ANSI CSA C22.2 NO.248.1-11-2011 Low-voltage fuses - Part 1 General requirements (Third Edition Update No 1 August 2011 Update No 2 May 2017).pdf

1、C22.2 No. 248.1-11Low-voltage fuses Part 1: General requirementsLegal 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 v

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17、tents hereof, 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.Update No. 2 C22.2 No. 248.1-11 May 2017Note: For information about the Standards Update Service or if you are

18、 missing any updates, go to shop.csa.ca or e-mail techsupportcsagroup.org.Title: Low-voltage fuses Part 1: General requirements originally published May 2011 Revisions issued: Update No. 1 August 2011The following revisions have been formally approved and are marked by a vertical line in the margin

19、on the attached replacement pages:Revised Cover, copyright page, Preface, and Tables 5 and 6New NoneDeleted None Update your copy by inserting these revised pages.Keep the pages you remove for reference.Association of Standardization and CertificationNMX-J-009/248/1-ANCESecond EditionCanadian Standa

20、rds AssociationCSA C22.2 No. 248.1-11Third EditionUnderwriters Laboratories Inc.UL 248-1Third EditionLow-Voltage Fuses Part 1: General RequirementsMay 13, 2011(Title Page Reprinted: June 16, 2017)ANSI/UL 248-1-2017Commitment for AmendmentsThis standard is issued jointly by the Association of Standar

21、dization and Certification (ANCE), theCanadian Standards Association (operating as “CSA Group”), and Underwriters Laboratories Inc. (UL).Comments or proposals for revisions on any part of the standard may be submitted to ANCE, CSAGroup, or UL at anytime. Revisions to this standard will be made only

22、after processing according to thestandards development procedures of ANCE, CSA Group, and UL. CSA Group and UL will issuerevisions to this standard by means of a new edition or revised or additional pages bearing their dateof issue. ANCE will incorporate the same revisions into a new edition of the

23、standard bearing the samedate of issue as the CSA Group and UL pages.Copyright 2017 ANCERights reserved in favor of ANCE.ISBN 978-1-55491-642-9 2017 CSA GroupAll rights reserved. No part of this publication may be reproduced in any form whatsoever without theprior permission of the publisher.This St

24、andard is subject to review five years from the date of publication, and suggestions for itsimprovement will be referred to the appropriate committee. To submit a proposal for change, pleasesend the following information to inquirescsagroup.org and include Proposal for change in thesubject line: Sta

25、ndard designation (number); relevant clause, table, and/or figure number; wording ofthe proposed change; and rationale for the change.To purchase CSA Group Standards and related publications, visit CSA Groups Online Store atshop.csa.ca or call toll-free 1-800-463-6727 or 416-747-4044.Copyright 2017

26、Underwriters Laboratories Inc.ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standardshould 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.T

27、his ANSI/UL Standard for Safety consists of the Third Edition including revisions through June 16,2017. The most recent designation of ANSI/UL 248-1 as an American National Standard (ANSI)occurred on June 16, 2017. ANSI approval for a standard does not include the Cover Page, TransmittalPages, Title

28、 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 time.Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative StandardsDevelopment System (CSDS) at https:/.To purchase UL Standards, visit UL

29、s Standards Sales Site at http:/ or call toll-free 1-888-853-3503.PrefaceThis is the harmonized ANCE, CSA, and UL standard for Low-Voltage Fuses Part 1: GeneralRequirements. It is the second edition of NMX-J-009/248/1-ANCE, the third edition of CSA C22.2 No.248.1-11, and the third edition of UL 248-

30、1. This edition of NMX-J-009-248/1-ANCE cancels the previousedition published in 2000. This edition of CSA C22.2 No. 248.1-11 supersedes the previous editionpublished in 2000.This harmonized standard was prepared by the Association of Standardization and Certification, (ANCE),CSA Group and Underwrit

31、ers 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 Comite de Normalizacion de laAsociacion de Normalizacion y Certificacion, A.C., CONANCE, with the

32、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 the CSA Strategic Steering Committee onRequirements for Electrical Safety, and has been formal

33、ly approved by the CSA Technical Committee.This standard has been approved by the American National Standards Institute (ANSI) as an AmericanNational Standard.Application of StandardWhere reference is made to a specific number of samples to be tested, the specified number is to beconsidered a minimu

34、m quantity.Note: Although the intended 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 iden

35、tical standard for ANCE, CSA Group and UL. An identical standardis a standard 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 inte

36、rpretation by the standards development organization 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

37、beenidentified, a revision is to be proposed as soon as possible to each of the standards developmentorganizations to more accurately reflect the intent.JUNE 16, 2017 NMX-J-009/248/1-ANCE CSA C22.2 NO. 248.1-11 UL 248-1 5JUNE 16, 2017NMX-J-009/248/1-ANCE CSA C22.2 NO. 248.1-11 UL 248-16No Text on Th

38、is Page8.4.2.1 For AC circuitsThe tests shall be made at a frequency of 48 62 Hz.The inductors shall be air core type. Inductors may be series or parallel connected and resistors may alsobe series or parallel connected, but inductors and resistors may not be parallel connected.The peak value of powe

39、r frequency recovery voltage from the first full half cycle after clearing and for thenext three successive peaks shall correspond to the peak value pertaining to the rms value specified inTable 5.Table 5 Verification of operation at rated voltage for ACTest HighcurrentMaximumenergyThresholdratioInt

40、ermediate current Low currentTest No. 1 2 3 4a 4b 4c 5a 5bCurrent200 kA or300 kAg,ifapplicable a b 100 kA 50 kA 10 kA 3 In2InTolerance + 10percent - 0percentNotapplicable +10percent-0percent +20percent-0percentPower factor 0.2 max. 0.45 to 0.5 0.8 max.Arcing anglec60 90 Not specified 60 90 Random cl

41、osing No oscillographicrecords requiredClosing angle Not specified 80 90 Not specifiedRecoveryvoltagedRated voltage+5percent, - 0 percent Rated +20 percent voltage -0 percentDuration ofrecoveryvoltage30 s minimum Not specified 30 s minimum 60 s minimumMaximum arcvoltage3000 VPre-conditionedef e e eY

42、es Yes Optional Yes No OptionalaOnly required if less than the assigned interrupting rating of the fuse.For maximum energy tests the available current is to be adjusted such that the peak current at interruption is 70 100 percent ofthe peak value of the rms current. This test is not required for rat

43、ings of less than 30 A, if they employ the same filler as the 30 Afuses.Fusesrated1Aorless,thatdonotemploy a filler, are represented by the 30 A rating.bTest current shall be equal to or less than the product of the fuse rating in A times the threshold ratio (TR), specified for the fuseunder test.cI

44、f start of arcing cannot be obtained, then test at closing angle essentially at zero.dThe recovery voltage may exceed +5 percent with the manufacturers agreement.eEachfuseistobetestedwithin1hofremoval from a 90 3C oven after at least 24 h of conditioning.Exception: Oven conditioning is not required

45、on fuses with tubing material of glass, ceramic, melamine impregnated glass fiber, orequivalent non-hygroscopic material, when the fuse employs a sand filler or no filler.fThefuseistobetestedwithin1hofremoval from a humidity cabinet, after conditioning at room temperature 25C and 90 100percent relat

46、ive humidity for 5 d.g300 kA if permitted in subsequent parts.JUNE 16, 2017 NMX-J-009/248/1-ANCE CSA C22.2 NO. 248.1-11 UL 248-1 238.4.2.2 For DC testsThe tests shall be made with DC in an inductive circuit with series resistance for the adjustment ofavailable current. The inductors may be series an

47、d parallel connected, and may be iron cored, providedthey do not saturate during the test.Time constants shall be as specified in Table 6 or in the relevant subsequent Parts.The mean value of the DC recovery voltage during the 100 ms after final arc extinction shall not be lessthan the value specifi

48、ed in Table 6 or the relevant subsequent Parts.Table 6 Verification of operation at rated voltage for DCTest High current Maximum energy Low currentTest No. 1 2 5a 5b 5cCurrent 10 kAa9In3In2InTolerance+ 10 percentNot Applicable+ 20 percent 0 percent 0 percentTime constant 10 ms 0.5( Itest)0.3msbReco

49、very voltageRated voltage + 5 percent Rated + 20 percent 0 percent voltage 0 percentDuration ofrecovery voltage30 s minimum Not specified 60 s minimumPre-conditionedcd cOptional Yes OptionalaOnly required if less than the assigned interrupting rating of the fuse.For maximum energy tests, the peak current shall be between 0.6 and 0.8 of the available current. The circuit shall be adjustedto obtain this result. This test is not required for ratings of less than