1、BSI Standards PublicationSuperconductivityPart 21: Superconducting wires Test methods for practical superconducting wires General characteristics and guidanceBS EN 61788-21:2015National forewordThis British Standard is the UK implementation of EN 61788-21:2015. It isidentical to IEC 61788-21:2015.Th
2、e UK participation in its preparation was entrusted to TechnicalCommittee L/-/90, Super Conductivity.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions ofa contract. Users are resp
3、onsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 79103 1ICS 17.220; 29.050; 77.040.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authorit
4、y of theStandards Policy and Strategy Committee on 31 July 2015.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 61788-21:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61788-21 July 2015 ICS 17.220; 29.050; 77.040.10 English Version Superconductivity -
5、 Part 21: Superconducting wires - Test methods for practical superconducting wires - General characteristics and guidance (IEC 61788-21:2015) Supraconductivit - Partie 21: Fils supraconducteurs - Mthodes dessai pour fils supraconducteurs usage pratique - Caractristiques gnrales et lignes directrices
6、 (IEC 61788-21:2015) Supraleitfhigkeit - Teil 21: Supraleiterdrhte - Prfverfahren fr technische Supraleiterdrhte - Allgemeine Eigenschaften und Anleitung (IEC 61788-21:2015) This European Standard was approved by CENELEC on 2015-06-23. CENELEC members are bound to comply with the CEN/CENELEC Interna
7、l 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 to any CE
8、NELEC 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 the offici
9、al versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Ma
10、lta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC
11、 Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 61788-21:2015 E BS EN 61788-21:2015EN 61788-21:2015 2 European foreword The text of document 90/353/FDIS, future edition 1 of
12、 IEC 61788-21, prepared by IEC/TC 90 “Superconductivity“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 61788-21:2015. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standa
13、rd or by endorsement (dop) 2016-03-23 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2018-06-23 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be
14、held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 61788-21:2015 was approved by CENELEC as a European Standard without any modification. BS EN 61788-21:2015EN 61788-21:2015 3 Annex ZA (normative) Normative references to inte
15、rnational publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition
16、of the referenced document (including any amendments) applies. NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is av
17、ailable here: www.cenelec.eu. Publication Year Title EN/HD Year IEC 60050 series International electrotechnical vocabulary - - IEC 61788-1 - Superconductivity - Part 1: Critical current measurement - DC critical current of Nb-Ti composite superconductors EN 61788-1 - IEC 61788-2 - Superconductivity
18、- Part 2: Critical current measurement - DC critical current of Nb3Sn composite superconductors EN 61788-2 - IEC 61788-3 - Superconductivity - Part 3: Critical current measurement - DC critical current of Ag- and/or Ag alloy-sheathed Bi-2212 and Bi-2223 oxide superconductors EN 61788-3 - IEC 61788-4
19、 - Superconductivity - Part 4: Residual resistance ratio measurement - Residual resistance ratio of Nb-Ti composite superconductors EN 61788-4 - IEC 61788-5 - Superconductivity - Part 5: Matrix to superconductor volume ratio measurement - Copper to superconductor volume ratio of Cu/Nb-Ti composite s
20、uperconducting wires EN 61788-5 - IEC 61788-6 - Superconductivity - Part 6: Mechanical properties measurement - Room temperature tensile test of Cu/Nb-Ti composite superconductors EN 61788-6 - BS EN 61788-21:2015EN 61788-21:2015 4 Publication Year Title EN/HD Year IEC 61788-8 - Superconductivity - P
21、art 8: AC loss measurements - Total AC loss measurement of round superconducting wires exposed to a transverse alternating magnetic field at liquid helium temperature by a pickup coil method EN 61788-8 - IEC 61788-10 - Superconductivity - Part 10: Critical temperature measurement - Critical temperat
22、ure of composite superconductors by a resistance method EN 61788-10 - IEC 61788-11 - Superconductivity - Part 11: Residual resistance ratio measurement - Residual resistance ratio of Nb3Sn composite superconductors EN 61788-11 - IEC 61788-12 - Superconductivity - Part 12: Matrix to superconductor vo
23、lume ratio measurement - Copper to non-copper volume ratio of Nb3Sn composite superconducting wires EN 61788-12 - IEC 61788-13 - Superconductivity - Part 13: AC loss measurements - Magnetometer methods for hysteresis loss in superconducting multifilamentary composites EN 61788-13 - IEC 61788-18 - Su
24、perconductivity - Part 18: Mechanical properties measurement - Room temperature tensile test of Ag- and/or Ag alloy-sheathed Bi-2223 and Bi-2212 composite superconductors EN 61788-18 - IEC 61788-19 - Superconductivity - Part 19: Mechanical properties measurement - Room temperature tensile test of re
25、acted Nb3Sn composite superconductors EN 61788-19 - BS EN 61788-21:2015 2 IEC 61788-21:2015 IEC 2015 CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope 6 2 Normative references 6 3 Terms and definitions 7 4 Characteristic attributes of practical SC wires 7 5 Categories of properties 7 6 Properties gover
26、ned by IEC standards . 7 6.1 General . 7 6.2 Properties referring to the operation of SC wires . 7 6.3 Properties related to implementation and engineering . 8 Annex A (informative) Characteristic attributes of practical SC wires 9 A.1 General . 9 A.2 Critical temperature 9 A.3 Critical magnetic and
27、 irreversibility fields 9 A.4 Critical current and n-value . 10 A.5 Stability. 10 A.6 AC loss . 10 A.7 Strain-dependent superconducting properties . 10 A.8 Mechanical properties . 11 A.9 Uniformity of properties . 11 Bibliography 12 BS EN 61788-21:2015IEC 61788-21:2015 IEC 2015 3 INTERNATIONAL ELECT
28、ROTECHNICAL COMMISSION _ SUPERCONDUCTIVITY Part 21: Superconducting wires Test methods for practical superconducting wires General characteristics and guidance FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national elec
29、trotechnical 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 activities, IEC publishes International Standards, Technical Specifi
30、cations, 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. Internatio
31、nal, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal d
32、ecisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for in
33、ternational use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In
34、 order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be
35、 clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certificat
36、ion bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury,
37、property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited
38、 in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying
39、 any or all such patent rights. International Standard IEC 61788-21 has been prepared by IEC technical committee 90: Superconductivity. The text of this standard is based on the following documents: FDIS Report on voting 90/353/FDIS 90/354/RVD Full information on the voting for the approval of this
40、standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all the parts in the IEC 61788 series, published under the general title Superconductivity, can be found on the IEC website. BS E
41、N 61788-21:2015 4 IEC 61788-21:2015 IEC 2015 The committee has decided that the contents of this publication will remain unchanged 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
42、be reconfirmed, withdrawn, replaced by a revised edition, or amended. BS EN 61788-21:2015IEC 61788-21:2015 IEC 2015 5 INTRODUCTION Superconducting (SC) wires are a central and often enabling technology of many important industrial products. Consensus-based standards for SC wires greatly facilitate t
43、he creation of procurement specifications, design and engineering of components, certification of quality, description of operating devices, and generalization of use in industrial technologies. This part of IEC 61788 is ranked as a first priority for both producers and users of superconducting tech
44、nology: It provides the measurement methods and test procedures for properties critical to use. Adherence to normative information assists the development of commercial markets and the distribution of products. Standardization in this regard is meant to provide common access to, and unarguable refer
45、ence information about, characteristics that are most important for superconductor-based technologies. This part of IEC 61788 includes the measurement principles and measurement techniques together with the relevant terminology and definitions. Specifications of SC wire products take into account th
46、e function of the different components of SC wires to meet operational needs, maintain operational (superconducting) conditions, and accommodate mechanical forces and strains. The various forms of SC wire products distributed by manufacturers incorporate these aspects to varying degrees, depending o
47、n the superconducting materials used and the intended operating conditions/environment. Design and engineering of devices that use SC wire products take into account the unique properties of SC wires during operation. The general features of practical SC wires are described in IEC TR 61788-20 in ter
48、ms of simple general characteristics to assist in the specification and use of superconducting wire products. Testing, certification, and quality control apply the relevant standard test methods to SC wires, which are specified in this part of IEC 61788. BS EN 61788-21:2015 6 IEC 61788-21:2015 IEC 2
49、015 SUPERCONDUCTIVITY Part 21: Superconducting wires Test methods for practical superconducting wires General characteristics and guidance 1 Scope This part of IEC 61788 specifies the test methods used for validating the mechanical, electrical, and superconducting properties of practical SC wires. A wire is considered as being practical if it can be procured in sufficiently continuous lengths under ordinary commercial transactions to build devices. Conductors made of
