International Standards and Conformity Assessment for all electrical, electronic and related technologies



Reference EN 61788-5:2013
Title Superconductivity - Part 5: Matrix to superconductor volume ratio measurement - Copper to superconductor volume ratio of Cu/Nb-Ti composite superconducting wires
Project Number 24134
Abstract/Scope 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).


Current Stage code 6060
Current Stage code date 2013-09-06
Current Stage code deadline 2014-04-02
Deadline date for vote  


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IEC Technical Body IEC/TC 90
Reference Document IEC 61788-5:2013 (EQV)
ICS 17.220.20 - Measurement of electrical and magnetic quantities
29.050 - Conducting materials
Keywords Superconductivity; Matrix; Volume ratio; Copper; Composite
Note Supersedes EN 61788-5:2001
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2013-09-06 2014-04-02 export to doc file  EN  FR  DE
5099 2013-07-02 2013-07-30  
5060 2013-05-13 2013-06-03 export to doc file  EN
5020 2013-03-08 2013-05-10  
3090 2013-03-05 2013-03-08  
5060 2012-09-10 2012-10-01 export to doc file  EN
5020 2012-03-23 2012-09-07  
1090 2012-03-20 2012-03-23  

Implementation Dates

date of Ratification (DOR) (1) 2013-07-02
date of Availability (DAV) (2) 2013-09-06
date of Announcement (DOA) (3) 2013-10-02
date of Publication (DOP) (4) 2014-04-02
date of Withdrawal (DOW) (5) 2016-07-02


Supersedes EN 61788-5:2001
Superseded by  
Normative reference (6) IEC 60050-815:2000

(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved

(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat

(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level

(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement

(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn

(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.