1、C22.2 No. 4248.6-07(reaffirmed 2016)Fuseholders Part 6: Class HLegalNoticeforStandardsCanadian Standards Association (CSA) standards are developed through a consensus standards development process approved by theStandards Council of Canada. This process brings together volunteers representing varied
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17、red to destroy them immediately. Use of thisdocument constitutes your acceptance of the terms and conditions of this Legal Notice.Update No. 2 CAN/CSA-C22.2 No. 4248.6-07 Janaury 2017Note: For information about the Standards Update Service or if you are missing any updates, go to shop.csa.ca or e-ma
18、il techsupportcsagroup.org.Title: Fuseholders Part 6: Class H originally published February 2007Revisions issued: Update No. 1 November 2007The following revisions have been formally approved and are marked by a vertical line in the margin on the attached replacement pages:Revised Title page, copyri
19、ght page, Preface, and Table 8.4ANew NoneDeleted None Update your copy by inserting these revised pages.Keep the pages you remove for reference.Association of Standardization and CertificationNMX-J-009/4248/6-ANCEFirst EditionCSA GroupCAN/CSA-C22.2 No. 4248.6-07First EditionUnderwriters Laboratories
20、 Inc.UL 4248-6First EditionFuseholders Part 6: Class HFebruary 28, 2007(Title Page Reprinted: January 13, 2017)ANSI/UL 4248-6-2007 (R2012)Approved byCommitment for AmendmentsThis standard is issued jointly by the Association of Standardization and Certification (ANCE), theCanadian Standards Associat
21、ion (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 any time. Revisions to this standard will be made only after processing according tothe standards development procedure
22、s 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 standard bearing the samedate of issue as the CSA Group and UL p
23、ages.Copyright 2017 ANCERights reserved in favor of ANCE.ISBN 1-55436-044-7 2017 CSA GroupAll rights reserved. No part of this publication may be reproduced in any form whatsoever without theprior permission of the publisher.To purchase the CSA Group Standards and related publications, visit CSA Gro
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26、 18888533503.This ANSI/UL Standard for Safety consists of the First Edition including revisions through December21, 2012.The most recent designation of ANSI/UL 4248-6 as a Reaffirmed American National Standard (ANS)occurred on December 21, 2012. ANSI approval for a standard does not include the Cove
27、r Page,Transmittal Pages, 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 time.Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative StandardsDevelopment System (CSDS) at https:/.ULs
28、 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.CONTENTSPreface .41 General 61.1 S
29、cope .64 Classification 65 Characteristics .65.1 Summary of characteristics .66 Marking .66.1 Marking of fuseholders .67 Construction .67.6 Contacts of a cartridge fuseholder .68 Tests .98.1 General 98.4 Verification of temperature rise .9FEBRUARY 28, 2007 NMX-J-009/4248/6-ANCE CSA C22.2 NO. 4248.6-
30、07 UL 4248-6 3PrefaceThis is the common ANCE, CSA Group, and UL standard for Fuseholders Part 6: Class H. It is the firstedition of NMX-J-009/4248/6-ANCE, the first edition of CSA C22.2 No. 4248-6, and the first edition of UL4248-6.This common standard was prepared by the Association of Standardizat
31、ion and Certification (ANCE),CSA Group, and Underwriters Laboratories Inc. (UL). The efforts and support of the CANENA TechnicalHarmonization Subcommittee 32B Fuseholders are gratefully appreciated.This standard is considered suitable for use for conformity assessment within the stated scope of thes
32、tandard.This standard was reviewed by the CSA Subcommittee on Low voltage fuses, under the jurisdiction of theCSA Technical Committee on Industrial Products and the CSA Strategic Steering Committee onRequirements for Electrical Safety, and has been formally approved by the CSA Technical Committee.Th
33、is standard will be submitted to the Standards Council of Canada for approval as a National Standardof Canada.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 the most recently adopted
34、 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 shall beconsidered a minimum quantity.Note: Although the intended primary application of t
35、his standard is stated in its scope, it is important to note that it remainsthe 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 Group, and UL.An identical standar
36、d is a standard that is exactly the same in technical content except for nationaldifferences resulting from conflicts in codes and governmental regulations. Presentation is word for wordexcept for editorial changes.InterpretationsThe interpretation by the standards development organization of an ide
37、ntical 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 proposed as soon as possib
38、le to each of the standards developmentorganizations to more accurately reflect the intent.JANUARY 13, 2017NMX-J-009/4248/6-ANCE CSA C22.2 NO. 4248.6-07 UL 4248-64JANUARY 13, 2017 NMX-J-009/4248/6-ANCE CSA C22.2 NO. 4248.6-07 UL 4248-6 5No Text on This PageFuseholders Part 6: Class H1 GeneralThis Pa
39、rt is intended to be read together with the Standard for Fuseholders Part 1: GeneralRequirements, hereafter referred to as Part 1. The numbering of the Clauses in this Part corresponds tolike numbered Clauses in Part 1. The requirements of Part 1 apply unless modified by this Part. ForClauses not sh
40、own below, refer to the Standard for Fuseholders Part 1: General Requirements,NMX-J-009-4248-ANCE CSA C22.2 No. 4248.1 UL 4248-1.1.1 Scope1.1.2 These requirements cover fuseholders intended for use with Class H Fuses as described inNMX-J-009/248/6-2000-ANCE, CSA C22.2 No. 248.6, UL 248-6, Low-Voltag
41、e Fuses Part 6: Class HNon-Renewable; and NMX-J-009/248/7-2000-ANCE, CSA C22.2 No. 248.7, UL 248-7, Low-VoltageFuses Part 7: Class H Renewable Fuses.4 Classification4.1 Class H fuseholders have a short-circuit withstand rating of 10,000 A. Class H fuseholders are rated250 V or 600 V, and are divided
42、 into six body sizes in each voltage rating corresponding to the Class Hfuse body sizes.5 Characteristics5.1 Summary of characteristics5.1.3 Voltage and current rating5.1.3.1 Class H fuseholders shall be rated 250 or 600 V.5.1.3.2 Class H fuseholders shall be rated 30, 60, 100, 200, 400, or 600 A .5
43、.1.4 Withstand rating5.1.4.1 Class H fuseholders shall have a short-circuit withstand rating of a 10,000 A.6 Marking6.1 Marking of fuseholders6.1.1.1 In addition to the requirements of Part 1, the fuseholder shall be marked Use Class H Fuses.7 Construction7.6 Contacts of a cartridge fuseholder7.6.1
44、The dimensions of a Class H fuseholder shall be as specified in Figure 7.6A or 7.6B, whichever isapplicable.This is generated text for figtxt.JANUARY 13, 2017NMX-J-009/4248/6-ANCE CSA C22.2 NO. 4248.6-07 UL 4248-668 Tests8.1 General8.1.1 Types of tests8.1.1.1.1 Each fuseholder shall be subjected to
45、the tests as specified in Part 1.8.4 Verification of temperature rise8.4.3 Test method8.4.3.1 With dummy fuses in place and carrying rated current continuously, the temperature on a materialor component or electrical insulation shall not exceed the values in Table 8.4B.8.4.3.2 Dummy fuses shall be u
46、nplated copper and shall conform to the dimensions in Table 8.4A.8.4.3.3 The temperatures specified in Table 8.4B are based on an assumed ambient temperature of 25C(77F). A test may be conducted at an ambient temperature within the range of 20 40C (68 104F).8.4.3.4 During a test conducted at an ambi
47、ent temperature of 25C (77F), an observed temperature shallnot exceed the required value specified in Table 8.4B.8.4.3.5 If a test is conducted at an ambient temperature other than 25C (77F), an observed temperatureshall be corrected as described in Clause 8.4.3.6. Neither a corrected temperature no
48、r an observedtemperature shall exceed the required value specified in Table 8.4B.8.4.3.6 An observed temperature shall be corrected by addition if the ambient temperature is lower than25C (77F) or subtraction (if the ambient temperature is higher than 25C) of the difference between25C and the ambien
49、t temperature.8.4.3.7 If a corrected temperature exceeds the required value specified in Table 8.4B, at the request ofthe manufacturer, the test may be repeated at an ambient temperature closer to 25C (77F).Table 8.4ADimensions of dummy fusesRating inamperesClass of fuse Shape Dimensions, mm (in)OutsidediameterWallthicknessLength Thickness Width30HTube 14.27 (0.562) 1.3 (0.051) 50.8 (2.0) 60 Tube 20.62 (0.812) 1.45 (0.057) 76.2 (3.0) 100 Blade
