IEC TR 62039:2007

TECHNICAL IEC
REPORT TR 62039
First edition
2007-03
Selection guide for polymeric materials
for outdoor use under HV stress

Reference number
IEC/TR 62039:2007(E)
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TECHNICAL IEC
REPORT TR 62039
First edition
2007-03
Selection guide for polymeric materials
for outdoor use under HV stress
© IEC 2007 ⎯ Copyright - all rights reserved
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– 2 – TR 62039 © IEC:2007(E)
CONTENTS
FOREWORD.3
INTRODUCTION.5

1 Scope.6
2 Normative references .6
3 Important material properties.7
3.1 General .7
3.2 Resistance to tracking and erosion.7
3.3 Resistance to corona and ozone.8
3.4 Resistance to chemical and physical degradation by water.8
3.5 Tear strength.8
3.6 Volume resistivity .9
3.7 Breakdown field strength .9
3.8 Resistance to chemical attack .9
3.9 Resistance to weathering and UV.10
3.10 Resistance to flammability.10
3.11 Arc resistance .10
3.12 Glass transition temperature .10
3.13 Hydrophobicity .10
4 Summary.11

Annex A (normative) Important properties and minimum requirements of polymeric
insulation materials for outdoor use under HV stress .12

Bibliography.14

Table A.1 – Important properties and minimum requirements of polymeric insulation
materials for outdoor use under HV stress .12

TR 62039 © IEC:2007(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SELECTION GUIDE FOR POLYMERIC MATERIALS
FOR OUTDOOR USE UNDER HV STRESS

FOREWORD
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
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
The main task of IEC technical committees is to prepare International Standards. However, a
technical committee may propose the publication of a technical report when it has collected
data of a different kind from that which is normally published as an International Standard, for
example "state of the art".
IEC 62039, which is a technical report, has been prepared by IEC technical committee 112:
Evaluation and qualification of electrical insulating materials and systems.
The text of this technical report is based on the following documents:
Enquiry draft Report on voting
112/34/DTR 112/54/RVC
Full information on the voting for the approval of this technical report can be found in the
report on voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 4 – TR 62039 © IEC:2007(E)
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

TR 62039 © IEC:2007(E) – 5 –
INTRODUCTION
There is an urgent need within utilities and industry for material standards, which define the
physical properties of the polymers applied for outdoor insulation. This requirement was
identified during discussions in IEC TC 36 and IEC TC 15 which is today part of IEC TC 112.
As a consequence, in the year 2001, CIGRE formed the WG D1.14 with the specific task of
defining the physical parameters important for the polymeric materials applied in outdoor
insulation and to develop the relevant test methods where necessary. As a first step, a state-
of-the-art report was issued by CIGRE in the brochure 255. Twelve properties have been
identified; standardised test methods and minimum requirements where available for eight of
them. For the remaining four properties, test methods and minimum requirements still need to
be defined. This will be the future task of WG D1. This IEC Technical Report presents – as
conclusion of the CIGRE-report – the important material properties for polymeric materials
used in outdoor insulation and where they are applicable, and lists the standardised test
methods including the minimum requirements. If no standardised tests are available, then test
methods reported in literature are summarised.

– 6 – TR 62039 © IEC:2007(E)
SELECTION GUIDE FOR POLYMERIC MATERIALS
FOR OUTDOOR USE UNDER HV STRESS

1 Scope
This IEC Technical Report presents the important material properties for polymeric materials
used in outdoor insulation and, where applicable, lists the standardised test methods
including the minimum requirements. If no standardised tests are available, then test methods
reported in literature are summarised.
This report is valid for insulating materials used in outdoor high voltage electrical applications
with a system voltage greater than 1000 V a.c. having polymeric insulation including also such
applications where the housing is an integral part of the devices e.g. in surge arrestors and
cable terminations. The scope of this report is limited to the materials only. The performance
of insulators in service depends on several factors such as the type of material, the design,
environmental conditions etc. Consequently, the choice of materials that fulfil the require-
ments listed below is a necessary condition but does not guarantee satisfactory performance
when used in outdoor insulation.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60093, Methods of test for volume resistivity and surface resistivity of solid electrical
insulating materials
IEC 60243-1, Electrical strength of insulating materials – Test methods – Part 1: Tests at
power frequencies
IEC 60250, Recommended methods for the determination of the permittivity and dielectric
dissipation factor of electrical insulating materials at power, audio and radio frequencies
including metre wavelengths
IEC 60455-2:1998, Resin based reactive compounds used for electrical insulation – Part 2:
Methods of test
IEC 60587, Test method for evaluating resistance to tracking and erosion of electrical
insulating materials used under severe ambient conditions
IEC 60695-11-10, Fire hazard testing – Part 11-10: Test flames – 50 W horizontal and vertical
flame test methods
IEC 61006, Electrical insulating materials – Methods of test for the determination of the glass
transition temperature
IEC 61109, Composite insulators for a.c. overhead lines with a nominal voltage greater than
1000 V – Definitions, test methods and acceptance criteria
Amendment 1 (1995)
IEC 61621, Dry, solid insulating materials – Resistance test to high-voltage, low-current arc
discharges
TR 62039 © IEC:2007(E) – 7 –
IEC 62217, Polymeric insulators for indoor and outdoor use with a nominal voltage greater
than 1 000 V – General definitions, test methods and acceptance criteria
ISO 62, Plastics – Determination of water absorption
ISO 4892-2, Plastics – Method
...