UL 2735-2013 UL Standard for Safety Electric Utility Meters (First Edition Reprint with Revisions Through and Including October 6 2014)《电气公用电表》.pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 2735 Electric Utility MetersUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRO

2、DUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Electric Utility Meters, UL 2735 First Edition, Dated May 30, 2013 Summary of Topics This revision of UL 2735 includes the update of minimum layer thickness for 300V. Text that has been changed in any manner or impacted by

3、 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. The revi

4、sed requirements are substantially in accordance with Proposal(s) on this subject dated January 27, 2014. 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 othe

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9、ving future effective dates as indicated in the note following the affected item. 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that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. OCTOBER 6, 2014 UL 2735 tr1UL COPYRIGHT

10、ED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 6, 2014 UL 2735 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 30, 2013 (Title Page Reprinted: October 6, 201

11、4) 1 UL 2735 Standard for Electric Utility Meters Prior to the rst edition, the requirements for the products covered by this standard were included in the Outline of Investigation for Electric Utility Meters, UL 2735. First Edition May 30, 2013 This UL Standard for Safety consists of the First Edit

12、ion including revisions through October 6, 2014. 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 http:/. ULs Standards for Safe

13、ty 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 regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2014 UNDERWRITERS LABORATORIES INC.UL CO

14、PYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JANUARY 9, 2014 ELECTRIC UTILITY METERS - UL 2735 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTI

15、ON 1 Scope .5 2 Glossary .5 3 Units of Measurement .6 4 Components 7 5 Undated References 7 CONSTRUCTION 6 General 7 7 Enclosure 8 7.1 General .8 7.2 Access panels .9 8 Clearance and Creepage Distances .9 9 Current Transformers .12 10 Batteries and Battery Charging .12 11 Load Control Switches 13 12

16、 Printed Wiring Boards .13 PERFORMANCE 13 General 13 14 Testing in SINGLE FAULT CONDITION .14 14.1 General .14 14.2 Application of fault conditions 14 14.3 Duration of tests .15 14.4 Conformity .15 15 Tests based on ANSI C12.1 .15 16 Flammability 127 mm (5 inch) Flame 18 16.1 General .18 16.2 Test s

17、pecimens and conditioning .18 16.3 Test equipment 18 16.4 Test method .19 16.5 Assessment of test results .20 17 Extended Overvoltage Test 21 18 Mechanical Tests .21 18.1 Static test .21 18.2 Impact test 23 18.3 Drop test 25 18.4 Conformity .25 RATINGS 19 General 25 MARKINGS 20 General 26 JANUARY 9,

18、 2014 ELECTRIC UTILITY METERS - UL 2735 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INSTRUCTIONS 21 General 27 APPENDIX A Standards For Components.A1 MAY 30, 2013 ELECTRIC UTILITY METERS - UL 2735 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED

19、 FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover the electrical safety of electric utility (revenue) meters rated up to 600 V, which measure, monitor, record, transmit, or receive electrical energy generation or consumption inform

20、ation. 1.2 Meters covered by this standard may be provided with one or two-way communication capabilities, by means of carrier signals, telephone, cable, wireless communication, or other methods. 1.3 These meters may additionally provide signals, either by direct connection or wirelessly, for the co

21、ntrol of electrical loads or electrical power generation equipment in response to signals received from the utility or local communication networks. 1.4 These requirements cover socket mounted plug-in (Type S) utility meters, and non-socket mounted, bottom connected (Type A) utility meters, intended

22、 for installation in ordinary (non-classied) locations. These may or may not be intended to be under the exclusive control of the serving utility. 1.5 These requirements also cover revenue meters that are not socket mounted (Type S) or bottom connected (Type A) meters, including those that are inten

23、ded for factory installation as components within the enclosure of complete equipment. 1.6 These requirements do not cover equipment intended as test equipment or equipment intended to make measurements for analysis in a laboratory or industrial setting. 2 Glossary 2.1 For the purpose of this standa

24、rd, the following denitions apply. 2.2 ACCESS PANEL A panel or door that may be opened or removed to provide access to a portion of the meter interior. 2.3 BOTTOM-CONNECTED METER (Type “A” Meter or “A-Base” Meter) A non-detachable meter that is connected using wiring terminals on bottom of the meter

25、. 2.4 CLEARANCE The shortest distance in air between two conductive parts. 2.5 COVER A portion of the meter that mates with the meter base to form a complete enclosure. The cover is typically transparent or has a transparent portion that allows the meter display to be viewed. 2.6 CREEPAGE DISTANCE T

26、he shortest distance along the surface of a solid insulating material between two conductive parts. 2.7 DETACHABLE METER (Type “S” Meter) A socket type meter, intended to plug into a meter socket or similar equipment. 2.8 ENCLOSURE The exterior portion of a meter that prevents access to live parts w

27、hen the meter is properly installed. For example, the enclosure of a typical Type S meter consists of the meter cover and the meter base. JANUARY 9, 2014 ELECTRIC UTILITY METERS - UL 2735 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2.9

28、ISOLATED SECONDARY CIRCUIT A circuit having no direct connection to the mains circuit, that derives its power from a transformer, converter or equivalent isolation device, or from a battery. 2.10 LOAD CONTROL SWITCH A device, normally external to the meter, that is intended to energize or de-energiz

29、e an electrical appliance or other device based on a signal provided by the meter. 2.11 MAINS An electricity supply system to which the equipment concerned is designed to be connected for the purpose of powering the equipment. 2.12 MAINS CIRCUIT A circuit which is intended to be directly connected t

30、o the MAINS for the purpose of powering the equipment. 2.13 NORMAL USE Operation, including stand-by, according to the instructions for use or for the obvious intended purpose. 2.14 REVENUE METER A meter intended to measure energy usage for billing purposes. A revenue meter may be used as the main m

31、eter for an electrical service, or may be a submeter. 2.15 SERVICE SWITCH A device internal to the meter that is intended to energize or de-energize the load terminals of the meter. 2.16 SINGLE FAULT CONDITION A condition in which one means for protection against a risk of re or shock is defective o

32、r one fault is present which could cause a risk of re or shock. 2.17 SUBMETER A meter intended for installation on the load side of the main utility meter for an electrical service. Submeters are intended to measure energy usage for a portion of the service to a premise. These devices include meters

33、 intended to measure electrical energy usage for subdivided billing, including energy consumption of individual loads and appliances. 2.18 UTILITY METER A revenue meter intended for installation by an electric utility. 3 Units of Measurement 3.1 Values stated without parentheses are the requirement.

34、 Values in parentheses are explanatory or approximate information. MAY 30, 2013 ELECTRIC UTILITY METERS - UL 2735 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4 Components 4.1 Other than as indicated in 4.2, a component of a product cove

35、red by this Standard shall comply with the requirements for that component. See Appendix A for a list of standards covering typical components used in the products covered by this Standard. 4.2 A component need not comply with a specic requirement that: a) Involves a feature or characteristic not ne

36、eded in the application of the component in the product covered by this Standard; or b) Is superseded by a requirement in this Standard. 4.3 A component shall be used in accordance with its recognized rating established for the intended conditions of use. 4.4 Specic components are recognized as bein

37、g incomplete in construction features 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 for which they have been recognized. 5

38、Undated References 5.1 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 code or standard. CONSTRUCTION 6 General 6.1 Other than as noted in 6.2, a type A or type S meter shall be of one of the f

39、orm designations and current classes described in the Standard for Electric Meters Code for Electricity Metering, ANSI C12.10, and shall comply with all the requirements of ANSI C12.10. 6.2 When intended for installation by a specic utility and when agreeable to all parties concerned, special forms

40、and current classes are not prohibited. When special forms are utilized the meter shall: a) Be provided with a wiring diagram on a label affixed adjacent to the wiring compartment; b) Be evaluated in combination with the intended mounting socket (if socket mounted); and c) Be marked to indicate the

41、socket with which it is intended to be used. 6.3 A meter intended for factory installation as a component of complete equipment need not comply with the form designations in ANSI C12.10, but shall comply with all other requirements of ANSI C12.10 when installed in the complete equipment. MAY 30, 201

42、3 ELECTRIC UTILITY METERS - UL 2735 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 6.4 Detachable meters shall be provided with connecting blades having dimensions as described in ANSI C12.10. 6.5 Terminals shall be arranged to reduce the

43、possibility of short circuits during meter connection, adjustment of the meter, or removal or replacement of the cover. The blades of a meter having a standard conguration as described in ANSI C12.10 are considered to meet this requirement. 6.6 Terminals for connection to isolated secondary circuits

44、 during installation shall be located such that the wiring connected to these terminals may be reliably routed away from live parts of the mains circuit, such that the creepage and clearance requirements between mains and secondary circuits are maintained. 6.7 Meters provided with wiring leads for c

45、onnection of secondary circuits during installation shall comply with 6.7(a) through (c): a) Wiring leads shall be insulated for the highest rated voltage of the meter, or shall be routed and secured away from live parts of the mains circuit, such that the creepage and clearance requirements between

46、 mains and secondary circuits are maintained; b) Wiring leads shall be protected against abrasion and sharp bends at the point where the conductors enter the equipment, by an inlet or bushing with a smoothly rounded opening; and c) Wiring leads shall be secured to relieve the conductors from strain,

47、 including twisting, where they are connected within the meter. Knots in conductors shall not be used as strain relief. It shall not be possible to push the cord into the equipment to an extent which could damage the conductor or cause a risk of re or shock. 6.8 A meter may have provision for adjust

48、ments during service. Such adjustments shall be accessible without disassembly of the meter other than removal of the cover. 7 Enclosure 7.1 General 7.1.1 The enclosure of a meter shall completely enclose all live parts, other than parts that are enclosed by the meter base when the meter is properly

49、 installed. 7.1.2 Meter enclosures incorporating polymeric materials shall comply with the requirements of the Standard for Polymeric Materials Use in Electrical Equipment Evaluations, UL 746C as applied to permanently installed equipment. 7.1.3 The enclosure of a utility meter intended for use indoors shall comply with the performance requirements of the Standard for Enclosures for Electrical Equipment, Environmental Considerations, UL 50E, for Type 2 enclosures. A meter marked with