EN IEC 61788-4:2020
(Main)Superconductivity - Part 4: Residual resistance ratio measurement - Residual resistance ratio of Nb-Ti and Nb3Sn composite superconductors
Superconductivity - Part 4: Residual resistance ratio measurement - Residual resistance ratio of Nb-Ti and Nb3Sn composite superconductors
IEC 61788-4:2020 is available as IEC 61788-4:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61788-4:2020 specifies a test method for the determination of the residual resistance ratio (RRR) of Nb-Ti and Nb3Sn composite superconductors with Cu, Cu-Ni, Cu/Cu-Ni and Al matrix in a strain-free condition and zero external magnetic field. This method is intended for use with superconductor specimens that have a monolithic structure with rectangular or round cross-section, RRR value less than 350, and cross-sectional area less than 3 mm2. In the case of Nb3Sn, the specimens have received a reaction heat-treatment. This fifth edition cancels and replaces the fourth edition published in 2016. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) change in the suitable distance of voltage taps on the specimen for reliable measurement, b) new report on the result of the round robin test of the residual resistance ratio of Nb3Sn superconductors that proves the validity of the measurement method in this standard, c) revision of the confusing definitions of the copper ratio and copper fraction.
Supraleitfähigkeit - Teil 4: Messung des Restwiderstandsverhältnisses - Restwiderstandsverhältnis von Nb-Ti und Nb3Sn Verbundsupraleitern
Supraconductivité - Partie 4: Mesurage du rapport de résistance résiduelle - Rapport de résistance résiduelle des composites supraconducteurs de Nb-Ti et de Nb3Sn
IEC 61788-4:2020 est disponible sous forme de IEC 61788-4:2020 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.IEC 61788-4:2020 spécifie une méthode d'essai pour la détermination du rapport de résistance résiduelle (RRR) des composites supraconducteurs de Nb-Ti et de Nb3Sn avec une matrice de Cu, Cu-Ni, Cu/Cu-Ni et Al dans une condition sans contrainte et dans un champ magnétique externe nul. Cette méthode est destinée à être utilisée avec des éprouvettes de supraconducteurs présentant une structure monolithique avec une section rectangulaire ou circulaire, un RRR de valeur inférieure à 350 et une surface de section inférieure à 3 mm2. Dans le cas de Nb3Sn, les éprouvettes ont subi un traitement thermique de réaction. Cette cinquième édition annule et remplace la quatrième édition parue en 2016. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) modification de la distance adéquate des prises de tension sur les éprouvettes pour un mesurage fiable, b) nouveau rapport du résultat de l’essai interlaboratoire du rapport de résistance résiduelle des supraconducteurs Nb3Sn qui atteste de la validité de la méthode de mesure utilisée dans la présente norme, c) révision des définitions prêtant à confusion concernant le rapport entre le cuivre et la fraction de cuivre.
Superprevodnost - 4. del: Meritve razmerja preostale upornosti - Preostala upornost za superprevodnike iz kompozita Nb-Ti in Nb3Sn (IEC 61788-4:2020)
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN IEC 61788-4:2020
01-julij-2020
Nadomešča:
SIST EN 61788-4:2016
Superprevodnost - 4. del: Meritve razmerja preostale upornosti - Preostala
upornost za superprevodnike iz kompozita Nb-Ti in Nb3Sn (IEC 61788-4:2020)
Superconductivity - Part 4: Residual resistance ratio measurement - Residual resistance
ratio of Nb-Ti and Nb3Sn composite superconductors (IEC 61788-4:2020)
Supraleitfähigkeit - Teil 4: Messung des Restwiderstandsverhältnisses -
Restwiderstandsverhältnis von Nb-Ti und Nb3Sn Verbundsupraleitern (IEC 61788-
4:2020)
Supraconductivité - Partie 4: Mesurage du rapport de résistance résiduelle - Rapport de
résistance résiduelle des composites supraconducteurs de Nb-Ti et de Nb3Sn (IEC
61788-4:2020)
Ta slovenski standard je istoveten z: EN IEC 61788-4:2020
ICS:
17.200.20 Instrumenti za merjenje Temperature-measuring
temperature instruments
29.050 Superprevodnost in prevodni Superconductivity and
materiali conducting materials
SIST EN IEC 61788-4:2020 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN IEC 61788-4:2020
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SIST EN IEC 61788-4:2020
EUROPEAN STANDARD EN IEC 61788-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2020
ICS 17.220.20; 29.050 Supersedes EN 61788-4:2016 and all of its amendments
and corrigenda (if any)
English Version
Superconductivity - Part 4: Residual resistance ratio
measurement - Residual resistance ratio of Nb-Ti and Nb3Sn
composite superconductors
(IEC 61788-4:2020)
Supraconductivité - Partie 4: Mesurage du rapport de Supraleitfähigkeit - Teil 4: Messung des
résistance résiduelle - Rapport de résistance résiduelle des Restwiderstandsverhältnisses - Restwiderstandsverhältnis
composites supraconducteurs de Nb-Ti et de Nb3Sn von Nb-Ti und Nb3Sn Verbundsupraleitern
(IEC 61788-4:2020) (IEC 61788-4:2020)
This European Standard was approved by CENELEC on 2020-04-24. CENELEC members are bound to comply with the CEN/CENELEC
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 to 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 the 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
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Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61788-4:2020 E
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SIST EN IEC 61788-4:2020
EN IEC 61788-4:2020 (E)
European foreword
The text of document 90/448/FDIS, future edition 5 of IEC 61788-4, prepared by IEC/TC 90
"Superconductivity" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
EN IEC 61788-4:2020.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-01-24
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-04-24
document have to be withdrawn
This document supersedes EN 61788-4:2016 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 61788-4:2020 was approved by CENELEC as a European
Standard without any modification.
2
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SIST EN IEC 61788-4:2020
EN IEC 61788-4:2020 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
c
...
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