1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 60076-1:2011Incorporating corrigendum June 2012Power transformers Part 1: GeneralBS EN 60076-1:2011 BRITISH STANDARDNational forewordThis British Standard is the UK impleme
2、ntation of EN 60076-1:2011.It is identical to IEC 60079-1:2011. It supersedes BS EN 60076-1:1997,which will be withdrawn on 25 May 2014.The UK participation in its preparation was entrusted to TechnicalCommittee PEL/14, Power transformers.A list of organizations represented on this committee can be
3、obtainedon request to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application. BSI 2011 ISBN 978 0 580 79483 4 ICS 29.180 Compliance with a British Standard cannot confer immunity from legal obligations.T
4、his British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 30 November 2011.Amendments/corrigenda issued since publicationDate Text affected30 June 2012 Correction to the running headersBS EN 60076-1:2011 BRITISH STANDARDNational forewordThis British Stan
5、dard is the UK implementation of E 60076-1:2011.It is identical to IEC 60079-1:2011. It supersedes BS EN 60076-1:1997,which will be withdrawn on 25 May 2014.The UK participation in its preparation was entrusted to TechnicalCommittee PEL/14, Power transformers.A list of organizations represented on t
6、his committee can be obtainedon request to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application. BSI 2011 ISBN 978 0 580 79483 4 ICS 29.180 Compliance with a British Standard cannot confer immunity fro
7、m legal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 30 November 2011.Amendments/corrigenda issued since publicationDate Text affected31 July 2012 Correction to the running headers6- : . It s ersedes BS EN 60076-1:1997, The Brit
8、ish Standards Institution 2012. Published by BSI StandardsLimited 2012BS EN 60076-1:2011EUROPEAN STANDARD EN 60076-1 NORME EUROPENNE EUROPISCHE NORM November 2011 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr El
9、ektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60076-1:2011 E ICS 29.180 Supersedes EN 60076-1:1997 + A1:2000 + A12:2002English version Power tra
10、nsformers - Part 1: General (IEC 60076-1:2011) Transformateurs de puissance - Partie 1: Gnralits (CEI 60076-1:2011) Leistungstransformatoren - Teil 1: Allgemeines (IEC 60076-1:2011) This European Standard was approved by CENELEC on 2011-05-25. CENELEC members are bound to comply with the CEN/CENELEC
11、 Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or t
12、o any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as th
13、e official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, P
14、oland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 60076-1:2011EN 60076-1:2011 - 2 - Foreword The text of document 14/675/FDIS, future edition 2 of IEC 60076-1, prepared by IEC TC 14, Power transformers, was submitted to the IEC-CENELEC parallel vo
15、te and was approved by CENELEC as EN 60076-1 on 2011-05-25. This European Standard supersedes EN 60076-1:1997 + A1:2000 + A12:2002. EN 60076-1:2011 includes the following significant technical changes with respect to EN 60076-1:1997: addition of a definition of harmonic content; addition of a subcla
16、use on transport; addition of functional method of specification; addition of connection symbols for single phase transformers; addition of safety and environmental requirements; addition of requirements for liquid preservation systems; addition of a clause on DC currents; addition of vacuum, pressu
17、re and leak tests on tanks; the requirements formerly in Annex A are now incorporated in the text and Annex A is now an informative checklist; informative annexes have been added on facilities for condition monitoring and environmental and safety considerations. Attention is drawn to the possibility
18、 that some of the elements of this document may be the subject of patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an ident
19、ical national standard or by endorsement (dop) 2012-05-04 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2014-05-25 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60076-1:2011 was approved by CENELEC
20、 as a European Standard without any modification. EN 60076-1:2011BS EN 60076-1:2011- 3 - EN 60076-1:2011 In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60060 series NOTE Harmonized in EN 60060 series (not modified). IEC 60068-3-3 NOTE
21、 Harmonized as EN 60068-3-3. IEC 60076-4 NOTE Harmonized as EN 60076-4. IEC 60076-6 NOTE Harmonized as EN 60076-6. IEC 60076-13 NOTE Harmonized as EN 60076-13. IEC 60270 NOTE Harmonized as EN 60270. IEC 60310 NOTE Harmonized as EN 60310. IEC 60529:1989 NOTE Harmonized as EN 60529:1991 (not modified)
22、. IEC 61378 series NOTE Harmonized in EN 61378 series (not modified). IEC 61378-1 NOTE Harmonized as EN 61378-1. IEC 61378-2 NOTE Harmonized as EN 61378-2. _ BS EN 60076-1:2011EN 60076-1:2011BS EN 60076-1:2011EN 60076-1:2011 - 4 - Annex ZA (normative) Normative references to international publicatio
23、ns with their corresponding European publications 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 document (including any amendments) applies.
24、 NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60076-2 - Power transformers - Part 2: Temperature rise for liquid-immersed transformers EN 60076-2 - IEC 60076-3 2000 Power transf
25、ormers - Part 3: Insulation levels, dielectric tests and external clearances in air EN 60076-3 2001 IEC 60076-5 2006 Power transformers - Part 5: Ability to withstand short circuit EN 60076-5 2006 IEC 60076-10 2001 Power transformers - Part 10: Determination of sound levels EN 60076-10 2001 IEC 6007
26、6-11 2004 Power transformers - Part 11: Dry-type transformers EN 60076-11 2004 IEC 60137 2008 Insulated bushings for alternating voltages above 1 000 V EN 60137 2008 IEC 60214-1 2003 Tap-changers - Part 1: Performance requirements and test methods EN 60214-1 2003 IEC 60296 2003 Fluids for electrotec
27、hnical applications - Unused mineral insulating oils for transformers and switchgear EN 60296 + corr. September 2004 2004 IEC 60721-3-4 1995 Classification of environmental conditions - Part 3: Classification of groups of environmental parameters and their severities - Section 4: Stationary use at n
28、on-weatherprotected locations EN 60721-3-4 1995 ISO 9001 2008 Quality management systems - Requirements EN ISO 9001 2008 EN 60076-1:2011 2 60076-1 IEC:2011 CONTENTS FOREWORD . 5 1 Scope . 7 2 Normative references . 8 3 Terms and definitions . 8 3.1 General . 8 3.2 Terminals and neutral point . 9 3.3
29、 Windings . 10 3.4 Rating . 11 3.5 Tappings . 13 3.6 Losses and no-load current . 15 3.7 Short-circuit impedance and voltage drop 16 3.8 Temperature rise . 17 3.9 Insulation 17 3.10 Connections 17 3.11 Test classification 18 3.12 Meteorological data with respect to cooling . 19 3.13 Other definition
30、s 19 4 Service conditions 20 4.1 General . 20 4.2 Normal service conditions . 20 5 Rating and general requirements 22 5.1 Rated power 22 5.1.1 General . 22 5.1.2 Preferred values of rated power . 22 5.1.3 Minimum power under alternative cooling modes . 22 5.1.4 Loading beyond rated power 23 5.2 Cool
31、ing mode 23 5.3 Load rejection on transformers directly connected to a generator 23 5.4 Rated voltage and rated frequency 23 5.4.1 Rated voltage 23 5.4.2 Rated frequency 23 5.4.3 Operation at higher than rated voltage and/or at other than rated frequency 24 5.5 Provision for unusual service conditio
32、ns 24 5.6 Highest voltage for equipment Umand dielectric tests levels . 25 5.7 Additional information required for enquiry 25 5.7.1 Transformer classification 25 5.7.2 Winding connection and number of phases 25 5.7.3 Sound level . 26 5.7.4 Transport . 26 5.8 Components and materials 26 6 Requirement
33、s for transformers having a tapped winding . 27 6.1 General Notation of tapping range 27 6.2 Tapping voltage tapping current. Standard categories of tapping voltage variation. Maximum voltage tapping. 27 6.3 Tapping power. Full-power tappings reduced-power tappings . 30 BS EN 60079-1:2011BS EN 60076
34、-1:201160076-1 IEC:201160076-1 IEC:2011 3 6.4 Specification of tappings in enquiry and order . 31 6.4.1 General . 31 6.4.2 Constructional specification . 31 6.4.3 Functional specification . 32 6.5 Specification of short-circuit impedance 32 6.6 Load loss and temperature rise . 33 7 Connection phase
35、displacement symbols . 34 7.1 Connection and phase displacement symbols for three-phase transformers and for single phase transformers connected in a three phase bank 34 7.1.1 Connection symbol 34 7.1.2 Phase displacement in clock number notation 34 7.1.3 Windings not intended to be loaded . 35 7.1.
36、4 Reconnectable windings 35 7.1.5 Examples 35 7.2 Connection and phase displacement symbols for single phase transformers not in three phase bank . 37 7.2.1 Connection symbol 37 7.2.2 Phase displacement in clock number notation 38 7.2.3 Windings not intended to be loaded . 38 7.2.4 Reconnectable win
37、dings 38 8 Rating plates 39 8.1 General . 39 8.2 Information to be given in all cases . 39 8.3 Additional information to be given when applicable 40 9 Safety, environmental and other requirements 41 9.1 Safety and environmental requirements . 41 9.1.1 Liquid leaks . 41 9.1.2 Safety considerations 41
38、 9.2 Dimensioning of neutral connection . 42 9.3 Liquid preservation system 42 9.4 DC currents in neutral circuits . 43 9.5 Centre of gravity marking 43 10 Tolerances . 43 11 Tests 44 11.1 General requirements for routine, type and special tests . 44 11.1.1 General . 44 11.1.2 Routine tests . 46 11.
39、1.3 Type tests . 46 11.1.4 Special tests 47 11.2 Measurement of winding resistance . 47 11.2.1 General . 47 11.2.2 Dry-type transformers 47 11.2.3 Liquid-immersed type transformers 48 11.3 Measurement of voltage ratio and check of phase displacement 48 11.4 Measurement of short-circuit impedance and
40、 load loss 48 11.5 Measurement of no-load loss and current 49 11.6 Measurement of zero-sequence impedance(s) on three-phase transformers 50 11.7 Tests on on-load tap-changers Operation test 51 BS EN 60079-1:2011BS EN 60076-1:201160076-1 IEC:2011 4 60076-1 IEC:2011 11.8 Leak testing with pressure for
41、 liquid immersed transformers (tightness test) 51 11.9 Vacuum deflection test for liquid immersed transformers . 51 11.10 Pressure deflection test for liquid immersed transformers 52 11.11 Vacuum tightness test on site for liquid immersed transformers . 53 11.12 Check of core and frame insulation .
42、53 12 Electromagnetic compatibility (EMC) 53 13 High frequency switching transients 54 Annex A (informative) Check list of information to be provided with enquiry and order . 55 Annex B (informative) Examples of specifications for transformers with tappings . 59 Annex C (informative) Specification o
43、f short-circuit impedance by boundaries . 63 Annex D (informative) Examples of three-phase transformer connections 64 Annex E (normative) Temperature correction of load loss 67 Annex F (informative) Facilities for future fitting of condition monitoring systems to transformers . 68 Annex G (informati
44、ve) Environmental and safety considerations 69 Bibliography 70 Figure 1 Different types of voltage variation . 30 Figure 2 Illustration of clock number notation . 35 Figure 3 Illustration of clock number notation for transformers with open windings . 37 Figure 4 Illustration of clock number notation
45、 . 39 Figure C.1 Example of specification of short-circuit impedance by boundaries . 63 Figure D.1 Common connections . 64 Figure D.2 Additional connections 65 Figure D.3 Designation of connections of three-phase auto-transformers by connection symbols (auto-transformer Ya0) 66 Figure D.4 Example of
46、 three single-phase transformers connected to form a three-phase bank (connection symbol Yd5) 66 Table 1 Tolerances 44 Table B.1 Example of combined voltage variation 60 Table B.2 Example of functional specification with HV voltage variation . 61 Table B.3 Example of functional specification with LV
47、 voltage variation . 62 Table F.1 Facilities for condition monitoring . 68 BS EN 60079-1:2011BS EN 60076-1:201160076-1 IEC:201160076-1 IEC:2011 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ POWER TRANSFORMERS Part 1: General FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldw
48、ide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other act
49、ivities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC
