prEN IEC 61788-27:2023

SLOVENSKI STANDARD
oSIST prEN IEC 61788-27:2024
01-februar-2024
Merjenje naklona praktičnih superprevodnih žic - Metoda merjenja naklona
kompozitnih superprevodnikov NbTi in Nb3Sn
Twist pitch measurement of practical superconducting wires - Twist pitch measurement
method of NbTi and Nb3Sn composite superconductors
Ta slovenski standard je istoveten z: prEN IEC 61788-27:2023
ICS:
17.220.20 Merjenje električnih in Measurement of electrical
magnetnih veličin and magnetic quantities
29.050 Superprevodnost in prevodni Superconductivity and
materiali conducting materials
oSIST prEN IEC 61788-27:2024 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN IEC 61788-27:2024

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oSIST prEN IEC 61788-27:2024

90/507/CDV

COMMITTEE DRAFT FOR VOTE (CDV)

PROJECT NUMBER:
IEC 61788-27 ED1

DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2023-10-20 2024-01-12

SUPERSEDES DOCUMENTS:
90/498/CD, 90/502/CC

IEC TC 90 : SUPERCONDUCTIVITY
SECRETARIAT: SECRETARY:
Japan Mr Jun Fujikami
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:


Other TC/SCs are requested to indicate their interest, if any, in
this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for
Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.

This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries” clau ses
to be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for submitting ISC
clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Twist pitch measurement of practical superconducting wires - Twist pitch measurement method of NbTi
and Nb3Sn composite superconductors

PROPOSED STABILITY DATE: 2031

NOTE FROM TC/SC OFFICERS:

Copyright © 2023 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without

permission in writing from IEC.

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oSIST prEN IEC 61788-27:2024
IEC CDV 61788-27 © IEC:2023 – 2 – 90/507/CDV


1 CONTENTS


2 FOREWORD . 4
3 INTRODUCTION . 6
4 1 Scope . 7
5 2 Normative references . 7
6 3 Terms and definitions . 7
7 4 Principle . 8
8 5 Reagents and auxiliary materials . 8
9 6 Apparatus and tools . 9
10 7 Specimen preparation . 9
11 7.1 Requirements . 9
12 7.2 Cleaning . 9
13 7.3 Drying . 9
14 7.4 Removing matrix copper and sanding barrier (apply to Nb-Sn/Cu specimen
15 of external stabilizer type only) . 9
16 8 Mea
...