Electrical insulating materials - Determination of the effects of ionizing radiation on insulating materials - Part 2: Procedures for irradiation and test

IEC 60544-2:2012 specifies the controls maintained over the exposure conditions during and after the irradiation of insulating materials with ionizing radiation prior to the determination of radiation-induced changes in physical or chemical properties. This standard specifies a number of potentially significant irradiation conditions as well as various parameters which can influence the radiation-induced reactions under these conditions. The objective of this standard is to emphasize the importance of selecting suitable specimens, exposure conditions and test methods for determining the effect of radiation on appropriately chosen properties. Since many materials are used either in air or in inert environments, standard exposure conditions are recommended for both of these situations. It should be noted that this standard does not consider measurements which are performed during the irradiation. This edition includes the following significant technical changes with respect to the previous edition: - alignment with standards recently developed by SC 45A as well as with other parts in the IEC 60544 series.

Elektroisolierstoffe - Bestimmung der Auswirkungen ionisierender Strahlung auf Isolierstoffe - Teil 2: Verfahren zur Bestrahlung und Prüfung

Matériaux isolants électriques - Détermination des effets des rayonnements ionisants sur les matériaux isolants - Partie 2: Méthodes d'irradiation et d'essai

La CEI 60544-2:2012 spécifie d'abord les contrôles exercés sur les conditions d'exposition pendant et après l'irradiation de matériaux isolants par des rayonnements ionisants, avant de déterminer les changements de propriétés physiques ou chimiques induits par rayonnement. Cette norme discute certaines des principales conditions d'irradiation possibles d'une importance significative et spécifie les divers paramètres qui peuvent influer sur les réactions induites par rayonnement dans ces conditions. L'objectif de la présente norme est de démontrer l'importance du choix d'échantillons, de conditions d'exposition et de méthodes d'essai appropriés pour déterminer les effets des rayonnements sur des propriétés convenablement choisies. Comme un grand nombre de matériaux peuvent être utilisés soit dans l'air, soit dans des environnements inertes, des conditions normales d'exposition sont recommandées pour chacune de ces situations. Il convient de noter que cette norme ne prend pas en compte les mesures réalisées pendant l'irradiation. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: - alignement avec des normes récemment élaborées au sein du SC 45A, ainsi qu'avec d'autres parties de la série CEI 60544.

Električni izolacijski materiali - Navodilo za ugotavljanje učinkov ionizirnega sevanja na izolacijske materiale - 2. del: Postopki za obsevanje in preskušanje

Ta del standarda IEC 60544 določa nadzor nad pogoji izpostavljenosti med obsevanjem izolacijskih materialov z ionizirajočim sevanjem in po njem, preden se določijo spremembe, ki so posledica sevanja, v okviru fizikalnih in kemičnih lastnosti. Ta standard določa število potencialno pomembnih pogojev obsevanja in različne parametre, ki lahko vplivajo na reakcije, ki jih povzroči obsevanje, pod temi pogoji. Cilj tega standarda je poudariti pomen izbire ustreznih vzorcev, pogojev izpostavljenosti in preizkusnih metod za določanje učinka obsevanja na ustrezno izbrane lastnosti. Ker se veliko materialov uporablja v zraku ali v inertnih okoljih, so za obe navedeni vrsti okoliščin priporočljivi standardni pogoji izpostavljenosti. V tem standardu niso obravnavane meritve, ki se izvajajo med obsevanjem.

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Electrical insulating materials - Guide for determining of the effects of ionizing radiation
on insulating materials - Part 2: Procedures for irradiation and test
Matériaux isolants électriques - Guide pour la détermination des effets des
rayonnements ionisant sur les matériaux isolants - Partie 2: Méthodes d'irradiation et
Ta slovenski standard je istoveten z: EN 60544-2:2012
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 60544-2
October 2012
ICS 17.240; 29.035.01
English version
Electrical insulating materials -
Determination of the effects of ionizing radiation on insulating materials -
Part 2: Procedures for irradiation and test
(IEC 60544-2:2012)
Matériaux isolants électriques -  Elektroisolierstoffe -
Détermination des effets des Bestimmung der Auswirkungen
rayonnements ionisants ionisierender Strahlung auf Isolierstoffe -
sur les matériaux isolants - Teil 2: Verfahren zur Bestrahlung und
Partie 2: Méthodes d'irradiation et d'essai Prüfung
(CEI 60544-2:2012) (IEC 60544-2:2012)

This European Standard was approved by CENELEC on 2012-08-13. 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

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 60544-2:2012 E
The text of document 112/208/FDIS, future edition 3 of IEC 60544-2, 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 60544-2:2012.
The following dates are fixed:
(dop) 2013-05-13
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2015-08-13
• 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 60544-2:2012 was approved by CENELEC as a European
Standard without any modification.

- 3 - EN 60544-2:2012
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 60093 - Methods of test for volume resistivity and HD 429 S1 -
surface resistivity of solid electrical insulating
IEC 60167 - Methods of test for the determination of the HD 568 S1 -
insulation resistance of solid insulating
IEC 60212 - Standard conditions for use prior to and EN 60212 -
during the testing of solid electrical insulating
IEC 60243-1 - Electrical strength of insulating materials - EN 60243-1 -
Test methods -
Part 1: Tests at power frequencies

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

IEC 60544-4 - Electrical insulating materials - EN 60544-4 -
Determination of the effects of ionizing
radiation -
Part 4: Classification system for service in
radiation environments
ISO 37 - Rubber, vulcanized or thermoplastic - - -
Determination of tensile stress-strain
ISO 48 - Rubber, vulcanized or thermoplastic - - -
Determination of hardness (hardness
between 10 IRHD and 100 IRHD)
ISO 178 - Plastics - Determination of flexural EN ISO 178 -
ISO 179 Series Plastics - Determination of Charpy impact EN ISO 179 Series
ISO 527 Series Plastics - Determination of tensile properties EN ISO 527 Series

ISO 815 Series Rubber, vulcanized or thermoplastic - -
Determination of compression set

ISO 868 - Plastics and ebonite - Determination of EN ISO 868 -
indentation hardness by means of a
durometer (Shore hardness)
IEC 60544-2 ®
Edition 3.0 2012-07
Electrical insulating materials – Determination of the effects of ionizing radiation

on insulating materials –
Part 2: Procedures for irradiation and test

Matériaux isolants électriques – détermination des effets des rayonnements

Ionisants sur les matériaux isolants –

Partie 2: Méthodes d'irradiation et d'essai

ICS 17.240; 29.035.01 ISBN 978-2-83220-223-4

– 2 – 60544-2 © IEC:2012
1 Scope . 8
2 Normative references . 8
3 Irradiation . 9
3.1 Type of radiation and dosimetry . 9
3.2 Irradiation conditions . 10
3.3 Sample preparation . 10
3.4 Irradiation procedures . 10
3.4.1 Irradiation dose-rate control . 10
3.4.2 Irradiation temperature control . 10
3.4.3 Irradiation in air . 11
3.4.4 Irradiation in a medium other than air . 11
3.4.5 Irradiation in a vacuum . 11
3.4.6 Irradiation at high pressure . 12
3.4.7 Irradiation during mechanical stressing . 12
3.4.8 Irradiation during electrical stressing . 12
3.4.9 Combined irradiation procedures . 12
3.5 Post-irradiation effects . 12
3.6 Specified irradiation conditions . 12
4 Test . 12
4.1 General . 12
4.2 Test procedures . 13
4.3 Evaluation criteria . 13
4.3.1 End-point criteria . 13
4.3.2 Values of the absorbed dose . 14
4.4 Evaluation . 14
5 Report . 15
5.1 General . 15
5.2 Material . 15
5.3 Irradiation . 15
5.4 Test . 15
5.5 Results . 15
Annex A (informative) Examples of test reports . 16
Bibliography . 21

Figure A.1 – Change of mechanical properties as a function of absorbed dose for
magnetic coil insulation . 17
Figure A.2 – Breakdown voltage of insulating tape as a function of absorbed dose . 20

Table 1 – Critical properties and end-point criteria to be considered in evaluating the
classification of insulating materials in radiation environments . 14
Table A.1 – Example 1 – Magnetic coil insulation . 16
Table A.2 – Example 2 – Cable insulation . 18

60544-2 © IEC:2012 – 3 –
Table A.3 – Example 3 – Insulating tape . 19

– 4 – 60544-2 © IEC:2012

Part 2: Procedures for irradiation and test

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

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