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4、s Inc. (UL) 333 Pfi ngsten Road Northbrook, IL 60062-2096 UL Standard for Safety for Particular Requirements for Drills, UL 745-2-1 Second Edition, Dated June 15, 2007 Summary of Topics This new Second edition was issued to clarify the UL effective date statement shown on the Preface page and to mak
5、e other administrative changes. The technical content of the First edition has been reproduced verbatim in this edition; the text of the standard has not been changed. As noted in the Commitment for Amendments statement located on the back side of the title page, UL and CSA are committed to updating
6、 this IEC-based binational standard jointly. However, this Second edition dated June 15, 2007 will not be issued by CSA since it addresses UL only administrative changes. The UL Foreword is no longer located within the UL Standard. For information concerning the use and application of the requiremen
7、ts contained in this Standard, the current version of the UL Foreword is located on ULStandardsInfoNet at: http:/ The master for this Standard at ULs Northbrook Office is the official document insofar as it relates to a UL service and the compliance of a product with respect to the requirements for
8、that product and service, or if there are questions regarding the accuracy of this Standard. ULs Standards for Safety are copyrighted by UL. Neither a printed copy of a Standard, nor the distribution diskette for a Standard-on-Diskette and the fi le for the Standard on the distribution diskette shou
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13、ss of the form of the claim. JUNE 15, 2007 UL 745-2-1tr1 免费标准网( w w w . f r e e b z . n e t ) 免费标准网( w w w . f r e e b z . n e t ) 无需注册 即可下载 Document Was Downloaded By Rice, Shi SHIMISHENG For Use By KUANTECH CO LTD 12039 : 8/7/2007 - 3:31 AM UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPROD
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22、 make a copy of the page or pages being viewed for their own fair and/or practical internal use. The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, fi gures, and/or other elements of the Standard having future effective dates as indicated in the prefa
23、ce. The prior text for requirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. New product submittals made prior to a specifi ed future effective date will be judged under all of the requirements
24、in this Standard including those requirements with a specifi ed future effective date, unless the applicant specifi cally requests that the product be judged under the current requirements. However, if the applicant elects this option, it should be noted that compliance with all the requirements in
25、this Standard will be required as a condition of continued Listing, Recognized and Follow-Up Services after the effective date, and understanding of this should be signifi ed in writing. Copyright 2007 Underwriters Laboratories Inc. This Standard consists of pages dated as shown in the following che
26、cklist: PageDate 1-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . June 15, 2007 JUNE 15, 2007 UL 745-2-1tr2 This PDF Standard downloaded from 免费标准网( w w w . f r e e b z . n e t ) 免费标准网( w w w
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28、 First Edition Underwriters Laboratories Inc. UL 745-2-1 Second Edition Particular Requirements for Drills June 15, 2007 免费标准网( w w w . f r e e b z . n e t ) 免费标准网( w w w . f r e e b z . n e t ) 无需注册 即可下载 Document Was Downloaded By Rice, Shi SHIMISHENG For Use By KUANTECH CO LTD 12039 : 8/7/2007 - 3
29、:31 AM UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Commitment for Amendments This Standard is issued jointly by Canadian Standards Association and Underwriters Laboratories Incorporated. Amendments to this Standard will be made only afte
30、r processing according to the Standards writing procedures by both Canadian Standards Association and Underwriters Laboratories Incorporated. ISBN 1-55397-485-9 2004 Canadian Standards Association All rights reserved. No part of this publication may be reproduced in any form whatsoever without the p
31、rior permission of the publisher. Copyright 1995, 2007 Underwriters Laboratories Inc. This PDF Standard downloaded from 免费标准网( w w w . f r e e b z . n e t ) 免费标准网( w w w . f r e e b z . n e t ) 无需注册 即可下载 Document Was Downloaded By Rice, Shi SHIMISHENG For Use By KUANTECH CO LTD 12039 : 8/7/2007 - 3
32、:31 AM UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
33、5 1. Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 2. Defi nitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
34、. . . . . . . . . . . . . . . . . .6 3. General requirement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 4. General notes on tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
35、 . . . . . . . . . . . . . . . . . . . . . . .7 5. Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 6. Classifi cation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
36、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 7. Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 8. Protection against electric shock . . . . . . .
37、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 9. Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 10. Input and current . . . . . . .
38、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 11. Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 12. Leakage
39、current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 13. Radio and television interference suppression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 14. Moisture resis
40、tance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 15. Insulation Resistance and electric strength . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 16. Endurance . . . .
41、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 17. Abnormal operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 18.
42、 Mechanical hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 19. Mechanical strength . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
43、 . .9 20. Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 21. Internal wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
44、 . . . . . . . . . . . . .10 22. Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 23. Supply connection and external fl exible cables and cords . . . . . . . . . . . . . . . . . . . . . . . . .
45、. . . . . .10 24. Terminals for external conductors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 25. Provision for earthing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
46、 . . . . .10 26. Screws and connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 27. Creepage distances, clearances and distances through insulation . . . . . . . . . . . . . . . . . . . . . . . .10 28. Resistance to he
47、at, fi re and tracking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 29. Resistance to rusting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 30. Tests by manufact
48、urers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 31. Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 JUNE 15
49、, 2007CAN/CSA-C22.2 NO. 745-2-1 UL 745-2-13 免费标准网( w w w . f r e e b z . n e t ) 免费标准网( w w w . f r e e b z . n e t ) 无需注册 即可下载 Document Was Downloaded By Rice, Shi SHIMISHENG For Use By KUANTECH CO LTD 12039 : 8/7/2007 - 3:31 AM UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Appendix A Thermal cut-outs and overload releases Appendix B Electronic Circuits Appendix C Construction of safety isolating transformer