1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 697 Toy Transformers STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR F
2、URTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Toy Transformers, UL 697 Seventh Edition, Dated March 3, 2011 Summary of Topics This revision to UL 697 is being issued to update the title page with the reaffirmed ANSI approval date. The revisions are substan
3、tially in accordance with Proposal(s) on this subject dated June 24, 2016. Text that has been changed in any 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
4、system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise 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 merchantabi
5、lity or tness for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect 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
6、 UL representative has been advised of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold U
7、L harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. AUGUST 17, 2016 UL 697 tr1UL COPYRIGHTED MA
8、TERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 17, 2016 UL 697 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 3, 2011 (Title Page Reprinted: August 17, 2016) 1
9、UL 697 Standard for Toy Transformers First Edition September, 1973 Second Edition February, 1975 Third Edition January, 1986 Fourth Edition June, 1993 Fifth Edition May, 1998 Sixth Edition October, 2004 Seventh Edition March 3, 2011 This ANSI/UL Standard for Safety consists of the Seventh edition in
10、cluding revisions through August 17, 2016. The most recent designation of ANSI/UL 697 as a Reaffirmed American National Standard (ANS) occurred on August 15, 2016. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, and Title Page. Comments or proposals for revisions on
11、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 http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be
12、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 2016 UNDERWRITERS LABORATORIES INC. ANSI/UL 697-2012 (R2016)UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR D
13、ISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 3, 2011 TOY TRANSFORMERS - UL 697 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 Components .5 3 Units of Measurement .6 4 Undated Referen
14、ces 6 5 Glossary .6 CONSTRUCTION 6 General 6 7 Mechanical Assembly .7 8 Enclosure 8 8.1 General 8 8.2 Enclosure direct plug-in type 12 9 Sharp Edges and Corners 17 10 Corrosion Protection 18 11 Exposed Parts 18 12 Coatings, Paints, Lacquers, and the Like .18 13 Insulating Material .19 14 Switches .1
15、9 15 Coil Insulation .19 16 Power Supply Connections .22 17 Output Connections 23 18 Strain Relief 24 19 Bushings .24 20 Internal Wiring 25 21 Spacings .25 22 Alternate Spacings 27 23 Separation of Circuits 27 24 Printed-Wiring Boards 28 PERFORMANCE 25 General 28 26 Leakage Current Test 29 27 Leakag
16、e Current and Dielectric Voltage-Withstand Test After Humidity Exposure .31 28 Maximum Secondary Voltage Test 31 29 Power Input Test 32 30 Output Test .32 31 Heating Test 32 32 Output Loading Test .37 33 Component Breakdown Test 38 34 Printed-Wiring Board Abnormal Operation Test .38 35 Dielectric Vo
17、ltage-Withstand Test 39 36 Push-Back Relief Test .39 37 Power Supply Strain Relief Test .40 38 Output Strain Relief Test .40 39 Endurance Test .41 40 Overload Test on Primary Switches 41 MARCH 3, 2011 TOY TRANSFORMERS - UL 697 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTR
18、IBUTION WITHOUT PERMISSION FROM UL 41 Overload Test on Secondary Switches .41 42 Abuse Test .42 43 Direct Plug-In Blade Secureness Test 43 44 Direct Plug-In Security of Input Contacts Test .43 45 Rod Pressure Test on Direct Plug-In Units .44 46 Resistance to Crushing Test on Direct Plug-In Units .44
19、 47 Handles and Knobs Test .44 MANUFACTURING AND PRODUCTION TESTS 48 Details .45 RATINGS 49 General 46 MARKINGS 50 General 46 51 Flexible-Film Bags .47 52 Form .48 53 Package Labeling .50 INSTRUCTIONS 54 General 50 APPENDIX A Standards for ComponentsA1 MARCH 3, 2011 TOY TRANSFORMERS - UL 697 4UL COP
20、YRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover toy transformers designed to be used on nominal 120-V branch circuits. A toy transformer is a step-down isolating transformer of the low-secondary-vo
21、ltage type. It is intended primarily to supply current to electrically operated toys, and as such is expected to be subjected to careless use and probable short circuit of the secondary terminals. Accordingly, the design of a toy transformer takes into consideration the rather unusual risk of re tha
22、t may be involved, and the construction is made to reduce the risk of re with respect to the ignition of nearby combustible material as the result of overheating or eventual inoperative condition of the transformer itself. 1.2 These requirements do not cover toys or the like designed to operate from
23、 the secondary output of a toy transformer. 1.3 Toy transformers marked Class 2 are evaluated to the requirements in the Standard for Class 2 Power Units, UL 1310, and to the requirements in this Standard. 2 Components 2.1 Except as indicated in 2.2, a component of a product covered by this standard
24、 shall comply with the requirements for that component. See Appendix A for a list of standards covering components generally used in the products covered by this standard. 2.2 A component is not required to comply with a specic requirement that: a) Involves a feature or characteristic not required i
25、n the application of the component in the product covered by this standard, or b) Is superseded by a requirement in this standard. 2.3 A component shall be used in accordance with its rating established for the intended conditions of use. 2.4 Specic components are incomplete in construction features
26、 or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specied limits, and shall be used only under those specic conditions. MARCH 3, 2011 TOY TRANSFORMERS - UL 697 5UL COPYRIGHTED MATERIAL NOT AUTHOR
27、IZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3 Units of Measurement 3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 4 Undated References 4.1 Any undated reference to a code or standard appearing
28、in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. 5 Glossary 5.1 For the purpose of this Standard the following denitions apply. 5.2 ENCLOSURE Any surface or surrounding structure that makes unlikely any access to a real or potenti
29、al risk of re, electric shock, or injury to persons. 5.3 ORDINARY TOOL Pliers, at-bladed and Phillips-head screw drivers are considered to be ordinary tools. CONSTRUCTION 6 General 6.1 Only materials that reduce the risk of re, electric shock, and injury to persons, and are intended for the particul
30、ar use shall be used in a transformer. A transformer shall be made and nished with the degree of uniformity and grade of workmanship that are practicable in a well-equipped factory. 6.2 A thermostat incorporated in a transformer shall not increase the risk of re or electric shock due to improper app
31、lication. If a thermostat is relied upon to satisfy the requirements of this standard, its acceptability shall be determined by the Standard for Temperature-Indicating and -Regulating Equipment, UL 873. Compliance with the Standard for Automatic Electrical Controls for Household and Similar Use, Par
32、t 1: General Requirements, UL 60730-1, and/or the applicable Part 2 standard from the UL 60730 series fullls these requirements. 6.2 revised October 30, 2013 6.3 A thermal cutoff incorporated in a transformer shall not increase the risk of re or electric shock due to improper application. If relied
33、upon to satisfy the requirements of this standard, its acceptability shall be determined by the Standard for Thermal-Links Requirements and Application Guide, UL 60691. 6.4 There shall be no electrical connection between the primary and secondary windings of a toy transformer, or between a secondary
34、 circuit and the enclosure. OCTOBER 30, 2013 TOY TRANSFORMERS - UL 697 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 7 Mechanical Assembly 7.1 A toy transformer shall be formed and assembled so that it has the strength and rigidity necess
35、ary to resist the abuses to which it is subjected, without producing or increasing the risk of re, electric shock, or injury to persons due to total or partial collapse with resulting reduction of spacings, loosening or displacement of parts, or other serious defects. See also 42.1. 7.2 A transforme
36、r shall have all parts secured in place. 7.3 A transformer shall be constructed so that it is not necessary to open or remove the enclosure during use. 7.4 Each switch, lampholder, and similar component shall be mounted securely and, except as noted in 7.5 and 7.6 for certain switches and lampholder
37、s, shall be kept from turning in accordance with 7.7. 7.5 A plunger or other type of nontoggle switch that does not tend to rotate when operated and that is operated by mechanical means rather than by direct contact by persons need not be kept from turning if both of the following conditions are met
38、: a) The means by which the switch is mounted is such as to make it unlikely that the switch can loosen as a result of being operated. b) Rotation of the intentionally loosened switch does not reduce spacings below the minimum acceptable values. 7.6 A lampholder of a type in which the lamp cannot be
39、 replaced (such as a neon pilot or indicator light in which the lamp is sealed in by a nonremovable jewel) need not be kept from turning if rotation cannot reduce spacings below the minimum acceptable values or produce stress on a connection. 7.7 A switch or other similar component shall be securely
40、 mounted and kept from turning, unless the turning of such a component is part of the design of the transformer, and introduces no additional risk of injury to persons, re, or electric shock such as reduced spacings below minimum acceptable values, or stress on a connection. 7.8 The mounting means n
41、oted in 7.7 is to consist of more than friction between surfaces. For example, the correct use of a lock washer or a keyed and notched insert plus a lock washer for a single-hole mounting is considered acceptable. 7.9 A replaceable pilot lamp in a transformer shall be of the incandescent type, shall
42、 be wired in the secondary circuit, and shall not have a potential difference greater than 30 V rms (42.4 V peak) between any of its electrodes or lampholder contacts and any other part or ground. During relamping, the enclosure shall comply with 8.1.2 and 8.1.3. 7.10 A nonreplaceable pilot lamp, su
43、ch as an indicating type of overload or short-circuit protector, a neon light, or an indicator light, is one in which the lamp is sealed-in, such as by a nonremovable jewel. Such a lamp may be in the primary circuit. MARCH 3, 2011 TOY TRANSFORMERS - UL 697 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR
44、 FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 7.11 A protective device, built into a toy transformer, shall comply with the requirements for that component. See also 6.2 and 6.3. 7.12 Protective devices covered by 7.11 include fuses, overtemperature and overcurrent protectors, eut
45、ectic material, and similar devices intended to interrupt the ow of current as a result of transformer overload. A protective device that is relied upon shall not be replaceable. A protective device that is not relied upon may be replaceable provided it is wired in the secondary circuit and is repla
46、ceable without opening the enclosure. 7.13 A switch in the primary circuit or an overcurrent-protective device shall be located within the transformer enclosure in such a manner that is not accessible or exposed to tampering or subject to damage during normal use. This requirement does not apply to
47、the actuating means of a switch. 7.14 If the exterior part of the switch or control forms part of a transformer enclosure, those parts shall comply with the requirements for abuse stated in 42.1. 7.15 The requirements stated in 7.13 shall also apply to the actuating means (toggle handle and the like
48、) if the dislodging of such a part exposes live parts or lm-coated magnet wire that can be contacted by the probe specied in 8.1.3. 8 Enclosure 8.1 General 8.1.1 In addition to the requirements in 8.1, a wall-mounted (direct plug-in type) transformer shall comply with the requirements in 8.2. 8.1.2
49、An enclosure containing a wire, splice, connection, or electrical component at a potential of more than 42.4 V peak to any other part or to ground shall: a) Be assembled by welding, riveting, the use of special screws that are not removable with an ordinary tool used in the intended manner, or the equivalent; and b) Have no opening that enables the entry of a straight rod 1/4 inch (6.4 mm) in diameter. 8.1.3 An enclosure shall have no opening through which a 0.010 inch (0.26 mm) diameter music wi
