EN 60172:2015

SLOVENSKI STANDARD
01-september-2015
1DGRPHãþD
SIST EN 60172:2001
SIST EN 60172:2001/A1:2001
SIST EN 60172:2001/A2:2010
Preskusni postopek za ugotavljanje temperaturnega indeksa emajlirane in s
trakom ovite žice za navitja
Test procedure for the determination of the temperature index of enamelled and tape
wrapped winding wires
Prüfverfahren zur Bestimmung des Temperaturindex von Lackdrähten und
bandumwickelten Drähten
Méthode d’essai pour la détermination de l’indice de température des fils de bobinage
émaillés et enveloppés de ruban
Ta slovenski standard je istoveten z: EN 60172:2015
ICS:
17.200.01 Termodinamika na splošno Thermodynamics in general
29.060.10 Žice Wires
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 60172
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2015
ICS 29.060.10 Supersedes EN 60172:1994
English Version
Test procedure for the determination of the temperature index of
enamelled and tape wrapped winding wires
(IEC 60172:2015)
Méthode d'essai pour la détermination de l'indice de Prüfverfahren zur Bestimmung des Temperaturindex von
température des fils de bobinage émaillés et enveloppés de Lackdrähten und bandumwickelten Drähten
ruban (IEC 60172:2015)
(IEC 60172:2015)
This European Standard was approved by CENELEC on 2015-06-16. 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 60172:2015 E
European foreword
The text of document 55/1518/FDIS, future edition 4 of IEC 60172, prepared by IEC/TC 55 "Winding
wires" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
(dop) 2016-03-16
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2018-06-16
standards conflicting with the
document have to be withdrawn
This document supersedes EN 60172:1994.

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 60172:2015 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:

IEC 60317 (series) NOTE Harmonized as EN 60317 (series).
IEC 60455-3-5 NOTE Harmonized as EN 60455-3-5.
IEC 60464-3-2 NOTE Harmonized as EN 60464-3-2.

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 60216-1 -  Electrical insulating materials - Thermal EN 60216-1 -
endurance properties -- Part 1: Ageing
procedures and evaluation of test results
IEC 60216-3 -  Electrical insulating materials - Thermal EN 60216-3 -
endurance properties -- Part 3: Instructions
for calculating thermal endurance
characteristics
IEC 60172 ®
Edition 4.0 2015-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Test procedure for the determination of the temperature index of enamelled and

tape wrapped winding wires
Méthode d’essai pour la détermination de l’indice de température des fils de

bobinage émaillés et enveloppés de ruban

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.060.10 ISBN 978-2-8322-2676-6

– 2 – IEC 60172:2015 © IEC 2015
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Summary of procedure . 7
5 Test specimens . 7
5.1 Preparation . 7
5.1.1 Enamelled round wire with a nominal conductor diameter of 0,224 mm
up to and including 2,65 mm . 7
5.1.2 Tape wrapped round wire and enamelled or tape wrapped rectangular
wire . 10
5.2 Varnish impregnation . 12
5.3 Notes on number of test specimens . 13
5.4 Specimen holder . 13
5.4.1 For specimens according to 5.1.1 . 13
5.4.2 For specimens according to 5.1.2 . 14
6 Temperature exposure. 14
7 Test voltage and its application . 16
8 Calculations . 16
8.1 Specimen failure time . 16
8.2 Time to failure . 17
8.3 Linearity of data . 17
8.4 Calculating and plotting thermal endurance and temperature index . 17
9 Report . 18
Annex A (normative) Method for calculation of the regression line . 19
Annex B (normative) Correlation coefficient . 24
Bibliography . 26

Figure 1 – Device used to form enamelled round wire test specimen . 8
Figure 2 – Spacer . 8
Figure 3 – Twist forming jig . 9
Figure 4 – Test specimen set up in forming jig . 9
Figure 5 – Test specimen formed with loop cut . 10
Figure 6 – Jig for bending large magnet wire, dielectric test specimen . 11
Figure 7 – Forming jig and test specimen . 12
Figure 8 – Specimen holder . 13
Figure 9 – Specimen holder and electrical connection fixture . 14
Figure 10 – Thermal endurance graph – Temperature index . 18
Figure A.1 – Plot of regression line based on sample calculation (Table A.2) . 23

Table 1 – Force and number of twists for specimens . 8
Table 2 – Proof voltage for round enamelled wire . 10
Table 3 – Recommended exposure times in days per cycle. 15

IEC 60172:2015 © IEC 2015 – 3 –
Table 4 – Proof voltage for tape-wrapped round and for enamelled or tape-wrapped
rectangular wire . 16
Table A.1 – Commonly used test temperatures in degrees Celsius and the
corresponding kelvins with its reciprocal and reciprocal squared values . 21
Table A.2 – Sample calculation . 22

– 4 – IEC 60172:2015 © IEC 2015
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TEST PROCEDURE FOR THE DETERMINATION OF THE TEMPERATURE
INDEX OF ENAMELLED AND TAPE WRAPPED WINDING WIRES

FOREWORD
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