prEN IEC 60544-4:2025
(Main)Electrical insulating materials - Determination of the effects of ionizing radiation - Part 4: Classification system for service in radiation environments
Electrical insulating materials - Determination of the effects of ionizing radiation - Part 4: Classification system for service in radiation environments
Elektroisolierstoffe - Bestimmung der Wirkung ionisierender Strahlung - Teil 4: Klassifikationssystem für den Einsatz unter Strahlung
Matériaux isolants électriques - Détermination des effets des rayonnements ionisants - Partie 4: Système de classification pour l'utilisation dans un environnement sous rayonnement
Električni izolacijski materiali - Ugotavljanje učinkov ionizirnega sevanja - 4. del: Klasifikacijski sistem za uporabo v okoljih s sevanjem
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Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2025
Električni izolacijski materiali - Ugotavljanje učinkov ionizirnega sevanja - 4. del:
Klasifikacijski sistem za uporabo v okoljih s sevanjem
Electrical insulating materials - Determination of the effects of ionizing radiation - Part 4:
Classification system for service in radiation environments
Elektroisolierstoffe - Bestimmung der Wirkung ionisierender Strahlung - Teil 4:
Klassifikationssystem für den Einsatz unter Strahlung
Matériaux isolants électriques - Détermination des effets des rayonnements ionisants -
Partie 4: Système de classification pour l'utilisation dans un environnement sous
rayonnement
Ta slovenski standard je istoveten z: prEN IEC 60544-4:2025
ICS:
17.240 Merjenje sevanja Radiation measurements
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.
112/696/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60544-4 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-10-10 2026-01-02
SUPERSEDES DOCUMENTS:
112/680/CD, 112/694/CC
IEC TC 112 : EVALUATION AND QUALIFICATION OF ELECTRICAL INSULATING MATERIALS AND SYSTEMS
SECRETARIAT: SECRETARY:
Germany Mr Bernd Komanschek
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
SC 45A
ASPECTS CONCERNED:
Electricity transmission and distribution,Safety
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
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(SEE AC/22/2007 OR NEW GUIDANCE DOC).
TITLE:
Electrical insulating materials – Determination of the effects of ionizing radiation – Part 4: Classification
system for service in radiation environments
PROPOSED STABILITY DATE: 2029
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IEC CDV 60544-4 © IEC 2025
CONTENTS
FOREWORD . 2
INTRODUCTION . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Classification system . 6
4.1 Definition of radiation index . 6
4.2 Dose rate . 6
4.3 Critical properties . 7
4.4 Temperatures . 7
4.5 Additional considerations . 7
5 Designation of radiation index and special service qualifiers . 8
5.1 Radiation index . 8
5.2 Radiation index with qualifications . 8
5.3 Examples . 8
Bibliography . 11
Table 1 – Critical properties and end-point criteria to be considered in evaluating
the classification of insulating materials in radiation environments . 9
Table 2 – Values for radiation index . 9
IEC CDV 60544-4 © IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Electrical insulating materials –
Determination of the effects of ionizing radiation –
Part 4: Classification system for service in radiation environments
FOREWORD
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IEC CDV 60544-4 © IEC 2025
However, implementers are cautioned that this may not represent the latest information, which
may be obtained from the patent database available at https://patents.iec.ch and
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rights.
IEC 60544-4 has been prepared by IEC technical committee TC 112: Evaluation and
qualification of electrical insulating materials and systems. It is an International Standard.
This third edition cancels and replaces the second edition published in 2003. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
– The purpose of the revision was to update the list of test methods and associated references
in Part 4.
The text of this International Standard is based on the following documents:
Draft Report on voting
112/XXX/XX 112/XXX/XX
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English [change
language if necessary].
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
IEC 60544 consists of the following parts, under the general title Electrical insulating materials
– Determination of the effects of ionizing radiation:
Part 1: Radiation interaction and dosimetry
Part 2: Procedures for irradiation and test
Part 3: (now incorporated into Part 2)
Part 4: Classification system for service in radiation environments
Part 5: Procedures for assessment of ageing in service
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
– reconfirmed,
– withdrawn, or
– revised.
IEC CDV 60544-4 © IEC 2025
INTRODUCTION
Organic insulating materials occupy a role of major significance in electrical technology. They
rank with metals and ceramics as the principal category of materials used in the construction
of components in this field. Of all materials, organics are amongst those that are most sensitive
to the effects of radiation, and the response varies widely for different materials. Thus, when
selecting insulating materials for specific service applications in radiation environments,
information on the radiation tolerance of the candidate materials is required. The purpose of
this part of IEC 60544 is to define an internationally recommended classification system to
categorize the radiation endurance of insulating materials for such applications.
This standard is the fourth in a series dealing with the effect of ionizing radiation on insulating
materials. IEC 60544-1 constitutes an introduction dealing very broadly with the problems
involved in evaluating radiation effects. It also provides a guide to dosimetry terminology,
several methods of determining exposure and absorbed dose, and methods of calculating
absorbed dose in any specific material from the dosimetry method applied.
IEC 60544-2 describes procedures for maintaining seven different types of exposure conditions
during the irradiation. It also specifies the controls that are maintained over these conditions so
that when test results are reported, reliable comparisons of material performances can be
obtained. In addition, it defines certain important irradiation conditions and the test procedures
to be used for property change determinations and the corresponding end-point criteria.
IEC 60544-3 has been incorporated into the second edition of IEC 60544-2.
IEC 60544-5 deals with procedures for the assessment of ageing in service.
Note from IEC: the following item is listed in the bibliography but not cited in the text. Please
find a suitable place to cite it in the text to justify its inclusion in the bibliography.
IEC 60167, Methods of test for the determination of the insulation resistance of solid insulating
materials
IEC CDV 60544-4 © IEC 2025
1 Scope
This part of IEC 60544 provides a classification s
...
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