1、IEEE Std C57.12.51-2008(Revision ofIEEE Std C57.12.51-1981)IEEE Standard for Ventilated Dry-Type Power Transformers, 501 kVAand Larger, Three-Phase, with High-Voltage 601 V to 34 500 V; Low-Voltage 208Y/120 V to 4160 VGeneral RequirementsIEEE3 Park Avenue New York, NY 10016-5997, USA9 March 2009IEEE
2、 Power Low- Voltage 208Y/120 V to 4160 V General Requirements Sponsor IEEE Transformers Committee of the IEEE Power +1 978 750 8400. Permission to photocopy portions of any individual standard for educational classroom use can also be obtained through the Copyright Clearance Center.Introduction This
3、 introduction is not part of IEEE Std C57.12.51-2008, IEEE Standard for Ventilated Dry-Type Power Transformers, 501 kVA and Larger, Three-Phase, with High-Voltage 601 V to 34 500 V; Low-Voltage 208Y/120 V to 4160 VGeneral Requirements. This dry-type transformer standard describes ventilated dry-type
4、 transformers with self-cooled kilovolt-ampere ratings 501 V to 7500 V and high voltages 601 V to 34 500 V; forced-air-cooled ratings for certain sizes are listed in Clause 9. This standard is the result of an effort encompassing the interests of users, manufactures, and others dedicated to developi
5、ng voluntary consensus standards primarily for dry-type transformers. Table 2, Table 3, Table 9, Table 11, and Table 12 of this standard have been revised to coordinate with IEEE Std C57.12.01.aTable 4 has been revised to reflect industry practice. The copyright of this standard has been transferred
6、 from NEMA to IEEE. This standard is a voluntary consensus standard. Its use is mandatory only when required by a duly constituted legal authority or when specified in a contractual relationship. To meet specialized needs and to allow innovation, specific changes are permissible when mutually determ
7、ined by the user and the producer, provided such changes do not violate existing laws and are considered technically adequate for the function intended. Notice to users Laws and regulations Users of these documents should consult all applicable laws and regulations. Compliance with the provisions of
8、 this standard does not imply compliance to any applicable regulatory requirements. Implementers of the standard are responsible for observing or referring to the applicable regulatory requirements. IEEE does not, by the publication of its standards, intend to urge action that is not in compliance w
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11、e that these documents may be superseded at any time by the issuance of new editions or may be amended from time to time through the issuance of amendments, corrigenda, or errata. An official IEEE document at any point in time consists of the current edition of the document together with any amendme
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13、, or contact the IEEE at the address listed previously. aFor information on references, see Clause 2. iv Copyright 2009 IEEE. All rights reserved. For more information about the IEEE Standards Association or the IEEE standards development process, visit the IEEE-SA website at http:/standards.ieee.or
14、g. Errata Errata, if any, for this and all other standards can be accessed at the following URL: http:/standards.ieee.org/reading/ieee/updates/errata/inde .htmlx . Users are encouraged to check this URL for errata periodically. Interpretations Current interpretations can be accessed at the following
15、 URL: http:/standards.ieee.org/reading/ieee/interp/ inde .htmlx . Patents Attention is called to the possibility that implementation of this standard may require use of subject matter covered by patent rights. By publication of this standard, no position is taken with respect to the existence or val
16、idity of any patent rights in connection therewith. A patent holder or patent applicant has filed a statement of assurance that it will grant licenses under these rights without compensation or under reasonable rates, with reasonable terms and conditions that are demonstrably free of any unfair disc
17、rimination to applicants desiring to obtain such licenses. Other Essential Patent Claims may exist for which a statement of assurance has not been received. The IEEE is not responsible for identifying Essential Patent Claims for which a license may be required, for conducting inquiries into the lega
18、l validity or scope of Patents Claims, or determining whether any licensing terms or conditions are reasonable or non-discriminatory. Further information may be obtained from the IEEE Standards Association. v Copyright 2009 IEEE. All rights reserved. Participants At the time this standard was submit
19、ted to the IEEE-SA Standards Board for approval, the Ventilated Dry-Type Power Transformers Working Group had the following membership: Paulette Payne Powell, Chair Derek Foster Charles Johnson Richard Marek Sheldon Kennedy The following members of the balloting committee voted on this standard. Bal
20、loters may have voted for approval, disapproval, or abstention. William J. Ackerman I. Antweiler Stan Arnot David Barnard Wallace Binder Thomas Bishop Thomas Blair William Bloethe Steven Brockschink Carl Bush Tommy Cooper Jerry Corkran Dieter Dohnal Donald Dunn Gary Engmann Joseph Foldi Paul Forquer
21、 Marcel Fortin Jalal Gohari Randall Groves Michael Haas Norman Haggerty Kenneth Hanus Gary Heuston John Houdek James Huddleston Charles Johnson James Jones Sheldon Kennedy J. Koepfinger Jim Kulchisky Saumen Kundu John Lackey Chung-Yiu Lam Stephen Lambert Keith N. Malmedal Richard Marek John W. Matth
22、ews Gary Michel Daniel Mulkey Jerry Murphy Michael S. Newman Alvaro Portillo Paulette Payne Powell Iulian Profir Kirk Robbins Michael Roberts Dinesh Pranathy Sankarakurup Bartien Sayogo Hyeong Sim Tarkeshwar Singh James E. Smith Jerry Smith S. Thamilarasan T. Traub John Vergis Kenneth White James Wi
23、lson William Wimmer Kipp Yule Matthew Zeedyk Ahmed Zobaa When the IEEE-SA Standards Board approved this standard on 26 September 2008, it had the following membership: Robert M. Grow, Chair Tom A. Prevost, Vice Chair Steve M. Mills, Past Chair Judith Gorman, Secretary Victor Berman Richard DeBlasio
24、Andrew Drozd Mark Epstein Alexander Gelman William R. Goldbach Arnold M. Greenspan Kenneth S. Hanus James Hughes Richard H. Hulett Young Kyun Kim Joseph L. Koepfinger* John Kulick David J. Law Glenn Parsons Ronald C. Petersen Chuck Powers Narayanan Ramachandran Jon Walter Rosdahl Anne-Marie Sahazizi
25、an Malcolm V. Thaden Howard L. Wolfman Don Wright*Member Emeritus Also included are the following nonvoting IEEE-SA Standards Board liaisons: Satish K. Aggarwal, NRC Representative Michael Janezic, NIST Representative Lorraine Patsco IEEE Standards Program Manager, Document Development Matthew J. Ce
26、glia IEEE Standards Program Manager, Technical Program Development vi Copyright 2009 IEEE. All rights reserved. Contents 1. Overview 1 1.1 Scope . 1 1.2 Purpose 1 2. Normative references 2 3. Definitions 2 4. Usual service conditions. 2 5. Ratings and characteristics . 2 5.1 Kilovolt-ampere ratings.
27、 2 5.2 Kilovolt-ampere and voltage ratings 3 5.3 Taps . 3 5.4 Insulation levels. 3 5.5 Angular displacement and terminal markings . 4 5.6 Percent impedance voltage 5 6. Construction . 5 6.1 Insulation system . 5 6.2 Accessory location. 5 6.3 Nameplate 6 6.4 Transformer connections . 6 6.5 Tap changi
28、ng . 7 6.6 Lifting, jacking, and moving facilities. 7 6.7 Ground pad 8 6.8 Transformer enclosure. 9 7. Routine tests . 10 8. Tolerances 10 9. Other ratings and characteristics. 10 9.1 Forced-air-cooled ratings. 10 9.2 40 C average ambient temperature conditions . 11 9.3 Other winding temperature ris
29、es 11 9.4 Other temperature class insulation systems . 11 9.5 Other high-voltage ratings and connections 12 9.6 YY connected transformers . 13 9.7 Increased neutral insulation . 15 9.8 Other basic lightning impulse insulation levels . 15 vii Copyright 2009 IEEE. All rights reserved. 10. Other constr
30、uction 16 10.1 High-voltage connection arrangements . 16 10.2 Low-voltage connection arrangements 16 10.3 Surge arresters . 16 10.4 Unit substation application 17 10.5 Temperature devices 17 10.6 Forced-air cooling 17 10.7 Provision for future forced-air cooling 17 10.8 Space heaters . 18 10.9 Curre
31、nt transformers (or provision for their addition in the future). 18 10.10 Terminal blocks . 18 10.11 Contacts . 18 11. Other tests. 18 Annex A (informative) Bibliography . 19 viii Copyright 2009 IEEE. All rights reserved. IEEE Standard for Ventilated Dry- Type Power Transformers, 501 kVA and Larger,
32、 Three-Phase, with High- Voltage 601 V to 34 500 V; Low- Voltage 208Y/120 V to 4160 V General Requirements IMPORTANT NOTICE: This standard is not intended to ensure safety, security, health, or environmental protection in all circumstances. Implementers of the standard are responsible for determinin
33、g appropriate safety, security, environmental, and health practices or regulatory requirements. This IEEE document is made available for use subject to important notices and legal disclaimers. These notices and disclaimers appear in all publications containing this document and may be found under th
34、e heading “Important Notice” or “Important Notices and Disclaimers Concerning IEEE Documents.” They can also be obtained on request from IEEE or viewed at http:/standards.ieee.org/IPR/disclaimers.html. 1. 1.11.2Overview Scope This standard is intended to set forth characteristics relating to perform
35、ance, limited electrical and mechanical interchangeability, as well as safety of the equipment described, and to assist in the proper selection of such equipment. Specific rating combinations are described in the range from 750/1000 kVA to 7500/10 000 kVA inclusive, with high-voltage 601 V to 34 500
36、 V inclusive and low-voltage 208Y/120 V to 4160 V inclusive. This standard does not apply to other types of transformers such as specialty, ventilated dry-type 500 kVA and smaller, sealed dry-type, pad-mounted dry-type, liquid immersed, instrument, regulating, furnace, mine, and rectifier transforme
37、rs. Transformers with high voltage 600 V or less are excluded. Purpose This standard describes certain electrical and mechanical characteristics and takes into consideration certain safety features of 60 Hz, two-winding, three-phase, ventilated dry-type transformers with self-cooled ratings 501 kVA
38、and larger, which are generally used for step-down purposes. Forced-air-cooled ratings for certain sizes are listed in Clause 9. 1 Copyright 2009 IEEE. All rights reserved. IEEE Std C57.12.51-2008 IEEE Standard for Ventilated Dry-Type Power Transformers, 501 kVA and Larger, Three-Phase, with High-Vo
39、ltage 601 V to 34 500 V; Low-Voltage 208Y/120 V to 4160 VGeneral Requirements 2. 3.4.5.5.1Normative references The following referenced documents are indispensable for the application of this document (i.e., they must be understood and used, so that each referenced document is cited in text and its
40、relationship to this document is explained). For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments or corrigenda) applies. IEEE Std C57.12.01TM, IEEE Standard General Requirements for Dry-Type Distributio
41、n and Power Transformers, Including Those with Solid-Cast and/or Resin Encapsulated Windings.1,2IEEE Std C57.12.70TM, IEEE Standard Terminal Markings and Connections for Distribution and Power Transformers. IEEE Std C57.13TM, IEEE Standard Requirements for Instrument Transformers. Definitions For th
42、e purposes of this standard, the following terms and definitions apply. Transformer terminology as set forth in IEEE Std C57.12.80TMB63shall apply. The Authoritative Dictionary of IEEE Standards, Seventh Edition B5 should be referenced for other terms not defined. Usual service conditions Service co
43、nditions shall be in accordance with those described in IEEE Std C57.12.01TM. Ratings and characteristics Kilovolt-ampere ratings Kilovolt-ampere ratings are continuous and based on not exceeding a 150C average winding temperature rise, as measured by resistance with a 220 C temperature class insula
44、tion system (220 C limiting temperature) as defined in IEEE Std C57.12.01. The preferred self-cooled (AN) kilovolt-ampere ratings are 750, 1000, 1500, 2000, 2500, 3750, 5000, and 7500 kVA. 1The IEEE standards or products referred to in this clause are trademarks of the Institute of Electrical and El
45、ectronics Engineers, Inc. 2IEEE publications are available from the Institute of Electrical and Electronics Engineers, 445 Hoes Lane, Piscataway, NJ 08854, USA (http:/standards/ieee.org/). 3The numbers in brackets correspond to those of the bibliography in Annex A. 2 Copyright 2009 IEEE. All rights
46、reserved. IEEE Std C57.12.51-2008 IEEE Standard for Ventilated Dry-Type Power Transformers, 501 kVA and Larger, Three-Phase, with High-Voltage 601 V to 34 500 V; Low-Voltage 208Y/120 V to 4160 VGeneral Requirements 5.2Table 1Kilovolt-ampere and voltage ratings The preferred kilovolt-ampere and volta
47、ge ratings for three-phase self-cooled (AN) transformers are shown in Table 1. Range of kilovolt-ampere and voltage ratings for three-phase (AN) transformers Kilovolt-ampere ratings (kVA) Rated high voltage (V) Low voltage 208Y/120 Low voltages 480, 480Y/277 Low voltages 2400, 4160grdY/2400, 4160 24
48、00 7501000 7501500 4160 7501000 7501500 4800 7501000 7501500 6900 7501000 7502500 7200 7501000 7502500 12 000 7501000 7502500 7507500 12 470 7501000 7502500 7507500 13 200 7501000 7502500 7507500 13 800 7501000 7502500 7507500 23 000 7501000 10002500 15007500 34 500 7501000 10002500 15007500 NOTE 1A
49、ll voltages are unless otherwise indicated. NOTE 2Kilovolt-ampere ratings separated by a dash indicate that all the intervening ratings listed in 5.1 are included. 5.35.4Taps Four high-voltage winding rated kilovolt-ampere taps shall be provided as follows: two 2.5% taps above rated voltage, and two 2.5% taps below rated voltage. Insulation levels High-voltage line terminal insulation levels shall be in accordance with IEEE Std C57.12.01; Table 2 and Table 3 summarize the preferred insulation levels from this document.
