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

This International Standard applies to composite station post insulators consisting of a load bearing cylindrical insulating solid core made of resin impregnated fibres, a housing (outside the insulating solid core) made of elastomer material (e.g. silicone or ethylene-propylene) and end fittings attached to the insulating core. Composite station post insulators covered by this standard are subjected to cantilever, torsion, tension and compression loads. They are intended for substations with a.c. voltages greater than 1 000 V up to 245 kV.

Isolateurs supports composites rigides à socle destinés aux postes à courant alternatif de tensions supérieures à 1 000 V jusqu'à 245 kV - Définitions, méthodes d'essai et critères d'acceptation

La présente Norme internationale s'applique aux supports isolants composites rigides à socle constitués d'un noyau isolant plein cylindrique supportant les charges mécaniques réalisé en fibres imprégnées de résine, d'un revêtement (à l'extérieur du noyau plein isolant) réalisée en matériau élastomère (par exemple du silicone ou de l'éthylène-propylène) et des armatures d'extrémité fixées au noyau isolant. Les supports isolants composites rigides à socle relevant de la présente norme sont soumis aux charges de flexion, de torsion, de traction et de compression. Ils sont destinés aux postes à courant alternatif de tensions supérieures à 1 000 V jusqu'à 245 kV.

General Information

• Status: Published
• Publication Date: 06-Feb-2006
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.080.10 - Insulators
• Technical Committee: TC 36 - Insulators
• Current Stage: PPUB - Publication issued
• Start Date: 31-May-2006
• Completion Date: 07-Feb-2006

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD 62231
First edition
2006-02
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
Reference number
Publication numbering
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INTERNATIONAL IEC
STANDARD 62231
First edition
2006-02
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
 IEC 2006  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: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale V
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue

– 2 – 62231  IEC:2006(E)
CONTENTS
FOREWORD.4
INTRODUCTION.6

1 Scope and object.7
2 Normative references .7
3 Terms and definitions .8
4 Identification.11
5 Environmental conditions.11
6 Information on transport, storage and installation .12
7 Classification of tests .12
7.1 Design tests .12
7.2 Type tests .13
7.3 Sample tests .13
7.4 Routine tests .13
8 Design tests .14
8.1 General .14
8.2 Tests on interfaces and connections of end fittings.14
8.3 Assembled core load tests.15
8.4 Tests on shed and housing material .16
8.5 Tests on the core material .17
9 Type tests .17
9.1 Verification of dimensions .17
9.2 Electrical tests.17
9.3 Mechanical tests .19
10 Sample tests .20
10.1 General rules .20
10.2 Verification of dimensions (E1 + E2).21
10.3 Galvanizing test (E1 + E2).21
10.4 Verification of the specified mechanical loads (E1) .21
10.5 Re-testing procedure.22
11 Routine tests .22
11.1 Identification of the station post insulator .22
11.2 Visual examination .22
11.3 Tensile load test.22

Annex A (informative) Notes on the mechanical loads and tests .24
Annex B (informative) Determination of the equivalent bending moment caused by
combined cantilever and compression (tension) loads.26
Annex C (informative) Example of torsion load test arrangement .28
Annex D (normative) Tolerances of form and position .29
Annex E (informative) Notes on the compression and buckling test.32

Bibliography.33

62231  IEC:2006(E) – 3 –
Figure 1 – Thermal-mechanical pre-stressing test – Typical cycles .23
Figure B.1 – Combined loads applied to station post insulators.27
Figure D.1 – Parallelism, coaxiality and concentricity.29
Figure D.2 – Angular deviation of fixing holes: Example 1.30
Figure D.3 – Angular deviation of fixing holes: Example 2.30
Figure D.4 – Tolerances according to standard drawing practice.31

Table 1 – Tests to be carried out after design changes .12

– 4 – 62231  IEC:2006(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
COMPOSITE STATION POST INSULATORS FOR SUBSTATIONS
WITH AC VOLTAGES GREATER THAN 1000 V UP TO 245 kV –
DEFINITIONS, TEST METHODS AND ACCEPTANCE CRITERIA

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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International Standard IEC 62231 has been prepared by subcommittee 36C: Insulators for
substations, of IEC technical committee 36: Insulators.
The text of this standard is based on the following documents:
FDIS Report on voting
36C/159/FDIS 36C/160/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.
This standard is to be read in conjunction with IEC 62217.

62231  IEC:2006(E) – 5 –
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.

– 6 – 62231  IEC:2006(E)
INTRODUCTION
Composite station post insulators consist of a cylindrical solid insulating core made of resin
impregnated fibres, bearing the mechanical load, protected by an elastomer housing, the
loads being transmitted to the core by metal fittings. Despite these common features, the
materials used and the construction details employed by different manufacturers may be
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 performed in order to eliminate insulator
designs, materials and manufacturing technologies not suitable for high-voltage applications.
The influence of time on the electrical and mechanical properties of the complete composite
station post insulator and its components (core material, housing material, interfaces, etc.)
has been considered in specifying the design tests in order to ensure a satisfactory lifetime
under normal service conditions.
The approach for mechanical testing under bending loads used in this Standard is based on
IEC 61952. This approach uses the concept of a damage limit that is the maximum stress that
can be developed in the insulator before damage begins to occur. Work is underway to
validate the acoustic emission technique to determine the inception of damage.
In some cases, station post insulators can be subjected to a combination of loads. In order to
giv
...

IEC 62231
Edition 1.0 2006-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
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

Isolateurs supports composites rigides à socle destinés aux postes à courant
alternatif de tensions supérieures à 1 000 V jusqu’à 245 kV – Définitions,
méthodes d’essai et critères d’acceptation

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IEC 62231
Edition 1.0 2006-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
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

Isolateurs supports composites rigides à socle destinés aux postes à courant
alternatif de tensions supérieures à 1 000 V jusqu’à 245 kV – Définitions,
méthodes d’essai et critères d’acceptation

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
W
CODE PRIX
ICS 29.080.10 ISBN 2-8318-8562-0
– 2 – 62231  CEI:2006
SOMMAIRE
AVANT-PROPOS.6
INTRODUCTION.10

1 Domaine d’application et objet.14
2 Références normatives.14
3 Termes et définitions .16
4 Identification.22
5 Conditions d'environnement .24
6 Informations relatives au transport, au stockage et à l’installation .24
7 Classification des essais .24
7.1 Essais de conception .24
7.2 Essais de type.28
7.3 Essais sur prélèvement .28
7.4 Essais individuels.28
8 Essais de conception.28
8.1 Généralités.28
8.2 Essais sur les interfaces et connexions des armatures d’extrémité.30
8.3 Essais de charge du noyau assemblé.30
8.4 Essais du matériau des ailettes et du revêtement.36
8.5 Essais du matériau du noyau.36
9 Essais de type.36
9.1 Vérification des dimensions.36
9.2 Essais électriques .36
9.3 Essais mécaniques.40
10 Essais sur prélèvements.44
10.1 Règles générales .44
10.2 Vérification des dimensions (E1 + E2) .44
10.3 Vérification de la galvanisation (E1 + E2) .44
10.4 Vérification des charges mécaniques spécifiées (E1) .46
10.5 Procédure pour un nouvel essai .46
11 Essais individuels.48
11.1 Identification du support isolant rigide à socle .48
11.2 Examen visuel.48
11.3 Essai de la charge de traction .48

Annexe A (informative) Notes sur les charges et essais mécaniques .52
Annexe B (informative) Détermination du moment de flexion équivalent causé par des
charges de (traction) de compression et de flexion combinées.56
Annexe C (informative) Exemple de montage d’essai de charge de torsion.60
Annexe D (normative) Tolérances de forme et de position .62
Annexe E (informative) Notes sur l’essai de compression et de flambage .68

Bibliographie.70

62231  IEC:2006 – 3 –
CONTENTS
FOREWORD.7
INTRODUCTION.11

1 Scope and object.15
2 Normative references .15
3 Terms and definitions .17
4 Identification.23
5 Environmental conditions.25
6 Information on transport, storage and installation .25
7 Classification of tests .25
7.1 Design tests .25
7.2 Type tests .29
7.3 Sample tests .29
7.4 Routine tests .29
8 Design tests .29
8.1 General .29
8.2 Tests on interfaces and connections of end fittings.31
8.3 Assembled core load tests.31
8.4 Tests on shed and housing material .37
8.5 Tests on the core material .37
9 Type tests .37
9.1 Verification of dimensions .37
9.2 Electrical tests.37
9.3 Mechanical tests .41
10 Sample tests .45
10.1 General rules .45
10.2 Verification of dimensions (E1 + E2).45
10.3 Galvanizing test (E1 + E2).45
10.4 Verification of the specified mechanical loads (E1) .47
10.5 Re-testing procedure.47
11 Routine tests .49
11.1 Identification of the station post insulator .49
11.2 Visual examination .49
11.3 Tensile load test.49

Annex A (informative) Notes on the mechanical loads and tests .53
Annex B (informative) Determination of the equivalent bending mom
...