EN 61788-11:2011
(Main)Superconductivity - Part 11: Residual resistance ratio measurement - Residual resistance ratio of Nb3Sn composite superconductors
Superconductivity - Part 11: Residual resistance ratio measurement - Residual resistance ratio of Nb3Sn composite superconductors
IEC 61788-11:2011 covers a test method for the determination of the residual resistance ratio (RRR) of Nb3Sn composite superconductors. This method is intended for use with superconductor specimens that have a monolithic structure with rectangular or round cross-section, RRR less than 350 and cross-sectional area less than 3 mm2, and have received a reaction heat-treatment. Ideally, it is intended that the specimens be as straight as possible; however, this is not always the case, thus care must be taken to measure the specimen in its as received condition. All measurements are done without an applied magnetic field. The method described in the body of this standard is the 'reference' method and optional acquisition methods are outlined in Clause A.3. This second edition cancels and replaces the first edition published in 2003. It constitutes a technical revision. The main revisions are the addition of two new annexes, 'Uncertainty considerations' (Annex B) and 'Uncertainty evaluation in test method of RRR for Nb3Sn' (Annex C).
Supraleitfähigkeit - Teil 11: Messung des Restwiderstandsverhältnisses - Restwiderstandsverhältnis von Nb3Sn-Verbundsupraleitern
Supraconductivité - Partie 11: Mesure du rapport de résistance résiduelle - Rapport de résistance résiduelle des supraconducteurs composites de Nb3Sn
La CEI 61788-11:2011 spécifie une méthode d'essai pour la détermination du rapport de résistance résiduelle (RRR) des supraconducteurs composites de Nb3Sn. Cette méthode est destinée à être utilisée avec des éprouvettes de supraconducteurs présentant une structure monolithique avec une section rectangulaire ou circulaire, un rapport RRR inférieur à 350 et une surface de section inférieure à 3 mm2, et qui ont reçu un traitement thermique de réaction. Dans l'absolu, il est prévu que les éprouvettes soient aussi droites que possible; cependant, ce n'est pas toujours le cas, c'est pourquoi il faut s'assurer que la mesure est effectuée sur des éprouvettes en l'état de livraison. Toutes les mesures sont effectuées sans appliquer de champ magnétique. La méthode décrite dans le corps de texte de la présente norme est la méthode de 'référence' et des méthodes d'acquisition facultatives sont présentées à l'Article A.3. Cette deuxième édition annule et remplace la première édition parue en 2003, dont elle constitue une révision technique. Les principales révisions sont l'ajout de deux nouvelles annexes, 'Considérations relatives à l'incertitude' (Annexe B) et 'Evaluation de l'incertitude de la méthode d'essai de RRR de Nb3Sn' (Annexe C).
Superprevodnost - 11. del: Meritve razmerja preostale upornosti - Preostala upornost za superprevodnike iz kompozita Nb3Sn
Ta del IEC 61788 zajema preskusno metodo za določevanje razmerja preostale upornosti (RRR) za superprevodnike iz kompozita Nb3Sn. Ta metoda je namenjena uporabi z vzorci superprevodnikov, ki imajo monolitno strukturo s pravokotnim ali okroglim prečnim prerezom, RRR manj kot 350 in prerezom manj kot 3 mm2 ter so bili reakcijsko toplotno obdelani. V idealnem primeru naj bi bili vzorci čim bolj ravni, ker pa ni vedno tako, je treba paziti, da se vzorec izmeri v dobljenem stanju. Vse meritve se izvajajo brez vnesenega magnetnega polja. Metoda, opisana v glavnem delu tega standarda, je »referenčna« metoda, izbirne metode so navedene v točki A.3.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2011
Superprevodnost - 11. del: Meritve razmerja preostale upornosti - Preostala
upornost za superprevodnike iz kompozita Nb3Sn
Superconductivity - Part 11: Residual resistance ratio measurment - Residual resistance
ratio of Nb3Sn composite superconductors
Supraconductivité - Partie 11: Mesures de résistance résiduelle - Rapport de résistance
résiduelle des supraconducteurs composites de Nb3Sn
Ta slovenski standard je istoveten z: EN 61788-11:2011
ICS:
17.220.20 0HUMHQMHHOHNWULþQLKLQ Measurement of electrical
PDJQHWQLKYHOLþLQ and magnetic quantities
29.050 Superprevodnost in prevodni Superconductivity and
materiali conducting materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 61788-11
NORME EUROPÉENNE
August 2011
EUROPÄISCHE NORM
ICS 17.220; 29.050 Supersedes EN 61788-11:2003
English version
Superconductivity -
Part 11: Residual resistance ratio measurement -
Residual resistance ratio of Nb Sn composite superconductors
(IEC 61788-11:2011)
Supraconductivité - Supraleitfähigkeit -
Partie 11: Mesure du rapport de Teil 11: Messung des
résistance résiduelle - Restwiderstandsverhältnisses -
Rapport de résistance résiduelle des Restwiderstandsverhältnis von Nb Sn-
supraconducteurs composites de Nb Sn Verbundsupraleitern
(CEI 61788-11:2011) (IEC 61788-11:2011)
This European Standard was approved by CENELEC on 2011-08-15. 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 Central Secretariat 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 Central Secretariat 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,
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Spain, Sweden, Switzerland and the United Kingdom.
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European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
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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 61788-11:2011 E
Foreword
The text of document 90/268/FDIS, future edition 2 of IEC 61788-11, prepared by IEC TC 90,
Superconductivity was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
(dop) 2012-05-15
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2014-08-15
standards conflicting with the
document have to be withdrawn
This document supersedes EN 61788-11:2003.
The main revisions are the addition of two new annexes "Uncertainty considerations" (Annex B) and
"Uncertainty evaluation in test method of RRR for Nb Sn" (Annex C).
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 held responsible for identifying any or all such patent
rights.
Endorsement notice
The text of the International Standard IEC 61788-11:2011 was approved by CENELEC as a European
Standard without any modification.
- 3 - EN 61788-11:2011
Annex ZA
(normative)
Normative references to international publications
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.
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 60050-815 - International Electrotechnical Vocabulary - -
(IEV) -
Part 815: Superconductivity
IEC 61788-11 ®
Edition 2.0 2011-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Superconductivity –
Part 11: Residual resistance ratio measurement – Residual resistance ratio of
Nb Sn composite superconductors
Supraconductivité –
Partie 11: Mesure du rapport de résistance résiduelle – Rapport de résistance
résiduelle des supraconducteurs composites de Nb Sn
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX S
ICS 17.220; 29.050 ISBN 978-2-88912-581-4
– 2 – 61788-11 IEC:2011
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Requirements . 7
5 Apparatus . 7
5.1 Material of measuring base plate . 7
5.2 Length of the measuring base plate . 7
5.3 Cryostat for the resistance, R , measurement . 7
6 Specimen preparation. 8
7 Data acquisition and analysis . 8
7.1 Resistance (R ) at room temperature . 8
7.2 Resistance (R ) just above the superconducting transition . 8
7.3 Residual resistance ratio (RRR) . 10
8 Uncertainty and stability of the test method . 11
8.1 Temperature . 11
8.2 Voltage measurement. 11
8.3 Current . 11
8.4 Dimension . 11
9 Test report. 11
9.1 RRR value . 11
9.2 Specimen . 11
9.3 Test conditions . 12
Annex A (informative) Additional information relating to the measurement of RRR . 13
Annex B (informative) Uncertainty considerations . 15
Annex C (informative) Uncertainty evaluation in test method of RRR for Nb Sn . 19
Figure 1 – Relationship between temperature and resistance . 7
Figure 2 – Voltage (U) versus temperature (T) curves and definitions of each voltage . 9
Table B.1 – Output signals from two nominally identical extensometers . 16
Table B.2 – Mean values of two output signals . 16
Table B.3 – Experimental standard deviations of two output signals. 16
Table B.4 – Standard uncertainties of two output signals . 17
Table B.5 – Coefficient of variations of two output signals. 17
Table C.1 – Uncertainty of each measurement . 20
Table C.2 – Obtained values of R , R and RRR for three Nb Sn samples. 21
1 2 3
61788-11 IEC:2011 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SUPERCONDUCTIVITY –
Part 11: Residual resistance ratio measurement –
Residual resistance ratio of Nb Sn composite superconductors
FOREWORD
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8) Attention is drawn to the Normative references cited 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 any or all such patent rights.
International Standard IEC 61788-11 has been prepared by IEC Technical Committee 90:
Superconductivity.
This second edition cancels and replaces the first edition published in 2003. It constitutes a
technical revision. The main revisions are the addition of two new annexes, "Uncertainty
considerations" (Annex B) and "Uncertainty evaluation in test method of RRR for Nb Sn"
(Annex C).
– 4 – 61788-11 IEC:2011
The text of this standard is based on the following documents:
FDIS Report on voting
90/268/FDIS 90/279/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.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 61788 series, published under the general title Superconductivity,
can be found on the IEC website.
The committee has d
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