ANSI NEMA C12.11-2007 For Instrument Transformers for Revenue Metering 10kV BIL through 350 kV BIL (0.6 kV NSV through 69 kV NSV).pdf

1、NEMA Standards PublicationNational Electrical Manufacturers AssociationANSI C12.11-2006 (R2014)Instrument Transformers for Revenue Metering 10kV BIL through 350 kV BIL (0.6 kV NSV through 69 kV NSV)ANSI C12.11-2006 (R2014) American National Standard for Instrument Transformers for Revenue Metering 1

2、0kV BIL through 350 kV BIL (0.6 kV NSV through 69 kV NSV) Secretariat: National Electrical Manufacturers Association Approved: May 27, 2014 Published: June 27, 2014 American National Standards Institute, Inc. 2014 National Electrical Manufactures Association NOTICE AND DISCLAIMER (ANSI Accredited St

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20、 and the International and Pan American Copyright Conventions. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. Printed in the United States of America C12.11-2006 (R2014) Page ii 2014 Na

21、tional Electrical Manufactures Association C12.11-2006 (R2014) Page iii 2014 National Electrical Manufactures Association Contents Page 1 Scope 1 2 References . 1 3 Definitions . 1 3.1 Accuracy Class . 1 3.2 Indoor Applications of Instrument Transformers 1 4 General Requirements 1 4.1 IEEE Std C57.1

22、3 Provisions 1 4.2 Metric Conversion . 2 4.3 Space for User Identification . 2 4.4 Serial Numbers . 2 5 Current Transformers . 2 5.1 Nameplates . 2 5.1.1 Ratio Marking Syntax . 2 5.1.2 Ratio Marking . 2 5.1.3 Tapped-secondary Current Transformer Secondary Terminal Indication . 2 5.1.4 Indoor Applica

23、tion Rating Factor . 2 5.1.5 Bar Code 2 5.2 Primary Rating Marking on Body of Current Transformers 2 5.3 Terminals 3 5.3.1 Primary Terminals 3 5.3.2 Secondary Terminals and Voltage Terminals 3 5.4 Polarity Marking 3 5.4.1 Polarity Marking Permanence 3 5.4.2 Polarity Marking Contrast 3 5.4.3 Polarity

24、 Marking Relief . 3 5.4.4 Primary and Secondary Polarity Marks 3 5.4.5 Direct Burial Polarity Marking. 3 5.5 Test Card 3 5.6 Effect of Cooling Air Temperature on Permissible Temperature Rise for 55 C Rise Transformers 4 5.7 Indoor and Outdoor Current Transformers, 10 kV BIL (0.6 kV NSV) . 4 5.7.1 El

25、ectrical Characteristics and Dimensions 4 5.7.2 Current Ratings 4 5.8 Indoor Current Transformers, 60 kV BIL through 110 kV BIL (4.8 kV NSV through 14.4 kV NSV) . 12 5.8.1 Electrical Characteristics and Dimensions 12 5.8.2 Current Ratings 14 5.9 Outdoor Current Transformers, 60 kV BIL through 110 kV

26、 BIL (4.8 kV NSV through 14.4 kV NSV) . 14 5.9.1 Electrical Characteristics and Dimensions 14 5.9.2 Current Ratings 14 5.10 Small-Size Outdoor Current Transformers, 125 kV BIL through 200kV BIL (25 kV NSV through 34.5 kV NSV) . 14 5.10.1 Electrical Characteristics and Dimensions 14 5.10.2 Current Ra

27、tings 14 5.11 Large-Size Outdoor Current Transformers, 150 kV BIL through 350 kV BIL (25 kV NSV through 69 kV NSV) 15 5.11.1 Electrical Characteristics and Dimensions 15 5.11.2 Current Ratings 15 6 Voltage Transformers . 20 6.1 Terminals 20 6.1.1 Primary Terminals 20 C12.11-2006 (R2014) Page iv 2014

28、 National Electrical Manufactures Association 6.1.2 Secondary Terminals . 20 6.2 Identification 20 6.2.1 Terminal Identification 20 6.2.2 Rated Voltage Identification . 20 6.3 Test Card 20 6.4 Construction 20 6.4.1 Nameplates 20 6.4.2 Bar Code 21 6.5 Effect of Cooling Air Temperature on Permissible

29、Temperature Rise for 55 C Rise Transformers 21 6.6 Indoor or Outdoor Voltage Transformers, 10 kV and 30 kV BIL, and Indoor Voltage Transformers, 60 kV through 110 kV BIL . 21 6.6.1 Electrical Characteristics and Dimensions 21 6.6.2 Rated Voltages 21 6.7 Outdoor Voltage Transformers, 60 kV BIL throug

30、h 110 kV BIL 22 6.7.1 Electrical Characteristics and Dimensions 22 6.7.2 Rated Voltages 22 6.8 Small-Size Outdoor Voltage Transformers, with One Bushing, 125 kV through 200 kV BIL 25 6.8.1 Electrical Characteristics and Dimensions 25 6.8.2 Rated Voltages 26 6.9 Small-Size Outdoor Voltage Transformer

31、s, with Two Bushings, 125 kV through 200 kV BIL 26 6.9.1 Electrical Characteristics and Dimensions 26 6.9.2 Rated Voltages 26 6.10 Large-Size Outdoor Voltage Transformers, with One Bushing, 150 kV BIL through 350 kV BIL . 26 6.10.1 Electrical Characteristics and Dimensions 26 6.10.2 Rated Voltages 2

32、6 6.11 Large-Size Outdoor Voltage Transformers, with Two Bushings, 150 kV BIL through 350 kV BIL . 27 6.11.1 Electrical Characteristics and Dimensions 27 6.11.2 Rated Voltages 27 Annex A: Circle Method for Determination of Voltage Transformer Accuracy 31 Annex B: Suggested Utility Practices on Field

33、 Application of Current Transformers 33 B.1 Determination of 55 C Rise Current Transformer Capacity 33 B.2 Geographic Area . 33 B.3 Determination of 55 C Rise Current Transformer Replacement Need . 33 B.4 Determination of 55 C Rise Current Transformer Sizes for Specific Loading Conditions . 34 B.4.1

34、 Replacement of Existing CTs on Primary Service* (Primary Service is 2 kV or greater) . 34 B.4.2 Replacement of Existing CTs on Secondary Service (Secondary Service is 600 V or less) 34 Annex C: Bar Code . 35 C.1 Bar Code Characters 35 C.2 Bar Code Size and Format . 35 C.3 Bar Code Example 37 Annex

35、D: Historical Background . 38 D.1 Foreword to ANSI C12.11-1987 38 Tables 1 Current Ratings in Amperes for Small-Size Outdoor Current Transformers, 125 kV BIL through 200 kV BIL (25 kV NSV through 345 kV NSV) . 14 2 Current Ratings in Amperes for Large-Size, Outdoor Current Transformers, 150 kV BIL t

36、hrough 350 kV BIL (25 kV NSV through 69 kV NSV) 15 3 Electrical ratings for Indoor or Outdoor Voltage Transformers, 10 kV and 110 kV BIL . 21 4 Electrical Ratings for Small-Size Outdoor Voltage Transformers, with One Bushing, 125 kV through 200 kV BIL 26 C12.11-2006 (R2014) Page v 2014 National Elec

37、trical Manufactures Association 5 Electrical Ratings for Small-Size Outdoor Voltage Transformers, with Two Bushings, 125 kV through 200 kV BIL 26 6 Electrical Ratings for Large-Size Outdoor Voltage Transformers, with One Bushing, 150 kV through 350 kV BIL 27 7 Electrical Ratings for Large-Size Outdo

38、or Voltage Transformers, with Two Bushings, 150 kV through 350 kV BIL 27 Figures 1 Small-Size Window-Type Current Transformers, 10 kV BIL . 5 2 Intermediate-Size Window-Type Current Transformers, 10 kV BIL 6 3 Large-Size Window-Type Current Transformers, 10 kV BIL . 7 4 Large-Size Window-Type Curren

39、t Transformers, 10 kV BIL . 8 5 Small-Size Wound or Bar-Type Current Transformers, 10 kV BIL . 9 6 Intermediate-Size Wound or Bar-Type Current Transformers, 10 kV BIL 10 7 Large-Size Wound or Bar-Type Current Transformers 10 kV BIL 11 8 Window-Type Current Transformers, 10 kV BIL for Application in

40、Secondary Compartment of Pad-Mounted Distribution Transformers . 12 9 Indoor Current Transformers, 60 kV BIL through 110 kV BIL . 13 10 Outdoor Current Transformers, 60 kV BIL through 110 kV BIL 16 11 Small-Size Outdoor Current Transformers, 125 kV BIL through 200 kV BIL 17 12a Large-Size Outdoor Cu

41、rrent Transformers, 150 kV BIL through 350 kV BIL 18 12b Primary Terminal Dimensions for Large- Size Outdoor Current Transformers, 150 kV BIL through 350 kV BIL . 19 13 Indoor or Outdoor Voltage Transformers, 10 kV BIL through 30 kV BIL Indoor Voltage Transformers, 60kV BIL through 110 kV BIL 23 14

42、Outdoor Voltage Transformers, 60 kV BIL through 110 kV BIL 24 15 Small-Size Outdoor Voltage Transformers, with One Bushing, 125 kV BIL through 200 kV BIL . 25 16 Small-Size Outdoor Voltage Transformers, with Two Bushings, 125 kV BIL through 200 kV BIL . 28 17 Large-Size Outdoor Voltage Transformers,

43、 with One Bushing, 150 kV BIL through 350 kV BIL . 29 18 Large-Size Outdoor Voltage Transformers, with Two Bushings, 150 kV BIL through 350 kV BIL . 30 C12.11-2006 (R2014) Page vi 2014 National Electrical Manufactures Association C12.11-2006 (R2014) Page vii 2014 National Electrical Manufactures Ass

44、ociation Foreword (This Foreword is not part of American National Standard C12.11-2006 (R2014).) This Standard was developed by the Accredited Standards Committee on Electricity Metering, C12, for full consensus approval as an American National Standard. This revised edition supersedes ANSI C12.11-1

45、987. The new edition differs from the previous one in both technical and editorial content. Besides several minor revisions, technical changes include: increased focus on Current Transformer Rating Factors when ambient temperature is not 30 C, and revisions to Rating Factor and Burden & Accuracy per

46、formance to fit established industry practice. Editorial revisions included the redrawing of all figures. This Standard provides recommended minimum requirements for current and voltage transformers used for electricity metering. It is to be used in conjunction with the latest revision of IEEE C57.1

47、3 and IEEE Std C57.13.6. Comments on standards and requests for interpretations should be addressed to ANSI Committee C12 Secretary, National Electrical Manufacturers Association, 1300 North 17th Street, Rosslyn, Virginia, 22209. This Standard was processed and approved for submittal to ANSI by Accr

48、edited Standards Committee on Electricity Metering C12. Committee approval of the standard does not necessarily imply that all committee members voted for its approval. At the time of its approval, the C12 Committee had the following members: Tom Nelson, Chairman Paul Orr, Secretary Organization Rep

49、resented Name of Representative Ameren Services J. West Austin Energy H. Millican Baltimore Gas & Electric Company J. Thurber Center for Neighborhood Technology L. Kotewa Consumers Energy D. Jirikovic DTE Energy K. Tolios Duke Power Company T. Morgan Elster Solutions S. Weikel EnerNex Corporation A. Snyder Florida Power & Light J. DeMars Future DOS R&D Inc. A. Moise GE Energy C. Crittenden Georgia Power L. Barto Itron, Inc. B. Cain JECARRCO, LLC J. Carr Landis+Gyr J. Voisine MET Laboratories, Inc. J. Reed Milbank Manufacturing Co. S. Glasgow National Institute of