ANSI UL 4248-9-2007 UL Standard for Safety Fuseholders C Part 9 Class K (First Edition Reprint with Revisions Through and Including April 4 2018)《熔断器支架安全标准.第9部分 K类》.pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 4248-9 Fuseholders Part 9: Class KUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER

2、 REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Fuseholders Part 9: Class K, UL 4248-9 First Edition, Dated February 28, 2007 Summary of Topics This revision to ANSI/UL 4248-9 is being issued to update the UL approval date per a UL Standards reaffirmation of ANSI/

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10、THOUT PERMISSION FROM UL Association of Standardization and Certication NMX-J-009/4248/9-ANCE First Edition CSA Group CSA C22.2 No. 4248.9-07 First Edition Underwriters Laboratories Inc. UL 4248-9 First Edition Fuseholders Part 9: Class K February 28, 2007 (Title Page Reprinted: December 21, 2012) A

11、NSI/UL 4248-9-2007 (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 (operating a

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20、RIAL 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 7 Construction 6 7.6 Contacts of a cartridge fuseholder 6 8 Tests 9 8.1 General .9 8.4 Vericatio

21、n of temperature rise .9 FEBRUARY 28, 2007 NMX-J-009/4248/9-ANCE CSA C22.2 NO. 4248.9-07 UL 4248-9 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Preface This is the common ANCE, CSA Group, and UL standard for Fuseholders Part 9: Class K.

22、It is the rst edition of NMX-J-009/4248/9-ANCE, the rst edition of CSA C22.2 No. 4248-9, and the rst edition of UL 4248-9. This common standard was prepared by the Association of Standardization and Certication (ANCE), CSA Group, and Underwriters Laboratories Inc. (UL). The efforts and support of th

23、e 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 standard. This standard was reviewed by the CSA Subcommittee on Low voltage fuses, under the jurisdiction of

24、 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. This standard will be submitted to the Standards Council of Canada for approval as a National Standard of

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26、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 application of this standard is stated in its scope, it is important to note that it remains the responsibility of

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29、tandard 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 soon as possible to each of the standards development organizations to more accurately reect the intent. A

30、NCE 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-009/4248/9-ANCE CSA C22.2 NO. 4248.9-07 UL 4248-9 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION

31、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 of November 2, 2009 all products Listed or Recognized by UL must comply with the requirements in this sta

32、ndard. 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 presently effective requirements only. The presently effective requirements are contained in the 10 th edition of

33、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-009/4248/9-ANCE CSA C22.2 NO. 4248.9-07 UL 4248-9 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSIO

34、N FROM UL Fuseholders Part 9: Class K 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 numbering of the Clauses in this Part correspond to like numbered Clauses in Part 1. The requirements of Part

35、 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 Scope 1.1.2 These requirements cover fuseholders intended for use with Class K Fuses as described in NMX-J-009

36、/248/9-2000-ANCE, CSA C22.2 No. 248.9, UL 248-9, Low-Voltage Fuses Part 9: Class K Fuses. 4 Classication 4.1 Class K fuseholders have a minimum short-circuit withstand rating of 50,000 A. Class K fuseholders are rated 250 V or 600 V, and are divided into six body sizes in each voltage rating corresp

37、onding to the Class K fuse body sizes. 5 Characteristics 5.1 Summary of characteristics 5.1.3 Voltage and current rating 5.1.3.1 Class K fuseholders shall be rated 250 V or 600 V. 5.1.3.2 Class K fuseholders shall be rated 30, 60, 100, 200, 400, or 600 A. 5.1.4 Withstand rating 5.1.4.1 Class K fuseh

38、olders shall have a minimum short-circuit withstand rating of a 10,000 A. 7 Construction 7.6 Contacts of a cartridge fuseholder 7.6.1 The dimensions of a Class K fuseholder, shall be as specied in Figure 7.6A or 7.6B, whichever is applicable. This is generated text for gtxt. FEBRUARY 28, 2007 NMX-J-

39、009/4248/9-ANCE CSA C22.2 NO. 4248.9-07 UL 4248-9 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Figure 7.6A Class K fuseholder Ferrule-contact type Tabs shown are a typical end-stop conguration. Class of fuse Potential rating of fuse, vol

40、ts Current rating of fuse, amperes Dimensions, mm (in) BCDE G Distance a between contact clips Minimum width of contact clip Diameter of ferrule Thickness of blade Distance between end stops Minimum Maximum K 250 30 25.4 (1.0) 12.7 (0.5) 14.27 (0.562) 51.59 (2.031) 53.97 (2.125) 60 44.45 (0.750) 15.

41、88 (0.625) 20.62 (0.812) 76.99 (3.031) 79.38 (3.125) 100 101.6 (4.0) 22.22 (0.875) 3.18 (0.125) 200 114.3 (4.5) 31.75 (1.250) 4.75 (0.187) 400 127.0 (5.0) 44.45 (1.750) 6.35 (0.250) 600 152.4 (6.0) 53.97 (2.125) 6.35 (0.250) 600 30 101.6 (4.0) 12.7 (0.5) 20.62 (0.812) 127.79 (5.031) 130.17 (5.125) 6

42、0 107.95 (4.250) 15.88 (0.625) 26.97 (1.062) 140.49 (5.031) 142.88 (5.625) 100 152.4 (6.0) 22.23 (0.785) 3.18 (0.125) 200 177.8 (7.0) 31.75 (1.250) 4.75 (0.187) 400 203.2 (8.0) 44.45 (1.750) 6.35 (0.250) 600 228.6 (9.0) 53.97 (2.125) 6.35 (0.250) a Tolerances for the B dimensions are: 60 A or less:

43、plus 0.79 mm (0.031 in) and minus 1.57 mm (0.062 in); 100 and 200 amperes: plus 1.57 mm (0.062 in) and minus 0.79 mm (0.031 in); 400 and 600 amperes: plus 2.36 mm (0.093 in). FEBRUARY 28, 2007 NMX-J-009/4248/9-ANCE CSA C22.2 NO. 4248.9-07 UL 4248-9 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER

44、 REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Figure 7.6B Class K fuseholder Knife-blade type Class of fuse Potential rating of fuse, volts Current rating of fuse, amperes Dimensions, mm (in) BCDE G Distance a between contact clips Minimum width of contact clip Diameter of ferrule Thickne

45、ss of blade Distance between end stops Minimum Maximum K 250 30 25.4 (1.0) 12.7 (0.5) 14.27 (0.562) 51.59 (2.031) 53.97 (2.125) 60 44.45 (0.750) 15.88 (0.625) 20.62 (0.812) 76.99 (3.031) 79.38 (3.125) 100 101.6 (4.0) 22.22 (0.875) 3.18 (0.125) 200 114.3 (4.5) 31.75 (1.250) 4.75 (0.187) 400 127.0 (5.

46、0) 44.45 (1.750) 6.35 (0.250) 600 152.4 (6.0) 53.97 (2.125) 6.35 (0.250) 600 30 101.6 (4.0) 12.7 (0.5) 20.62 (0.812) 127.79 (5.031) 130.17 (5.125) 60 107.95 (4.250) 15.88 (0.625) 26.97 (1.062) 140.49 (5.031) 142.88 (5.625) 100 152.4 (6.0) 22.23 (0.785) 3.18 (0.125) 200 177.8 (7.0) 31.75 (1.250) 4.75

47、 (0.187) 400 203.2 (8.0) 44.45 (1.750) 6.35 (0.250) 600 228.6 (9.0) 53.97 (2.125) 6.35 (0.250) a Tolerances for the B dimensions are: 60 A or less: plus 0.79 mm (0.031 in) and minus 1.57 mm (0.062 in); 100 and 200 amperes: plus 1.57 mm (0.062 in) and minus 0.79 mm (0.031 in); 400 and 600 amperes: pl

48、us 2.36 mm (0.093 in). FEBRUARY 28, 2007 NMX-J-009/4248/9-ANCE CSA C22.2 NO. 4248.9-07 UL 4248-9 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION 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 te

49、sts as specied in Part 1. 8.4 Verication of temperature rise 8.4.3 Test method 8.4.3.1 With dummy fuses in place and carrying rated current continuously, the temperature on a material or component or electrical insulation shall not exceed the values in Table 8.4B. 8.4.3.2 Dummy fuses shall be unplated copper and shall conform to t