SIST EN 62217:2006
(Main)Polymeric insulators for indoor and outdoor use with a nominal voltage > 1 000 V - General definitions, test methods and acceptance criteria
Polymeric insulators for indoor and outdoor use with a nominal voltage > 1 000 V - General definitions, test methods and acceptance criteria
This International Standard is applicable to polymeric insulators whose insulating body consists of one or various organic materials. Polymeric insulators covered by this standard include both solid core and hollow insulators. They are intended for use on overhead lines and in indoor and outdoor equipment with a rated voltage greater than 1 000 V. The object of this standard is - to define the common terms used for polymeric insulators, - to prescribe common test methods for design tests on polymeric insulators, - to prescribe acceptance or failure criteria, if applicable, - to give recommendations for polymeric insulator test standards or product standards, complemented by specific requirements as needed. These tests, criteria and recommendations are intended to ensure a satisfactory life-time under normal operating and environmental conditions (see Clause 5).
Polymerisolatoren für Innenraum- und Freiluftanwendung mit Nennspannungen über 1 kV - Allgemeine Begriffe, Prüfverfahren und Annahmekriterien
Isolateurs polymériques pour utilisation à l'intérieur ou à l'extérieur à une tension nominale > 1 000 V - Définitions générales, méthodes d'essai et critères d'acceptation
Polimerni izolatorji za notranjo in zunanjo uporabo za napetosti nad 1000 V – Splošne definicije, preskusne metode in prevzemna merila (IEC 62217:2005)
General Information
Relations
Standards Content (Sample)
SLOVENSKI SIST EN 62217:2006
STANDARD
julij 2006
Polimerni izolatorji za notranjo in zunanjo uporabo za napetosti nad 1000 V –
Splošne definicije, preskusne metode in prevzemna merila (IEC 62217:2005)
Polymeric insulators for indoor and outdoor use with a nominal voltage above 1000
V – General definitions, test methods and acceptance criteria (IEC 62217:2005)
ICS 29.080.10 Referenčna številka
SIST EN 62217:2006(en)
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
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EUROPEAN STANDARD
EN 62217
NORME EUROPÉENNE
March 2006
EUROPÄISCHE NORM
ICS 29.080.10
English version
Polymeric insulators for indoor and outdoor use
with a nominal voltage > 1 000 V -
General definitions, test methods and acceptance criteria
(IEC 62217:2005)
Isolateurs polymériques pour utilisation Polymerisolatoren für Innenraum-
à l'intérieur ou à l'extérieur und Freiluftanwendung
à une tension nominale > 1 000 V - mit Nennspannungen über 1 kV -
Définitions générales, méthodes d'essai Allgemeine Begriffe, Prüfverfahren
et critères d'acceptation und Annahmekriterien
(CEI 62217:2005) (IEC 62217:2005)
This European Standard was approved by CENELEC on 2006-02-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62217:2006 E
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EN 62217:2006 - 2 -
Foreword
The text of document 36/244/FDIS, future edition 1 of IEC 62217, prepared by IEC TC 36, Insulators, was
submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 62217 on
2006-02-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2006-11-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2009-02-01
This European Standard makes reference to International Standards. Where the International Standard
referred to has been endorsed as a European Standard or a home-grown European Standard exists, this
European Standard shall be applied instead. Pertinent information can be found on the CENELEC web
site.
__________
Endorsement notice
The text of the International Standard IEC 62217:2005 was approved by CENELEC as a European
Standard without any modification.
__________
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INTERNATIONAL IEC
STANDARD 62217
First edition
2005-10
Polymeric insulators for indoor and outdoor use
with a nominal voltage >1 000 V –
General definitions, test methods
and acceptance criteria
IEC 2005 Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale V
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue
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– 2 – 62217 IEC:2005(E)
CONTENTS
FOREWORD.3
INTRODUCTION.5
1 Scope and object.6
2 Normative references .6
3 Terms and definitions .7
4 Identification.9
5 Environmental conditions.9
6 Information on transport, storage and installation .10
7 Classification of tests .10
7.1 Design tests .10
7.2 Type tests .10
7.3 Sample tests .10
7.4 Routine tests .11
8 General requirements for insulator test specimens .11
9 Design tests .11
9.1 General .11
9.2 Tests on interfaces and connections of end fittings.11
9.3 Tests on shed and housing material .14
9.4 Tests on the core material .17
Annex A (normative) Wheel test.22
Annex B (normative) Test at multiple stresses .24
Annex C (informative) Difference between the tracking and erosion and accelerated
ageing tests on polymeric insulators .30
Annex D (informative) Recommended application of tests.31
Annex E (informative) Explanation of the concept of classes for the design tests .32
Bibliography.33
Figure 1 – Example of boiling container for the water diffusion test.19
Figure 2 – Examples of test specimen for core material .20
Figure 3 – Electrodes for the voltage test.21
Figure 4 – Voltage test circuit .21
Figure A.1 – Test arrangement of the tracking wheel test.23
Figure B.1 — Typical layout of the test specimens in the chamber and main
dimensions of the chamber .24
Figure B.2 – Multiple stress cycle .27
Figure B.3 – Typical layout of the rain and salt fog spray systems and the xenon lamp .28
Figure B.4 – Spectrum of xenon arc lamp and solar spectrum.28
Figure B.5 – Reference porcelain insulator .29
Table 1 – Normal environmental conditions.9
Table 2 – Initial NaCl content of the water as a function of the specimen dimensions.16
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62217 IEC:2005(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
POLYMERIC INSULATORS FOR INDOOR AND OUTDOOR USE
WITH A NOMINAL VOLTAGE >1 000 V –
GENERAL DEFINITIONS, TEST METHODS
AND ACCEPTANCE CRITERIA
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
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
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
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
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 62217 has been prepared by IEC technical committee 36:
Insulators.
The text of this standard is based on the following documents:
FDIS Report on voting
36/244/FDIS 36/245/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.
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– 4 – 62217 IEC:2005(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.
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62217 IEC:2005(E) – 5 –
INTRODUCTION
Polymeric insulators consist either of one insulating material (resin insulators) or two or
several insulating materials (composite insulators). The insulating materials are generally
cross-linked organic materials synthesized from carbon or silicon chemistry and form the
insulating body. Insulating materials can be composed from organic materials containing
various inorganic and organic ingredients, such as fillers and extenders. End fittings are often
used at the ends of the insulating body to transmit mechanical loads. Despite these common
features, the materials used and the construction details employed by different manufacturers
may be widely different.
Some tests have been grouped together as "design tests", to be performed only once for
insulators of the same design. The design tests are intended to eliminate insulator designs,
materials or manufacturing technologies which are not suitable for high-voltage applications.
The influence of time on the electrical properties of the complete polymeric insulator and its
components (core material, housing, interfaces, etc.) has been considered in specifying the
design tests in order to ensure a satisfactory life-time under normal operating and
environmental conditions.
Pollution tests, according to IEC 60507 or IEC 61245, are not included in this International
Standard, their applicability to composite insulators not having been proven. The results of
such pollution tests performed on insulators made of polymeric materials do not correlate with
experience obtained from service. Specific pollution tests for polymeric insulators are still
under consideration.
The tracking and erosion tests given in this standard are considered as screening tests
intended to reject materials or designs which are inadequate. These tests are not intended to
predict long-term performance for insulator designs under cumulative service stresses. For
more information, see Annex C.
Composite insulators are used in both a.c. and d.c. applications. In spite of this fact a specific
tracking and erosion test procedure for d.c. applications as a design test has not yet been
defined and accepted. The 1 000 h a.c. tracking and erosion test described in this standard is
used to establish a minimum requirement for the tracking resistance of the housing material.
IEC Guide 111 has been followed during preparation of this standard wherever possible.
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POLYMERIC INSULATORS FOR INDOOR AND OUTDOOR USE
WITH A NOMINAL VOLTAGE >1 000 V –
GENERAL DEFINITIONS, TEST METHODS
AND ACCEPTANCE CRITERIA
1 Scope and object
This International Standard is applicable to polymeric insulators whose insulating body
consists of one or various organic materials. Polymeric insulators covered by this standard
include both solid core and hollow insulators. They are intended for use on overhead lines
and in indoor and outdoor equipment with a rated voltage greater than 1 000 V.
The object of this standard is
– to define the common terms used for polymeric insulators,
– to prescribe common test methods for design tests on polymeric insulators,
– to prescribe acceptance or failure criteria, if applicable,
– to give recommendations for polymeric insulator test standards or product standards,
complemented by specific requirements as needed.
These tests, criteria and recommendations are intended to ensure a satisfactory life-time
under normal operating and environmental conditions (see Clause 5).
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 60060-1, High-voltage test techniques – Part 1: General definitions and test requirements
IEC 60068-2-11, Basic environmental testing procedures – Part 2: Tests, Test KA: Salt mist
IEC 60507, Artificial pollution tests on high-voltage insulators to be used on a.c. systems
IEC 60695-11-10, Fire hazard testing – Part 11-10: Test flames – 50 W horizontal and vertical
flame test methods
IEC 60721-1, Classification of environmental conditions – Part 1: Environmental parameters
and their severities
IEC 60815, Guide for the selection of insulators in respect of polluted conditions
IEC Guide 111, Electrical high-voltage equipment in high-voltage substations – Common
recommendations for product standards
ISO 868, Plastics and ebonite – Determination of indentation hardness by means of a
durometer (Shore hardness)
ISO 4287, Geometrical Product Specifications (GPS) – Surface texture: Profile method –
Terms, definitions and surface texture parameters
ISO 4892-1, Plastics – Methods of exposure to laboratory light sources – Part 1: General
Guidance
ISO 4892-2, Plastics – Methods of exposure to laboratory light sources – Part 2: Xenon-arc
sources
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62217 IEC:2005(E) – 7 –
ISO 4892-3, Plastics – Methods of exposure to laboratory light sources – Part 3: Fluorescent
UV lamps
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
polymeric insulator
insulator whose insulating body consists of at least one organic based material.
NOTE Coupling devices may be attached to the ends of the insulating body
NOTE Polymeric insulators are also known as non-ceramic insulators.
[IEV 471-01-13]
3.2
resin insulator
polymeric insulator whose insulating body consists of a solid shank and sheds protruding from
the shank made from only one organic based housing material (e.g. cycloaliphatic epoxy)
3.3
composite insulator
insulator made of at least two insulating parts, namely a core and a housing equipped with
metal fittings
NOTE Composite insulators, for example, can consist either of individual sheds mounted on the core, with or
without an intermediate sheath, or alternatively, of a housing directly moulded or cast in one or several pieces on
to the core.
[IEV 471-01-02]
3.4
core (of an insulator)
central insulating part of an insulator which provides the mechanical characteristics
NOTE The housing and sheds are not part of the core.
[IEV 471-01-03]
3.5
insulator trunk
central insulating part of an insulator from which the sheds project.
NOTE Also known as shank on smaller insulators.
[IEV 471-01-11]
3.6
housing
external insulating part of composite insulator providing necessary creepage distance and
protecting core from environment
NOTE An intermediate sheath made of insulating material may be part of the housing.
[IEV 471-01-09]
3.7
shed (of an insulator)
insulating part, projecting from the insulator trunk, intended to increase the creepage
distance. The shed can be with or without ribs
[IEV 471-01-15]
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3.8
creepage distance
shortest distance or the sum of the shortest distances along the surface on an insulator
between two conductive parts which normally have the operating voltage between them
NOTE 1 The surface of cement or of any other non-insulating jointing material is not considered as forming part of
the creepage distance.
NOTE 2 If a high resistance coating is applied to parts of the insulating part of an insulator, such parts are
considered to be effective insulating surfaces and the distance over them is included in the creepage distance.
[IEV 471-01-04]
3.9
arcing distance
shortest distance in air external to the insulator between the metallic parts which normally
have the operating voltage between them
[IEV 471-01-01]
3.10
interfaces
surface between the different materials
NOTE Various interfaces occur in most composite insulators, e.g.
− between housing and end fittings,
− between various parts of the housing, e.g. between sheds, or between sheath and sheds,
− between core and housing.
3.11
end fitting
integral component or formed part of an insulator intended to connect it to a supporting
structure, or to a conductor, or to an item of equipment, or to another insulator
NOTE Where the end fitting is metallic, the term “metal fitting” is normally used.
[IEV 471-01-06, modified]
3.12
connection zone
zone where the mechanical load is transmitted between the insulating body and the end fitting
3.13
coupling (of an insulator)
part of the end fitting which transmits load to the hardware external to the insulator
3.14
tracking
process which forms irreversible degradation by formation of conductive paths (tracks)
starting and developing on the surface of an insulating material
NOTE These paths are conductive even under dry conditions.
3.15
erosion
irreversible and non-conducting degradation of the surface of the insulator that occurs by loss
of material which can be uniform, localized or tree-shaped
NOTE Light surface traces, commonly tree-shaped, can occur on composite insulators as on ceramic insulators,
after partial flashover. These traces are not considered to be objectionable as long as they are non-conductive.
When they are conductive they are classified as tracking
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62217 IEC:2005(E) – 9 –
3.16
crack
any internal fracture or surface fissure of depth greater than 0,1 mm
3.17
puncture (of an insulator)
permanent loss of dielectric strength due to a disruptive discharge passing through the solid
insulating material of an insulator
[IEV 471-01-14]
4 Identification
The manufacturer’s drawing shall show the relevant dimensions and information necessary for
identifying and testing the insulator in accordance with this standard and the applicable IEC
product standard(s). The drawing shall also show applicable manufacturing tolerances.
Each insulator shall be marked with the name or trade mark of the manufacturer and the year
of manufacture. In addition, each insulator shall be marked with the rated characteristics
specified in the relevant IEC product standards. These markings shall be legible, indelible and
their fixings (if any) weather- and corrosion-proof.
5 Environmental conditions
The normal environmental conditions to which insulators are submitted in service are defined
according to Table 1.
When special environmental conditions prevail at the location where insulators are to be put
in service, they shall be specified by the user by reference to IEC 60721-1.
Table 1 – Normal environmental conditions
Condition Indoor insulation Outdoor insulation
Does not exceed 40 °C and its average value measured over a period of
Maximum ambient air temperature
24 h does not exceed 35 °C
Minimum ambient air temperature –25 °C –40 °C
Negligible vibration due to causes external to the insulators or to earth
Vibration
a
tremors
b
2
Solar radiation To be neglected Up to a level of 1 000 W/m
Pollution by dust, smoke, corrosive
No significant pollution by dust,
gases, vapours or salt may occur.
Pollution of the ambient air smoke, corrosive and/or flammable
Pollution does not exceed “heavy” as
gases, vapours, or salt
defined in IEC 60815
The average value of the relative
humidity, measured over a period of
24 h, does not exceed 95 %;
Humidity measured over a period of one
month, does not exceed 95 %. For
these conditions, condensation may
occasionally occur
a
Vibration due to external causes can be dealt with in accordance to IEC 60721-1.
b
Details of solar radiation are given in IEC 60721-1.
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6 Information on transport, storage and installation
Manufacturers of insulators shall provide appropriate instructions and information covering
general conditions during transport, storage and installation of the insulators. These
instructions can include recommendations for cleaning or maintenance.
7 Classification of tests
The tests are divided into four groups as follows:
7.1 Design tests
The design tests are intended to verify the suitability of the design, materials and method of
manufacture (technology).
A polymeric insulator design is generally defined by
– materials of the core, housing and manufacturing method,
– material of the end fittings, their design and method of attachment,
– layer thickness of the housing over the core (including a sheath where used).
Additional parameters defining design may be given in the relevant product standard.
When changes in the design of a polymeric insulator occur, re-qualification shall be carried
out according to the requirements of the relevant product standard. Typically, only part of the
tests are repeated. A survey of the tests is given in Annex D.
When a polymeric insulator is submitted to the design tests, it becomes a parent insulator for
a design class and the results shall be considered valid for the whole class. This tested
parent insulator defines a design class of insulators which have the following characteristics:
a) same materials for the core and housing and same manufacturing method;
b) same material as for the end fittings, same design and same method of attachment;
c) same or greater minimum layer thickness of housing over the core (including a sheath
where used).
Additional parameters to define a class of design may be given in the relevant product
standard.
7.2 Type tests
The type tests are intended to verify the main characteristics of a polymeric insulator, which
depend mainly on its shape and size. Type tests shall be applied to polymeric insulators
belonging to an already qualified design class. The type tests shall be repeated only when the
type of polymeric insulator is changed. The parameters defining a type of polymeric insulator
are given in the relevant product standard.
The applicable type tests are given in the relevant product standard.
7.3 Sample tests
The sample tests are intended to verify the characteristics of polymeric insulators which
depend on the quality of manufacture and on the materials used. They are made on insulators
taken at random from lots offered for acceptance.
The applicable sample tests are given in the relevant product standard.
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62217 IEC:2005(E) – 11 –
7.4 Routine tests
These tests are intended to eliminate polymeric insulators with manufacturing defects. They
are carried out on every insulator to be supplied.
The applicable routine tests are given in the relevant product standard.
8 General requirements for insulator test specimens
Insulator test specimens for tests of polymeric insulators shall be checked prior to tests:
• for correct assembly, for example by applying the mechanical routine test specified in the
relevant product standard,
• by visual examination according to the relevant product standard;
• for conformance of dimensions with the actual drawing.
For dimensions d without tolerances the following tolerances are acceptable:
• ± (0,04 x d + 1,5) mm when d ≤ 300 mm;
• ± (0,025 x d + 6) mm when d > 300 mm with a maximum tolerance of 50 mm.
The measurement of creepage distances shall be related to the design dimensions and
tolerances as determined from the insulator drawing, even if this dimension is greater than the
value originally specified. When a minimum creepage is specified, the negative tolerance is
also limited by this value.
In the case of insulators with creepage distance exceeding 3 m, it is allowed to measure a
short section around 1 m long of the insulator and to extrapolate.
The housing colour of the test specimens shall be approximately as specified in the drawing.
The number of test specimens, their selection and dimensions are specified in the relevant
clauses of this standard or in the relevant
...
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