1、To: Current Holders of ANSI C12.6-1987From: NEMA Communications DepartmentDate: May 23, 2003Subject: Reaffirmation of ANSI C12.6-1987The ANSI Board of Standards Review reaffirmed ANSI C12.6-1987, “Phase-Shifting Devices Used in Metering, Marking and Arrangement of Terminals.“The new designator for t
2、his standard is: ANSI C12.6-1987 (R2002), “Phase-Shifting Devices Used in Metering, Marking and Arrangement of Terminals.“Please insert the attached revised title page into your standard.Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMANot for ResaleNo r
3、eproduction or networking permitted without license from IHS-,-,-ANSI CI 2.6-1 987 (Revision of ANSI CI 2.6-1 978) SHLl27 Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
4、ANSI C12.6-1987 (R2002)American National StandardPhase-Shifting Devices Used In Metering, Marking and Arrangement of TerminalsSecretariat:National Electrical Manufacturers AssociationApproved as anAmerican National Standards Institute, Inc.Copyright National Electrical Manufacturers Association Prov
5、ided by IHS under license with NEMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NOTICE AND DISCLAIMERThe information in this publication was considered technically sound by the consensus of persons engaged in the development and approval of the document at the t
6、ime it was developed. Consensus does not necessarily mean that there is unanimous agreement among every person participating in the development of this document.The National Electrical Manufacturers Association (NEMA) standards and guideline publications, of which the document contained herein is on
7、e, are developed through a voluntary consensus standards development process. This process brings together volunteers and/or seeks out the views of persons who have an interest in the topic covered by this publication. While NEMA administers the process and establishes rules to promote fairness in t
8、he development of consensus, it does not write the document and it does not independently test, evaluate, or verify the accuracy or completeness of any information or the soundness of any judgments contained in its standards and guideline publications.NEMA disclaims liability for any personal injury
9、, property, or other damages of any nature whatsoever, whether special, indirect, consequential, or compensatory, directly or indirectly resulting from the publication, use of, application, or reliance on this document. NEMA disclaims and makes no guaranty or warranty, express or implied, as to the
10、accuracy or completeness of any information published herein, and disclaims and makes no warranty that the information in this document will fulfill any of your particular purposes or needs. NEMA does not undertake to guarantee the performance of any individual manufacturer or sellers products or se
11、rvices by virtue of this standard or guide.In publishing and making this document available, NEMA is not undertaking to render professional or other services for or on behalf of any person or entity, nor is NEMA undertaking to perform any duty owed by any person or entity to someone else. Anyone usi
12、ng this document should rely on his or her own independent judgment or, as appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in any given circumstances. Information and other standards on the topic covered by this publication may be available fro
13、m other sources, which the user may wish to consult for additional views or information not covered by this publication.NEMA has no power, nor does it undertake to police or enforce compliance with the contents of this document. NEMA does not certify, test, or inspect products, designs, or installat
14、ions for safety or health purposes. Any certification or other statement of compliance with any health or safety-related information in this document shall not be attributable to NEMA and is solely the responsibility of the certifier or maker of the statement.Copyright National Electrical Manufactur
15、ers Association Provided by IHS under license with NEMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-C12 -6-87 4805702 OUZZbh ci Foreword (This Foreword is not a part of ANSI C12.6-1987, American National Standard for Marking and Arrangement of Terminals for Phas
16、e-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 this standard will be w
17、elcomed. 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: FA Marta, Chairman F. Huber, Jr, Secretary A.G. Aschenbeck F.W. Bagley W.C. Busch J.T
18、. Donahue M.F. Faser J. Foster C.R. Green C.F. Hawkes W.R. Keyes C. Ivan J.H. Keeler C.R. Mudnerback S.D. Murphy T.G. Willis J. Young At the time this standard was processed and approved, the American National Standards Committee C12 had the following members: R.S. Turgel, Chairman F. Huber, Jr, Sec
19、retary 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 Association T.C. Drew L. Stnichtemeyer J.H. Keeler, Jr R.M. Walden (Alt) F.A. Marta R.H. Ste
20、vens (Alt) J.C. Reich (Alt) H.L. Friend J.A. Gauthier (Alt) W. J. Zisa (Alt) D.B. Berry D. Dassman C.R. Jones R.M. Reesey D. E. Soffrin (Alt) Public Service Commissions C.J. Sk G.F. Walsh Rural Electrification P.F.B. Jackson American Public Power Association . C.R. Gomez H. Carey Jones Underwriters
21、Laboratories, Inc . W. Menuz J.W. Hogg (Alt) Electric Light and Power Group .W.C. Busch Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Contents SECTION PAGE 1 . Scope .
22、5 2 . TerminalMarking . 5 2.1 Devices for Specific Types of Services 5 2.2 UniversalDevices . 5 3 . TerminalArrangements 5 4 . Character ofTermina1 Markings . 5 5 . Number ofTerminals 5 6 . Diagrams of Internal Connections 5 FIGURES Fig 1 Standardized Terminal Markings for Phase-Shifting Devices Des
23、igned for Application on Specific Typesofservices . 6 Application of a Universal Phase-Shifting Device on Common Types of Services 7 Standardized Terminal Arrangements for Phase-Shifting Devices 8 Fig 2 Fig 3 Copyright National Electrical Manufacturers Association Provided by IHS under license with
24、NEMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-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 provide the proper lagged v
25、oltages 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 conditions of Fig. 1 fo
26、r 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 to O shall provide the voltage of proper magnitude and phasor relati
27、onship with respect to supply voltage 1 to 2 or 1 to O. (b) Terminals marked to 8 shall provide the proper voltage with respect to 3 to 2 or 2 to O. (c) Terminals marked to 8 shall provide the proper voltage with respect to 3 to O. (d) Where one voltage element is to be omitted in metering a 4-wire
28、service, terminals marked to O and to 8 shall stili provide the proper remaining two voltages, with the voltages, with the voltages Q to 63 and 43 to 8 considered eliminated. 2.2 Universal Devices. Phase-shifting devices designed for use on a variety of circuits shall be so connected internally that
29、 the external marked terninals will satisfy the conditions shown under the 3-phase, 3-wire type of sevice 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 not conform to those indica
30、ted for these other types of services. 3. Terminal Arrangements External terminal of phase-shifting devices shali 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 baseboard with a built-in test s
31、witch, the terminals may be arranged as shown in Fig. 3(b). 4. Character of Terminal Markings The identification numerals shaU 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 terminals that they unimista
32、kably identify the proper terminals. In case of phase-shifting devices with multiple lagged-voltage or output terminais for use at fixed power-factor ranges in kVA measurement, each corresponding output terminal need not be marked separately with duplicate numerals: but corresponding terminals may b
33、e 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 of Fig. 1 for line connecti
34、ons 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 the standard system of term
35、inal 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 in a legible and durable m
36、anner on the inside or outside of the covers. 5 Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSI C12.G-1987 “- al 0 .- U- O W Q I- o o t t 6 0 O 6 P r I- .- L U- o o
37、t t (U (U t t m - III (Um - o 3 .- 9 3 m al m I m O c P I ir) O001 O0 v1 I -(UnIf -m III om - o (U c P I m c O ttqi P t t c O tttg O t t e c n m I- cunf - m (U O III om - o 7 Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMANot for ResaleNo reproduction
38、or networking permitted without license from IHS-,-,-CL2 6-87 14805702 0024267 0 r ANSI Cl 2.6-1987 FOR 3-PHASE 3-WIRE SERVICES FOR 3- PHASE 4-WIRE SERVICES (a) With or Without Built-In Test Switch 1 I mmmm O mmmm omohom d I I FOR 3- PHASE 3- WIRE SERVICES FOR 3-PHASE 4- WIRE SERVICES (b) With Built-In Test Switch (Alternative Arrangement) Fig. 3 Standardized Terminal Arrangements for Phase-Shifting Devices 8 Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
