Electrical insulating materials - Determination of the effects of ionizing radiation - Part 5: Procedures for assessment of ageing in service

IEC 60544-5:2011 covers ageing assessment methods which can be applied to components based on polymeric materials (e.g. cable insulation and jackets, elastomeric seals, polymeric coatings, gaiters) which are used in environments where they are exposed to radiation. The object of this standard is aimed at providing methods for the assessment of ageing in service. The approaches discussed in the following clauses cover ageing assessment programmes based on condition monitoring (CM), the use of sample deposits in severe environments and sampling of real-time aged components. This second edition cancels and replaces the first edition, published in 2003, and constitutes an editorial revision to align it with standards recently developed by SC 45A as well as with other parts in the IEC 60544 series.

Elektroisolierstoffe - Bestimmung der Wirkung ionisierender Strahlung - Teil 5: Bewertungsverfahren für die Alterung während des Einsatzes

Matériaux isolants - Détermination des effets des rayonnements ionisants - Partie 5: Procédures pour l'estimation du vieillissement en service

La CEI 60544-5:2011 couvre les méthodes d'évaluation du vieillissement pouvant être appliquées aux composants à base de matériaux polymères (par exemple, des gaines et isolations de câble, des joints en élastomère, des revêtements polymères, des gaines) qui sont utilisés dans des environnements où ils sont exposés aux rayonnements. L'objet de la présente norme est destiné à fournir des méthodes d'évaluation du vieillissement en service. Les approches examinées dans les articles qui suivent couvrent les programmes d'évaluation de vieillissement fondés sur le contrôle des conditions (CM), l'utilisation de dépôt d'échantillons dans des environnements sévères et l'échantillonnage de composants vieillis en temps réel. Cette deuxième édition annule et remplace la première édition, publiée en 2003, dont elle constitue une éditoriale révisée destinée à aligner ce document avec des normes récemment élaborées au sein du SC 45A, ainsi qu'avec d'autres parites de la série CEI 60544.

Električni izolacijski materiali - Ugotavljanje učinkov ionizirnega sevanja - 5. del: Postopki za ocenjevanje staranja med uporabo

Ta del standarda IEC 60544 zajema metode za ocenjevanje staranja, ki jih je mogoče uporabiti za dele na osnovi polimernih materialov (npr. izolacija in plašči kablov, elastomerna tesnila, polimerne prevleke, gamaše), ki se uporabljajo v okoljih, kjer so izpostavljeni sevanju. Namen tega standarda je zagotoviti metode za ocenjevanje staranja med uporabo. Pristopi, obravnavani v naslednjih točkah, zajemajo programe za ocenjevanje staranja na podlagi spremljanja stanja (CM), puščanja vzorcev v neugodnih okoljih in vzorčenje delov, staranih v realnem času.

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SIST EN 60544-5:2004
Electrical insulating materials - Determination of the effects of ionising radiation - Part 5:
Procedures for assessment of ageing in service
Elektroisolierstoffe - Bestimmung der Wirkung ionisierender Strahlung - Teil 5 :
Bewertungsverfahren für die Alterung während des Einsatzes
Matériaux isolants - Détermination des effets des rayonnements ionisants - Partie 5:
Procédures pour l'estimation du vieillissement en service
Ta slovenski standard je istoveten z: EN 60544-5:2012
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.

EN 60544-5
April 2012
ICS 17.240; 29.035.01 Supersedes EN 60544-5:2003

English version
Electrical insulating materials -
Determination of the effects of ionizing radiation -
Part 5: Procedures for assessment of ageing in service
(IEC 60544-5:2011)
Matériaux isolants -  Elektroisolierstoffe -
Détermination des effets des Bestimmung der Wirkung ionisierender
rayonnements ionisants - Strahlung -
Partie 5: Procédures pour l'estimation du Teil 5: Bewertungsverfahren für die
vieillissement en service Alterung während des Einsatzes
(CEI 60544-5:2011) (IEC 60544-5:2011)

This European Standard was approved by CENELEC on 2012-01-18. 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, 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

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60544-5:2012 E
The text of document 112/171/CDV, future edition 2 of IEC 60544-5, prepared by IEC TC 112,
"Evaluation and qualification of electrical insulating materials and systems", was submitted to the
IEC-CENELEC parallel vote and approved by CENELEC as EN 60544-5:2012.

The following dates are fixed:
(dop) 2012-10-18
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2015-01-18
• latest date by which the national
standards conflicting with the
document have to be withdrawn
This document supersedes EN 60544-5:2003.
as well as with other parts in the EN 60544 series.

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
Endorsement notice
The text of the International Standard IEC 60544-5:2011 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 60544-4 NOTE  Harmonized as EN 60544-4.

- 3 - EN 60544-5:2012
Annex ZA
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  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
Publication Year Title EN/HD Year

IEC 60544-1 - Electrical insulating materials - Determination EN 60544-1 -
of the effects of ionizing radiation -
Part 1: Radiation interaction and dosimetry

IEC 60544-2 - Guide for determining the effects of ionizing - -
radiation on insulating materials -
Part 2: Procedures for irradiation and test

IEC 60780 - Nuclear power plants - Electrical equipment of - -
the safety system - Qualification

IEC/TR 61244-1 - Determination of long-term radiation ageing in - -
polymers -
Part 1: Techniques for monitoring diffusion-
limited oxidation
IEC/TR 61244-2 - Determination of long-term radiation ageing in - -
polymers -
Part 2: Procedures for predicting ageing at low
dose rates
IEC 60544-5 ®
Edition 2.0 2011-12
Electrical insulating materials – Determination of the effects of ionizing
radiation –
Part 5: Procedures for assessment of ageing in service

Matériaux isolants électriques – Détermination des effets des rayonnements
ionisants –
Partie 5: Procédures pour l'estimation du vieillissement en service

ICS 17.240; 29.035.01 ISBN 978-2-88912-836-5

– 2 – 60544-5  IEC:2011
1 Scope and object . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Background . 7
4.1 General . 7
4.2 Diffusion limited oxidation (DLO) . 7
4.3 Dose rate effects (DRE) . 8
4.4 Accelerated radiation ageing . 8
4.5 Accelerated thermal ageing . 9
5 Approaches to ageing assessment . 9
6 Identifying components of concern . 9
6.1 General . 9
6.2 Priorities for ageing management . 9
6.3 Environmental monitoring . 10
6.4 Localized severe environments . 10
6.5 Worst case components . 10
7 Condition monitoring techniques . 10
7.1 General . 10
7.2 Establishing correlation curves for CM methods . 11
7.3 CM methods . 11
7.4 Using CM for short-term troubleshooting . 11
7.5 Using CM for long-term degradation assessment . 13
8 Predictive modelling . 14
9 Sample deposit . 15
9.1 General . 15
9.2 Requirements of a deposit . 15
9.3 Pre-ageing samples for a deposit . 15
9.4 Installation of an sample deposit . 15
9.5 Testing of samples from the deposit . 16
9.6 Determination of sampling intervals . 16
9.7 Real time aged materials . 17
Annex A (informative) Example of a CM correlation curve . 18
Annex B (informative) Use of a deposit . 19
Bibliography . 20

Figure 1 – Development of ageing data on changes in tensile elongation and a
condition indicator (e.g. indenter modulus) – Schematic. 12
Figure 2 – Correlation curve derived from data in Figure 1 – Schematic . 13
Figure 3 – Estimation of elongation from a correlation curve . 14
Figure 4 – Modification of sampling interval dependent on values of the CM indicator . 17
Figure A.1 – Correlation curve for indenter modulus against tensile elongation for a
CSPE cable jacket material [18] . 18

60544-5  IEC:2011 – 3 –

Part 5: Procedures for assessment of ageing in service

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all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
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consensus of opinion on the relevant subjects since each technical committee has representation from all
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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