it is in PDF fo

15、rmat. Limited copies of this document in print or paper form may be distributed only to persons who are authorized by CSA to have such copies, and only if this Legal Notice appears on each such copy.In addition, users may not and may not permit others to.alter this document in any way or remove this

16、 Legal Notice from the attached standard;.sell this document without authorization from CSA; or.make an electronic copy of this document.If you do not agree with any of the terms and conditions contained in this Legal Notice, you may not load or use this document or make any copies of the contents h

17、ereof, and if you do make such copies, you are required to destroy them immediately. Use of this document constitutes your acceptance of the terms and conditions of this Legal Notice.CSA Standards Update ServiceC22.2 No. 248.8-11May 2011Title:Low-voltage fuses Part 8: Class J fusesPagination:12 page

18、s, each dated May 2011To register for e-mail notification about any updates to this publicationgo to www.ShopCSA.caclick on E-mail Services under MY ACCOUNTclick on CSA Standards Update ServiceThe List ID that you will need to register for updates to this publication is 2421214.If you require assist

19、ance, please e-mail techsupportcsa.ca or call 416-747-2233.Visit CSAs policy on privacy at www.csagroup.org/legal to find out how we protect your personal information.Association of Standardization and CertificationNMX-J-009/248/8-ANCESecond EditionCanadian Standards AssociationCSA C22.2 No. 248.8-1

20、1Third EditionUnderwriters Laboratories Inc.UL 248-8Third EditionLow-Voltage Fuses Part 8: Class J FusesMay 13, 2011ANSI/UL 248-8-2011Commitment for AmendmentsThis standard is issued jointly by the Association of Standardization and Certification (ANCE), theCanadian Standards Association (CSA), and

21、Underwriters Laboratories Inc. (UL). Comments orproposals for revisions on any part of the standard may be submitted to ANCE, CSA, or UL at anytime.Revisions to this standard will be made only after processing according to the standards developmentprocedures of ANCE, CSA, and UL. CSA and UL will iss

22、ue revisions to this standard by means of anew edition or revised or additional pages bearing their date of issue. ANCE will incorporate the samerevisions into a new edition of the standard bearing the same date of issue as the CSA and UL pages.Copyright 2011Rights reserved in favor of ANCE.ISBN 978

23、-1-55491-639-9 2011 Canadian Standards AssociationAll rights reserved. No part of this publication may be reproduced in any form whatsoever without theprior permission of the publisher.CSA Standards are subject to periodic review, and suggestions for their improvement will be referredto the appropri

24、ate committee. To submit a proposal for change to CSA Standards, please send thefollowing information to inquirescsa.ca and include Proposal for change in the subject line:Standard designation (number); relevant clause, table, and/or figure number; wording of the proposedchange; and rationale for th

25、e change.To purchase CSA Standards and related publications, visit CSAs Online Store at www.ShopCSA.ca orcall toll-free 1-800-463-6727 or 416-747-4044.Copyright 2011 Underwriters Laboratories Inc.ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standardshoul

26、d be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regardingthose Standards shall remain the sole and exclusive property of UL.This ANSI/UL Standard for Safety consists of the Third Edition including revisions through May 13,2011. The most recent designation of

27、ANSI/UL 248-8 as an American National Standard (ANSI)occurred on May 13, 2011. ANSI approval for a standard does not include the Cover Page, TransmittalPages, Title Page (front and back), or the Preface.Comments or proposals for revisions on any part of the Standard may be submitted to UL at any tim

28、e.Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative StandardsDevelopment System (CSDS) at http:/.To purchase UL Standards, visit Comm 2000 at http:/m- call toll-free 1-888-853-3503.CONTENTSPreface .41 General 61.1 Scope .64 Classification .65 Characteristics 65.2 Volt

29、age rating 65.3 Current rating 65.5 Interrupting rating .65.6 Peak let-through current and clearing I2t characteristics .77 Construction 87.1 Dimensions 88 Tests .108.2 Verification of temperature rise and current-carrying capacity .108.4 Verification of operation at rated voltage .118.5 Verificatio

30、n of peak let-through current and clearing I2t characteristics .12MAY 13, 2011 NMX-J-009/248/8-ANCE CSA C22.2 NO. 248.8-11 UL 248-8 3PrefaceThis is the harmonized ANCE, CSA, and UL standard for Low-Voltage Fuses Part 8: Class J Fuses. Itis the second edition of NMX-J-009/248/8-ANCE, the third editio

31、n of CSA C22.2 No. 248.8-11, and thethird edition of UL 248-8. This edition of NMX-J-009-248/8-ANCE cancels the previous edition publishedin 2000. This edition of CSA C22.2 No. 248.8-11 supersedes the previous edition published in 2000.This harmonized standard was prepared by the Association of Stan

32、dardization and Certification (ANCE),the Canadian Standards Association (CSA), and Underwriters Laboratories Inc., (UL).This Standard is considered suitable for use for conformity assessment within the stated scope of theStandard.The present Mexican Standard was developed by the CT 32 from the Comit

33、e de Normalizacion de laAsociacion 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 Fuseholders, under the jurisdictionof the CSA Technical Committee on Industrial Products and t

34、he CSA Strategic Steering Committee onRequirements for Electrical Safety, and has been formally approved by the CSA Technical Committee.This standard has been approved by the American National Standards Institute (ANSI) as an AmericanNational Standard.A UL standard is current only if it incorporates

35、 the most recently adopted revisions, all of which areitemized on the transmittal notice that accompanies the latest set of revised requirements.Where reference is made to a specific number of samples to be tested, the specified number is to beconsidered a minimum quantity.Note: Although the intende

36、d primary application of this standard is stated in its scope, it is important to note thatit remains the responsibility of the users of the standard to judge its suitability for their particular purpose.Level of HarmonizationThis standard is published as an identical standard for ANCE, CSA, and UL.

37、 An identical standard is astandard that is exactly the same in technical content except for national differences resulting fromconflicts in codes and governmental regulations. Presentation is word for word except for editorialchanges.InterpretationsThe interpretation by the standards development or

38、ganization of an identical or equivalent standard isbased on the literal text to determine compliance with the standard in accordance with the proceduralrules of the standards development organization. If more than one interpretation of the literal text has beenidentified, a revision is to be propos

39、ed as soon as possible to each of the standards developmentorganizations to more accurately reflect the intent.ANCE Effective DateThe effective date for ANCE will be announced through the Diario Oficial de la Federacin (OfficialGazette) and is indicated on the cover page.MAY 13, 2011NMX-J-009/248/8-

40、ANCE CSA C22.2 NO. 248.8-11 UL 248-84CSA Effective DateThe effective date for CSA International will be announced through CSA Informs or a CSA certificationnotice.UL Effective DateAs of May 13, 2011 all products Listed or Recognized by UL must comply with the requirements in thisstandard.A UL effect

41、ive date is one established by Underwriters Laboratories Inc. and is not part of the ANSIapproved standard.MAY 13, 2011 NMX-J-009/248/8-ANCE CSA C22.2 NO. 248.8-11 UL 248-8 5Low-Voltage Fuses Part 8: Class J fuses1 GeneralNOTE This Part is intended to be read together with the Standard for Low-Volta

42、ge Fuses Part 1: General Requirements,hereafter referred to as Part 1. The numbering of the Clauses in this Part corresponds to like numbered Clauses in Part1. The requirements of Part 1 apply unless modified by this Part. For Clauses not shown below, refer to the Standard forLow-Voltage Fuses Part

43、1: General Requirements, NMX-J-009/248/1-ANCE CAN/CSA C22.2 No. 248.1-11 UL248-1.1.1 ScopeThis Part applies to Class J fuses rated 600 A or less and 600 V ac. DC ratings are optional.4 ClassificationClass J Fuses are non-renewable and current-limiting with an interrupting rating of 200,000 A. Class

44、Jfuses are divided into six body sizes with the maximum current rating Infor each size specified in this Part.Time-delay ratings are optional.5 Characteristics5.2 Voltage ratingFor AC, the rating shall be 600 V ac.The DC voltage rating may be different from the AC rating.5.3 Current ratingRefer to F

45、igure A for range of current ratings in each body size.5.5 Interrupting ratingFor AC, 200,000 A, or 300,000 A at the manufacturers option (300,000 A not applicable in Mexico).For DC, the preferred ratings are 10,000, 20,000, 50,000, 100,000, 150,000, 200,000, or 300,000 A.MAY 13, 2011NMX-J-009/248/8

46、-ANCE CSA C22.2 NO. 248.8-11 UL 248-865.6 Peak let-through current and clearing I2t characteristicsMaximum values of peak let-through current and clearing I2t are given in Table A (see 8.5.3). Peaklet-through currents shall not exceed the levels defined by the appropriate Let Through Function specif

47、iedin Table A, as verified through measurement of peak let-through currents at 50, 100, 200, and, ifapplicable, 300 kA. Clearing I2t values recorded shall not exceed the limits specified in Table A as verifiedthrough measurement of clearing I2t values at 50, 100, 200, and, if applicable, 300 kA.Tabl

48、e A Maximum peak let-through current and clearing I2t for Class J fusesCurrentrating In,ABetween thresholdand 50 kAAt 100 kA At 200 kA At 300 kA, ifapplicablePeakLet-ThroughFunctionPeaklet-throughcurrent, AI2t,ampere-squaredsecondsPeaklet-throughcurrent, AI2t,ampere-squaredsecondsPeaklet-throughcurr

49、ent, AI2t,ampere-squaredsecondsPeaklet-throughcurrent, AI2t,ampere-squaredseconds1 1,000 8003 1,500 1,2006 2,300 2,00010 3,300 3,00015 4,000 4,00020 5,000 5,00025 6,000 5,50030 6,000 7,000 7,500 7,000 12,000 7,000 18,500 8,400 Y =1E-07x2+0.015x +500035 7,500 12,00040 8,000 17,00045 8,500 18,00050 9,000 22,00060 8,000 30,000 10,000 30,000 16,000 30,000 24,367 36,000 Y =1E-07x2+0.02x +6666.770 11,500 50,00080 12,500 60,00090 13,500 75,000100 12,000 60,000 14,000 80,000 20,000 80,000