SIST EN IEC 60305:2021

Insulators for overhead lines with a nominal voltage above 1000 V - Ceramic or glass insulator units for AC systems - Characteristics of insulator units of the cap and pin type (IEC 60305:2021)

This International Standard applies to string insulator units of the cap and pin type with
insulating parts of ceramic material or glass, intended for AC overhead lines with a nominal
voltage greater than 1 000 V and a frequency not greater than 100 Hz. It also applies to
insulators of similar design used in substations.
This document applies to string insulator units of the cap and pin type either with ball and
socket couplings or with clevis and tongue couplings.
This document applies to string insulator units for use on overhead lines in clean areas and
polluted areas. For use in areas characterized by very heavy pollution levels and for other
particular or extreme environmental conditions, it may be necessary for certain dimensions to
be changed and insulator units having different creepage distances, spacing and forms may
be preferred (for example, flat profile, hemispherical etc.). Insulators for use on DC systems
may also need different dimensions. In any case, it is applicable that the standardized
mechanical characteristics of this document and coupling sizes are retained.
The object of this document is to prescribe specified values for the mechanical characteristics
and for the main dimensions of string insulator units of the cap and pin type.
The power frequency, lightning impulse and puncture withstand voltages of string insulator
units are not specified in this document. IEC 60383-1 gives the electrical characteristics which
define string insulator units; their values are agreed between purchaser and manufacturer.
Ball and socket couplings are covered by IEC 60120, clevis and tongue couplings by
IEC 60471.
NOTE For the definition of site pollution severity see IEC TS 60815-1.

Isolatoren für Freileitungen mit einer Nennspannung über 1000 V – Keramik- oder Glas-Kettenisolatoren für Wechselstromsysteme – Kenngrößen von Kettenisolatoren vom Typ Kappenisolator (IEC 60305:2021)

Isolateurs pour lignes aériennes de tension nominale supérieure à 1000 V - Eléments d'isolateurs en matière céramique ou en verre pour systèmes à courant alternatif - Caractéristiques des éléments d'isolateurs du type capot et tige (IEC 60305:2021)

L'IEC 60305:2021 s'applique aux éléments de chaînes d'isolateurs du type à capot et tige ayant des parties isolantes en matière céramique ou en verre et destinés aux lignes aériennes fonctionnant en courant alternatif à une tension nominale supérieure à 1 000 V et à une fréquence au plus égale à 100 Hz. Elle s'applique également aux isolateurs du même type utilisés dans les postes. Le présent document s'applique aux éléments de chaînes d'isolateurs du type à capot et tige soit avec assemblage à rotule, soit avec assemblage à chape et tenon. Le présent document s'applique aux éléments de chaînes d'isolateurs destinés aux lignes aériennes situées dans des régions polluées et non polluées. Pour les isolateurs destinés à être utilisés dans des régions très fortement polluées et dans d'autres conditions environnementales particulières ou extrêmes, il peut être nécessaire de modifier certaines dimensions et il peut être préférable d'utiliser des éléments d'isolateurs ayant des lignes de fuite, des pas et des formes différentes (par exemple, profil plat, hémisphérique, etc.). Les isolateurs destinés à être utilisés sur les réseaux à tension continue peuvent également nécessiter des dimensions différentes. Dans tous les cas, il est possible de retenir les caractéristiques mécaniques normalisées du présent document et les dimensions d'assemblage. Cette cinquième édition annule et remplace la quatrième édition parue en 1995. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- reformulation du domaine d'application: "il est recommandé d’utiliser" a été remplacé par "il est possible de retenir";
- ajout de nouvelles références normatives;
- spécification à l'Article 4 de la charge de rupture électromécanique ou mécanique;
- ajout de nouvelles figures représentant des profils.

Izolatorji za nadzemne vode za nazivne napetosti nad 1000 V - Keramični ali stekleni izolatorski členi za izmenične sisteme - Karakteristike izolatorskih členov za kapaste izolatorje (IEC 60305:2021)

General Information

• Status: Published
• Publication Date: 07-Oct-2021
• ICS: 29.080.10 - Insulators
• ICS: 29.240.20 - Power transmission and distribution lines
• Technical Committee: IZL - Insulators
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 03-Mar-2021
• Due Date: 08-May-2021
• Completion Date: 08-Oct-2021
• Ref Project: EN IEC 60305:2021 - Insulators for overhead lines with a nominal voltage above 1000 V - Ceramic or glass insulator units for AC systems - Characteristics of insulator units of the cap and pin type

Relations

• Replaces: SIST EN 60305:1997 - Insulators for overhead lines with a nominal voltage above 1 kV - Ceramic or glass insulator units for a.c. systems - Characteristics of insulator units of the cap and pin type
• Effective Date: 02-Mar-2021

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN IEC 60305:2021
01-november-2021
Nadomešča:
SIST EN 60305:1997
Izolatorji za nadzemne vode za nazivne napetosti nad 1000 V - Keramični ali
stekleni izolatorski členi za izmenične sisteme - Karakteristike izolatorskih členov
za kapaste izolatorje (IEC 60305:2021)
Insulators for overhead lines with a nominal voltage above 1000 V - Ceramic or glass
insulator units for AC systems - Characteristics of insulator units of the cap and pin type
(IEC 60305:2021)
Isolatoren für Freileitungen mit einer Nennspannung über 1000 V – Keramik- oder Glas-
Kettenisolatoren für Wechselstromsysteme – Kenngrößen von Kettenisolatoren vom Typ
Kappenisolator (IEC 60305:2021)
Isolateurs pour lignes aériennes de tension nominale supérieure à 1000 V - Eléments
d'isolateurs en matière céramique ou en verre pour systèmes à courant alternatif -
Caractéristiques des éléments d'isolateurs du type capot et tige (IEC 60305:2021)
Ta slovenski standard je istoveten z: EN IEC 60305:2021
ICS:
29.080.10 Izolatorji Insulators
29.240.20 Daljnovodi Power transmission and
distribution lines
SIST EN IEC 60305:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 60305:2021

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SIST EN IEC 60305:2021


EUROPEAN STANDARD EN IEC 60305

NORME EUROPÉENNE

EUROPÄISCHE NORM
February 2021
ICS 29.080.10; 29.240.20 Supersedes EN 60305:1996 and all of its amendments
and corrigenda (if any)
English Version
Insulators for overhead lines with a nominal voltage above
1 000 V - Ceramic or glass insulator units for AC systems -
Characteristics of insulator units of the cap and pin type
(IEC 60305:2021)
Isolateurs pour lignes aériennes de tension nominale  Isolatoren für Freileitungen mit einer Nennspannung über
supérieure a 1 000 V - Éléments d'isolateurs en céramique 1000 V – Keramik- oder Glas-Kettenisolatoren für
ou en verre pour réseaux à tension alternative - Wechselstromsysteme – Kenngrößen von Kettenisolatoren
Caractéristiques des éléments d'isolateurs du type capot et vom Typ Kappenisolator
tige (IEC 60305:2021)
(IEC 60305:2021)
This European Standard was approved by CENELEC on 2021-02-15. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 60305:2021 E

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SIST EN IEC 60305:2021
EN IEC 60305:2021 (E)
European foreword
The text of document 36/499/FDIS, future edition 5 of IEC 60305, prepared by IEC/TC 36 "Insulators"
was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
EN IEC 60305:2021.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-11-15
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024-02-15
document have to be withdrawn
This document supersedes EN 60305:1996 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 60305:2021 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60120:2020 NOTE Harmonized as EN IEC 60120:2020 (not modified)
IEC 60471:2020 NOTE Harmonized as EN IEC 60471:2020 (not modified)
2

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SIST EN IEC 60305:2021
EN IEC 60305:2021 (E)
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
NOTE 1 Where 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 60383-1 - Insulators for overhead lines with a EN 60383-1 -
nominal voltage above 1000 V - Part 1:
Ceramic or glass insulator units for a.c.
systems - Definitions, test methods and
acceptance criteria

3

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SIST EN IEC 60305:2021

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SIST EN IEC 60305:2021



IEC 60305

®


Edition 5.0 2021-01




INTERNATIONAL



STANDARD




NORME


INTERNATIONALE











Insulators for overhead lines with a nominal voltage above 1 000 V – Ceramic or

glass insulator units for AC systems – Characteristics of insulator units of the

cap and pin type



Isolateurs pour lignes aériennes de tension nominale supérieure a 1 000 V –

Éléments d’isolateurs en céramique ou en verre pour réseaux à tension


alternative – Caractéristiques des éléments d'isolateurs du type capot et tige













INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 29.080.10; 29.240.20 ISBN 978-2-8322-9203-7




Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN IEC 60305:2021
– 2 – IEC 60305:2021 © IEC 2021
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Mechanical characteristics, dimensions and types . 6
5 Designation and marking with respect to shed profile . 6
6 Tolerances . 8
Bibliography . 14

Figure 1 – Typical "standard" profile . 7
Figure 2 – Typical "anti-fog" profile "P" . 7
Figure 3 – Typical "aerodynamic" profile "D" . 7
Figure 4 – Typical "two-alternating" profile "V" . 7
Figure 5 – Typical "three-alternating" profile "T" . 8
Figure 6 – String insulator unit of standard and anti-fog profile with ball and socket
coupling . 8
Figure 7 – String insulator unit of standard and anti-fog profile with clevis and tongue
coupling . 10
Figure 8 – String insulator unit of aerodynamic profile with ball and socket coupling . 11
Figure 9 – String insulator unit of two-alternating profile with ball and socket coupling . 11
Figure 10 – String insulator unit of three-alternating profile with ball and socket
coupling . 12

Table 1 – Specified values of mechanical and dimensional characteristics for string
insulator units of standard and anti-fog profile with ball and socket couplings . 9
Table 2 – Specified values of mechanical and dimensional characteristics for string
insulator units of standard and anti-fog profile with clevis and tongue couplings . 10
Table 3 – Specified values of mechanical and dimensional characteristics for string
insulator units of aerodynamic profile with ball and socket couplings . 11
Table 4 – Specified values of mechanical and dimensional characteristics for string
insulator units of two-alternating profile with ball and socket couplings . 12
Table 5 – Specified values of mechanical and dimensional characteristics for string
insulator units of three-alternating profile with ball and socket couplings . 13

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SIST EN IEC 60305:2021
IEC 60305:2021 © IEC 2021 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

INSULATORS FOR OVERHEAD LINES WITH
A NOMINAL VOLTAGE ABOVE 1 000 V –
CERAMIC OR GLASS INSULATOR UNITS FOR AC SYSTEMS –
CHARACTERISTICS OF INSULATOR UNITS OF THE CAP AND PIN TYPE

FOREWORD
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