This document presents the important material properties of polymeric materials used in outdoor insulation and, where applicable, lists standardized test methods including minimum requirements. If no standardized tests are available, the test methods reported in literature are summarized.

This document is valid for insulating materials having polymeric insulation, which are used in outdoor high voltage electrical applications with a system voltage greater than 1 000 V AC and 1 500 V DC (several tests are only defined for alternating current, which are not applicable for direct current). Such applications are relevant where the housing is an integral part of the device, for example in surge arresters and cable terminations. The scope of this document is limited to the insulation materials only and is not generally intended for coating materials (coating materials are, for example, thin layers applied on toughened glass and ceramic). Some tests mentioned in this document are applicable for coating and are under consideration by CIGRE. The performance of insulators in service depends on several factors such as the type of material, the design and environmental conditions. Consequently, the choice of materials that fulfil the requirements listed in Table 1 is a necessary condition but does not guarantee satisfactory performance when used in outdoor insulation.

In Annex A and Annex B different test methods for testing additional properties are given, which are not standardized.

PDF Catalog

PDF Pages	PDF Title
2	undefined
4	CONTENTS
6	FOREWORD
8	INTRODUCTION
9	1 Scope 2 Normative references
10	3 Terms and definitions
11	4 Important material properties 4.1 General 4.2 Resistance to tracking and erosion 4.3 Arc resistance
12	4.4 Water diffusion test (resistance of material to chemical and physical degradation by water) 4.4.1 General 4.4.2 Test specimens 4.4.3 Test procedure
13	Figures Figure 1 – Example of boiling container for water diffusion test
14	4.4.4 Minimum requirements Figure 2 – Electrodes for voltage test Figure 3 – Voltage test circuit
15	4.5 Tear strength 4.6 Volume resistivity 4.7 Breakdown field strength 4.8 Stress corrosion test (resistance to chemical attack) 4.8.1 General
16	4.8.2 Test specimens 4.8.3 Procedure 4.8.4 Acceptance criteria 4.9 Resistance to weathering and UV procedure Figure 4 – Example of permanent load application for stress corrosion test
17	4.10 Resistance to flammability procedure 4.11 Glass transition temperature
18	Figure 5 – Definition of glass transition temperature Tg
19	4.12 Hydrophobicity 4.12.1 General 4.12.2 Transfer of hydrophobicity
20	Figure 6 – Specimen with adhesive foil
21	Figure 7 – Specimen with pollution layer
23	4.12.3 Retention and recovery of hydrophobicity Figure 8 – Area for the drop application for measurement according to IEC TS 62073 (example for Method A)
24	5 Important properties and minimum requirements of polymeric insulation materials for outdoor use under HV stress Table 1 – Important properties and minimum requirements of polymeric insulation materials for outdoor use under HV stress
27	Annex A (informative)Additional measuring methods A.1 General A.2 Resistance to corona and ozone A.3 Resistance to acid attack generated by partial discharge under wet, contaminated, and energization condition
28	Annex B (informative)Water immersion test B.1 General B.2 Test procedure
29	Figure B.1 – Example of water uptake of two different kinds of materials (MFRP and UFRP) Table B.1 – Example of dielectric properties in dry conditions and after water immersion for 100 days
30	Bibliography

Status	Definitive
Pages	34
Publication Date	2021-10-29
ISBN	978 0 580 99212 4
Standard Number	PD IEC TR 62039:2021
Title	Selection guidelines for polymeric materials for outdoor use under HV stress
Identical National Standard Of	IEC TR 62039:2021, IEC TR 62039:2021
Replaces	PD IEC/TR 62039:2007
Descriptors	Plastics, Electrical insulating materials, Electric insulators, Physical properties of materials, High voltage, Solid electrical insulating materials, Test methods, Outdoor electric equipment, High-voltage installations, Electrical insulation, Electrical properties of materials, Polymers
Publisher	BSI
Committee	GEL/112
ICS Codes	29.035.20 - Plastics and rubber insulating materials