IEC TR 61244-4:2019

Determination of long-term radiation ageing in polymers - Part 4: Effects of different temperatures and dose rates under radiation conditions

IEC TR 61244-4:2019(E) provides general guidance for the evaluation/verification of electrical insulation materials (EIM) and electrical insulation systems (EIS) intended to be used in types of equipment exposed to ionizing radiation. Beside sensors, actuators/motors as well as plugs and terminals, cables are a well-known typical application of those EIM and EIS. Their type spectrum covers low voltage power cables, control cables and instrumentation cables. Because of their comparable simple design, cables are the ideal type of equipment to study EIM and EIS degradation processes. But the results of these studies can be easily transferred to the enumerated types of equipment.
Nonetheless, this document provides a state-of-the art report on qualification/verification procedures used to simulate simultaneous effects of temperature and radiation at varying intensities rather than give detailed test programmes valid for specific test methods.
NOTE 1 Use of this document with specific products can require specification of additional product related procedures.
NOTE 2 Some of the procedures described in this document are emerging technologies. Therefore, specified prerequisites, former experiences as well as boundary conditions can be additionally taken into account.

General Information

• Status: Published
• Publication Date: 24-Sep-2019
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 17.240 - Radiation measurements
• ICS: 29.035.01 - Insulating materials in general
• Technical Committee: TC 112 - Evaluation and qualification of electrical insulating materials and systems
• Drafting Committee: WG 2 - TC 112/WG 2
• Current Stage: PPUB - Publication issued
• Start Date: 21-Oct-2019
• Completion Date: 25-Sep-2019

Standards Content (Sample)

IEC TR 61244-4
®

Edition 1.0 2019-09
TECHNICAL
REPORT



Determination of long-term radiation ageing in polymers –
Part 4: Effects of different temperatures and dose rates under radiation
conditions
IEC TR 61244-4:2019-09(en)

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IEC TR 61244-4

®


Edition 1.0 2019-09




TECHNICAL



REPORT



















Determination of long-term radiation ageing in polymers –

Part 4: Effects of different temperatures and dose rates under radiation

conditions


























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ELECTROTECHNICAL


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ICS 17.240; 29.035.01 ISBN 978-2-8322-7429-3




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– 2 – IEC TR 61244-4:2019 © IEC 2019
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviated terms . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms . 7
4 Radiation induced degradation mechanisms at standard ambient conditions . 8
4.1 General conventions . 8
4.2 Effect of presence of oxygen . 9
4.3 Effect of dose-rate effect-1: Physical aspects . 9
4.4 Effect of dose-rate-2: Chemical aspects . 10
4.5 Research on degradation m
...