NEMA C12 1-2014 Electric Meters Code for Electricity Metering (Includes Incorporated Errata 06 07 2016).pdf

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1、NEMA Standards Publication National Electrical Manufacturers Association ANSI C12.1-2014 Electric Meters Code for Electricity Metering To: Current Holders of ANSI C12.1-2014 From NEMA Commmunications Department Date: 6/7/2016 Subject: Errata to ANSI C12.1-2014 Code for Electricity Metering The curre

2、nt publication of ANSI C12.1-2014 Code for Electricity Metering has some changes that were corrected. A brand new PDF of the standard has been provided. Please use the attached PDF to update this for your records. I will make the necessary changes on the NEMA website. Best, Ann Brandstadter 703-841-

3、3217 ANSI C12.1-2014 American National Standard for Electric Meters Code for Electricity Metering Secretariat: National Electrical Manufacturers Association Approved: February 1, 2016 American National Standards Institute, Inc. ANSI C12.1-2014 Page 2 2016 National Electrical Manufacturers Associatio

4、n NOTICE AND DISCLAIMER The information in this publication was considered technically sound by the consensus of persons engaged in the development and approval of the document at the time it was developed. Consensus does not necessarily mean that there is unanimous agreement among every person part

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20、rican National Standards Institute, Inc. Published by National Electrical Manufacturers Association 1300 North 17 thStreet, Suite 900 Rosslyn, Virginia 22209 2016 National Electrical Manufacturers Association All rights, including translation into other languages, reserved under the Universal Copyri

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22、lisher. Printed in the United States of America ANSI C12.1-2014 Page ii 2016 National Electrical Manufacturers Association FOREWORD (This foreword is not part of American National Standard C12.1-2014) This version of C12.1 has been modified in several areas in an effort to respond to a changing indu

23、stry and to improve the clarity of some of the tests. This standard continues to form the basic requirement for all kilowatt-hour metering devicesboth electronic and electromechanical. Another standard in this series, ANSI C12.20, provides different test tolerances and a few different tests that are

24、 required for higher accuracy meters that adhere to Blondels theorem. To offer an option for non-Blondel meter forms, tolerance specifications for 0.5% accuracy class meters have been added to this standard. Most other specifications have been retained from the previous edition. Changes to the tempe

25、rature rise test were made to make testing consistent with the tests in the meter socket standard, ANSI C12.7. Section 5, Standards for New and In-Service Performance, and Appendix D were extensively updated to reflect current practices. For several of the tests, specific details for successful tole

26、rance criteria have been modified, and test requirements for bidirectional metering have been added. Some definitions were also added and references to external documents were updated. The Secretariat of the Accredited Standards Committee on Electricity Metering, C12, is held by the National Electri

27、cal Manufacturers Association (NEMA) and the National Institute of Standards and Technology. At the time this standard was processed and approved, the C12 Committee had the following members: Tom Nelson, Chairman Paul Orr, Secretary Organization Represented Name of Representative Alabama Power Co. D

28、erl Rhoades Ameren Services James West Baltimore Gas and Electric Co. Jim Thurber Central Hudson Gas & Electric Brett Arteta Consumers Energy David Jirikovic DTE Energy Kostas Tolios Duke Energy Tim Morgan Elevate Energy Lawrence Kotewa Elster Solutions, LLC Scott Weikel EnerNex LLC Aaron Snyder Flo

29、rida Power and Light Co. Jim DeMars Future DOS R&D Inc. Avygdor Moise General Electric, Energy Curt Crittenden Itron, Inc. Brent Cain Landis+Gyr, Inc John Voisine MET Laboratories, Inc. Jim Reed Milbank Manufacturing Co. Shawn Glasgow National Institute of Standards And Technology Tom Nelson Northea

30、st Utilities Gordon Belcher Oncor Electric Delivery Brad Johnson Pacific Gas and Electric Co D. Young Nguyen Power Measurements William Hardy Public Service Electric & Gas David Ellis Radian Research, Inc Shannon Edwards SAIC David Scott Schweitzer Engineering Labs Travis Mooney Sensus Metering Kenn

31、y ODell Silver Spring Networks Kam Oza Technology for Energy Corp. Steve Hudson TESCO Tom Lawton ANSI C12.1-2014 Page iii 2016 National Electrical Manufacturers Association Trilliant Networks Michel Veillette Tucker Engineering Richard Tucker Underwriters Laboratory , LLC Scott Hunter Watthour Engin

32、eering Lea Wren Xcel Energy Dan Nordell The following members of the C12.1 Committee were actively involved in the revision of this standard: S. Weikel, Past-Chairman G. Belcher, Chairman M. Anderson L. Barto G. Belcher S. Bleier F. Boudreau B. Cain C. Crittenden W. Cross J. DeMars K. Dimpfl S. Edwa

33、rds D. Gunderson W. Hardy M. Hoffman S. Hunter D. Jirikovic B. Johnson L. Kotewa T. Lawton H. Millican T. Mooney T. Morgan T. Nelson D. Nguyen D. Nordell K. ODell A. Rashid J. Reed W. Rose A. Snyder F. Solomon D. Tucker J. Voisine S. Weikel J. West L. Wren In addition, the Editorial Committee for th

34、e current Revision of C12.1 includes the following: William Hardy Gordon Belcher Curt Crittenden Frank Boudreau Scott Weikel ANSI C12.1-2014 Page iv 2016 National Electrical Manufacturers Association ANSI C12.1-2014 Page v 2016 National Electrical Manufacturers Association CONTENTS Section 1 SCOPE A

35、ND REFERENCES . 1 1.1 Scope 1 1.2 References 1 Section 2 DEFINITIONS . 3 Section 3 STANDARDS AND STANDARDIZING EQUIPMENT . 12 3.1 General . 12 3.2 Traceability paths to the International System of Units, SI . 12 3.2.1 Direct transfer . 12 3.2.1.2 Independent laboratory . 12 3.2.1.3 Meter laboratory

36、transport standard comparison to a NMI . 12 3.2.1.4 Indirect transfer . 12 3.3 Meter laboratory 12 3.3.1 Laboratory conditions . 12 3.3.2 Reference temperature and humidity. 13 3.3.3 Laboratory power sources . 13 3.4 Meter shop 13 3.5 Laboratory standards 13 3.5.1 Basic reference standards . 13 3.5.

37、2 Transport standards . 13 3.6 Periodic verification of reference standards 13 3.7 Portable/field/working standard watthour meters 13 3.8 Performance records. 13 3.9 Performance requirements for standard watthour meters 14 3.9.1 General test conditions 14 3.9.1.1 Test voltage. 14 3.9.1.2 Test curren

38、t . 14 3.9.1.3 Test phase angle 14 3.9.1.4 Test frequency 14 3.9.1.5 Waveform distortion 14 3.9.1.6 Ambient temperature 14 3.9.1.7 External magnetic field 14 3.9.2 Accuracy tests for portable and reference standards 15 3.9.2.1 Insulation . 15 3.9.2.2 Accuracy specification for the effect of variatio

39、n of voltage and current . 15 Section 4 ACCEPTABLE PERFORMANCE OF NEW TYPES OF ELECTRICITY METERS AND ASSOCIATED EQUIPMENT . 16 4.1 General . 16 4.1.1 Acceptable meters . 16 4.1.2 Adequacy of testing laboratory 16 4.1.3 Retesting of new meter type 16 4.1.4 Test documentation . 16 4.1.5 Test device .

40、 16 ANSI C12.1-2014 Page vi 2016 National Electrical Manufacturers Association 4.1.6 Tests performed in series 16 4.1.7 Handling of failed device 16 4.1.8 Restart testing 16 4.1.9 Reporting of test meters . 16 4.2 Types of meters 17 4.2.1 Basic type . 17 4.2.2 Variations within the basic type 17 4.2

41、.3 Type designation 17 4.2.4 Acceptance of basic types in whole or part . 17 4.2.5 Minor variations 17 4.2.6 Special types 17 4.3 Specifications for design and construction . 17 4.3.1 Sealing 17 4.3.2 Enclosures . 17 4.3.3 Terminals and markings . 17 4.3.4 Construction and workmanship 18 4.3.5 Provi

42、sion for adjustment 18 4.4 Selection of meters for approval tests. 18 4.4.1 Samples to be representative of the basic type . 18 4.4.2 Number to be tested 18 4.5 Conditions of test 18 4.5.1 Tests to be applied . 18 4.5.2 Configuration 18 4.5.3 Meters for special services 18 4.5.4 Meters of non-standa

43、rd classes . 18 4.5.5 Meters with wide-voltage range . 19 4.6 Rules governing the acceptance of types . 19 4.6.1 Tolerances . 19 4.6.2 Determination of failure and rejection 19 4.6.2.1 Failure 19 4.6.2.2 Meter type certification rejection criteria . 19 4.7 Performance requirements . 20 4.7.1 Test co

44、nditions . 20 4.7.2 Accuracy TestsInternal influences 22 4.7.2.1 Test No. 1: No load . 22 4.7.2.2 Test No. 2: Starting load . 22 4.7.2.3 Test No. 3: Load performance 22 4.7.2.4 Test No. 4: Effect of variation of power factor . 23 4.7.2.5 Test No. 5: Effect of variation of voltage on the meter . 27 4

45、.7.2.6 Test No. 6: Effect of variation of frequency . 28 4.7.2.7 Test No. 7: Equality of current circuits 28 4.7.2.7.1 Single-element meters: Equality of current circuits in the three- wire element 28 4.7.2.7.2 Multi-element meter: Equality of current circuits in the three- wire element 29 4.7.2.7.3

46、 Multi-element meter: Equality of current circuits between elements 30 4.7.2.8 Test No. 8: Meter losses 30 4.7.2.9 Test No. 9: Temperature rise 31 4.7.2.9.1 Test on class 10, 20, 100, 200, and 320 meters 32 4.7.2.10 Test No. 10: Effect of register friction 36 4.7.2.11 Test No. 11: Effect of internal

47、 heating . 36 4.7.2.12 Test No. 12: Effect of tilt. 37 4.7.2.13 Test No. 13: Stability of performance 37 4.7.2.14 Test No. 14: Independence of elements 37 ANSI C12.1-2014 Page vii 2016 National Electrical Manufacturers Association 4.7.3 Accuracy testsexternal influences performance verification 41 4

48、.7.3.1 Test No. 15: Insulation 41 4.7.3.2 Test No. 16: Voltage interruptions test . 41 4.7.3.3 Test No. 17: Effect of high voltage line surges . 41 4.7.3.4 Test No. 18: Effect of external magnetic field . 42 4.7.3.5 Test No. 19: Effect of variation of ambient temperature . 43 4.7.3.6 Test No. 20: Ef

49、fect of temporary overloads 45 4.7.3.7 Test No. 21: Effect of current surge in ground conductor . 46 4.7.3.8 Test No. 22: Effect of superimposed signals 46 4.7.3.9 Test No. 23: Effect of voltage variation-secondary time base 46 4.7.3.10 Test No. 24: Effect of variation of ambient temperature- secondary time base . 46 4.7.3.11 Test No. 25: Effect of electrical fast transient/burst test 47 4.7.3.11a Test No. 25a: Effect of electrical oscillatory SWC test 48 4.7.3.12 Test No. 26: Effect of radio frequency interference . 49 4.7.3.13