EN 62231-1:2016

Composite station post insulators for substations with AC voltages greater than 1 000 V up to 245 kV - Part 1: Dimensional, mechanical and electrical characteristics

IEC 62231-1:2015 specifies main dimensions and values for mechanical and electrical characteristics of composite station post insulators.

Verbund-Stationsstützisolatoren für Unterwerke für Wechselspannungen größer 1 000 V bis einschließlich 245 kV - Teil 1: Maßliche, mechanische und elektrische Eigenschaften

Supports isolants composites destinés aux postes à courant alternatif de tensions supérieures à 1 000 V jusqu’à 245 kV - Partie 1: Caractéristiques dimensionnelles, mécaniques et électriques

L'IEC 62231-1:2015 spécifie les principales dimensions et valeurs des caractéristiques mécaniques et électriques des supports isolants composites.

Postajni kompozitni izolatorji za postaje z izmeničnimi napetostmi, ki so višje od 1000 V in ne presegajo 245 kV - 1. del: Dimenzijske, mehanske in električne karakteristike (IEC 62231-1:2015)

Ta del standarda IEC 62231 se uporablja za postajne kompozitne izolatorje za postaje z izmeničnimi napetostmi, ki so višje od 1000 V in ne presegajo 245 kV.
Uporablja se tudi za postajne kompozitne izolatorje s podobno zasnovo, ki so v uporabi v sistemih elektrifikacije železniških prog.
Ta del standarda IEC 62231 določa glavne dimenzije in vrednosti za mehanske in električne karakteristike postajnih kompozitnih izolatorjev.
OPOMBA Postajni kompozitni izolatorji, ki so zajeti v tem standardu, so namenjeni predvsem za zunanjo uporabo, vendar se lahko uporabljajo tudi v notranjih prostorih.

General Information

• Status: Published
• Publication Date: 07-Jan-2016
• Withdrawal Date: 16-Nov-2018
• ICS: 29.080.10 - Insulators
• Technical Committee: CLC/SR 36 - Insulators for substations
• Drafting Committee: IEC/TC 36 - IEC_TC_36
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 08-Jan-2016
• Completion Date: 08-Jan-2016
• Ref Project: SIST EN 62231-1:2016 - Composite station post insulators for substations with AC voltages greater than 1 000 v up to 245 kv - Part 1: Dimensional, mechanical and electrical characteristics (IEC 62231-1:2015)

Overview

EN 62231-1:2016 (IEC 62231-1:2015) specifies the main dimensional, mechanical and electrical characteristics for composite station post insulators used in substations with AC voltages greater than 1 000 V up to 245 kV. The standard applies to outdoor (and also indoor) composite post insulators and is intended to support consistent design, testing, procurement and installation across utilities, manufacturers and test laboratories.

Key topics and technical requirements

• Scope & applicability: Composite station post insulators for substations and similar railway power-station equipment with AC voltages >1 kV up to 245 kV.
• Mechanical characteristics: Defined loads and mechanical limits including maximum design cantilever load (MDCL), specified cantilever load (SCL), specified compression load (SCoL), specified tension load (STL) and specified torsion load (SToL).
• Dimensional characteristics: Insulator height, maximum diameter of insulating part, metal fitting (end fitting) arrangements and tolerances.
• Electrical characteristics: Minimum creepage distance values tied to pollution-class representative unified specific creepage distances (USCD). The standard references USCD examples of 34.7 mm/kV and 43.3 mm/kV (IEC representative medium/heavy pollution classes) and a North American practice value 27.8 mm/kV.
• Designation, marking and documentation: Rules for insulator designation, marking and information required for correct application.
• Normative references: Relies on related documents such as IEC 60815‑1, IEC 60815‑3 and IEC 62231 (definitions, test methods, acceptance criteria).

Practical applications and who uses this standard

• Power utilities and substation designers: to specify insulator performance, creepage requirements and mechanical load ratings for transmission and distribution substations.
• Insulator manufacturers and designers: to develop products meeting consistent dimensional and mechanical criteria and to align end fitting arrangements.
• Procurement and specification engineers: to write unambiguous tender documents and acceptance conditions for composite post insulators.
• Testing laboratories and certification bodies: to verify mechanical and electrical characteristics against standard tables and normative references.
• Railway electrical engineers: for similar-design post insulators used in traction power stations.

Related standards

• IEC/EN 62231:2006 - definitions, test methods and acceptance criteria for composite station post insulators
• IEC 60815-1 / IEC 60815-3 - selection and dimensioning of high-voltage insulators in polluted conditions (referenced for pollution classes and creepage guidance)

EN 62231-1:2016 provides the dimensional and performance baseline required to ensure safe, durable and interoperable composite station post insulators in substations up to 245 kV.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2016
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9LQQHSUHVHJDMRN9GHO'LPHQ]LMVNHPHKDQVNHLQHOHNWULþQH
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Composite station post insulators for substations with AC voltages greater than 1 000 v
up to 245 kv - Part 1: Dimensional, mechanical and electrical characteristics (IEC 62231-
1:2015)
Verbund-Stationsstützisolatoren für Unterwerke für Wechselspannungen größer 1 000 V
bis einschließlich 245 kV - Teil 1: Maßliche, mechanische und elektrische Eigenschaften
(IEC 62231-1:2015)
Supports isolants composites destinés aux postes à courant alternatif de tensions
supérieures à 1 000 V jusqu'à 245 kV - Partie 1: Caractéristiques dimensionnelles,
mécaniques et électriques (IEC 62231-1:2015)
Ta slovenski standard je istoveten z: EN 62231-1:2016
ICS:
29.080.10 Izolatorji Insulators
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 62231-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2016
ICS 29.080.10
English Version
Composite station post insulators for substations with AC
voltages greater than 1 000 V up to 245 kV -
Part 1: Dimensional, mechanical and electrical characteristics
(IEC 62231-1:2015)
Supports isolants composites destinés aux postes à courant Verbund-Stationsstützisolatoren für Unterwerke für
alternatif de tensions supérieures à 1 000 V jusqu'à 245 kV - Wechselspannungen größer 1 000 V bis einschließlich
Partie 1: Caractéristiques dimensionnelles, mécaniques et 245 kV - Teil 1: Maßliche, mechanische und elektrische
électriques Eigenschaften
(IEC 62231-1:2015) (IEC 62231-1:2015)
This European Standard was approved by CENELEC on 2015-11-17. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 62231-1:2016 E
European foreword
The text of document 36/372/FDIS, future edition 1 of IEC 62231-1, prepared by IEC/TC 36
"Insulators" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
(dop) 2016-08-17
• latest date by which the document has to be implemented at
national level by publication of an identical national
standard or by endorsement
(dow) 2018-11-17
• latest date by which the national standards conflicting with
the document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 62231-1:2015 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated :
IEC 60060-1 NOTE Harmonized as EN 60060-1.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is
available here: www.cenelec.eu.

Publication Year Title EN/HD Year
IEC/TS 60815-1 2008 Selection and dimensioning of high- - -
voltage insulators intended for use in
polluted conditions -
Part 1: Definitions, information and
general principles
IEC/TS 60815-3 -  Selection and dimensioning of high- - -
voltage insulators intended for use in
polluted conditions -
Part 3: Polymer insulators for a.c.
systems
IEC 62231 2006 Composite station post insulators for EN 62231 2006
substations with a.c. voltages greater
than 1 000 V up to 245 kV - Definitions,
test methods and acceptance criteria

IEC 62231-1 ®
Edition 1.0 2015-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Composite station post insulators for substations with AC voltages greater than

1 000 V up to 245 kV –
Part 1: Dimensional, mechanical and electrical characteristics

Supports isolants composites destinés aux postes à courant alternatif de

tensions supérieures à 1 000 V jusqu’à 245 kV –

Partie 1: Caractéristiques dimensionnelles, mécaniques et électriques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.080.10 ISBN 978-2-8322-2964-4

– 2 – IEC 62231-1:2015 © IEC 2015
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Mechanical and dimensional characteristics . 7
5 Electrical characteristics . 7
6 Designation . 7
7 Marking . 8
8 Tolerances . 8
9 Metal fitting arrangements . 8
Bibliography . 15

Table 1a – Designation and characteristics of composite station post insulators (ref
IEC 60273 Table IV) for IEC 60815-1 class c . 9
Table 1b – Designation and characteristics of composite station post insulators (ref
IEC 60273 Table IV) for IEC 60815-1 class d . 11
Table 2 – Designation and characteristics of composite station post insulators North
American Practice / ANSI . 13

IEC 62231-1:2015 © IEC 2015 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
COMPOSITE STATION POST INSULATORS
FOR SUBSTATIONS WITH AC VOLTAGES GREATER
THAN 1 000 V UP TO 245 kV –
Part 1: Dimensional, mechanical and electrical characteristics

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,
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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
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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
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
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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
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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
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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 62231-1 has been prepared by IEC technical committee 36:
Insulators.
The text of this standard is based on the following documents:
FDIS Report on voting
36/372/FDIS 36/373/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 – IEC 62231-1:2015 © IEC 2015
A list of all parts in the IEC 62231 series, published under the general title Composite station
post insulators for substations with a.c. voltages greater than 1 000 V up to 245 kV, 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.
IEC 62231-1:2015 © IEC 2015 – 5 –
COMPOSITE STATION POST INSULATORS
FOR SUBSTATIONS WITH AC VOLTAGES GREATER
THAN 1 000 V UP TO 245 kV –
Part 1: Dimensional, mechanical and electrical characteristics

1 Scope
This part of IEC 62231 is applicable to composite station post insulators for substations with
a.c. voltages greater than 1 000 V up to 245 kV.
It also applies to composite station post insulators of similar design used in power stations of
railway systems.
This part of IEC 62231 specifies main dimensions and values for mechanical and electrical
characteristics of composite station post insulators.
NOTE The composite station post insulators covered by this standard are primarily intended for outdoor service,
but can also be used indoor.
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 60815-1:2008, Selection and dimensioning of high-voltage insulators intended for use in
polluted conditions – Part 1: Definitions, information and general principles
IEC 60815-3, Selection and dimensioning of high-voltage insulators intended for use in
polluted conditions – Part 3: Polymer insulators for a.c. systems
IEC 62231:2006, Composite station post insulators for substations with a.c. voltages greater
than 1 000 V up to 245 kV – Definitions, test methods and acceptance criteria
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
composite station post insulator
post insulator consisting of a solid load bearing cylindrical insulating core, a housing and end
fittings attached to the insulating core
[SOURCE: IEC 62231:2006, 3.1]
3.2
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

– 6 – IEC 62231-1:2015 © IEC 2015
Note 1 to entry: The surface of cement or of any other non-insulating jointing material is not considered as
forming part of the creepage distance.
Note 2 to entry: 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.
[SOURCE: IEC 60050-471:2007, 471-01-04]
3.3
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 1 to entry: Where the end fitting is metallic, the term “metal fitting” is normally used.
[SOURCE: IEC 60050-471:2007, 471-01-06]
3.4
maximum design cantilever load
MDCL
cantilever load level above which damage to the insulator begins to occur and that should not
be exceeded in service
[SOURCE: IEC 62231:2006, 3.18]
3.5
specified cantilever load
SCL
cantilever load which can be withstood by the insulator when tested under the prescribed
conditions
[SOURCE: IEC 62231:2006, 3.17]
3.6
specified compression load
SCoL
compression load which can be withstood by the insulator when tested under the prescribed
conditions
[SOURCE: IEC 62231:2006, 3.25]
3.7
specified tension load
STL
tension load which can be withstood by the insulator when tested under the prescribed
conditions
[
...