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Reference EN 61788-4:2007
Title Superconductivity - Part 4: Residual resistance ratio measurement - Residual resistance ratio of Nb-Ti composite superconductors
Project Number 16780
Abstract/Scope Describes a reference method for the determination of the residual resistance ratio (RRR) of a composite superconductor 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 rectangular or round cross-section, RRR less than 350, and cross-sectional area less than 3 mm2. All measurements shall be done without an applied magnetic field. Optional acquisition methods are outlined in annex A.


Current Stage code 6060
Current Stage code date 2007-07-27
Current Stage code deadline 2008-04-01
Deadline date for vote  


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IEC Technical Body IEC/TC 90
Reference Document IEC 61788-4:2007 (EQV)
ICS 17.220.20 - Measurement of electrical and magnetic quantities
29.050 - Conducting materials
Keywords Superconductivity; Superconductor; Residual resistance ratio; Nb-Ti composite
Note Superseded by EN 61788-4:2011
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2007-07-27 2008-04-01 export to doc file  EN  DE
5099 2007-07-01 2007-09-01  
5061 2007-05-23 2007-07-01  
5060 2007-03-21 2007-03-21 export to doc file  EN
5020 2007-01-12 2007-03-16  
4099 2006-02-24 2006-08-31  
4020 2005-03-11 2005-08-12  

Implementation Dates

date of Ratification (DOR) (1) 2007-07-01
date of Availability (DAV) (2) 2007-07-27
date of Announcement (DOA) (3) 2007-10-01
date of Publication (DOP) (4) 2008-04-01
date of Withdrawal (DOW) (5) 2010-07-01


Supersedes EN 61788-4:2001
Superseded by EN 61788-4:2011
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.