EN 60216-5:2008

SLOVENSKI STANDARD
01-september-2008
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Electrical insulating materials - Thermal endurance properties -- Part 5: Determination of
relative thermal endurance index (RTE) of an insulating material
Elektroisolierstoffe - Eigenschaften hinsichtlich des thermischen Langzeitverhaltens - Teil
5: Bestimmung des relativen thermischen Lebensdauer-Indexes (RTE) von
Elektroisolierstoffen
Matériaux isolants électriques - Propriétés d'endurance thermique -- Partie 5:
Détermination de l’indice d’endurance thermique relatif (RTE) d’un matériau isolant
Ta slovenski standard je istoveten z: EN 60216-5:2008
ICS:
29.035.01 Izolacijski materiali na Insulating materials in
splošno general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 60216-5
NORME EUROPÉENNE
May 2008
EUROPÄISCHE NORM
ICS 19.020; 29.020; 29.035.01 Supersedes EN 60216-5:2003

English version
Electrical insulating materials -
Thermal endurance properties -
Part 5: Determination of relative thermal endurance index (RTE)
of an insulating material
(IEC 60216-5:2008)
Matériaux isolants électriques -  Elektroisolierstoffe -
Propriétés d'endurance thermique - Eigenschaften hinsichtlich des
Partie 5: Détermination de l’indice thermischen Langzeitverhaltens -
d’endurance thermique relatif (RTE) Teil 5: Bestimmung des relativen
d’un matériau isolant thermischen Lebensdauer-Indexes (RTE)
(CEI 60216-5:2008) von Elektroisolierstoffen
(IEC 60216-5:2008)
This European Standard was approved by CENELEC on 2008-05-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60216-5:2008 E
Foreword
The text of document 112/89/FDIS, future edition 3 of IEC 60216-5, prepared by IEC TC 112, Evaluation
and qualification of electrical insulating materials and systems, was submitted to the IEC-CENELEC
parallel vote and was approved by CENELEC as EN 60216-5 on 2008-05-01.
This European Standard supersedes EN 60216-5:2003.
selection of the reference (or reference EIM). EN 60216-5:2008 provides instructions for deriving a
provisional estimate of the temperature up to which a material may give satisfactory performance in an
application (by comparative thermal ageing with a material of known performance).
This standard is to be used in conjunction with EN 60216-1, EN 60216-2 and EN 60216-3.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2009-02-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2011-05-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60216-5:2008 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 60085 NOTE  Harmonized as EN 60085:2008 (not modified).
__________
- 3 - EN 60216-5:2008
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

IEC 60216-1 2001 Electrical insulating materials - Properties of EN 60216-1 2001
thermal endurance -
Part 1: Ageing procedures and evaluation of
test results
1) 2)
IEC 60216-2 - Electrical insulating materials - Thermal EN 60216-2 2005
endurance properties -
Part 2: Determination of thermal endurance
properties of electrical insulating materials -
Choice of test criteria
IEC 60216-3 2006 Electrical insulating materials - Thermal EN 60216-3 2006
endurance properties -
Part 3: Instructions for calculating thermal
endurance characteristics
1)
Undated reference.
2)
Valid edition at date of issue.

IEC 60216-5
Edition 3.0 2008-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical insulating materials – Thermal endurance properties –
Part 5: Determination of relative thermal endurance index (RTE) of an insulating
material
Matériaux isolants électriques – Propriétés d'endurance thermique –
Partie 5: Détermination de l’indice d’endurance thermique relatif (RTE) d’un
matériau isolant
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
T
CODE PRIX
ICS 19.020; 29.020; 29.035.01 ISBN 2-8318-9655-X

– 2 – 60216-5 © IEC:2008
CONTENTS
FOREWORD.03
1 Scope.1H1H5
2 Normative references .2H2H5
3 Terms, definitions, symbols, units and abbreviations .3H3H5
3.1 Terms, abbreviations, and definitions .4H4H6
3.2 Symbols and units .5H5H7
3.3 Objectives of RTE determination .6H6H8
4 Experimental procedures .7H7H8
4.1 Selection of reference EIM .8H8H8
4.2 Selection of diagnostic test for extent of ageing.9H9H9
4.3 Ageing procedures .10H10H9
5 Calculation procedures.11H11H10
5.1 Thermal endurance data – Calculation of intermediate parameters.12H12H10
5.2 Calculation of RTE .13H13H11
5.3 Statistical and numerical tests .14H14H11
5.3.1 Tests of IEC 60216-3.15H15H11
5.3.2 Precision of correlation time .16H16H12
5.3.3 Lower confidence interval of RTE .17H17H12
5.3.4 Extrapolation .18H18H13
6 Report .19H19H13
6.1 Results of statistical and numerical tests .20H20H13
6.2 Results.21H21H13
6.3 Report .22H22H13
7 Material testing by short-term thermal ageing .23H23H13
8 Insulation classification .24H24H14
Annex A (informative) Repeatability of correlation time .25H25H15
Annex B (informative) Thermal class assignment .26H26H18
Annex C (informative) Computer program .27H27H20
Annex D (informative) Selection of the reference EIM .28H28H21
Bibliography.29H29H23

Figure 1 – Thermal endurance graphs.30H30H9
Figure 2 – Unacceptable thermal endurance graphs .31H31H10

Table 1 – Input parameters for the calculations concerning RTE.32H32H11
Table B.1 – Thermal class equivalents for insulating material .33H33H18
Table B.2 – F– function; p = 0,05 .34H34H19
Table B.3 – t–function.35H35H19

60216-5 © IEC:2008 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL INSULATING MATERIALS –
THERMAL ENDURANCE PROPERTIES –

Part 5: Determination of relative thermal endurance
index (RTE) of an insulating material

FOREWORD
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