1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1417 Special Fuses for Radio- and Television- Type AppliancesUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL
2、 NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Special Fuses for Radio- and Television- Type Appliances, UL 1417 Sixth Edition, Dated October 18, 1999 Summary of Topics These revisions include a revised title page to reect the ANSI appr
3、oval of the current edition of UL 1417. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. Changes in requirements are marked with a vertical line in the margin and are followed by an effective date note indicating t
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11、otice. DECEMBER 20, 2012 UL 1417 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 20, 2012 UL 1417 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL
12、OCTOBER 18, 1999 (Title Page Reprinted: December 20, 2012) 1 UL 1417 Standard for Special Fuses for Radio- and Television- Type Appliances The First edition was titled Special Fuses for Radio and Television Receiving Appliances and Other Electronic Equipment and numbered UL 492.7. First Edition Janu
13、ary, 1974 Second Edition October, 1981 Third Edition March, 1983 Fourth Edition July, 1988 Fifth Edition August, 1994 Sixth Edition October 18, 1999 This ANSI/UL Standard for Safety consists of the Sixth Edition including revisions through December 20, 2012. The most recent designation of ANSI/UL 14
14、17 as an American National Standard (ANSI) occurred on December 20, 2012. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effective date information. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Pr
15、oposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ow
16、nerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2012 UNDERWRITERS LABORATORIES INC. ANSI/UL 1417-2012UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 20, 2012 SPECIAL FUSES
17、 FOR RADIO- AND TELEVISION- TYPE APPLIANCES - UL 1417 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 Units of Measurement .5 3 References .5 CONSTRUCTION 4 General 6 5 Corrosion Prote
18、ction .6 6 Insulating Material .6 7 Mounting .6 8 Spacings .7 9 Flammability 8 PERFORMANCE 10 General .8 11 Carrying Capacity Test .8 12 Clearing-Time Calibration Test 8 13 Clearing-Time Recalibration Test 9 14 Limited Short-Circuit Test .9 15 Overcurrent Test 10 16 Circuit Interruption Test 10 17 M
19、ultiple-Function Devices 10 18 Arc Resistance Test .11 19 High-Current Arc Ignition Test 11 20 Hot-Wire Ignition Test .11 21 Resistance to Moisture Test 11 RATINGS 22 General 11 MARKINGS 23 General 12 24 Cautionary .12 25 Identication .12 DECEMBER 20, 2012 SPECIAL FUSES FOR RADIO- AND TELEVISION- TY
20、PE APPLIANCES - UL 1417 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL This page intentionally left blank. DECEMBER 20, 2012 SPECIAL FUSES FOR RADIO- AND TELEVISION- TYPE APPLIANCES - UL 1417 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FUR
21、THER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover special types of fuses not covered by separate requirements and that are for use in radio- and television-type appliances where they are relied upon to limit power or current, or both. Thes
22、e requirements also apply to holders intended to accept such special fuses, where the holder may be an integral part of the fuse design. It should be noted, however, that compliance of a special fuse with these requirements does not assure that it is acceptable for use as a protective device in the
23、end-use product. 1.2 A special fuse is a single function (providing protection only) device intended to interrupt a current ow when the current passing through it exceeds a preselected value. It is nonrenewable, that is, the fuse element cannot be replaced after operation, but it can be multi-operat
24、ional (multi-element). 1.3 The acceptability of any special fuse covered by these requirements in any particular device or appliance depends upon its effectiveness in continued use under the conditions that prevail in actual service. Accordingly, for a particular application, the special fuse may be
25、 affected by the requirements for the device or appliance in question, and it may be necessary to employ protective devices having features other than, or in addition to, those specied in these requirements. 1.4 Deleted January 22, 2004 2 Units of Measurement 2.1 Values stated without parentheses ar
26、e the requirement. Values in parentheses are explanatory or approximate information. 3 References Section 3 added October 18, 1999 3.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or st
27、andard. JANUARY 22, 2004 SPECIAL FUSES FOR RADIO- AND TELEVISION- TYPE APPLIANCES - UL 1417 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONSTRUCTION 4 General 4.1 A special fuse shall be complete, including means for connection. 4.2 A s
28、pecial fuse shall have an enclosure that shall be tight tting so as to keep lint and dust from collecting around the fuse element and becoming ignited when the fuse clears. 4.3 The enclosure referred to in 4.2 may be a part of the fuse or a part of the appliance that individually encloses the fuse.
29、4.4 A current-carrying part shall have the necessary mechanical strength and current-carrying capacity, and shall be of a material, that is acceptable for the particular application. 5 Corrosion Protection 5.1 Iron and steel parts, except where such protection is detrimental, shall be protected agai
30、nst corrosion by enameling, galvanizing, plating, or other equivalent means. 5.2 The requirement of 5.1 applies to all enclosing cases, and to all springs and other parts upon which proper operation may depend. It does not apply to small, minor parts of iron or steel such as washers, screws, bolts,
31、and the like that are not current-carrying, if the malfunction of such unprotected parts does not result in an inability of the component to operate as intended, but the protection of all such parts is recommended. Parts made of stainless steel (properly polished or treated if necessary) do not requ
32、ire additional protection against corrosion. 6 Insulating Material 6.1 A base for the support of current-carrying parts shall be of insulating material that is able to withstand the conditions of actual service. Strength, ammability, arc resistance, moisture resistance, and resistance to hot-wire ig
33、nition are among the characteristics that are to be considered. See Sections 9 and 18 21. 6.2 Insulating material, including barriers between parts of different potential and material that may be subject to the inuence of the arc formed by the opening of the interruption mechanism, shall be acceptab
34、le for the particular application. Among the characteristics that are to be considered are performance in the overcurrent, limited short-circuit, ammability, arc-resistance, moisture-resistance, and resistance to hot-wire ignition tests described in Sections 9, 14, 15, and 18 21. 7 Mounting 7.1 A fu
35、se and its mounting means shall not be adversely affected by strain, pressure, or torsion on terminals or leads. A bolt, screw, or other part used for mounting a fuse shall be independent of any part used for securing parts of the assembly so that replacement of the fuse does not require disassembly
36、 of the fuse or its mounting means. 7.2 A lead or terminal shall be capable of withstanding for 1 minute, without permanent damage to the fuse body, lead or terminal a 5 lbf (22.2 N) applied in any direction permitted by the construction. OCTOBER 18, 1999 SPECIAL FUSES FOR RADIO- AND TELEVISION- TYP
37、E APPLIANCES - UL 1417 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 7.3 Except for a fuse that is 1/4 inch (6.35 mm) or less in diameter (or diagonal), each terminal shall be capable of withstanding for 1 minute without permanent damage
38、to the fuse body, lead or terminal a torque of 25 inch ounces (0.19 Nm) applied at a right angle to the direction of the terminal extension from the fuse. Each terminal of a fuse 1/4 inch (6.35 mm) in diameter (or diagonal) or less needs to withstand only 10 inch-ounces (0.08 Nm). 7.4 A plug-in fuse
39、 that requires full insertion in its holder to comply with the Limited Short-Circuit Test, Section 14 and the Overcurrent Test, Section 15 shall comply with both of the following: a) A plug-in fuse shall be positive seating in its holder. b) A plug-in fuse shall be securely held in the fully seated
40、position by a detent, clip, or equivalent means. 7.5 It shall be obvious by sight, sound, or feel when the fuse mentioned in 7.4 is fully seated. See 24.1. 7.6 If alignment or positioning of a fuse with respect to its holder is necessary, the fuse and its holder shall be constructed to provide for s
41、uch alignment or positioning. 8 Spacings 8.1 The minimum spacings between any uninsulated live part and an uninsulated live part of different potential or an uninsulated dead metal part that is not conductively connected to live parts shall not be less than that specied in Table 8.1. For 600-V rms p
42、otentials or less, a ber barrier or liner used in place of required spacings shall not be less than 0.028 inch (0.71 mm) thick. For 600-V rms potentials or less, a ber barrier or liner used in place of one-half the required spacings shall not be less than 0.013 inch (0.33 mm) thick. Barriers or line
43、rs of materials other than ber shall be considered with regard to their dielectric capability, mechanical strength, and other factors needed for the application. Table 8.1 Minimum acceptable spacings in inches(mm) a,b Potential involved in volts Over surface Through air 0 125 (rms) 1/16 (1.6) 1/16 (
44、1.6) 126 250 (rms) 3/32 (2.4) 3/32 (2.4) 251 600 (rms) 3/16 (4.8) 5/32 (4.0) 850 2500 (peak) 5/16 (7.9) 3/16 (4.8) a When protection against contamination (externally and internally generated) is provided, lesser spacings may be considered. b This tabulation is based on sinusoidal waveforms. Special
45、 fuses intended for use in circuits with other waveforms shall be considered with regard to the intent of the requirements. 8.2 A required barrier shall be held in place by a means more secure than friction between surfaces. 8.3 Each uninsulated live part, including a terminal, shall be secured to i
46、ts supporting surface by a method other than friction between surfaces so that it is kept from turning or shifting in position if such motion could result in a reduction of spacings to less than those required. OCTOBER 18, 1999 SPECIAL FUSES FOR RADIO- AND TELEVISION- TYPE APPLIANCES - UL 1417 7UL C
47、OPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 9 Flammability 9.1 Each material used in a special fuse shall be classied as V-0 as determined by the requirements for tests for ammability of plastic materials for parts in devices and appliances,
48、 UL 94. PERFORMANCE 10 General 10.1 For all tests the special fuse is to be mounted in the position that has the greatest adverse effect on the performance. If intended to be used in a holder, it is to be inserted in the holder for all tests in which it is to be electrically connected. 10.2 All rati
49、ngs are to be tested with a full complement of representative devices for each. All tests are to be conducted in a 25.0 3.0C (77.0 5.4F) ambient. All deviations referred to are absolute values. 10.3 These tests may be performed at other conditions than those specied in 10.1 and 10.2 if the conditions: a) Will not signicantly affect the test results and b) Are agreeable to those concerned. 11 Carrying Capacity Test 11.1 A special fuse shall carry rat
