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Reference EN 61788-12:2013
Title Superconductivity - Part 12: Matrix to superconductor volume ratio measurement - Copper to non-copper volume ratio of Nb3Sn composite superconducting wires
Project Number 24135
Abstract/Scope IEC 61788-12:2013 describes a test method for determining the copper to non-copper volume ratio of Cu/Nb3Sn wires. The test method given hereunder is applicable to Nb3Sn composite superconducting wires with a cross-sectional area of 0,1 mm2 to 3,0 mm2 and a copper to non-copper volume ratio of 0,1 or more. It does not make any reference to the filament diameter; however, it is not applicable to those superconducting wires with their filament, Sn, Cu-Sn alloy, barrier material and other non-copper portions dispersed in the copper matrix or those with the stabilizer dispersed. Furthermore, the copper to non-copper volume ratio can be determined on specimens before or after the Nb3Sn formation heat treatment process. The Cu/Nb3Sn wire has a monolithic structure with a round or rectangular cross-section. Though uncertainty increases, this method may be applicable to the measurement of the copper to non-copper volume ratio of the Cu/Nb3Sn wires whose cross-section and copper to non-copper volume ratio fall outside the specified ranges. This test method may be applied to other composite superconducting wires after some appropriate modifications. This second edition cancels and replaces the first edition published in 2002. It constitutes a technical revision. The main revision is the addition of two new annexes, 'Uncertainty considerations' and 'Uncertainty evaluation in the test method of the copper to non-copper volume ratio of Nb3Sn composite superconducting wires'.


Current Stage code 6060
Current Stage code date 2013-10-04
Current Stage code deadline 2014-04-17
Deadline date for vote  


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IEC Technical Body IEC/TC 90
Reference Document IEC 61788-12:2013 (EQV)
ICS 29.050 - Conducting materials
Keywords Superconductor; Matrix; Volume ratio measurement; Nb3Sn composite; Wire
Note Supersedes EN 61788-12:2002
Special National Condition(s)  


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Product Life Cycle


Deadline Date
6060 2013-10-04 2014-04-17 export to doc file  EN  FR  DE
5099 2013-07-17 2013-08-14  
5060 2013-05-27 2013-06-17 export to doc file  EN
5020 2013-03-22 2013-05-24  
3090 2013-03-19 2013-03-22  
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) 2013-07-17
date of Availability (DAV) (2) 2013-10-04
date of Announcement (DOA) (3) 2013-10-17
date of Publication (DOP) (4) 2014-04-17
date of Withdrawal (DOW) (5) 2016-07-17


Supersedes EN 61788-12:2002
Superseded by  
Normative reference (6) IEC 60050 series
EN 61788-5

(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.