Publication details
| Publication CODE |
Title |
| NBN EN IEC 61788-4:2020 (2020-05) |
SUPERCONDUCTIVITY - PART 4: RESIDUAL RESISTANCE RATIO MEASUREMENT - RESIDUAL RESISTANCE RATIO OF NB-TI AND NB3SN COMPOSITE SUPERCONDUCTORS |
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| Price Excl. VAT |
Total number of pages, tables and drawings |
|
25.00 €
|
3. |
Description
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.
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| Class |
C
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Available files
ATTENTION: Belgian registered standards (NBN EN or NBN HD) are generally
only available in English or French. Only the cover page is translated
and the document itself is in English or in French.
Very important notice: 98% of the text of the NBN EN 55XXX,
NBN EN 6XXXX comes from the IEC text which is NOT included.
This text can be ordered electronically on our website, but isn't available
via this link. Please contact the BEC if you want to buy this text and we'll
give you the appropriate link.
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DE version
|
EN version
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FR version
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Status
| Status |
Registered trilingual Belgian standard EN or FR or DE |
| Situation |
Currently active
Replaces
NBN EN 61788-4:2016
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|
Origin
| Committee |
CLC/SR 90
Superconductivity
|
Approval
| BEC Approval |
2020-04-24 |
| NBN Approval |
2020-06-25 |
| ICS-Code (International Standards Classification) |
17.220.20
, 29.050
|
| NBN Status |
New |
|
| Date of ratification (d.o.r.) |
2020-04-24 |
| Date of availability (d.a.v.) |
2020-05-15 |
| Date of announcement (d.o.a.) |
2020-07-24 |
| Date of publication (d.o.p.) |
2021-01-24 |
| Date of withdrawal former edition (d.o.w.) |
2023-04-24 |
|
Correspondences with international standards
| Relation |
International standard |
Date |
| is identical to |
EN IEC 61788-4:2020
|
2020-05-15 |
| is identical to |
IEC 61788-4:201X
|
|
Relations to belgian/foreign publications
| Type |
Origin |
Code |
Date |
| Standard |
Foreign |
IEC 60050-815 |
|
|
