UL 4248-4-2007 UL Standard for Safety Fuseholders C Part 4 Class CC (First Edition Reprint with Revisions Through and Including April 4 2018)《熔断器支持件 第4部分 CC级》.pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 4248-4 Fuseholders Part 4: Class CCUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHE

2、R REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Fuseholders Part 4: Class CC, UL 4248-4 First Edition, Dated February 28, 2007 Summary of Topics This revision to ANSI/UL 4248-4 is being issued to update the UL approval date per a UL Standards reaffirmation of ANS

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9、PERSEDED REQUIREMENTS notice. DECEMBER 21, 2012 UL 4248-4 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 21, 2012 UL 4248-4 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION

10、WITHOUT PERMISSION FROM UL Association of Standardization and Certication NMX-J-009/4248/4-ANCE First Edition CSA Group CSA C22.2 No. 4248.4-07 First Edition Underwriters Laboratories Inc. UL 4248-4 First Edition Fuseholders Part 4: Class CC February 28, 2007 (Title Page Reprinted: December 21, 2012

11、) ANSI/UL 4248-4-2007 (R2012)UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Commitment for Amendments This standard is issued jointly by the Association of Standardization and Certication (ANCE), the Canadian Standards Association (operatin

12、g as “CSA Group”), and Underwriters Laboratories Inc. (UL). Comments or proposals for revisions on any part of the standard may be submitted to ANCE, CSA Group, or UL at any time. Revisions to this standard will be made only after processing according to the standards development procedures of ANCE,

13、 CSA Group, and UL. CSA Group and UL will issue revisions to this standard by means of a new edition or revised or additional pages bearing their date of issue. ANCE will incorporate the same revisions into a new edition of the standard bearing the same date of issue as the CSA Group and UL pages. C

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17、oll free 1-888-853-3503. This ANSI/UL Standard for Safety consists of the First Edition including revisions through December 21, 2012. The most recent designation of ANSI/UL 4248-4 as a Reaffirmed American National Standard (ANS) occurred on December 21, 2012. ANSI approval for a standard does not i

18、nclude the Cover 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 Standards Development System (C

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20、D MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS Preface .4 1 General 6 1.1 Scope .6 4 Classication .6 5 Characteristics 6 5.1 Summary of characteristics 6 6 Marking 6 6.1 Marking of fuseholders 6 7 Construction 7 7.6 Contacts of a cartridge fuse

21、holder 7 8 Tests 9 8.1 General .9 8.4 Verication of temperature rise .9 8.6A Verication of effectiveness of rejection member .11 FEBRUARY 28, 2007 NMX-J-009/4248/4-ANCE CSA C22.2 NO. 4248.4-07 UL 4248-4 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSI

22、ON FROM UL Preface This is the common ANCE, CSA Group, and UL standard for Fuseholders Part 4: Class CC . It is the rst edition of NMX-J-009/4248/4-ANCE, the rst edition of CSA C22.2 No. 4248-4, and the rst edition of UL 4248-4. This common standard was prepared by the Association of Standardization

23、 and Certication (ANCE), CSA Group, and Underwriters Laboratories Inc. (UL). The efforts and support of the CANENA Technical Harmonization Subcommittee 32B Fuseholders are gratefully appreciated. This standard is considered suitable for use for conformity assessment within the stated scope of the st

24、andard. This standard was reviewed by the CSA Subcommittee on Low voltage fuses, under the jurisdiction of the CSA Technical Committee on Industrial Products and the CSA Strategic Steering Committee on Requirements for Electrical Safety, and has been formally approved by the CSA Technical Committee.

25、 This standard will be submitted to the Standards Council of Canada for approval as a National Standard of Canada. This standard has been approved by the American National Standards Institute (ANSI) as an American National Standard. A UL standard is current only if it incorporates the most recently

26、adopted revisions, all of which are itemized on the transmittal notice that accompanies the latest set of revised requirements. Where reference is made to a specic number of samples to be tested, the specied number shall be considered a minimum quantity. Note: Although the intended primary applicati

27、on of this standard is stated in its scope, it is important to note that it remains the responsibility of the users of the standard to judge its suitability for their particular purpose. Level of harmonization This standard is published as an identical standard for ANCE, CSA Group, and UL. An identi

28、cal standard is a standard that is exactly the same in technical content except for national differences resulting from conicts in codes and governmental regulations. Presentation is word for word except for editorial changes. Interpretations The interpretation by the standards development organizat

29、ion of an identical or equivalent standard is based on the literal text to determine compliance with the standard in accordance with the procedural rules of the standards development organization. If more than one interpretation of the literal text has been identied, a revision is to be proposed as

30、soon as possible to each of the standards development organizations to more accurately reect the intent. ANCE effective date The effective date for ANCE will be announced through the Diario Ocial de Ia Federacin (Official Gazette) and is indicated on the cover page. DECEMBER 21, 2012 NMX-J-009/4248/

31、4-ANCE CSA C22.2 NO. 4248.4-07 UL 4248-4 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CSA Group effective date The effective date for CSA Group will be announced through CSA Informs or a CSA Group certication notice. UL effective date As

32、 of November 2, 2009 all products Listed or Recognized by UL must comply with the requirements in this standard. Between February 28, 2007 and November 2, 2009, new product submittals to UL may be evaluated under all requirements in this standard or, if requested in writing, evaluated under presentl

33、y effective requirements only. The presently effective requirements are contained in the tenth edition of UL 512. A UL effective date is one established by Underwriters Laboratories Inc. and is not part of the ANSI approved standard. DECEMBER 21, 2012 NMX-J-009/4248/4-ANCE CSA C22.2 NO. 4248.4-07 UL

34、 4248-4 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Fuseholders Part 4: Class CC 1 General This Part is intended to be read together with the Standard for Fuseholders, Part 1: General Requirements, hereafter referred to as Part 1. The n

35、umbering of the Clauses in this Part corresponds to like numbered Clauses in Part 1. The requirements of Part 1 apply unless modied by this Part. For Clauses not shown 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 S

36、cope 1.1.2 These requirements cover fuseholders intended for use with Class CC Fuses as described in NMX-J-009/248/4-2000-ANCE, CSA C22.2 No. 248.4, UL 248-4, Low-Voltage Fuses Part 4: Class CC Fuses. 4 Classication 4.1 Class CC fuseholders have a short-circuit withstand rating of 200,000 A. Class C

37、C fuseholders are rated 600 V, and have one body size corresponding to the Class CC fuse body size. 5 Characteristics 5.1 Summary of characteristics 5.1.3 Voltage and current rating 5.1.3.1 Class CC fuseholders shall be rated 600 V. 5.1.3.2 Class CC fuseholders shall be rated 30 A. 5.1.4 Withstand r

38、ating 5.1.4.1 Class CC fuseholders shall have a short-circuit withstand rating of 200,000 A. 6 Marking 6.1 Marking of fuseholders 6.1.1.1 In addition to the requirements of Part 1, the fuseholder shall be marked: f) Use Class CC Fuses ; g) for panel mount and in-line fuseholders, “line” and ”load” s

39、hall be marked, with the terminal recessed furthest in the device designated as the line terminal; and h) “DO NOT OPERATE UNDER LOAD” or equivalent for fuseholders of the modular design where the fuse is inserted or removed by use of a carrier. FEBRUARY 28, 2007 NMX-J-009/4248/4-ANCE CSA C22.2 NO. 4

40、248.4-07 UL 4248-4 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 7 Construction 7.6 Contacts of a cartridge fuseholder 7.6.1 The dimensions of a Class CC fuseholder shall be as specied in Figure 7.6A. Class CC fuseholders shall be provide

41、d with a rejection member to prevent the installation of fuses of other classes. This is generated text for gtxt. FEBRUARY 28, 2007 NMX-J-009/4248/4-ANCE CSA C22.2 NO. 4248.4-07 UL 4248-4 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Figu

42、re 7.6A Class CC fuseholder Ferrule contact type with rejection number I n Max A Dimensions in mm (in) abcdefg Minimum width contact clip Distance between contact clips Minimum distance between end stop Nominal diameter fuse-link contact Nominal diameter fuse-link contact Maximum width of fuse- link

43、 support Minimum width contact clip 30 9.4 25.65 34.26 10.29 6.35 9.4 3.05 (0.370) (1.01) (1.349) (0.405) (0.250) (0.370) (0.120) FEBRUARY 28, 2007 NMX-J-009/4248/4-ANCE CSA C22.2 NO. 4248.4-07 UL 4248-4 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISS

44、ION FROM UL 8 Tests 8.1 General 8.1.1 Types of tests 8.1.1.1.1 Each fuseholder shall be subjected to the tests as specied in Part 1, with the addition of the following: e) verication of effectiveness of rejection member. 8.4 Verication of temperature rise 8.4.3 Test method 8.4.3.1 With dummy fuses i

45、n place and carrying rated current continuously, the temperature on a material or component or electrical insulation shall not exceed the values in Table 8.4A. 8.4.3.2 Dummy fuses shall be unplated copper and shall conform to the dimensions in Figure 8.4A. 8.4.3.3 The temperatures specied in Table 8

46、.4A 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 ambient temperature of 25C (77F), an observed temperature shall not exceed the required value specied in Table 8

47、.4A. 8.4.3.5 If a test is conducted at an ambient temperature other than 25C (77F), an observed temperature shall be corrected as described in Clause 8.4.3.6. Neither a corrected temperature nor an observed temperature shall exceed the required value specied in Table 8.4A. 8.4.3.6 An observed temper

48、ature shall be corrected by addition if the ambient temperature is lower than 25C (77F) or subtraction (if the ambient temperature is higher than 25C) of the difference between 25C and the ambient temperature. 8.4.3.7 If a corrected temperature exceeds the required value specied in Table 8.4A, at th

49、e request of the manufacturer, the test may be repeated at an ambient temperature closer to 25C (77F). This is generated text for gtxt. FEBRUARY 28, 2007 NMX-J-009/4248/4-ANCE CSA C22.2 NO. 4248.4-07 UL 4248-4 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Figure 8.4A Dimensions of a Class CC dummy fuse, mm (in) Dimensi