1、IEEE Std C57.13.6-2005IEEE Standard for High-AccuracyInstrument TransformersI E E E3 Park Avenue New York, NY 10016-5997, USA9 December 2005IEEE Power Engineering SocietySponsored by theTransformers CommitteeIEEE Std C57.13.6-2005IEEE Standard for High-Accuracy Instrument TransformersSponsorTransfor
2、mers Committeeof theIEEE Power Engineering SocietyApproved 29 December 2005American National Standards InstituteApproved 22 September 2005IEEE-SA Standards BoardThe Institute of Electrical and Electronics Engineers, Inc.3 Park Avenue, New York, NY 10016-5997, USACopyright 2005 by the Institute of El
3、ectrical and Electronics Engineers, Inc.All rights reserved. Published 9 December 2005. Printed in the United States of America.IEEE is a registered trademark in the U.S. Patent +1 978 750 8400. Permission to photocopy portions of any individual standard for educationalclassroom use can also be obta
4、ined through the Copyright Clearance Center.NOTEAttention is called to the possibility that implementation of this standard may require use of subjectmatter covered by patent rights. By publication of this standard, no position is taken with respect to theexistence or validity of any patent rights i
5、n connection therewith. The IEEE shall not be responsible foridentifying patents for which a license may be required by an IEEE standard or for conducting inquiries into thelegal validity or scope of those patents that are brought to its attention.ivCopyright 2005 IEEE. All rights reserved.Introduct
6、ionThis standard defines two new accuracy classes and burdens for current transformers, and one new accuracyclass for voltage transformers. These new definitions supplement those defined in IEEE Std 57.13a.Widespread use of electronic meters and relays necessitates new current transformer test burde
7、n definitionsbecause they present lower impedance than traditional induction devices. This can result in applicationswhere the total circuit burden on the current transformer is less than the lowest IEEE Std C57.13 definitionof B0.1 (2.5 VA at 5 A, 0.9 power factor). Under these conditions, a curren
8、t transformer meeting a givenaccuracy class at B0.1 is not assured. The new accuracy classes more closely complement the capabilities of electronic meters in both accuracyand dynamic range.Notice to usersErrataErrata, if any, for this and all other standards can be accessed at the following URL: htt
9、p:/standards.ieee.org/reading/ieee/updates/errata/index.html. Users are encouraged to check this URL forerrata periodically.InterpretationsCurrent interpretations can be accessed at the following URL: http:/standards.ieee.org/reading/ieee/interp/index.html.PatentsAttention is called to the possibili
10、ty that implementation of this standard may require use of subject mattercovered by patent rights. By publication of this standard, no position is taken with respect to the existence orvalidity of any patent rights in connection therewith. The IEEE shall not be responsible for identifying patentsor
11、patent applications for which a license may be required to implement an IEEE standard or for conductinginquiries into the legal validity or scope of those patents that are brought to its attention.aInformation on references can be found in Clause 2.This introduction is not part of IEEE Std C57.13.6-
12、2005, IEEE Standard for High-Accuracy InstrumentTransformers.vCopyright 2005 IEEE. All rights reserved.ParticipantsAt the time this standard was completed, the Working Group on Instrument Transformers for Use withElectronic Meters and Relays had the following membership:Christopher W. Ten Haagen, Ch
13、airThe following members of the individual balloting committee voted on this guide. Balloters may have votedfor approval, disapproval, or abstention. Anthony JonnattiVladimir KhalinRoss McTaggartPaul MillwardTom NelsonJames Smith Michael AfflerbachWallace BinderThomas BlairCarl BushStephen P. Conrad
14、Tommy CooperJerry CorkranLuis CoronadoStephen DareR. DaubertMatthew DavisRandall DotsonPaul DrumDonald DunnAmir El-SheikhGary EngmannMehrdad EskandaryJorge Fernandez-DaherMarcel FortinTrilok GargRandall GrovesRobert GrunertErik GuillotBal GuptaMichael HaasN. Kent HaggertyThomas HarbaughRobert Hartgr
15、oveAjit HiranandaniEdward Horgan, Jr.James D. Huddleston IIIAnthony JonnattiLars-Erik JuhlinGael R. KennedyVladimir KhalinYuri KhersonskyRoger LawrenceBoyd LeuenbergerR. W. LongDonald LoweJoseph MaDon MacMillanAl MaguireWilliam MajeskiJohn MatthewsNigel McQuinRoss McTaggartG. MichelDaleep MohlaRando
16、lph MullikinJerry MurphyKrste NajdenkoskiJeffrey NelsonTom NelsonArt NeubauerT. W. OlsenCarlos PeixotoDhiru PatelWesley PattersonPaulette PayneHoward PenrosePaul PillitteriDonald PlattsAlvaro PortilloJeffrey RayJohannes RickmannPierre RiffonJames RuggieriDevki SharmaChris ShultzH. Jin SimDaniel Slom
17、ovitzJames SmithAllan St. PeterChand TailorChristopher W. Ten HaagenShanmugan ThamilarasanAlan TrautJohn VandermaarGerald VaughnS. Frank WatererJoe WatsonviCopyright 2005 IEEE. All rights reserved.When the IEEE-SA Standards Board approved this guide on 22 September 2005, it had the followingmembersh
18、ip:Steve M. Mills, ChairRichard H. Hulett, Vice ChairJudith Gorman, Secretary*Member EmeritusAlso included are the following nonvoting IEEE-SA Standards Board liaisons:Satish K. Aggarwal, NRC RepresentativeRichard DeBlasio, DOE RepresentativeAlan H. Cookson, NIST RepresentativeJennie SteinhagenIEEE
19、Standards Project EditorMark D. BowmanDennis B. BrophyJoseph BruderRichard CoxBob DavisJulian Forster*Joanna N. GueninMark S. HalpinRaymond HapemanWilliam B. HopfLowell G. JohnsonHerman KochJoseph L. Koepfinger*David J. LawDaleep C. MohlaPaul NikolichT. W. OlsenGlenn ParsonsRonald C. PetersenGary S.
20、 RobinsonFrank StoneMalcolm V. ThadenRichard L. TownsendJoe D. WatsonHoward L. WolfmanContents 1. Scope 1 2. Normative references 1 3. Definitions 2 4. Basis for 0.15 and 0.15S accuracy classes for metering. 2 5. Basis for standard burdens for use with electronic meters and relays 5 6. Nameplates .
21、5 6.1 Current transformer . 5 6.2 Voltage transformer. 5 7. Routine accuracy tests 5 7.1 Current transformers 5 7.2 Voltage transformers . 6 vii Copyright 2005 IEEE. All rights reserved. IEEE Standard for High-Accuracy Instrument Transformers 1. a) b) 2. Scope This standard defines one new 0.15 accu
22、racy class for voltage transformers, two new 0.15 accuracy classes for current transformers, two new current transformer burdens, and two new current transformer routine accuracy test methods. These supplement IEEE Std C57.131. The new burdens shall be considered for use when current transformers ar
23、e to be used with electronic meters, and the total in-circuit burden will be less than B-0.1 (2.5 VA at 5 A, 0.9 power factor) defined in IEEE Std C57.13. The new accuracy classes, 0.15 and 0.15S, are available to complement the capabilities of solid state electricity metering of equipment associate
24、d with the generation, transmission, and distribution of alternating current. There are two important differences about these new accuracy class definitions as they apply to routine current transformer test requirements: A low current test is required at 5% of rated current (0.25 A secondary), in li
25、eu of the 10% of rated current test specified in IEEE Std C57.13. This test point corresponds with the light load test point of transformer rated electromechanical and solid state electricity meters as specified in ANSI C12.20. Routine testing for current transformers certified to meet 0.15 or 0.15S
26、 accuracy must include accuracy reading(s) using new burden definition E-0.04. The intent of burden E-0.04 (1.0 VA at 5 A, unity power factor) is to approximate the lowest secondary circuit burden that can occur in practical applications. Testing a current transformer at this burden is analogous to
27、the routine no-load voltage transformer test required by IEEE Std C57.13. Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced
28、 document (including any amendments or corrigenda) applies. 1Information on references can be found in Clause 2. 1 Copyright 2005 IEEE. All rights reserved. IEEE C57.13.6-2005 IEEE Standard for High-Accuracy Instrument Transformers ANSI C12.10, American National Standard Physical Aspects of Watthour
29、 MetersSafety Standards.2ANSI C12.20, American National Standard Electricity Meters 0.2 and 0.5 Accuracy Classes. IEEE Std C57.13, IEEE Standard Requirements for Instrument Transformers.3,43.4. a) b) Definitions All definitions shall be in accordance with IEEE 100, The Authoritative Dictionary of IE
30、EE Standards Terms, and IEEE Std C57.13. Basis for 0.15 and 0.15S accuracy classes for metering The 0.15 and 0.15S accuracy classes are based on the requirement that the transformer correction factor (TCF) of the voltage or current transformer shall be within the specified limits of Table 1 when the
31、 power factor of the metered load has any value from 0.6 lagging to unity, under the following specified conditions: For current transformers, burden E-0.04, and each additional specified standard burden, at 5% and at 100% of rated primary current, and at the current corresponding to the continuous
32、thermal rating factor (RF), if it is greater than 1.0. The accuracy class at a lower standard burden is not necessarily the same as at the specified standard burden. For voltage transformers, from 0 VA through the specified standard burden, and from 90% to 110% of the rated voltage. The accuracy cla
33、ss at a lower standard burden of different power factor is not necessarily the same as at the specified standard burden. 2ANSI publications are available from the Sales Department, American National Standards Institute, 25 West 43rd Street, 4th Floor, New York, NY 10036, USA (http:/www.ansi.org/). 3
34、The IEEE standards or products referred to in this clause are trademarks of the Institute of Electrical and Electronics Engineers, Inc. 4IEEE publications are available from the Institute of Electrical and Electronics Engineers, Inc., 445 Hoes Lane, Piscataway, NJ 08854, USA (http:/standards.ieee.or
35、g/). 2 Copyright 2005 IEEE. All rights reserved. IEEE C57.13.6-2005 IEEE Standard for High-Accuracy Instrument Transformers Table 1 Standard for high accuracy class metering service, with corresponding limits of transformer correction factor 0.6 to 1.0 power factor (lagging) of metered load Voltage
36、transformers (from 90% to 110% rated voltage) Current transformers Metering accuracy class Minimum Maximum At 100% rated currentaMinimum Maximum At 5% rated current Minimum Maximum 0.15 0.9985 1.0015 0.9985 1.0015 0.9970 1.0030 0.15S N/A N/A 0.9985 1.0015 0.9985 1.0015 NOTEThese relations are shown
37、graphically in Figure 1 and Figure 2 for current transformers and in Figure 3 for voltage transformers.5aFor current transformers, the 100 % rated current limit also applies to the current corresponding to the continuous thermal current rating factor, if it is greater than 1.0. NOTEThe transformer c
38、haracteristics shall lie within the stated limits of the parallelogram at 5% and 100% of rated current. For current transformers, the 100% rated current limit also applies to the current corresponding to the continuous thermal current rating factor, if it is greater than 1.0. Figure 1Limits for 0.15
39、 accuracy class for current transformers for metering 5Notes in text, tables, and figures are given for information only, and do not contain requirements needed to implement the standard. 3 Copyright 2005 IEEE. All rights reserved. IEEE C57.13.6-2005 IEEE Standard for High-Accuracy Instrument Transf
40、ormers NOTEThe transformer characteristics shall lie within the stated limits of the parallelogram from 5% through 100% of rated current. For current transformers, the 100% rated current limit also applies to the current corresponding to the continuous thermal current rating factor, if it is greater
41、 than 1.0. Figure 2 Limits for 0.15S accuracy class for current transformers for metering NOTEThe transformer characteristics shall lie within the limits of the parallelogram for all voltages between 90% to 100% of rated voltage. Figure 3 Limits of 0.15 accuracy class for voltage transformers for me
42、tering 4 Copyright 2005 IEEE. All rights reserved. IEEE C57.13.6-2005 IEEE Standard for High-Accuracy Instrument Transformers 5.Table 2Basis for standard burdens for use with electronic meters and relays Electronic meters, relays, and connecting circuits may present a lower burden or lower burden ph
43、ase angle to the secondary of the current transformer than standard burdens defined in IEEE Std C57.13. An instrument transformer meeting a given accuracy class at burden B0.1 may not meet the same accuracy class when the application calls for a burden power factor between 0.9 and unity, and or less
44、 than 2.5 VA (at 5 A). Two standard E burdens for current transformers with 5 A rated secondary are defined in Table 2. These may be used with, or in addition to, burdens and accuracy classes defined in IEEE Std C57.13. Standard burdens for current transformers with 5 A secondary windingsaBurden typ
45、e Burden designationbResistance () Inductance (mH) Impedance () Total Power (VA) at 5 A Power factor E-0.2 0.20 0.0 0.20 5.0 1.0 Electronic Metering Burdens E-0.04 0.04 0.0 0.04 1.0 1.0 aIf a current transformer secondary winding is rated at other than 5 A, ohmic burdens for a specification and rati
46、ng shall be derived by multiplying the resistance and inductance values provided in Table 2 by the factor: 5 A/(current rating in amperes)2. The burden designation, total power, and the power factor remain unchanged. bThese standard burden designations have no significance at frequencies other than
47、60 Hz. 6. 6.16.27.7.1Nameplates Accuracy rating on the nameplate of a current transformer or voltage transformer shall include, as a minimum, the following (see 6.1 and 6.2): Current transformer The standard burdens at which the transformer is rated 0.15 or 0.15S accuracy class. Voltage transformer
48、The standard burdens at which the transformer is rated 0.15 accuracy class. Routine accuracy tests Current transformers Accuracy tests for current transformers with 0.15 or 0.15S metering accuracy ratings shall be made on each transformer when energized at rated frequency. Two or four test points de
49、fined in Table 3 may be required. 5 Copyright 2005 IEEE. All rights reserved. IEEE C57.13.6-2005 IEEE Standard for High-Accuracy Instrument Transformers Table 3 0.15 and 0.15S accuracy test points Test PointaRated Current Test Burden 1 100% E-0.042 5% Maximum rated burden3 100% Maximum rated burden 4 5% E-0.04a No significance to test sequence. Test points 1, 2, 3, and 4 in Table 3 are generally required for 0.15 and 0.15S accuracy class transformers. Ratio and phase angle readings must meet the limits specified i
