BS EN IEC 61788-4:2020 - Superconductivity. Residual resistance ratio measurement. Residual resistance ratio of Nb-Ti and Nb3Sn composite superconductors
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BS EN IEC 61788-4:2020

Superconductivity. Residual resistance ratio measurement. Residual resistance ratio of Nb-Ti and Nb3Sn composite superconductors

Status : Current   Published : May 2020

Format
PDF

Format
HARDCOPY



IEC 61788-4:2020 is available as

IEC 61788-4:2020 RLV

which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.



IEC 61788-4:2020 specifies a test method for the determination of the residual resistance ratio (RRR) of Nb-Ti and Nb3Sn composite superconductors with Cu, Cu-Ni, Cu/Cu-Ni and Al matrix in a strain-free condition and zero external magnetic field. This method is intended for use with superconductor specimens that have a monolithic structure with rectangular or round cross-section, RRR value less than 350, and cross-sectional area less than 3 mm2. In the case of Nb3Sn, the specimens have received a reaction heat-treatment. This fifth edition cancels and replaces the fourth edition published in 2016. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) change in the suitable distance of voltage taps on the specimen for reliable measurement, b) new report on the result of the round robin test of the residual resistance ratio of Nb3Sn superconductors that proves the validity of the measurement method in this standard, c) revision of the confusing definitions of the copper ratio and copper fraction.




Standard NumberBS EN IEC 61788-4:2020
TitleSuperconductivity. Residual resistance ratio measurement. Residual resistance ratio of Nb-Ti and Nb3Sn composite superconductors
StatusCurrent
Publication Date20 May 2020
Normative References(Required to achieve compliance to this standard)IEC 60050-815
Informative References(Provided for Information)No other standards are informatively referenced
ReplacesBS EN 61788-4:2016
International RelationshipsEN IEC 61788-4:2020,IEC 61788-4:2020
Draft Superseded By18/30382796 DC
DescriptorsSuperconductivity, Resistance measurement, Electric wires, Niobium, Electrical conductivity, Electric conductors, Superconductors, Statistical methods of analysis, Titanium, Electric current
ICS17.200.20
17.220.20
29.050
Title in FrenchSupraconductivité Mesurage du rapport de résistance résiduelle. Rapport de résistance résiduelle des composites supraconducteurs de Nb-Ti et de Nb3Sn
Title in GermanSupraleitfähigkeit Messung des Restwiderstandsverhältnisses. Restwiderstandsverhältnis von Nb-Ti und Nb3Sn Verbundsupraleitern
CommitteeL/-/90
ISBN978 0 539 02237 7
PublisherBSI
FormatA4
DeliveryYes
Pages40
File Size1.575 MB
Price£214.00


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