BS-EN-60076-5-2006.pdf
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1、BRITISH STANDARD BS EN 60076-5:2006 Power transformers Part 5: Ability to withstand short-circuit The European Standard EN 60076-5:2006 has the status of a British Standard ICS 29.180 ? Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 14:58:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 6
2、0076-5:2006 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2006 BSI 2006 ISBN 0 580 48784 9 National foreword This British Standard is the official English language version of EN 60076-5:2006. It is identical with IEC 60076-5:2006. I
3、t supersedes BS EN 60076-5:2001 which will be withdrawn on 1 April 2009. The UK participation in its preparation was entrusted to Technical Committee PEL/14, Power transformers, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its s
4、ecretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Ca
5、talogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understan
6、d the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a fron
7、t cover, an inside front cover, the EN title page, pages 2 to 36, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun,
8、na, Fri Nov 10 14:58:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN 60076-5 NORME EUROPENNE EUROPISCHE NORM June 2006 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung C
9、entral Secretariat: rue de Stassart 35, B - 1050 Brussels 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60076-5:2006 E ICS 29.180 Supersedes EN 60076-5:2000 English version Power transformers Part 5: Ability to withstand sh
10、ort-circuit (IEC 60076-5:2006) Transformateurs de puissance Partie 5: Tenue au court-circuit (CEI 60076-5:2006) Leistungstransformatoren Teil 5: Kurzschlussfestigkeit (IEC 60076-5:2006) This European Standard was approved by CENELEC on 2006-04-01. CENELEC members are bound to comply with the CEN/CEN
11、ELEC 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 Central Secretariat or to any
12、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 Central Secretariat has the same status as the official versi
13、ons. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia,
14、 Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 14:58:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Foreword The text of document 14/518/FDIS, future edition 3 of IEC 60076-5, prepared by IEC TC 14, Power transformers, was submitte
15、d to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60076-5 on 2006-04-01. This European Standard supersedes EN 60076-5:2000. This European Standard includes the following significant technical changes with respect to EN 60076-5:2000: a) introduction of Annex A (informative) “Theore
16、tical evaluation of the ability to withstand the dynamic effects of short circuit“, in place of previous Annex B (normative) “Calculation method for the demonstration of the ability to withstand short circuit“ (blank); b) introduction of Annex B (informative) “Definition of similar transformer“, in
17、place of previous Annex A (informative) “Guidance for the identification of a similar transformer“. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2007-01-01 latest date by w
18、hich the national standards conflicting with the EN have to be withdrawn (dow) 2009-04-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60076-5:2006 was approved by CENELEC as a European Standard without any modification. _ EN 60076-5:2006 2 Lice
19、nsed Copy: sheffieldun sheffieldun, na, Fri Nov 10 14:58:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3 EN 60076-5:2006 CONTENTS 1 Scope 4 2 Normative references .4 3 Requirements with regard to ability to withstand short circuit .4 3.1 General.4 3.2 Overcurrent conditions.5 4 Demonstration of abil
20、ity to withstand short circuit 8 4.1 Thermal ability to withstand short circuit.8 4.2 Ability to withstand the dynamic effects of short circuit .11 Annex A (informative) Theoretical evaluation of the ability to withstand the dynamic effects of short circuit .20 Annex B (informative) Definition of si
21、milar transformer35 Annex ZA (normative) Normative references to international publications with their corresponding European publications36 Figure 1 Star/delta connected transformer14 Figure 2 Star/star auto-transformer.15 Table 1 Recognized minimum values of short-circuit impedance for transformer
22、s with two separate windings .6 Table 2 Short-circuit apparent power of the system.6 Table 3 Maximum permissible values of the average temperature of each winding after short circuit.10 Table 4 Values for factor k 212 Table A.1 Comparison of forces and stresses in core-type transformers30 Table A.2
23、Comparison of forces and stresses in shell-type transformers .32 Table A.3 Values for factor K3.34 Table A.4 Values for factor K4.34 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 14:58:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60076-5:2006 4 POWER TRANSFORMERS Part 5: Ability to with
24、stand short circuit 1 Scope This part of IEC 60076 identifies the requirements for power transformers to sustain without damage the effects of overcurrents originated by external short circuits. It describes the calculation procedures used to demonstrate the thermal ability of a power transformer to
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