SIST EN 61788-21:2015

SLOVENSKI STANDARD
SIST EN 61788-21:2015
01-september-2015
6XSHUSUHYRGQRVWGHO6XSHUSUHYRGQHåLFH0HWRGHSUHVNXãDQMDVSORãQLK
NDUDNWHULVWLNSUDNWLþQLKVXSHUSUHYRGQLKåLFLQQDYRGLOD
Superconductivity - Part 21: Superconducting wires - Test Methods for Practical
Superconducting Wires General Characteristics and Guidance
Supraleitfähigkeit - Teil 21: Supraleiterdrähte - Prüfverfahren für technische
Supraleiterdrähte - Allgemeine Eigenschaften und Anleitung
Supraconductivité - Partie 21: Fils supraconducteurs - Méthodes d'essai pour fils
supraconducteurs à usage pratique - Caractéristiques générales et lignes directrices
Ta slovenski standard je istoveten z: EN 61788-21:2015
ICS:
29.050 Superprevodnost in prevodni Superconductivity and
materiali conducting materials
29.060.10 Žice Wires
SIST EN 61788-21:2015 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN 61788-21:2015

---------------------- Page: 2 ----------------------

SIST EN 61788-21:2015


EUROPEAN STANDARD EN 61788-21

NORME EUROPÉENNE

EUROPÄISCHE NORM
July 2015
ICS 17.220; 29.050; 77.040.10

English Version
Superconductivity - Part 21: Superconducting wires - Test
methods for practical superconducting wires - General
characteristics and guidance
(IEC 61788-21:2015)
Supraconductivité - Partie 21: Fils supraconducteurs - Supraleitfähigkeit - Teil 21: Supraleiterdrähte -
Méthodes d'essai pour fils supraconducteurs à usage Prüfverfahren für technische Supraleiterdrähte - Allgemeine
pratique - Caractéristiques générales et lignes directrices Eigenschaften und Anleitung
(IEC 61788-21:2015) (IEC 61788-21:2015)
This European Standard was approved by CENELEC on 2015-06-23. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.


European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN 61788-21:2015 E

---------------------- Page: 3 ----------------------

SIST EN 61788-21:2015
EN 61788-21:2015
European foreword
The text of document 90/353/FDIS, future edition 1 of IEC 61788-21, prepared by IEC/TC 90
"Superconductivity" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
EN 61788-21:2015.
The following dates are fixed:
(dop) 2016-03-23
• latest date by which the document has to be implemented at
national level by publication of an identical national
standard or by endorsement
(dow) 2018-06-23
• latest date by which the national standards conflicting with
the document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 61788-21:2015 was approved by CENELEC as a European
Standard without any modification.
2

---------------------- Page: 4 ----------------------

SIST EN 61788-21:2015
EN 61788-21:2015
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is
available here: www.cenelec.eu.

Publication Year Title EN/HD Year
IEC 60050 series International electrotechnical vocabulary - -
IEC 61788-1 -  Superconductivity - EN 61788-1 -
Part 1: Critical current measurement - DC
critical current of Nb-Ti composite
superconductors
IEC 61788-2 -  Superconductivity - EN 61788-2 -
Part 2: Critical current measurement - DC
critical current of Nb Sn composite
3
superconductors
IEC 61788-3 -  Superconductivity - EN 61788-3 -
Part 3: Critical current measurement - DC
critical current of Ag- and/or Ag alloy-
sheathed Bi-2212 and Bi-2223 oxide
superconductors
IEC 61788-4 -  Superconductivity - EN 61788-4 -
Part 4: Residual resistance ratio
measurement - Residual resistance ratio of
Nb-Ti composite superconductors
IEC 61788-5 -  Superconductivity - EN 61788-5 -
Part 5: Matrix to superconductor volume
ratio measurement - Copper to
superconductor volume ratio of Cu/Nb-Ti
composite superconducting wires
IEC 61788-6 -  Superconductivity - EN 61788-6 -
Part 6: Mechanical properties
measurement - Room temperature tensile
test of Cu/Nb-Ti composite
superconductors
3

---------------------- Page: 5 ----------------------

SIST EN 61788-21:2015
EN 61788-21:2015
Publication Year Title EN/HD Year
IEC 61788-8 -  Superconductivity - EN 61788-8 -
Part 8: AC loss measurements - Total AC
loss measurement of round
superconducting wires exposed to a
transverse alternating magnetic field at
liquid helium temperature by a pickup coil
method
IEC 61788-10 -  Superconductivity - EN 61788-10 -
Part 10: Critical temperature
measurement - Critical temperature of
composite superconductors by a resistance
method
IEC 61788-11 -  Superconductivity - EN 61788-11 -
Part 11: Residual resistance ratio
measurement - Residual resistance ratio of
Nb Sn composite superconductors
3
IEC 61788-12 -  Superconductivity - EN 61788-12 -
Part 12: Matrix to superconductor volume
ratio measurement - Copper to non-copper
volume ratio of Nb Sn composite
3
superconducting wires
IEC 61788-13 -  Superconductivity - EN 61788-13 -
Part 13: AC loss measurements -
Magnetometer methods for hysteresis loss
in superconducting multifilamentary
composites
IEC 61788-18 -  Superconductivity - EN 61788-18 -
Part 18: Mechanical properties
measurement - Room temperature tensile
test of Ag- and/or Ag alloy-sheathed
Bi-2223 and Bi-2212 composite
superconductors
IEC 61788-19 -  Superconductivity - EN 61788-19 -
Part 19: Mechanical properties
measurement - Room temperature tensile
test of reacted Nb Sn composite
3
superconductors

4

---------------------- Page: 6 ----------------------

SIST EN 61788-21:2015



IEC 61788-21

®


Edition 1.0 2015-05




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Superconductivity –

Part 21: Superconducting wires – Test methods for practical superconducting

wires – General characteristics and guidance




Supraconductivité –

Partie 21: Fils supraconducteurs – Méthodes d’essai pour fils supraconducteurs


à usage pratique – Caractéristiques générales et lignes directrices














INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 17.220; 29.050; 77.040.10 ISBN 978-2-8322-2691-9



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

---------------------- Page: 7 ----------------------

SIST EN 61788-21:2015
– 2 – IEC 61788-21:2015 © IEC 2015
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Characteristic attributes of practical SC wires . 7
5 Categories of properties . 7
6 Properties governed by IEC standards . 7
6.1 General . 7
6.2 Properties referring to the operation of SC wires . 7
6.3 Properties related to implementation and engineering . 8
Annex A (informative) Characteristic attributes of practical SC wires . 9
A.1 General . 9
A.2 Critical temperature . 9
A.3 Critical magnetic and irreversibility fields . 9
A.4 Critical current and n-value . 10
A.5 Stability. 10
A.6 AC loss . 10
A.7 Strain-dependent superconducting properties . 10
A.8 Mechanical properties . 11
A.9 Uniformity of properties . 11
Bibliography . 12

---------------------- Page: 8 ----------------------

SIST EN 61788-21:2015
IEC 61788-21:2015 © IEC 2015 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

SUPERCONDUCTIVITY –

Part 21: Superconducting wires –
Test methods for practical superconducting wires –
General characteristics and guidance

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in
addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses
arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61788-21 has been prepared by IEC technical committee 90:
Superconductivity.
The text of this standard is based on the following documents:
FDIS Report on voting
90/353/FDIS 90/354/RVD

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all the parts in the IEC 61788 series, published under the general title
Superconductivity, can be found on the IEC website.

---------------------- Page: 9 ----------------------

SIST EN 61788-21:2015
– 4 – IEC 61788-21:2015 © IEC 2015
The committee has decided that the contents of this publication will remain unchanged until the
stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to
the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

---------------------- Page: 10 ----------------------

SIST EN 61788-21:2015
IEC 61788-21:2015 © IEC 2015 – 5 –
INTRODUCTION
Superconducting (SC) wires are a central and often enabling technology of many important
industrial products. Consensus-based standards for SC wires greatly facilitate the creation of
procurement specifications, design and engineering of components, certification of quality,
description of operating devices, and generalization of use in industrial technologies.
This part of IEC 61788 is ranked as a first priority for both producers and users of
superconducting technology: It provides the measurement methods and test procedures for
properties critical to use. Adherence to normative information assists the development of
commercial markets and the distribution of products. Standardization in this regard is meant to
provide common access to, and unarguable reference information about, characteristics that are
most important for superconductor-based technologies.
This part of IEC 61788 includes the measurement principles and measurement techniques
together with the relevant terminology and definitions. Specifications of SC wire products take
into account the function of the different components of SC wires to meet operational needs,
maintain operational (superconducting) conditions, and accommodate mechanical forces a
...