1、NEMA Standards PublicationNational Electrical Manufacturers AssociationANSI C12.6-1987 (R2012)Phase-Shifting Devices Used In Metering, Marking and Arrangement of TerminalsANSI C12.6-1987 (R2002, R2012) Page ii NOTICE AND DISCLAIMER The information in this publication was considered technically sound
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11、ement. ANSI C12.6-1987 (R2002, R2012) Page iii AMERICAN NATIONAL STANDARD Approval of an American National Standard requires verification by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. Consensus is established when,
12、 in the judgment of the ANSI Board of Standards Review, substantial agreement has been reached by directly and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, a
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14、r procedures not conforming to the standards. The American National Standards Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American Na
15、tional Standard in the name of the American National Standards Institute. Requests for interpretations should be addressed to the secretariat or sponsor whose name appears on the title page of this standard. Caution Notice: This American National Standard may be revised or withdrawn at any time. The
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17、e American National Standards Institute. Published by National Electrical Manufacturers Association 1300 North 17th Street, Suite 1847, Rosslyn, VA 22209 Copyright 2011 by the National Electrical Manufacturers Association. All rights reserved including translation into other languages, reserved unde
18、r the Universal Copyright Convention, the Berne Convention for the Protection of Literary and Artistic Works, 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 wri
19、tten permission of the publisher. Printed in the United States of America. ANSI C12.6-1987 (R2002, R2012) Page iv This page intentionally left blank. ANSI C12.6-1987 (R2002, R2012) Page v Foreword (This Foreword is not a part of ANSI C12.6-1987, American National Standard for Marking and Arrangement
20、 of Terminals for Phase-Shifting Devices Used in Metering.) This standard was developed by the Accredited Standards Committee on Electricity Metering, C12, for full consensus approval as an American National Standard. This revised version supercedes ANSI C12.6-1978. Suggestions for improvements of t
21、his standard will be welcomed. They should be sent to the American National Standards Institute 1430 Broadway New York, NY 10018 Subcommittee 15 of ANSI Committee C12 which developed and revised this standard, had the following members: F.A. Marta, Chairman F. Huber, Jr, Secretary A.G. Aschenbeck J.
22、 Foster J.H. Keeler F.W. Bagley C.R. Green C.R. Mudnerback W.C. Busch C.F. Hawkes S.D. Murphy J.T. Donahue W.R. Keyes T.G. Willis M.F. Faser C. Ivan J. Young At the time this standard was processed and approved, the American National Standards Committee C12 had the following members: R.S. Turgel, Ch
23、airman F. Huber, Jr, Secretary Organization Represented Name of Representative Institute of Electrical and Electronics Engineers. . . . . . . . . . . .F.J. Levitsky R. Hopkins National Bureau of Standards. . . . . . . . . . . . . . . . . . . . . R.S. Turgel National Electrical Manufacturers Associat
24、ion. . . . . . . . . . . . .T.C. Drew L. Struchtemeyer J.H. Keeler, Jr R.M. Walden (Alt) F.A. Marta R.H. Stevens (Alt) J.C. Reich (Alt) H.L. Friend J.A. Gauthier (Alt) W.J. Zisa (Alt) Electric Light and Power Group. . . . . . . . . . . . . . . . . . . . W.C. Busch D.B. Berry D. Dassman C.R. Jones R.
25、M. Reesey D.E. Soffrin (Alt) Public Service Commissions. . . . . . . . . . . . . . . . . . . . C.J. Six G.F. Walsh Rural Electrification. . . . . . . . . . . . . . . . . . . . . . . . . . P.F.B. Jackson ANSI C12.6-1987 (R2002, R2012) Page vi American Public Power Association. . . . . . . . . . . . .
26、 . . . . C.R. Gomez H. Carey Jones Underwriters Laboratories, Inc. . . . . . . . . . . . . . . . . . . . W. Menuz J.W. Hogg (Alt) ANSI C12.6-1987 (R2002, R2012) Page vii Contents SECTION PAGE 1. Scope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2. Terminal Mark
27、ing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.1 Devices for Specific Types of Services. . . . . . . . . . . . . . . . . 5 2.2 Universal Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 3. Terminal Arrangements. . . . . . . . . . . . . . . . . . . .
28、 . . . . . . . . . . .5 4. Character of Terminal Markings. . . . . . . . . . . . . . . . . . . . . . . . 5 5. Number of Terminals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 6. Diagrams of Internal Connections. . . . . . . . . . . . . . . . . . . . . . .5 FIGURES Fig 1 Standardi
29、zed Terminal Markings for Phase-Shifting Devices Designed for Application on Specific Types of Services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Fig 2 Application of a Universal Phase-Shifting Device on Common Types of Services. . . . . .7 Fig 3 Standardized Terminal Arrangements
30、for Phase-Shifting Devices. 8 ANSI C12.6-1987 (R2002, R2012) Page viii ANSI C12.6-1987 (R2002, R2012) Page 5 American National Standard for Marking and Arrangement of Terminals for Phase-Shifting Devices Used in Metering 1. Scope This specification applies to phase-shifting devices designed to provi
31、de the proper lagged voltages required for kvar and kVA measurement. 2. Terminal Marking 2.1 Devices for Specific Types of Services. Phase-shifting devices designed primarily for use on a specific type of circuit shall be so connected internally that the external marked terminals will satisfy the co
32、nditions of Fig. 1 for the common types of services shown as examples. For types of circuits not shown, the same general system of corresponding voltages shall also be applied for 1-2-3 phase sequence and lagging current. That is: (a) Terminals marked 4 to 5 shall provide the voltage of proper magni
33、tude and phasor relationship with respect to supply voltage 1 to 2 or 1 to 0. (b) Terminals marked 6 to 7 shall provide the proper voltage with respect to 3 to 2 or 2 to 0. (c) Terminals marked 8 to 9 shall provide the proper voltage with respect to 3 to 0. (d) Where one voltage element is to be omi
34、tted in metering a 4-wire service, terminals marked 4 to 5 and 8 to 9 shall still provide the proper remaining two voltages, with the voltages, with the voltages 2 to 0 and 6 to 7 considered eliminated. 2.2 Universal Devices. Phase-shifting devices designed for use on a variety of circuits shall be
35、so connected internally that the external marked terminals will satisfy the conditions shown under the 3-phase, 3-wire type of service in Fig.1 and 2. Examples of other applications of a typical universal phase-shifting device are shown in Fig. 2, but details of internal connections and methods need
36、 not conform to those indicated for these other types of services. 3. Terminal Arrangements External terminal of phase-shifting devices shall be arranged in the sequence and general position shown in Fig. 3(a). Where the phase-shifting device is designed in a simple level-plan manner on a panel base
37、board with a built-in test switch, the terminals may be arranged as shown in Fig. 3(b). 4. Character of Terminal Markings The identification numerals shall be marked in a legible and durable manner on the base or enclosure of the phase-shifting device. The markings shall be so placed adjacent to the
38、 terminals that they unmistakably identify the proper terminals. In case of phase-shifting devices with multiple lagged-voltage or output terminals for use at fixed power-factor ranges in kVA measurement, each corresponding output terminal need not be marked separately with duplicate numerals: but c
39、orresponding terminals may be arranged in columns or groups, which shall be identified in a clear and unmistakable manner. 5. Number of Terminals In general, the number of external terminals to be provided on the phase-shifting devices shall correspond to that shown to be required in columns 2 and 4
40、 of Fig.1 for line connections and voltage connections. Where the device does not include a built-in test switch or the number of line connections actually required is less than the number of service wires of the circuit for which the device is designed, the terminals not needed may be omitted, but
41、the standard system of terminal identification shall be retained. 6. Diagrams of Internal Connections Complete diagrams of internal connections shall be made available by the manufacturer for each type of device produced. In the case of the universal types of devices, such diagrams shall be provided
42、 in a legible and durable manner on the inside or outside of the covers. ANSI C12.6-1987 (R2002, R2012) Page 6 ANSI C12.6-1987 (R2002, R2012) Page 7 ANSI C12.6-1987 (R2002, R2012) Page 8 NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION 1300 NORTH 17TH STREET, SUITE 900 ROSSLYN. VA 22209www.NEMA.orgTO ORDER ADDITIONAL NEMA STANDARDS VISITWWW.GLOBAL.IHS.COM OR CALL 1-800-854-7179/1-303-397-79565612_0514TB
