EN 61788-5:2013

Superconductivity - Part 5: Matrix to superconductor volume ratio measurement - Copper to superconductor volume ratio of Cu/Nb-Ti composite superconducting wires

IEC 61788-5:2013 covers a test method for the determination of copper to superconductor volume ratio of Cu/Nb-Ti composite superconducting wires. This test method and the alternate method in Annex are intended for use with Cu/Nb-Ti composite superconducting wires with a cross-sectional area of 0,1 mm2 to 3 mm2, a diameter of the Nb-Ti filament(s) of 2 micrometers to 200 micrometers, and a copper to superconductor volume ratio of 0,5 or more. The Cu/Nb-Ti composite test conductor discussed in this method has a monolithic structure with a round or rectangular cross-section. This test method is carried out by dissolving the copper with nitric acid. Deviations from this test method that are allowed for routine tests and other specific restrictions are given in this standard. Cu/Nb-Ti composite superconducting wires beyond the limits in the cross-sectional area, the filament diameter and the copper to superconductor volume ratio could be measured with this present method with an anticipated reduction of uncertainty. Other, more specialized, specimen test geometries may be more appropriate for conductors beyond the limits and have been omitted from this present standard for simplicity and to retain low uncertainty. The test method given in this standard is expected to apply to other superconducting composite wires after some appropriate modifications. The copper to superconductor volume ratio of composite superconductors is used mainly to calculate the critical current density of superconducting wires. The test with the method given in this International Standard may be used to provide part of the information needed to determine the suitability of a specific superconductor. Moreover, this method is useful for quality control, acceptance or research testing if the precautions given in this standard are observed. This second edition cancels and replaces the first edition published in 2000. It constitutes a technical revision. The main revisions are the addition of two new annexes, 'Uncertainty considerations' (Annex E) and 'Uncertainty evaluation in test method of copper to superconductor volume ratio of Cu/Nb-Ti composite superconductors' (Annex F).

Supraleitfähigkeit - Teil 5: Messung des Verhältnisses von Matrixvolumen zu Supraleitervolumen - Verhältnis von Kupfervolumen zu Supraleitervolumen von Cu/Nb-Ti Verbundsupraleiterdrähten

Supraconductivité - Partie 5 : Mesure du rapport volumique matrice/supraconducteur - Rapport volumique cuivre/supraconducteur des fils en composite supraconducteur Cu/Nb-Ti

La IEC 61788-5:2013 spécifie une méthode d'essai pour déterminer le rapport volumique cuivre/supraconducteur de fils en composite supraconducteur Cu/Nb-Ti. Cette méthode d'essai et l'autre méthode de l'Annexe A sont destinées à être utilisées avec des fils en composite supraconducteur Cu/Nb-Ti ayant une section de 0,1 mm2 à 3 mm2, un diamètre du ou des filaments de Nb-Ti de 2 micromètres à 200 micromètres et un rapport volumique cuivre/supraconducteur supérieur ou égal à 0,5. Le conducteur d'essai composite Cu/Nb-Ti présenté dans cette méthode possède une structure monolithique avec une section ronde ou rectangulaire. Cette méthode d'essai est réalisée en dissolvant le cuivre dans de l'acide nitrique. Les écarts par rapport à cette méthode d'essai qui sont admis pour les essais périodiques et les autres restrictions spécifiques sont mentionnés dans la présente norme. Les fils en composite supraconducteur Cu/Nb-Ti dépassant les limites de la section, du diamètre de filament et du rapport volumique cuivre/supraconducteur peuvent être mesurés avec la présente méthode au moyen d'une réduction d'incertitude anticipée. D'autres géométries d'éprouvettes plus spécialisées peuvent être plus appropriées à des conducteurs dépassant les limites et ont été omises de la présente norme pour la simplifier et pour conserver une faible incertitude. On s'attend à appliquer la méthode d'essai donnée dans cette norme à d'autres fils en composite supraconducteur après y avoir apporté certaines modifications appropriées. Le rapport volumique cuivre/supraconducteur des composites supraconducteurs est utilisé principalement pour calculer la densité de courant critique des fils supraconducteurs. L'essai effectué avec la méthode donnée dans la présente Norme internationale peut être utilisé pour fournir une partie des informations nécessaires pour déterminer la pertinence d'un supraconducteur spécifique. De plus, cette méthode est utile pour le contrôle qualité, l'essai d'acceptation ou de recherche si les précautions données dans cette norme sont observées. Cette deuxième édition annule et remplace la première édition parue en 2000, dont elle constitue une révision technique. Les principales révisions sont l'ajout de deux nouvelles annexes, 'Considérations relatives à l'incertitude' (Annexe E) et 'Évaluation de l'incertitude de la méthode d'essai du rapport volumique cuivre/supraconducteur des composites supraconducteurs Cu/Nb-Ti' (Annexe F).

Superprevodnost - 5. del: Matrika za merjenje superprevodniškega volumenskega razmerja - Razmerje med bakrom in superprevodniškim volumenskim razmerjem superprevodnih žic iz kompozita Cu/Nb-Ti (IEC 61788-5:2013)

Ta del standarda IEC 61788 opisuje preskusno metodo za merjenje razmerja med bakrom in superprevodniškim volumenskim razmerjem superprevodnih žic iz kompozita Cu/Nb-Ti. Ta testna metoda in alternativna metoda v dodatku A sta namenjeni za uporabo pri superprevodnih žicah iz kompozita Cu/Nb-Ti s prerezom od 0,1 do 3 mm2, premerom filamentov Nb-Ti od 2 do 200 μm ter razmerjem med bakrom in superprevodniškim volumenskim razmerjem 0,5 ali več. Preskušani prevodnik iz kompozita Cu/Nb-Ti iz te metode ima monolitno strukturo z okroglim ali pravokotnim prerezom. Ta preskusna metoda se izvede z raztapljanjem bakra z dušikovo kislino. Odstopanja od te testne metode, ki so dovoljena za rutinske preskuse in druge specifične omejitve, so navedena v tem standardu. Superprevodne žice iz kompozita Cu/Nb-Ti, ki presegajo mejne vrednosti prereza, premera filamenta in razmerja med bakrom in superprevodniškim volumenskim razmerjem, se lahko izmerijo s to metodo s pričakovanim zmanjšanjem negotovosti. Druge, bolj specializirane, preskusne geometrije preskusnih vzorcev so morda bolj primerne za prevodnike, ki presegajo mejne vrednosti, ter zaradi poenostavitve in za zagotovitev nizke negotovosti niso vključene v tem standardu. Preskusna metoda, navedena v tem standardu, se predvidoma lahko uporablja za druge superprevodne kompozitne žice po nekaterih ustreznih prilagoditvah.

General Information

• Status: Published
• Publication Date: 05-Sep-2013
• Withdrawal Date: 01-Jul-2016
• ICS: 17.200.20 - Temperature-measuring instruments
• 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
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 06-Sep-2013
• Completion Date: 06-Sep-2013
• Ref Project: SIST EN 61788-5:2014 - Superconductivity - Part 5: Matrix to superconductor volume ratio measurement - Copper to superconductor volume ratio of Cu/Nb-Ti composite superconducting wires

Relations

• Replaces: EN 61788-5:2001 - Superconductivity - Part 5: Matrix to superconductor volume ratio measurement - Copper to superconductor volume ratio of Cu/Nb-Ti composite superconductors
• Effective Date: 29-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2014
1DGRPHãþD
SIST EN 61788-5:2002
Superprevodnost - 5. del: Matrika za merjenje superprevodniškega volumenskega
razmerja - Razmerje med bakrom in superprevodniškim volumenskim razmerjem
superprevodnih žic iz kompozita Cu/Nb-Ti (IEC 61788-5:2013)
Superconductivity - Part 5: Matrix to superconductor volume ratio measurement - Copper
to superconductor volume ratio of Cu/Nb-Ti composite superconducting wires
Supraleitfähigkeit - Teil 5: Messung des Verhältnisses von Matrixvolumen zu
Supraleitervolumen - Verhältnis von Kupfervolumen zu Supraleitervolumen von Cu/NbTi-
Verbundsupraleitern
Supraconductivté - Partie 5 : Mesure du rapport volumique matrice/supraconducteur -
Rapport volumique cuivre/supraconducteur des fils en composite supraconducteur
Cu/Nb-Ti
Ta slovenski standard je istoveten z: EN 61788-5:2013
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 61788-5
NORME EUROPÉENNE
September 2013
EUROPÄISCHE NORM
ICS 17.220.20; 29.050 Supersedes EN 61788-5:2001

English version
Superconductivity -
Part 5: Matrix to superconductor volume ratio measurement -
Copper to superconductor volume ratio of Cu/Nb-Ti composite
superconducting wires
(IEC 61788-5:2013)
Supraconductivité -  Supraleitfähigkeit -
Partie 5 : Mesure du rapport volumique Teil 5: Messung des Verhältnisses von
matrice/supraconducteur - Matrixvolumen zu Supraleitervolumen -
Rapport volumique Verhältnis von Kupfervolumen zu
cuivre/supraconducteur des fils en Supraleitervolumen von Cu/Nb-Ti
composite supraconducteur Cu/Nb-Ti Verbundsupraleiterdrähten
(CEI 61788-5:2013) (IEC 61788-5:2013)

This European Standard was approved by CENELEC on 2013-07-02. 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, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

CEN-CENELEC Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61788-5:2013 E
Foreword
The text of document 90/321/FDIS, future edition 2 of IEC 61788-5, 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) 2014-04-02
• 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) 2016-07-02
standards conflicting with the
document have to be withdrawn
This document supersedes EN 61788-5:2001.

EN 61788-5:2001:
The main revisions are the addition of two new annexes, "Uncertainty considerations" (Annex E) and
"Uncertainty evaluation in test method of copper to superconductor volume ratio of Cu/Nb-Ti
composite superconductors" (Annex F).

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 61788-5:2013 was approved by CENELEC as a European
Standard without any modification.

- 3 - EN 61788-5:2013
Annex ZA
(normative)
Normative references to international 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 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 Series International Electrotechnical Vocabulary - -
(IEV)
IEC 61788-5 ®
Edition 2.0 2013-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Superconductivity –
Part 5: Matrix to superconductor volume ratio measurement – Copper to

superconductor volume ratio of Cu/Nb-Ti composite superconducting wires

Supraconductivité –
Partie 5: Mesure du rapport volumique matrice/supraconducteur – Rapport

volumique cuivre/supraconducteur des fils en composite supraconducteur

Cu/Nb-Ti
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX T
ICS 17.220.20; 29.050 ISBN 978-2-83220-831-1

– 2 – 61788-5 © IEC:2013
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Principle . 7
5 Chemicals . 7
6 Apparatus . 7
7 Measurement procedure . 8
7.1 Quantity of specimen . 8
7.2 Removal of insulating cover material . 8
7.3 Cleaning . 8
7.4 Drying . 8
7.5 Measurement of specimen mass and its repetition . 8
7.6 Dissolving copper . 8
7.7 Cleaning and drying the Nb-Ti filaments . 9
7.8 Measurement of dissolved specimen mass and its repetition . 9
7.9 Procedural repetition for second specimen . 10
8 Calculation of results . 10
9 Uncertainty of the test method . 10
10 Test report . 11
10.1 Identification of test specimen . 11
10.2 Report of copper to superconductor volume ratio . 11
10.3 Report of test conditions . 11
Annex A (normative) Copper to superconductor volume ratio – copper mass method . 12
Annex B (informative) Specific mass depending on Nb-Ti fraction . 14
Annex C (information) Mechanical removal of insulating cover materials . 15
Annex D (informative) Second etch of specimen . 16
Annex E (informative) Uncertainty considerations . 17
Annex F (informative) Uncertainty evaluation in the test method of copper to
superconductor volume ratio of Cu/Nb-Ti composite superconductors . 22

Table B.1 – Specific mass of Nb-Ti . 14
Table E.1 – Output signals from two nominally identical extensometers . 18
Table E.2 – Mean values of two output signals . 18
Table E.3 – Experimental standard deviations of two output signals . 18
Table E.4 – Standard uncertainties of two output signals . 19
Table E.5 – Coefficient of variations of two output signals . 19

61788-5 © IEC:2013 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SUPERCONDUCTIVITY –
Part 5: Matrix to superconductor volume ratio measurement –
Copper to superconductor volume ratio of Cu/Nb-Ti composite
superconducting wires
FOREWORD
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