IEC 61952-1:2019

IEC 61952-1 ®
Edition 1.0 2019-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Insulators for overhead lines – Composite line post insulators for AC systems
with a nominal voltage greater than 1 000 V –
Part 1: definitions, end fittings and designations

Isolateurs pour lignes aériennes – Isolateurs composites rigides à socle
pour systèmes à courant alternatif de tension nominale supérieure à 1 000 V –
Partie 1: Définitions, armatures d’extrémité et désignations

IEC 61952-1:-2019-04(en-fr)
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IEC 61952-1 ®
Edition 1.0 2019-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Insulators for overhead lines – Composite line post insulators for AC systems

with a nominal voltage greater than 1 000 V –

Part 1: definitions, end fittings and designations

Isolateurs pour lignes aériennes – Isolateurs composites rigides à socle

pour systèmes à courant alternatif de tension nominale supérieure à 1 000 V –

Partie 1: Définitions, armatures d’extrémité et désignations

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.080.10; 29.240.20 ISBN 978-2-8322-7993-9

– 2 – IEC 61952-1:2019 © IEC 2019
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Mechanical, dimensional and electrical characteristics . 7
Characteristics . 7
Maximum design cantilever load (MDCL) and specified cantilever load (SCL) . 8
Minimum lightning impulse withstand voltage class (BIL) . 8
Standard coupling codes . 8
Standard base-plate codes . 18
5 Line post insulator designation . 22
6 Marking . 23
Bibliography . 32

Table 1 – Types of couplings . 9
Table 2 – Types of base plates . 19
Table 3 – Designation and characteristic of composite Line post insulators (IEC
practice) for IEC 60815-3, Class b . 24
Table 4 – Designation and characteristic of composite line post insulators (ANSI
practice) . 28

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INSULATORS FOR OVERHEAD LINES – COMPOSITE LINE
POST INSULATORS FOR AC SYSTEMS WITH A NOMINAL
VOLTAGE GREATER THAN 1 000 V –

Part 1: Definitions, end fittings and designations

FOREWORD
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International Standard IEC 61952-1 has been prepared by IEC technical committee 36:
Insulators.
This bilingual version (2020-04) corresponds to the monolingual English version, published in
2019-04.
The text of this standard is based on the following documents:
FDIS Report on voting
36/435/FDIS 36/441/RVD
Full information on the voting for the approval of this International Standard can be found in the
report on voting indicated in the above table.
The French version of this standard has not been voted upon.

– 4 – IEC 61952-1:2019 © IEC 2019
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 61952 series, published under the general title Insulators for
overhead lines – Composite line post insulators for AC systems with a nominal voltage greater
than 1 000 V, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
INTRODUCTION
This part of IEC 61952 is intended to give the main mechanical and dimensional characteristics
of composite line post insulators and their fittings in order to ensure their interchangeability.
Since line post insulators are usually subjected to combined loads (for example vertical due to
the conductor plus compressive and lateral due to the pole being at a line corner or turn), only
the MDCL is given as a specified characteristic for the mechanical strength of the insulator.
Furthermore, composite line post insulators are often used in a braced configuration for higher
voltages and mechanical loads. In these configurations the overall strength depends on the
components and geometry of the whole assembly – including notably the buckling strength of
the line post component which depends more on the core dimensions and flexibility than on
ultimate flexural strength.
In order to address the matter of the strength of composite line post insulators under combined
or complex loads some information is already give
...