EN 61788-4:2011

Superconductivity - Part 4: Residual resistance ratio measurement - Residual resistance ratio of Nb-Ti composite superconductors

IEC 61788-4:2011 covers a test method for the determination of the residual resistance ratio (RRR) of composite superconductors comprised of Nb-Ti filaments and Cu, Cu-Ni or Cu/Cu-Ni matrix. This method is intended for use with superconductors that have a monolithic structure with rectangular or round cross-section, RRR less than 350, and cross-sectional area less than 3 mm2. 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 third edition constitutes a technical revision which adds two new annexes: 'Uncertainty considerations' (Annex B) and 'Uncertainty evaluation in test method of RRR for NbTi' (Annex C). Copper is used as a matrix material in multifilamentary superconductors and works as an electrical shunt when the superconductivity is interrupted. It also contributes to recovery of the superconductivity by conducting heat generated in the superconductor to the surrounding coolant. The cryogenic-temperature resistivity of copper is an important quantity, which influences the stability of the superconductor. The residual resistance ratio is defined as a ratio of the resistance of the superconductor at room temperature to that just above the superconducting transition.

Supraleitfähigkeit - Teil 4: Messung des Restwiderstandsverhältnisses - Restwiderstandsverhältnis von Nb-Ti Verbundsupraleitern

Supraconductivité - Partie 4: Mesure du rapport de résistance résiduelle - Rapport de résistance résiduelle des supraconducteurs composites de Nb-Ti

La CEI 61788-4:2011 spécifie une méthode d'essai pour la détermination du rapport de résistance résiduelle (RRR) de supraconducteurs composites constitués de filaments de Nb-Ti et d'une matrice de Cu, Cu-Ni ou Cu/Cu-Ni. Cette méthode est destinée à être utilisée avec des 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. 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 troisième édition constitue une révision technique qui ajoute deux nouvelles annexes: 'Considérations relatives à l'incertitude' (Annexe B) et 'Evaluation de l'incertitude de la méthode d'essai de RRR (rapport de résistance résiduelle) de NbTi' (Annexe C). Le cuivre est utilisé comme matériau de matrice dans les supraconducteurs multifilamentaires et fonctionne comme une dérivation électrique lorsque la supraconductivité est interrompue. Il contribue également à la reprise de la supraconductivité en dirigeant la chaleur générée dans le supraconducteur vers le fluide de refroidissement environnant. La résistivité à la température cryogénique du cuivre est une grandeur importante qui influe sur la stabilité du supraconducteur. Le rapport de résistance résiduelle est défini comme le rapport entre la résistance du supraconducteur à température ambiante et celle immédiatement supérieure à la transition supraconductrice.

Superprevodnost - 4. del: Meritve razmerja preostale upornosti - Preostala upornost za superprevodnike iz kompozita Nb-Ti

Ta del IEC 61788 zajema preskusno metodo za določevanje razmerja preostale upornosti (RRR) za kompozitne superprevodnike iz vlaken Nb-Ti in Cu, Cu-Ni ali matrice Cu/Cu-Ni. 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. Vse meritve se izvajajo brez vnesenega magnetnega polja. Metoda, opisana v glavnem delu tega standarda, je »referenčna«, izbirne metode so navedene v točki A.3.

General Information

• Status: Withdrawn
• Publication Date: 25-Aug-2011
• Withdrawal Date: 14-Aug-2014
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• ICS: 29.050 - Superconductivity and conducting materials
• Technical Committee: CLC/SR 90 - Superconductivity
• Drafting Committee: IEC/TC 90 - IEC_TC_90
• Parallel Committee: IEC/TC 90 - IEC_TC_90
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 23-Feb-2019
• Completion Date: 23-Feb-2019
• Ref Project: SIST EN 61788-4:2011 - Superconductivity - Part 4: Residual resistance ratio measurement - Residual resistance ratio of Nb-Ti composite superconductors

Relations

• Replaces: EN 61788-4:2007 - Superconductivity - Part 4: Residual resistance ratio measurement - Residual resistance ratio of Nb-Ti composite superconductors
• Effective Date: 29-Jan-2023
• Replaced By: EN 61788-4:2016 - Superconductivity - Part 4: Residual resistance ratio measurement - Residual resistance ratio of Nb-Ti and Nb3Sn composite superconductors
• Effective Date: 24-Nov-2014

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 61788-4:2011
01-oktober-2011
Superprevodnost - 4. del: Meritve razmerja preostale upornosti - Preostala
upornost za superprevodnike iz kompozita Nb-Ti
Superconductivity - Part 4: Residual resistance ratio measurement - Residual resistance
ratio of Nb-Ti composite superconductors
Supraleitfähigkeit - Teil 4: Messungen des Restwiderstandsverhältnisses -
Restwiderstandsverhältnis von Nb-Ti-Verbundsupraleitern
Supraconductivité - Partie 4: Mesure de la résistivité résiduelle - Taux de résistivité
résiduelle des supraconducteurs composites au Nb-Ti
Ta slovenski standard je istoveten z: EN 61788-4:2011
ICS:
17.220.20 0HUMHQMHHOHNWULþQLKLQ Measurement of electrical
PDJQHWQLKYHOLþLQ and magnetic quantities
29.050 Superprevodnost in prevodni Superconductivity and
materiali conducting materials
SIST EN 61788-4:2011 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 61788-4:2011

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SIST EN 61788-4:2011

EUROPEAN STANDARD
EN 61788-4

NORME EUROPÉENNE
August 2011
EUROPÄISCHE NORM

ICS 17.220.20; 29.050 Supersedes EN 61788-4:2007


English version


Superconductivity -
Part 4: Residual resistance ratio measurement -
Residual resistance ratio of Nb-Ti composite superconductors
(IEC 61788-4:2011)


Supraconductivité -  Supraleitfähigkeit -
Partie 4: Mesure du rapport de résistance Teil 4: Messung des
résiduelle - Restwiderstandsverhältnisses -
Rapport de résistance résiduelle des Restwiderstandsverhältnis von Nb-Ti
supraconducteurs composites de Nb-Ti Verbundsupraleitern
(CEI 61788-4:2011) (IEC 61788-4:2011)





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.

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© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61788-4:2011 E

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SIST EN 61788-4:2011
EN 61788-4:2011 - 2 -
Foreword
The text of document 90/263/FDIS, future edition 3 of IEC 61788-4, prepared by IEC TC 90,
Superconductivity was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
EN 61788-4:2011.
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 61788-4:2007.
The main revisions are the addition of two new annexes, "Uncertainty considerations" (Annex B) and
"Uncertainty evaluation in test method of RRR for NbTi" (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 61788-4:2011 was approved by CENELEC as a European
Standard without any modification.

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SIST EN 61788-4:2011
- 3 - EN 61788-4:2011
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 i
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