IEC 60216-3:2006

Electrical insulating materials - Thermal endurance properties - Part 3: Instructions for calculating thermal endurance characteristics

IEC 60216-3:2006 specifies the calculation procedures to be used for deriving thermal endurance characteristics from experimental data obtained in accordance with the instructions of IEC 60216-1 and IEC 60216-2, using fixed ageing temperatures and variable ageing times. The experimental data may be obtained using non-destructive, destructive or proof tests. Data obtained from non-destructive or proof tests may be incomplete, in that measurement of times taken to reach the endpoint may have been terminated at some point after the median time but before all specimens have reached end-point. The procedures are illustrated by worked examples, and suitable computer programs are recommended to facilitate the calculations. The major technical changes with regard to the first edition concern an updating of Table C.2. In addition, the scope has been extended to cover a greater range of data characteristics, particularly with regard to incomplete data, as often obtained from proof test criteria. The greater flexibility of use should lead to more efficient employment of the time available for ageing purposes. Finally, the procedures specified in this part of IEC 60216 have been extensively tested and have been used to calculate results from a large body of experimental data obtained in accordance with other parts of the standard. Annex E "Computer program" has been completely reworked.
Please be aware that the computer program provided in this publication is not compatible with the 64-bit version of Windows 7.

Matériaux isolants électriques - Propriétés d'endurance thermique - Partie 3: Instructions pour le calcul des caractéristiques d'endurance thermique

La CEI 60216-3:2006 spécifie les méthodes de calcul à utiliser pour obtenir les caractéristiques d'endurance thermique à partir des données expérimentales obtenues conformément aux instructions de la CEI 60216-1 et de la CEI 60216-2, en utilisant des températures de vieillissement fixes et des temps de vieillissement variables. Les données expérimentales peuvent être obtenues en utilisant des essais non destructifs, des essais destructifs et des essais d'épreuve. Les données obtenues à partir d'essais non destructifs ou d'essais d'épreuve peuvent être incomplètes, car la mesure des temps mis pour atteindre le point limite peut avoir été arrêtée à un moment situé après le temps médian, mais avant que toutes les éprouvettes n'aient atteint le point limite. Les méthodes sont illustrées par des exemples pratiques, et des programmes informatiques adaptés sont recommandés pour faciliter les calculs. Les modifications majeures par rapport à la première édition concernent la mise à jour du Tableau C.2. De plus, le domaine d'application a été élargi pour couvrir une plus grande gamme de caractéristiques de données, en particulier en ce qui concerne les données incomplètes, comme cela est souvent le cas pour les données obtenues à partir de critères d'essai d'épreuve. Il convient que cette plus grande souplesse d'utilisation conduise à un emploi plus efficace du temps disponible pour les essais de vieillissement. Enfin, les méthodes spécifiées dans cette partie de la CEI 60216 ont été largement soumises aux essais et ont été utilisées pour calculer les résultats à partir d'un grand nombre de données expérimentales obtenues conformément aux autres parties de la norme. L'Annexe E "Programme informatique" a été complètement remaniée.
Veuillez noter que le programe informatique fourni dans cette publication n'est pas compatible avec la version 64 bits de Windows 7.

General Information

• Status: Published
• Publication Date: 25-Apr-2006
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 17.220.99 - Other standards related to electricity and magnetism
• ICS: 19.020 - Test conditions and procedures in general
• Technical Committee: TC 112 - Evaluation and qualification of electrical insulating materials and systems
• Drafting Committee: WG 1 - TC 112/WG 1
• Current Stage: DELPUB - Deleted Publication
• Start Date: 28-Sep-2018
• Completion Date: 16-Mar-2021

Relations

• Corrected By: IEC 60216-3:2006/COR1:2009 - Corrigendum 1 - Electrical insulating materials - Thermal endurance properties - Part 3: Instructions for calculating thermal endurance characteristics
• Effective Date: 05-Sep-2023
• Revises: IEC 60216-3:2002 - Electrical insulating materials - Thermal endurance properties - Part 3: Instructions for calculating thermal endurance characteristics
• Effective Date: 05-Sep-2023
• Revised: IEC 60216-3:2021 - Electrical insulating materials - Thermal endurance properties - Part 3: Instructions for calculating thermal endurance characteristics
• Effective Date: 05-Sep-2023
• Revises: IEC 60216-3:2002/COR1:2002 - Corrigendum 1 - Electrical insulating materials - Thermal endurance properties - Part 3: Instructions for calculating thermal endurance characteristics
• Effective Date: 05-Sep-2023

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD 60216-3
Second edition
2006-04
Electrical insulating materials –
Thermal endurance properties –

Part 3:
Instructions for calculating thermal
endurance characteristics
Reference number
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INTERNATIONAL IEC
STANDARD 60216-3
Second edition
2006-04
Electrical insulating materials –
Thermal endurance properties –

Part 3:
Instructions for calculating thermal
endurance characteristics
 IEC 2006  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale X
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue

– 2 – 60216-3  IEC:2006(E)
CONTENTS
FOREWORD.4

1 Scope.6

2 Normative references .6

3 Terms, definitions, symbols and abbreviated terms.6

4 Principles of calculations .10

4.1 General principles .10

4.2 Preliminary calculations.10
4.3 Variance calculations .11
4.4 Statistical tests.12
4.5 Results.12
5 Requirements and recommendations for valid calculations .13
5.1 Requirements for experimental data .13
5.2 Precision of calculations.13
6 Calculation procedures.13
6.1 Preliminary calculations.13
6.2 Main calculations.17
6.3 Statistical tests.19
6.4 Thermal endurance graph .21
7 Calculation and requirements for results.21
7.1 Calculation of thermal endurance characteristics.21
7.2 Summary of statistical tests and reporting .22
7.3 Reporting of results .22
8 Test report.22

Annex A (normative)  Decision flow chart.24
Annex B (normative)  Decision table .25
Annex C (informative)  Statistical tables.26
Annex D (informative)  Worked examples .35
Annex E (informative)  Computer program .42

Bibliography.50

Figure D.1 – Thermal endurance graph.39
Figure D.2 – Example 3: Property-time graph (destructive test data).41

Table B.1 – Decisions and actions according to tests.25
Table C.1 – Coefficients for censored data calculations .26
Table C.2 – Fractiles of the F-distribution, F(0,95 ,f ,f ).32
n d
Table C.3 – Fractiles of the F-distribution, F(0,995 ,f ,f ) .33
n d
Table C.4 –Fractiles of the t-distribution, t .34
0,95
Table C.5 – Fractiles of the χ -distribution.34

60216-3  IEC:2006(E) – 3 –
Table D.1 – Worked example 1 – Censored data (proof tests).35

Table D.2 – Worked example 2 – Complete data (non-destructive tests) .37

Table D.3 – Worked example 3 – Destructive tests .40

Table E.1 – Non-destructive test data .43

Table E.2 – Destructive test data .44

– 4 – 60216-3  IEC:2006(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
ELECTRICAL INSULATING MATERIALS –

THERMAL ENDURANCE PROPERTIES –

Part 3: Instructions for calculating thermal

endurance characteristics
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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International Standard IEC 60216-3 has been prepared by IEC technical committee 112:

Evaluation and qualification of electrical insulating materials and systems .
This second edition of IEC 60216-3 cancels and replaces the first edition, published in 2002,
and constitutes a technical revision.
The major technical changes with regard to the first edition concern an updating of Table C.2.
In addition, the scope has been extended to cover a greater range of data characteristics,
particularly with regard to incomplete data, as often obtained from proof test criteria. The
greater flexibility of use should lead to more efficient employment of the time available for
ageing purposes. Finally, the procedures specified in this part of IEC 60216 have been
extensively tested and have been used to calculate results from a large body of experimental
data obtained in accordance with other parts of the standard. Annex E “Computer program”
has been completely reworked.
—————————
Provisional title: IEC technical committee 112 has been formed out of a merger between subcommittee 15E and
technical committee 98.
60216-3 © IEC:2006(E) – 5 –
The text of this standard is based on the following documents:

FDIS Report on voting
112/26/FDIS 112/29/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.

IEC 60216 consists of the following parts, under the general title Electrical insulating
materials – Thermal endurance properties :
Part 1: Ageing procedures and evaluation of test results
Part 2: Determination of thermal endurance properties of electrical insulating materials –
Choice of test criteria
Part 3: Instructions for calculating thermal endurance characteristics
Part 4: Ageing ovens
Part 5: Determination of relative thermal endurance index (RTE) of an insulating material
Part 6: Determination of thermal endurance indices (TI and RTE) of an insulating material
using the fixed time frame method
NOTE This series may be extended. For revisions and new parts, see the current catalogue of IEC publications
for an up-to-date list.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result 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.
A CD-ROM containing the computer program and data files referred to in Annex E is affixed to
the back cover of this publication.
A bilingual version of this publication may be issued at a later date.
The contents of the corrigendum of December 2009 have been included in this copy.

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Titles of existing parts in this series will be updated at
...