IEC 60455-3-8:2013

Resin based reactive compounds used for electrical insulation - Part 3: Specifications for individual materials - Sheet 8: Resins for cable accessories

IEC 60455-3-8:2013 gives the requirements for resins for power cable accessories which conform to this specification and meet established levels of performance. However, the selection of a material by a user for a specific application should be based on the actual requirements necessary for adequate performance in that application and not on this specification alone. Key words: requirements for resins for power cable accessories

Composés réactifs à base de résines utilisés comme isolants électriques - Partie 3: Spécifications pour matériaux particuliers - Feuille 8: Résines pour accessoires de câble

La CEI 60455-3-8:2013 contient les exigences pour les résines pour accessoires de câble de puissance conformes à la présente spécification et répondant aux niveaux de performances établis. Cependant, il convient que le choix d'un matériau, par un utilisateur, pour une application spécifique, soit fondé sur les exigences réelles nécessaires pour une performance adéquate de cette application, et non fondé sur cette seule spécification. Mots clés: exigences pour les résines pour accessoires de câble de puissance

General Information

• Status: Published
• Publication Date: 28-Apr-2013
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.035.01 - Insulating materials in general
• Technical Committee: TC 15 - Solid electrical insulating materials
• Drafting Committee: WG 7 - TC 15/WG 7
• Current Stage: DELPUB - Deleted Publication
• Start Date: 16-Jun-2021
• Completion Date: 31-Jul-2017

Relations

• Revised: IEC 60455-3-8:2021 - Resin based reactive compounds used for electrical insulation - Part 3-8: Specifications for individual materials - Resins for cable accessories
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60455-3-8 ®
Edition 1.0 2013-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Resin based reactive compounds used for electrical insulation –
Part 3: Specifications for individual materials
Sheet 8: Resins for cable accessories

Composés réactifs à base de résines utilisés comme isolants électriques –
Partie 3: Spécifications pour matériaux particuliers
Feuille 8: Résines pour accessoires de câble

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IEC 60455-3-8 ®
Edition 1.0 2013-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Resin based reactive compounds used for electrical insulation –

Part 3: Specifications for individual materials

Sheet 8: Resins for cable accessories

Composés réactifs à base de résines utilisés comme isolants électriques –

Partie 3: Spécifications pour matériaux particuliers

Feuille 8: Résines pour accessoires de câble

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
M
CODE PRIX
ICS 29.035.01 ISBN 978-2-83220-758-1

– 2 – 60455-3-8 © IEC:2013
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Designation . 7
5 Type testing . 7
5.1 General . 7
5.2 Sampling . 8
5.3 Preparation and conditioning . 8
5.3.1 General . 8
5.3.2 Individual components prior to mixing . 8
5.3.3 Resin just after mixing (curing stage) . 8
5.3.4 Cured resin (original) . 8
5.3.5 Cured resin after thermal ageing (dry and wet) . 8
5.4 Sequence of tests . 8
5.5 Test report . 9
6 Test methods . 9
7 Information on supply, packaging, marking and labelling . 12
7.1 Packaging . 12
7.2 Marking and labelling . 12
7.2.1 General . 12
7.2.2 Components . 12
7.2.3 Accessory kit . 12
Bibliography . 13

Table 1 – Categories of resins . 7
Table 2 – Type tests: test methods and requirements . 10

60455-3-8 © IEC:2013 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RESIN BASED REACTIVE COMPOUNDS
USED FOR ELECTRICAL INSULATION –

Part 3: Specifications for individual materials
Sheet 8: Resins for cable accessories

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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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
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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.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60455-3-8 has been prepared by IEC technical committee 15:
Solid electrical insulating materials, in collaboration with working group 11 of Cenelec
technical committee 20.
The text of this standard is based on the following documents:
FDIS Report on voting
15/701/FDIS 15/711/RVD
Full information on the voting for the approval of this standard 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 – 60455-3-8 © IEC:2013
A list of all the parts in the IEC 60455 series, published under the general title Resin based
reactive compounds used for electrical insulation, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability 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.
60455-3-8 © IEC:2013 – 5 –
INTRODUCTION
This part of IEC 60455-3-8 is one of a series which deals with specifications for reactive
compounds and their components for electrical insulation. This series consist of three parts:
Part 1: Definitions and general requirements (IEC 60455-1);
Part 2: Methods of test (IEC 60455-2);
Part 3: Specifications for individual materials (IEC 60455-3)
IEC 60455-3-8 consists of one of the sheets comprising Part 3 as follows:
Sheet 8: Resins for cable accessories

– 6 – 60455-3-8 © IEC:2013
RESIN BASED REACTIVE COMPOUNDS
USED FOR ELECTRICAL INSULATION –

Part 3: Specifications for individual materials
Sheet 8: Resins for cable accessories

1 Scope
This sheet 8 of IEC 60455-3 gives the requirements for resins for power cable accessories
which conform to this specification and meet established levels of performance. However, the
selection of a material by a user for a specific application should be based on the actual
requirements necessary for adequate performance in that application and not on this
specification alone.
2 Normative references
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.
IEC 60093, Methods of test for volume resistivity and surface resistivity of solid electrical
insulating materials
IEC 60212, Standard conditions for use prior to and during the testing of solid electrical
insulating materials
IEC 60243-1, Electric 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, Resin based reactive compounds used for electrical insulation – Part 2:
Methods of test
ISO 179 (all parts), Plastics – Determination of Charpy impact properties
ISO 527 (all parts), Plastics – Determination of tensile properties
ISO 868, Plastics and ebonite – Determination of indentation hardness by means of a
durometer (Shore hardness)
ISO 1183-1, Plastics – Methods for determining the density of non-cellular plastics – Part 1:
Immersion method, liquid pyknometer method and titration method
ISO 2555, Plastics – Resins in the liquid state or as emulsions or dispersions – Determination
of apparent viscosity by the Brookfield Test method
—————————
Third edition to be published.

60455-3-8 © IEC:2013 – 7 –
ISO 4895, Plastics – Liquid epoxy resins – Determination of tendency to crystallize
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
tendency to crystallization
measurement of the ability of epoxy base resin not to change from a liquid to a solid state at a
certain temperature close to water freezing point for a fixed time
3.2
type tests
tests made on materials or components of a cable accessory in order to demonstrate
satisfactory performance characteristics to meet the intended application
3.3
outer protection
cured resinous compound to protect the connections from damage by external mechanical
forces
4 Designation
Resins for cable accessories are classified according to their application in categories as
follows:
Table 1 – Categories of resins
Voltage Class Function Characteristic
Low Voltage (L) Outer Protection (OP) Cures in presence of
a
water (W)
Medium Voltage (M) Insulation (I)
a
Low foaming during curing when in contact with water as described in the
subclause dealing with curing under water in IEC 60455-2.

A resin is identified by a combination of categories.
For example: Low voltage compound for outer protection: L-OP;
Low voltage compound for insulation, curing in presence of water: L-I-W;
Low voltage compound for insulation and mechanical protection: L-OP-I.
Tests for type testing are carried out in accordance with each of the resin categories.
Low voltage: 0,6/1,0 (1,2) kV
Medium voltage: 20,8/36 (42) kV
5 Type testing
5.1 General
Tests shall be carried out based on the category of the resins as defined in Table 1. These
tests are of such a nature that, once successfully completed, they need not to be repeated
unless changes are made in the material, component formulation or manufacturing process,
which might change the performance characteristics.

– 8 – 60455-3-8 © IEC:2013
5.2 Sampling
Samples for type testing shall be taken from material stored under conditions prescribed by
the manufacturer. The type testing of resins shall be carried out either:
– as a stand-alone test. Samples used for the type test shall be taken from material
available as agreed between supplier and user.
– or in combination with an accessory type test. Samples used for the resins type test shall
be taken from the same batch as used in the accessory type test. In the event that no
material from the same batch is available, then the samples used for the resins type test
shall be taken from material available as agreed between supplier and user.
5.3 Preparation and conditioning
5.3.1 General
For all tests, unless otherwise specified, conditioning shall be made in accordance with
IEC 60212 using standard atmosphere B.
5.3.2 Individual components prior to mixing
Components (resin and reactive component) shall be individually prepared, conditioned and
tested in accordance with the relevant test method as specified in stage 1 of the sequence of
tests given in Table 2. Filler, when supplied as a separate item, shall not be tested as a
component.
5.3.3 Resin just after mixing (curing stage)
Compounds shall be prepared and mixed according to supplier’s instructions and tested as
specified in stage 2 of the sequence of tests specified in Table 2.
5.3.4 Cured resin (original)
Compounds shall be prepared according to supplier’s instructions and cured for 24 h at room
temperature unless otherwise specified in the test method referred to in stage 3 of the
sequence of tests given in Table 2. The specimens shall be post-cured at (80 ± 2) °C for 24 h
unless otherwise specified in the test method, and then cooled in a desiccator for 24 h at
room temperature.
NOTE If degassing is needed, it will be indicated in the relevant test method and the conditions for the degassing
will also be indicated.
5.3.5 Cured resin after thermal ageing (dry and wet)
Cured resin shall be prepared according to supplier’s instructions and cured for 24 h at room
temperature unless otherwise specified in the test method referred to in stage 4 of the
sequence of tests given in Table 2. The specimens shall be post-cured at (80 ± 2) °C for 24 h
unless otherwise specified in the test method, and then cooled in a desiccator for 24 h at
room temperature.
NOTE If degassing is needed, it will be indicated in the relevant test method and the conditions for the degassing
will also be indicated.
5.4 Sequence of tests
Tests shall be carried out on the resin in the following four stages, in accordance with
Table 2:
Stage 1: Reactive components prior to mixing;
Stage 2: Resin just after mixing;
Stage 3: Cured resin (original);

60455-3-8 © IEC:2013 – 9 –
Stage 4: Cured resin after heat exposure (dry and wet).
5.5 Test report
The test report shall include the following data:
1) resin category and identification;
2) lot number or identification;
3) marking and labelling to Material safety data sheet (MSDS);
4) test results;
5) major test parameters, including conditioning and calibration, if any;
6) processing conditions used to mix the compound;
7) copy of Technical data sheet (TDS) and MSDS.
6 Test methods
International test methods are specified within this standard where available; for those tests
where there is no international test method available or the test method needs some
adaptation of conditions, the method or specific conditions are specified in IEC 60455-2.
For special applications, this water temperature in Table 2, 4-2 (Wet heat resistance), may be
insufficient to ensure the satisfactory performance of the resinous compound. In such cases,
upon agreement between manufacturer and user, the compound shall be tested using an
increased temperature of 90 °C. The chosen temperature shall be recorded in the test report.
Compliance at 90 °C also includes compliance at 70 °C.

– 10 – 60455-3-8 © IEC:2013
Table 2 – Type tests: test methods and requirements
Number Property Test method Units Requirement Remarks
Stage 1 – Reactive components prior to mixing

1 Viscosity at 5 °C ISO 2555 Pas ≤ 50
2 Tendency to crystallization ISO 4895 - No turbidity after 7 days Epoxy resin part only.
Stage 2 – Resins just after mixing (curing stage)
3 Pot life (0,3 l at 5 °C) IEC 60455-2 min
< 75
Pot life (0,3 l at 40 °C) min
≥ 5
4 Curing in presence of water, gas volume IEC 60455-2 ml For PUR resin type W only.
< 10
Curing in presence of water, physical structure No blisters or cracks, small amount Include picture of cut resin surface
of individual bubbles or inclusions with scale in report.
acceptable.
Stage 3 – Cured resins (original)

5 Density ISO 1183-1 g/cm Record value
Density should be > 1,05 g/cm
6 Impact strength (without notch) ISO 179 kJ/m No break is also acceptable.
≥ 6
7 Hardness (Shore) ISO 868 Record value
8 Tensile strength ISO 527 MPa Record value
9 Elongation at break ISO 527 % Record value
a
10 Dissipation factor at room temperature IEC 60250 Using conductive silver varnish as
MI: dissipation factor ≤ 0,1
electrode material
Using 500 V/mm at 50 Hz
a
11 Dielectric constant at room temperature IEC 60250 MI: relative permittivity ≤ 6 Using conductive silver varnish as
electrode material
Using 500 V/mm at 50 Hz
a
12 Volume resistivity at room temperature IEC 60093 Using conductive silver varnish as
Ω cm MI: ≥ 1 × 10
electrode material
LI: ≥ 1 × 10
Using 500 V/mm at 50 Hz
a
According IEC 60212 atmosphere B.

60455-3-8 © IEC:2013 – 11 –
Number Property Test method Units Requirement Remarks
Stage 4 – Cured resins after heat exposure

4-1 Dry heat resistance: 28 days at 120 °C (vented oven ) – IEC 60455-2

13 Mass loss IEC 60455-2 % ≤ 5
14 Impact strength (without notch) ISO 179 kJ/m No break is also acceptable.
≥ 4
b
4-2 Wet heat resistance: 28 days at 70 °C in water – IEC 60455-2

15 Hardness (retention/original) ISO 868 %
≥ 80
16 Tensile strength (retention/original) ISO 527 %
≥ 65
17 Elongation at break (retention/original) ISO 527 % ≥ 65
18 Dielectric strength (resin type LI) IEC 60243-1 kV/mm For resin type I only.
≥ 2
Dielectric strength (resin type MI)
≥ 5
b
See also Clause 6 regarding test at 90 °C.

– 12 – 60455-3-8 © IEC:2013
7 Information on supply, packaging, marking and labelling
7.1 Packaging
Packaging shall be sufficient to ensure that any stated shelf life of the reactive components is
maintained when stored under specified conditions of temperature and humidity.
7.2 Marking and labelling
7.2.1 General
The following information, in the relevant national language(s), shall be printed or labelled on
the resin components packaging and on the accessory kit.
7.2.2 Components
Each individual part of the resin or the reactive compounds if packed separately shall be
printed or labelled on its packaging with:
1) supplier’s name or logo;
2) part number or identification;
3) lot number or production date;
4) specified storage conditions, if any;
5) “Use before date” (shelf life);
6) health and safety marking according to relevant EU or national legislation;
7) mixing and application instructions;
8) resin categories.
7.2.3 Accessory kit
Each accessory kit containing a reactive component shall be printed or labelled on its
packaging and shall at least indicate:
1) the specified storage conditions, if any;
2) the “Use before date” (shelf life);
3) the health and safety marking according to relevant EU or nationa
...