1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1417 Special Fuses for Radio- and Television- Type Appliances STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL
2、COPYRIGHTED MATERIAL 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 This revision to ANSI/UL 1417 is being issued t
3、o reect the recent reaffirmation of UL 1417 as an American National Standard. No changes have been made to the requirements within this standard. The new and revised requirements are substantially in accordance with Proposal(s) on this subject dated January 20, 2017. Text that has been changed in an
4、y manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwi
5、se without prior permission of UL. UL provides this Standard as is without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or tness for any purpose. In no event will UL be liable for any special, incidental, consequential, in
6、direct or similar damages, including loss of prots, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liability for
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8、attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. MARCH 8, 2017 UL 1417 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 8, 2017 UL 1
9、417 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 18, 1999 (Title Page Reprinted: March 8, 2017) 1 UL 1417 Standard for Special Fuses for Radio- and Television- Type Appliances The First edition was titled S
10、pecial Fuses for Radio and Television Receiving Appliances and Other Electronic Equipment and numbered UL 492.7. First Edition January, 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 Standar
11、d for Safety consists of the Sixth Edition including revisions through March 8, 2017. The most recent designation of ANSI/UL 1417 as a Reaffirmed American National Standard (ANS) occurred on March 8, 2017. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, and Title Pag
12、e. 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 (CSDS) at https:/. ULs Standards for Safety are copyrighted by UL. Neither a printed n
13、or electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2017 UNDERWRITERS LABORATORIES INC. ANSI/UL 1417-2012 (R2017)UL COPYRIGHTED MATERIAL
14、NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 8, 2017 SPECIAL FUSES 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 CONTENT
15、S INTRODUCTION 1 Scope .5 2 Units of Measurement .5 3 References .5 CONSTRUCTION 4 General 6 5 Corrosion Protection .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 Rec
16、alibration Test 9 14 Limited Short-Circuit Test .9 15 Overcurrent Test 10 16 Circuit Interruption Test 10 17 Multiple-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
17、General 12 24 Cautionary .12 25 Identication .12 MARCH 8, 2017 SPECIAL FUSES FOR RADIO- AND TELEVISION- TYPE 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
18、FUSES FOR RADIO- AND TELEVISION- TYPE APPLIANCES - UL 1417 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER 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
19、 radio- and television-type appliances where they are relied upon to limit power or current, or both. These 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
20、 fuse with these requirements does not assure that it is acceptable for use as a protective device in the 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
21、 is nonrenewable, that is, the fuse element cannot be replaced after operation, but it can be multi-operational (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 con
22、ditions that prevail in actual service. Accordingly, for a particular application, the special fuse may be 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
23、requirements. 1.4 Deleted January 22, 2004 2 Units of Measurement 2.1 Values stated without parentheses are 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 th
24、e requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. 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 FR
25、OM UL CONSTRUCTION 4 General 4.1 A special fuse shall be complete, including means for connection. 4.2 A special 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 ref
26、erred to in 4.2 may be a part of the fuse or a part of the appliance that individually encloses the fuse. 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
27、 Protection 5.1 Iron and steel parts, except where such protection is detrimental, shall be protected against 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 opera
28、tion may depend. It does not apply to small, minor parts of iron or steel such as washers, screws, bolts, 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 p
29、arts is recommended. Parts made of stainless steel (properly polished or treated if necessary) do not require 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 o
30、f actual service. Strength, ammability, arc resistance, moisture resistance, and resistance to hot-wire ignition 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 b
31、e subject to the inuence of the arc formed by the opening of the interruption mechanism, shall be acceptable 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,
32、 and resistance to hot-wire ignition tests described in Sections 9, 14, 15, and 18 21. 7 Mounting 7.1 A fuse 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
33、 part used for securing parts of the assembly so that replacement of the fuse does not require disassembly 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
34、any direction permitted by the construction. OCTOBER 18, 1999 SPECIAL FUSES FOR RADIO- AND TELEVISION- TYPE 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 dia
35、meter (or diagonal), each terminal shall be capable of withstanding for 1 minute without permanent damage 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
36、mm) in diameter (or diagonal) or less needs to withstand only 10 inch-ounces (0.08 Nm). 7.4 A plug-in fuse 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 f
37、use shall be positive seating in its holder. b) A plug-in fuse shall be securely held in the fully seated 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 f
38、use with respect to its holder is necessary, the fuse and its holder shall be constructed to provide for such 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
39、not conductively connected to live parts shall not be less than that specied in Table 8.1. For 600-V rms potentials 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 p
40、lace of one-half the required spacings shall not be less than 0.013 inch (0.33 mm) thick. Barriers or liners 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 spa
41、cings in inches(mm) a,b Potential involved in volts Over surface Through air 0 125 (rms) 1/16 (1.6) 1/16 (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) i
42、s provided, lesser spacings may be considered. b This tabulation is based on sinusoidal waveforms. Special 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 t
43、han friction between surfaces. 8.3 Each uninsulated live part, including a terminal, shall be secured to its 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
44、 those required. OCTOBER 18, 1999 SPECIAL FUSES FOR RADIO- AND TELEVISION- TYPE APPLIANCES - UL 1417 7UL COPYRIGHTED 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 determi
45、ned by the requirements for tests for ammability of plastic materials for parts in devices and appliances, 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, i
46、t is to be inserted in the holder for all tests in which it is to be electrically connected. 10.2 All ratings 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.
47、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 rated current until thermal equilibrium is r
48、eached, without clearing the circuit. 11.2 To determine whether a special fuse complies with 11.1, six representative fuses are to be individually connected in series with a variable load resistor to a supply source of rated voltage. 11.3 The test specied in 11.2 is to be conducted both before and a
49、fter the accelerated aging test specied in 13.2 13.4. The same or different representative devices may be used for each test. 12 Clearing-Time Calibration Test 12.1 The clearing time of a special fuse shall be consistent as determined by the test in this Section. 12.2 To determine whether a special fuse complies with 12.1, a clearing time versus current curve is to be drawn using random current values. Seven representative fuses are to be tested at each current value, and the average of the cl
