1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationPower transformers Part 21: Standard requirements, terminology, and test code for step-voltage regulatorsBS IEC 60076-21:2011National forewordThis British Standard is the UK impl
2、ementation of IEC 60076-21:2011.The UK participation in its preparation was entrusted to Technical CommitteePEL/14, Power transformers.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary prov
3、isions of a contract. Users are responsible for its correct application. The British Standards Institution 2012Published by BSI Standards Limited 2012ISBN 978 0 580 75602 3 ICS 29.180 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published
4、 under the authority of the Standards Policy and Strategy Committee on 29 February 2012.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS IEC 60076-21:2011IEC 60076-21 Edition 1.0 2011-12 INTERNATIONAL STANDARD Power transformers Part 21: Standard requirements, termino
5、logy, and test code for step-voltage regulators INTERNATIONAL ELECTROTECHNICAL COMMISSION XD ICS 29.180 PRICE CODE ISBN 978-2-88912-848-8 IEEE Std C57.15BS IEC 60076-21:2011 i IEC 60076-21:2011(E) IEEE Std C57.15-2009 Published by the IEC under licence from IEEE. 2009 IEEE. All rights reserved. Cont
6、ents 1. Overview 1 1.1 Scope . 1 1.2 Purpose 1 1.3 Word usage 1 2. Normative references 2 3. Definitions 3 4. Service conditions 9 4.1 Usual service conditions 9 4.2 Loading at other than rated conditions .10 4.3 Unusual service conditions .10 4.4 Frequency .12 5. Rating data .12 5.1 Cooling classes
7、 of voltage regulators .12 5.2 Ratings 13 5.3 Supplementary continuous-current ratings .17 5.4 Taps 18 5.5 Operating voltage limits .18 5.6 Voltage supply ratios 20 5.7 Insulation levels 20 5.8 Losses .21 5.9 Short-circuit requirements 22 5.10 Tests 23 6. Construction 24 6.1 Bushings .24 6.2 Termina
8、l markings 25 6.3 Diagram of connections 26 6.4 Nameplates .26 6.5 Tank construction .27 6.6 Components and accessories 31 7. Other requirements 32 7.1 Other supplementary continuous-current ratings 32 7.2 Other components and accessories .32 8. Test code33 8.1 Resistance measurements .34 8.2 Polari
9、ty test .36 8.3 Ratio tests .37 8.4 No-load losses and excitation current .40 8.5 Load losses and impedance voltage 45 8.6 Dielectric tests 51 8.7 Temperature-rise tests .64 8.8 Short-circuit tests 73 8.9 Calculated data .77 9. Control systems .81 BS IEC 60076-21:2011IEC 60076-21:2011(E) ii IEEE Std
10、 C57.15-2009 Published by the IEC under licence from IEEE. 2009 IEEE. All rights reserved. 9.1 General .81 9.2 Control device construction 81 9.3 Control system requirements 82 9.4 Tests 83 Annex A (informative) Unusual temperature and altitude conditions .87 Annex B (informative) Field dielectric t
11、ests89 Annex C (informative) Bibliography.90 Annex D (informative) IEEE List of Participants .92 BS IEC 60076-21:2011 iii IEC 60076-21:2011(E) IEEE Std C57.15-2009 Published by the IEC under licence from IEEE. 2009 IEEE. All rights reserved. INTERNATIONAL ELECTROTECHNICAL COMMISSION _ POWER TRANSFOR
12、MERS Part 21: Standard requirements, terminology, and test code for step-voltage regulators FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC
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20、e elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60076-21/IEEE Std C57.15 has been processed through IEC technical committee 14: Power transformers. The text of this sta
21、ndard is based on the following documents: IEEE Std FDIS Report on voting C57.15-2009 14/688/FDIS 14/697/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. BS IEC 60076-21:2011IEC 60076-21:2011(E) iv IEEE Std C57.15
22、-2009 Published by the IEC under licence from IEEE. 2009 IEEE. All rights reserved. A list of all the parts in the IEC 60076 series, published under the general title Power transformers can be found on the IEC website. The committee has decided that the contents of this publication will remain uncha
23、nged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. BS IEC 60076-21:2011 v IEC 60076-21:2011(E) IEEE Std C57
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44、s reserved. IEEE Standard Requirements, Terminology, and Test Code for Step-Voltage Regulators Sponsor Transformers Committee of the IEEE Power include 50 Hz ratings. Ratings of 2.4 kV (45 BIL), 46 kV (250 BIL), and 69 kV (350 BIL) have been removed from the three-phase 60 Hz voltage regulator ratin
45、g Table 5 (Table 4 in 1999 edition) due to historical inactivity of requests from users for ratings. e) Add bushing terminal connectors for current ratings of 669 A to 2000 A. f) Clarify Type A and Type B designs and their resulting voltage regulation per extreme tap positions. g) Review short-circu
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