1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 697 Toy TransformersUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION
2、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 remove the reference to the withdrawal date of UL 873. Text that has been changed in any manner or impacted
3、 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 the date of publication or the date on which the changed requirement becomes effective. All r
4、ights 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 otherwise without prior permission of UL. UL provides this Standard as is without warranty of any kind, either expr
5、essed 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, indirect or similar damages, including loss of prots, lost savings, loss of data, or any other damages arising
6、 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 any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the e
7、lectronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL 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 St
8、andard on the purchasers computer system. The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, gures, and/or other elements of the Standard having future effective dates as indicated in the note following the affected item. The prior text for requiremen
9、ts that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. OCTOBER 30, 2013 UL 697 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 30, 2013
10、 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: October 30, 2013) 1 UL 697 Standard for Toy Transformers First Edition September, 1973 Second Edition February, 1975 Third E
11、dition 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 including revisions through October 30, 2013. The most recent designation of ANSI/UL 697 as an American Na
12、tional Standard (ANSI) occurred on April 10, 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. Proposals should be submi
13、tted 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, ownerships, and rights re
14、garding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2013 UNDERWRITERS LABORATORIES INC. ANSI/UL 697-2012UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 3, 2011 TOY TRANSFORMERS - UL 697 2 No Text on Th
15、is 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 References 6 5 Glossary .6 CONSTRUCTION 6 General 6 7 Mechanical Assembly .7 8 Enclosure 8 8.1 General
16、 .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 .19 15 Coil Insulation 19 16 Power Supply Connections 22 17 Output Connections .23 18 Strain Relie
17、f 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 Leakage Current and Dielectric Voltage-Withstand Test After Humidity Exposure .31 28 Maximum Secondary
18、 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 Voltage-Withstand Test .39 36 Push-Back Relief Test .39 37 Power Supply Strain Relief Test 40 38
19、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 DISTRIBUTION WITHOUT PERMISSION FROM UL 41 Overload Test on Secondary Switches 41 42 Abuse Test 42 43
20、 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 47 Handles and Knobs Test 44 MANUFACTURING AND PRODUCTION TESTS 48 Details .45 RATINGS 49 General
21、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 COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL I
22、NTRODUCTION 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-voltage type. It is intended primarily to supply current to electrically operated toys, and as such is e
23、xpected 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 that may be involved, and the construction is made to reduce the risk of re with respect to the ignition
24、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 the secondary output of a toy transformer. 1.3 Toy transformers marked Class 2 are evaluated to the r
25、equirements 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 shall comply with the requirements for that component. See Appendix A for a list of standards coverin
26、g 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 in the application of the component in the product covered by this standard, or b) Is superseded by a r
27、equirement 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 or restricted in performance capabilities. Such components are intended for use only under limited co
28、nditions, 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 AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3 Units of Measurement 3.1 Va
29、lues 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 in the requirements of this standard shall be interpreted as referring to the latest edition of that c
30、ode 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 potential risk of re, electric shock, or injury to persons. 5.3 ORDINARY TOOL Pliers, at-bladed and Phillips-
31、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 particular use shall be used in a transformer. A transformer shall be made and nished with the degree of unifo
32、rmity 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 application. If a thermostat is relied upon to satisfy the requirements of this standard, its acceptabili
33、ty 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, Part 1: General Requirements, UL 60730-1, and/or the applicable Part 2 standard from the UL 60730 series
34、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 upon to satisfy the requirements of this standard, its acceptability shall be determined by the Standa
35、rd 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 circuit and the enclosure. OCTOBER 30, 2013 TOY TRANSFORMERS - UL 697 6UL COPYRIGHTED MATERIAL NOT AU
36、THORIZED 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 necessary to resist the abuses to which it is subjected, without producing or increasing the risk of re, ele
37、ctric 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 transformer shall have all parts secured in place. 7.3 A transformer shall be constructed so that it is not nece
38、ssary 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 lampholders, shall be kept from turning in accordance with 7.7. 7.5 A plunger or other type of nontoggle switch
39、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: a) The means by which the switch is mounted is such as to make it unlikely that the switch can loose
40、n 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 replaced (such as a neon pilot or indicator light in which the lamp is sealed in by a nonremovable je
41、wel) 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 mounted and kept from turning, unless the turning of such a component is part of the design of the tr
42、ansformer, 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 noted in 7.7 is to consist of more than friction between surfaces. For example, the correct use of a lo
43、ck 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 be wired in the secondary circuit, and shall not have a potential difference greater than 30 V rms (4
44、2.4 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, such as an indicating type of overload or short-circuit protector, a neon light, or an indicator light,
45、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 FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 7.11 A protective device, built into
46、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, eutectic material, and similar devices intended to interrupt the ow of current as a result of transformer
47、 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 replaceable without opening the enclosure. 7.13 A switch in the primary circuit or an overcurrent-protectiv
48、e 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 the actuating means of a switch. 7.14 If the exterior part of the switch or control forms part of a tr
49、ansformer 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) 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
