1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 5085-1 Low Voltage Transformers Part 1: General RequirementsUL 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 Low Voltage Transformers Part 1: General Requirements, UL 5085-1 First Edition, Dated April 17, 2006 Summary of Topics This revision to ANSI/UL 5085-1 is being issued to incorporate the foll
3、owing: Addition of Requirements for Double Insulation Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. The new and revised requirements are substantially in accordance with Proposal(s) on this subject dated August
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8、n electronic Standard 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 preface. The prior text for requirements that ha
9、ve been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. DECEMBER 6, 2013 UL 5085-1 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 6, 2013 UL 508
10、5-1 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CSA Group CSA C22.2 No. 66.1-06 First Edition Underwriters Laboratories Inc. UL 5085-1 First Edition Low Voltage Transformers Part 1: General Requirements April 17,
11、2006 (Title Page Reprinted: December 6, 2013) ANSI/UL 5085-1-2013UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Commitment for Amendments This standard is issued jointly by the Canadian Standards Association (operating as “CSA Group”) and U
12、nderwriters Laboratories Inc. (UL). Comments or proposals for revisions on any part of the standard may be submitted to CSA Group or UL at any time. Revisions to this standard will be made only after processing according to the standards development procedures of CSA Group and UL. CSA Group and UL w
13、ill issue revisions to this standard by means of a new edition or revised or additional pages bearing their date of issue. ISBN 1-55436-830-8 2006 CSA Group All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher. This S
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17、nation of ANSI/UL 5085-1 as an American National Standard (ANSI) occurred on December 6, 2013. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page (front and back), or the Preface. Comments or proposals for revisions on any part of the Standard may be submitte
18、d to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. To purchase UL Standards, visit Comm 2000 at http:/m- or call toll-free 1-888-853-3503.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION
19、 OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS Preface .5 1 Scope .7 2 Denitions .8 3 General 9 3.1 Components .9 3.2 Reference Publications .10 3.3 Units of Measurement 10B 4 Construction .10B 5 Mechanical Assembly .10B 6 Enclosures 13 6.1 General 13 6.2 Nonmetallic enclosures .14 6.3 Enclosu
20、res specic environmental conditions .15 6.4 Mounting 15 6.5 Openings .16 6.6 Barriers for openings 17 6.7 Covers .17 7 Corrosion Resistance .18 8 Connections .20 8.1 General 20 8.2 Wiring terminals .20 8.3 Wire-binding screws and studs 20 8.4 Pressure terminal connectors .21 8.5 Leads 22 9 Internal
21、Wiring .22 10 Grounding .22 11 Spacings and Insulation .24 11.1 General .24 11.2 Insulating material for mounting of low voltage live parts .25 11.3 Coil insulation 25 11.4 Insulation used in lieu of spacings 26 11.5 Double insulation .28 12 Switches, Protective Devices, and Wiring Devices 28 12.1 G
22、eneral .28 12.2 Switches 28 12.3 Protective devices 28A 13 Current-Carrying Parts .28A 14 Cord-Connected Transformers 28B 15 Strain Relief 28B 16 Bushings for Low Voltage Wiring .29 17 Markings .31 17.1 General .31 17.2 Miscellaneous .32 18 Tests 33 19 Insulating Barriers Test 34 20 Pullout, Bending
23、, and Twisting Tests .34 21 Bonding Conductor Test .34 22 Moisture Absorption Test 35 23 Hot, Flaming Oil Test 35 DECEMBER 6, 2013 CSA C22.2 NO. 66.1-06 UL 5085-1 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 24 Enclosure Tests 36 24.1 Ge
24、neral .36 24.2 Compression test .36 24.3 Outlet box cover support and impact tests .37 24.4 Polymeric enclosure impact test .37 25 Induced Potential .38 26 Temperature (Heating) Test 38 Annex A (Informative) A1 Production Line Dielectric Voltage Withstand Test 52 A2 Production Line Grounding Continu
25、ity Test 53 Annex B (Informative) B1 Component Standards 54 Annex C (Informative) C1 French Translation of Markings 55 DECEMBER 6, 2013 CSA C22.2 NO. 66.1-06 UL 5085-1 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Preface This is the harm
26、onized CSA Group and UL standard for low voltage transformers. It is the rst edition of CSA C22.2 No. 66.1 and the rst edition of UL 5085-1. This harmonized standard has been jointly revised on December 6, 2013. For this purpose, CSA Group and UL are issuing revision pages dated December 6, 2013. Th
27、is harmonized standard was prepared by a Technical Harmonization Committee comprised of members from CSA Group, Underwriters Laboratories Inc. (UL), and representatives of the low voltage transformer manufacturing industry. The efforts and support of members of the Technical Harmonization Committee
28、are gratefully acknowledged. This Standard is considered suitable for use for conformity assessment within the stated scope of the Standard. This standard was reviewed by the CSA Subcommittee on C22.2 No. 66, under the jurisdiction of the CSA Technical Committee on Industrial Products and the CSA St
29、rategic Steering Committee on Requirements for Electrical Safety, and has been formally approved by the CSA Technical Committee. This Standard has been approved by the American National Standards Institute (ANSI) as an American National Standard. Where reference is made to a specic number of samples
30、 to be tested, the specied number is to be considered a minimum quantity. Note: Although the intended primary application of this standard is stated in its scope, it is important to note that it remains the responsibility of the users of the standard to judge its suitability for their particular pur
31、pose. Level of harmonization This standard uses the IEC format but is not based on, nor is it to be considered equivalent to, an IEC standard. This standard is published as an equivalent standard for CSA Group and UL. An equivalent standard is a standard that is substantially the same in technical c
32、ontent, except as follows: Technical national differences are allowed for codes and governmental regulations as well as those recognized as being in accordance with NAFTA Article 905, for example, because of fundamental climatic, geographical, technological, or infrastructural factors, scientic just
33、ication, or the level of protection that the country considers appropriate. Presentation is word for word except for editorial changes. Reasons for Differences from IEC The Technical Harmonization Committee identied the following IEC Standard within the scope of this standard: IEC 61558-1 (1998-07),
34、 Safety of power transformers, power supply units, and similar - Part 1: General requirements. The THC determined that the safe use of transformers and reactors is critically dependent on the electrical system in which they are intended to be installed. Signicant investigation is required to assess
35、safety and system compatibility issues that may lead to harmonization of traditional North American transformers and reactors with those presently addressed in the known IEC standards. The THC agreed such future investigation might be facilitated by completion of harmonization of North American stan
36、dards for transformers and reactors. DECEMBER 6, 2013 CSA C22.2 NO. 66.1-06 UL 5085-1 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Interpretations The interpretation by the standards development organization of an identical or equivalent
37、 standard is based on the literal text to determine compliance with the standard in accordance with the procedural rules of the standards development organization. If more than one literal interpretation has been identied, a revision is to be proposed as soon as possible to each of the standards dev
38、elopment organizations to more accurately reect the intent. CSA Group Effective Date The effective date for CSA Group will be announced through CSA Informs or a CSA Group certication notice. UL Effective Date This Standard is now in effect. Parts The Standard for Low Voltage Transformers is divided
39、into the following parts: Part Number Standard Title Standard Number 1 General Requirements CSA C22.2 No. 66.1/UL 5085-1 2 General Purpose Transformers CSA C22.2 No. 66.2/UL 5085-2 3 Class 2 and Class 3 Transformers CSA C22.2 No. 66.3/UL 5085-3 NOTES 1. Part 1 covers the general requirements for tra
40、nsformer characteristics, marking, construction, and tests. Additional specic requirements are provided in the subsequent parts. 2. Part 2 and Part 3 supplement requirements and/or modify the corresponding clauses in Part 1 and should be applied together with Part 1. The numbered clauses in Part 2 a
41、nd Part 3 correspond to the numbered clauses in Part 1. NOVEMBER 30, 2012 CSA C22.2 NO. 66.1-06 UL 5085-1 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL PART 1: GENERAL REQUIREMENTS 1 Scope 1.1 These requirements cover the following types
42、of transformers: a) Air-cooled transformers and reactors for general use; b) General purpose autotransformers; c) Ferroresonant transformers; d) Class 2 and Class 3 transformers (which are evaluated in accordance with Part 3); e) Cord-connected transformers (which are evaluated in accordance with Pa
43、rt 2); f) Transformers incorporating overcurrent or over-temperature protective devices, transient voltage surge protectors, or capacitors; and g) Permanently-connected transformers. 1.2 These transformers are intended to be used in accordance with the National Electrical Code, ANSI/NFPA 70, or CSA
44、C22.1, the Canadian Electrical Code, Part I. The Canadian Electrical Code denes low voltage as any voltage from 31 to 750 V inclusive and high voltage as any voltage above 750 V. The National Electrical Code, ANSI/NFPA 70, denes low voltage as any voltage up to 600 V, nominal. Therefore, low voltage
45、 transformers intended for use in Canada may be rated above 600 V up to 750 V. Low voltage transformers intended for use in the United States are rated up to 600 V. Where information in clauses and tables in this standard reference voltage ranges, the limit of 600 V applies in the United States, whi
46、le the limit of 750 V applies in Canada. 1.3 The standard does not cover the following transformers: a) Direct plug-in types; b) Neon; c) Liquid-immersed; d) Variable voltage (Variac); e) Low voltage landscape; f) Swimming pool and spa: g) Ignition; h) High intensity lighting; i) Toy; j) Fluorescent
47、 lamp types; APRIL 17, 2006 CSA C22.2 NO. 66.1-06 UL 5085-1 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL k) Transformers for welders; l) Distribution; m) Transformers intended for use in the United States with a nominal primary rating of
48、 more than 600 V; n) Transformers incorporating rectifying or waveshaping circuitry; o) Transformers for use with radio- and television-type appliances; p) Transformers intended for use in the United States having overvoltage taps rated over 660 V; q) Autotransformers used in industrial control equi
49、pment, which are evaluated in accordance with the requirements of the Standard for Industrial Control Equipment, UL 508, or CSA C22.2 No. 14, Industrial Control Equipment; and r) Other special types of transformers covered in requirements for other electrical devices or appliances. 1.4 Part 1, as well as Part 2 and Part 3, establish the characteristics, construction, operating conditions, markings, and test conditions for each type of transformer. 1.5 The r
