SIST EN IEC 60372:2020
(Main)Locking devices for ball and socket couplings of string insulator units - Dimensions and tests (IEC 60372:2020)
Locking devices for ball and socket couplings of string insulator units - Dimensions and tests (IEC 60372:2020)
This international standard is applicable to locking devices used with ball and socket
couplings of string insulator units and used with the corresponding metal fittings standardized
in IEC 60120, when they are supplied separately.
When these locking devices are supplied with an insulator or fitting, they are considered as an
integral part of it. In this case, the relevant test is to be included with those of insulators, as
specified in IEC 60383-1 and IEC 61325. On request, a certificate is to be delivered
confirming that the tests on locking devices as specified in this document have been carried
out. The locking devices are usually supplied with the insulator or corresponding metal fittings.
The object of this document is
• to define the shapes and some standard dimensions for locking devices,
• to define the test methods for locking devices,
• to state the acceptance conditions for supply,
• to give other dimensions for guidance of manufacturing only.
The object of this document does not include the specification of the nature of the material,
and the material covered by the scope of this document does not have a surface coating for
corrosion protection. However, the material which will give rise to significant contact
corrosion(chemical reaction) between the locking device and the ball and socket coupling
does not covered by this document.
Sicherungsvorrichtungen für Klöppel- und Pfannenverbindungen von Kettenisolatoren - Maße und Prüfungen (IEC 60372:2020)
Dispositifs de verrouillage pour les assemblages à rotule et logement de rotule des éléments de chaînes d'isolateurs - Dimensions et essais (IEC 60372:2020)
l’IEC 60372:2020 est applicable aux dispositifs de verrouillage utilisés avec les assemblages à rotule des éléments de chaînes d'isolateurs et utilisés avec les accessoires métalliques correspondants normalisés dans l’IEC 60120, lorsqu'ils sont livrés séparément. Le présent document a pour objet:
- de définir les formes et certaines dimensions normalisées des dispositifs de verrouillage,
- de définir les méthodes d'essai des dispositifs de verrouillage,
- de fixer les conditions d'acceptation d'une fourniture,
- de donner d'autres dimensions, uniquement à titre de recommandation pour la fabrication.
Cette quatrième édition annule et remplace la troisième édition parue en 1984. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a. Deux nouvelles tailles d’assemblages normalisées, 36 et 40, sont présentées;
b. le contenu concernant l'agrafe 28B a été supprimé;
c. L’Annexe A est informative, l’Annexe B est normative, l’Annexe C est informative.
Zaklepni mehanizmi za spojke z betičem in ponvico za člene izolatorskih verig - Dimenzije in preskusi (IEC 60372:2020)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN IEC 60372:2020
01-december-2020
Nadomešča:
SIST EN 60372:2004
Zaklepni mehanizmi za spojke z betičem in ponvico za člene izolatorskih verig -
Dimenzije in preskusi (IEC 60372:2020)
Locking devices for ball and socket couplings of string insulator units - Dimensions and
tests (IEC 60372:2020)
Sicherungsvorrichtungen für Klöppel- und Pfannenverbindungen von Kettenisolatoren -
Maße und Prüfungen (IEC 60372:2020)
Dispositifs de verrouillage pour les assemblages à rotule et logement de rotule des
éléments de chaînes d'isolateurs - Dimensions et essais (IEC 60372:2020)
Ta slovenski standard je istoveten z: EN IEC 60372:2020
ICS:
29.080.10 Izolatorji Insulators
SIST EN IEC 60372:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN IEC 60372:2020
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SIST EN IEC 60372:2020
EUROPEAN STANDARD EN IEC 60372
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2020
ICS 29.240.20; 29.080.10 Supersedes EN 60372:2004 and all of its amendments
and corrigenda (if any)
English Version
Locking devices for ball and socket couplings of string insulator
units - Dimensions and tests
(IEC 60372:2020)
Dispositifs de verrouillage pour les assemblages à rotule et Sicherungsvorrichtungen für Klöppel- und
logement de rotule des éléments de chaînes d'isolateurs - Pfannenverbindungen von Kettenisolatoren - Maße und
Dimensions et essais Prüfungen (IEC 60372:2020)
(IEC 60372:2020)
This European Standard was approved by CENELEC on 2020-08-26. 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
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60372:2020 E
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SIST EN IEC 60372:2020
EN IEC 60372:2020 (E)
European foreword
The text of document 36/485/FDIS, future edition 4 of IEC 60372, prepared by IEC/TC 36 "Insulators"
was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
EN IEC 60372:2020.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-05-26
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-08-26
document have to be withdrawn
This document supersedes EN 60372:2004 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 60372:2020 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:
Harmonized as EN IEC 60120:2020 (not modified)
IEC 60120:2020 NOTE
Harmonized as EN 61325:1995 (not modified)
IEC 61325:1995 NOTE
2
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SIST EN IEC 60372:2020
EN IEC 60372:2020 (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 60050-471 - International Electrotechnical Vocabulary - - -
Part 471: Insulators
ISO 6506-1 - Metallic materials - Brinell hardness test - EN ISO 6506-1 -
Part 1: Test method
ISO 6507-1 - Metallic materials – Vickers Hardness – EN ISO 6507-1 -
Test Part 1: Test Method
ISO 6508-1 - Metallic materials – Rockwell Hardness – EN ISO 6508-1 -
Test Part 1: Test Method
3
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SIST EN IEC 60372:2020
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SIST EN IEC 60372:2020
IEC 60372
®
Edition 4.0 2020-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Locking devices for ball and socket couplings of string insulator units –
Dimensions and tests
Dispositifs de verrouillage pour les assemblages à rotule et logement de rotule
des éléments de chaînes d'isolateurs – Dimensions et essais
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.080.10; 29.240.20 ISBN 978-2-8322-8477-3
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
---------------------- Page: 7 ----------------------
SIST EN IEC 60372:2020
– 2 – IEC 60372:2020 © IEC 2020
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Shapes and dimensions . 7
4.1 General . 7
4.2 Shapes of the locking devices . 7
4.2.1 Split-pin . 7
4.2.2 W-clip . 7
4.3 Dimensions of locking devices . 7
4.3.1 The split-pins (standard and alternative type) . 7
4.3.2 The W-clips . 8
5 Test . 9
5.1 Classification of tests . 9
5.2 Qualification tests . 10
5.2.1 Test items and the samples . 10
5.2.2 Hardness test . 10
5.2.3 Verification of resistance of bending . 10
5.2.4 Corrosion resistance test . 11
5.3 Sample tests and sampling . 12
5.3.1 Sample tests . 12
5.3.2 Sampling . 12
5.3.3 Visual examination . 13
5.3.4 Verification of dimensions . 13
5.3.5 Hardness test . 14
5.3.6 Verification of resistance to bending (for split-pins only) . 14
5.4 Re-test procedure . 14
Annex A (normative) Gauge for W-clips . 15
Annex B (normative) Other dimensions of split-pins . 17
Annex C (informative) Method of using the locking devices . 18
C.1 Overview. 18
C.2 Method of using the locking devices – Split-pin . 18
C.3 Method of using the locking devices – W-clip . 18
Bibliography . 19
Figure 1 – Shape of split-pins . 8
Figure 2 – Shape of W-clips . 9
Figure 3 – Arrangement of verification of resistance of bending . 11
Figure 4 – Verification of L . 13
Figure A.1 – Gauge for W-clips . 15
Figure A.2 – Symbol marks for dimensions of W-clips . 16
Figure B.1 – Other dimensions of the split-pins . 17
Figure C.1 – Positions of split-pin . 18
Figure C.2 – Positions of W-clip . 18
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SIST EN IEC 60372:2020
IEC 60372:2020 © IEC 2020 – 3 –
Table 1 – Dimensions of the split-pins . 8
Table 2 – Dimensions of W-clips . 9
Table 3 – Radii of verification of resistance of bending . 11
Table 4 – Size of the sample and acceptance number Ac . 12
Table 5 – Specifications of K and D in Figure 4 . 13
4
Table A.1 – Dimensions of the gauge for W-clips . 16
Table B.1 – Other dimensions of the split-pins . 17
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SIST EN IEC 60372:2020
– 4 – IEC 60372:2020 © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOCKING DEVICES FOR BALL AND SOCKET COUPLINGS
OF STRING INSULATOR UNITS – DIMENSIONS AND TESTS
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 itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
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 60372 has been prepared by IEC technical committee 36:
Insulators.
This fourth edition cancels and replaces the third edition published in 1984. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Two new designated size of couplings, 36 and 40, were introduced;
b) According to the results of the questionnaire (36/424/Q), the relevant content of the 28B
W-clip was deleted;
c) Annex A is informative, Annex B is normative, Annex C is informative.
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SIST EN IEC 60372:2020
IEC 60372:2020 © IEC 2020 – 5 –
The text of this International Standard is based on the following documents:
FDIS Report on voting
36/485/FDIS 36/493/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.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
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.
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SIST EN IEC 60372:2020
– 6 – IEC 60372:2020 © IEC 2020
LOCKING DEVICES FOR BALL AND SOCKET COUPLINGS
OF STRING INSULATOR UNITS – DIMENSIONS AND TESTS
1 Scope
This international standard is applicable to locking devices used with ball and socket
couplings of string insulator units and used with the corresponding metal fittings standardized
in IEC 60120, when they are supplied separately.
When these locking devices are supplied with an insulator or fitting, they are considered as an
integral part of it. In this case, the relevant test is to be included with those of insulators, as
specified in IEC 60383-1 and IEC 61325. On request, a certificate is to be delivered
confirming that the tests on locking devices as specified in this document have been carried
out. The locking devices are usually supplied with the insulator or corresponding metal fittings.
The object of this document is
• to define the shapes and some standard dimensions for locking devices,
• to define the test methods for locking devices,
• to state the acceptance conditions for supply,
• to give other dimensions for guidance of manufacturing only.
The object of this document does not include the specification of the nature of the material,
and the material covered by the scope of this document does not have a surface coating for
corrosion protection. However, the material which will give rise to significant contact
corrosion(chemical reaction) between the locking device and the ball and socket coupling
does not covered by this document.
2
...
SLOVENSKI STANDARD
oSIST prEN IEC 60372:2019
01-december-2019
Zaklepni mehanizmi za spojke z betičem in ponvico za člene izolatorskih verig -
Dimenzije in preskusi
Locking devices for ball and socket couplings of string insulator units - Dimensions and
tests
Sicherungsvorrichtungen für Klöppel- und Pfannen-Verbindungen von Kettenisolatoren -
Maße und Prüfungen
Dispositifs de verrouillage pour les assemblages à rotule et logement de rotule des
éléments de chaînes d'isolateurs - Dimensions et essais
Ta slovenski standard je istoveten z: prEN IEC 60372:2019
ICS:
29.080.99 Drugi standardi v zvezi z Other standards related to
izolacijo insulation
oSIST prEN IEC 60372:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN IEC 60372:2019
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oSIST prEN IEC 60372:2019
36/465/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60372 ED4
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2019-10-04 2019-12-27
SUPERSEDES DOCUMENTS:
36/453/CD,36/461/CC
IEC TC 36 : INSULATORS
SECRETARIAT: SECRETARY:
Australia Ms Manjoo Lalwani
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
TITLE:
Locking devices for ball and socket couplings of string insulator units - Dimensions and tests
PROPOSED STABILITY DATE: 2025
NOTE FROM TC/SC OFFICERS:
Copyright © 2019 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to
download this electronic file, to make a copy and to print out the content for the sole purpose of preparing National
Committee positions. You may not copy or "mirror" the file or printed version of the document, or any part of it, for
any other purpose without permission in writing from IEC.
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oSIST prEN IEC 60372:2019
60372/Ed.4/CDV © IEC(E) 2 36/465/CDV
1 CONTENTS
2
3 FOREWORD . 3
4 1. Scope and object . 5
5 2. Normative references . 5
6 3. Terms and definitions. 6
7 4. Shapes and dimensions . 6
8 5. Tests . 8
9 Annex A (normative) Gauge for W-clips . 14
10 Annex B (normative) Other dimensions of split-pins . 16
11 Annex C (informative) Method of using the locking devices . 17
12 C.1 Method of using the locking devices . 17
13
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oSIST prEN IEC 60372:2019
60372/Ed.4/CDV © IEC(E) 3 36/465/CDV
14 ____________
15
16 LOCKING DEVICES FOR BALL AND SOCKET COUPLINGS OF STRING
17 INSULATOR UNITS: DIMENSIONS AND TESTS
18
19
20 FOREWORD
21 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
22 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
23 international co-operation on all questions concerning standardization in the electrical and electronic fields. To
24 this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
25 Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
26 Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
27 in the subject dealt with may participate in this preparatory work. International, governmental and non-
28 governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
29 with the International Organization for Standardization (ISO) in accordance with conditions determined by
30 agreement between the two organizations.
31 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
32 consensus of opinion on the relevant subjects since each technical committee has representation from all
33 interested IEC National Committees.
34 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
35 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
36 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
37 misinterpretation by any end user.
38 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
39 transparently to the maximum extent possible in their national and regional publications. Any divergence
40 between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
41 the latter.
42 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
43 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
44 services carried out by independent certification bodies.
45 6) All users should ensure that they have the latest edition of this publication.
46 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
47 members of its technical committees and IEC National Committees for any personal injury, property damage or
48 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
49 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
50 Publications.
51 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
52 indispensable for the correct application of this publication.
53 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
54 patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
55 International Standard IEC 60372 has been prepared by IEC technical committee 36: Insulator.
56 This 4th edition cancels and replaces the 3rd edition published in 1984. This edition
57 constitutes a technical revision.
58 This edition includes the following significant technical changes with respect to the previous
59 edition:
60 a) Two new designated size of couplings, 36 and 40 was introduced;
61 b) According to the results of the questionnaire(36/424/Q), the relevant content of the 28B
62 W-clip was deleted;
63 c) Annex A is informative, Annex B is normative, Annex C is informative.
64 The text of this International Standard is based on the following documents:
FDIS Report on voting
XX/XX/FDIS XX/XX/RVD
65
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oSIST prEN IEC 60372:2019
60372/Ed.4/CDV © IEC(E) 4 36/465/CDV
66 Full information on the voting for the approval of this International Standard can be found in
67 the report on voting indicated in the above table.
68 This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
69 The committee has decided that the contents of this document will remain unchanged until the
70 stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
71 the specific document. At this date, the document will be
72 • reconfirmed,
73 • withdrawn,
74 • replaced by a revised edition, or
75 • amended.
76
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oSIST prEN IEC 60372:2019
60372/Ed.4/CDV © IEC(E) 5 36/465/CDV
77 LOCKING DEVICES FOR BALL AND SOCKET COUPLINGS OF STRING
78 INSULATOR UNITS: DIMENSIONS AND TESTS
79
80
81 1 Scope and object
82 This standard is applicable to locking devices used with ball and socket couplings of string
83 insulator units and used with the corresponding metal fittings standardized in IEC 60120,
84 when they are supplied separately.
85 When these locking devices are supplied with an insulator or fitting, they shall be considered
86 as an integral part of it. In this case, the relevant test shall be included with those of
87 insulators, as specified in IEC 60383-1 and IEC 61325. On request, a certificate shall be
88 delivered confirming that the tests on locking devices as specified in this standard have been
89 carried out. The locking devices are usually supplied with the insulator or corresponding metal
90 fittings.
91 The object of this standard is
92 • to define the shapes and some standard dimensions for locking devices,
93 • to define the test methods for locking devices,
94 • to state the acceptance conditions for supply,
95 • to give other dimensions for guidance of manufacturing only.
96 The object of this standard does not include the specification of the nature of the material, but
97 it is recommended that this material does not have a surface coating for corrosion protection.
98 Moreover, the material shall not give rise to significant contact corrosion (chemical reaction)
99 between the locking device and the ball and socket coupling.
100 2 Normative references
101 The following documents are referred to in the text in such a way that some or all of their
102 content constitutes requirements of this document. For dated references, only the edition
103 cited applies. For undated references, the latest edition of the referenced document (including
104 any amendments) applies.
105 IEC 60050-471, International Electrotechnical Vocabulary – Part 471: Insulators
106 IEC 60120, Dimensions of Ball and Socket Couplings of String Insulator Unit
107 IEC 60383-1, Insulators for Overhead Lines with a Nominal Voltage Greater than 1 000 V
108 Part 1: Ceramic or Glass insulator units for a.c. systems – Definitions, Test Methods and
109 Acceptance criteria
110 IEC 61325, Insulators for Overhead Lines with a Nominal Voltage Above 1 000 V Ceramic or
111 Glass insulator units for d.c. systems – Definitions, Test Methods and Acceptance criteria
112 ISO 6506-1, Metallic materials-Brinell Hardness-Test Part 1: Test Method
113 ISO 6507-1, Metallic materials-Vickers Hardness-Test Part 1: Test Method
114 ISO 6508-1, Metallic materials- Rockwell Hardness-Test Part 1: Test Method
115 ISO 2859-1:1999/Amd1:2011, Sampling procedures for inspection by attributes-Part 1:
116 Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
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oSIST prEN IEC 60372:2019
60372/Ed.4/CDV © IEC(E) 6 36/465/CDV
117 3 Terms and definitions
118 For the purposes of this document, the terms and definitions of IEC 60050-471 and the
119 following apply.
120 ISO and IEC maintain terminological databases for use in standardization at the following
121 addresses:
122 • IEC Electropedia: available at http://www.electropedia.org/
123 • ISO Online browsing platform: available at http://www.iso.org/obp
124 3.1
125 locking device (for ball and socket coupling)
126 component which prevents pin ball decoupling from socket, when it is in locking position, by
127 using its shape and material properties
128 NOTE See schematic of locking position in Annex C.
129 4 Shapes and dimensions
130 4.1 General
131 Two types of locking devices are standardized, one using a split-pin, the other a W- shaped
132 clip.
133 The first type requires a circular hole and the second a rectangular hole.
134 Two split-pins are proposed.
135 • standard split-pin this split-pin is a tight-fit in the socket-hole,
136 • alternative split-pin this split-pin is a loose fit in the socket-hole.
137 NOTE This alternative may be used by agreement between the manufacturer and the purchaser when the problems
138 of stress corrosion are possible for the split-pin metal due to the permanent stress in the tight-fit system, e.g. when
139 certain types of stainless steel are used.
140 The socket-hole into which the locking device fits is the same of both the standard and
141 alternative split-pin, so it is possible to use the alternative split-pin in a socket designed for
142 the standard split-pin.
143 4.2 Shapes of the locking devices
144 4.2.1 Split-pin
145 One of the legs of the split-pin has a hump and the free ends are bent outwards after insertion
146 into the socket. These features provide two distinct positions for the split-pin when operated
147 for locking and coupling, and complete withdrawal from the socket is effectively prevented
148 (see Annex C).
149 4.2.2 W-clip
150 The W-clip is so shaped that it will remain in two distinct positions when operated for coupling
151 and locking. The shape of the W-clip is such that complete withdrawal from the socket when
152 moving from the locking to the coupling position is prevented (see Annex C).
153 4.3 Dimensions of locking devices
154 4.3.1 The split-pins (standard and alternative type)
155 The shape of split-pins is given in Figure 1. The dimensions of split-pins are given in Table 1.
156
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oSIST prEN IEC 60372:2019
60372/Ed.4/CDV © IEC(E) 7 36/465/CDV
157
158 Figure 1 –Shape of split-pins
159 Table 1 –Dimensions of the split-pins
Alternative split-
Standard split-pins
1)
pins
Designated size
of coupling
′
S T R F R L F
2 2Min. Min. Min. 2 Max.
mm mm mm mm mm mm
mm
+0,2
2,2± 0,1 4,8
11 3,3 8,2 2,5 29 7,3
0
3) +0,2 2）
5,5
A 3,8 10,3 43 9,2
0
16 3,2± 0,1 3,0
3) +0,2
B 7,9 4,8 10,7 38 9,7
0
+0,2
3,2± 0,1
20 7,0 4,8 10,7 3,0 49 9,7
0
+0,2
24 4,0± 0,1 8,7 5,7 12,8 3,5 60 11,7
0
+0,2
28 4,5± 0,1 10,0 6,2 13,8 3,5 71 12,7
0
+0,2
32 5,2± 0,1 11,5 7,2 15,8 3,5 81 14,7
0
+0,2
6,5± 0,1 11,5
36 8,7 17,8 4,0 91 16,7
0
+0,2
6,5± 0,1
40 11,5 8,7 17,8 4,0 102 16,7
0
1) All the dimensions are the same as for standard split-pins, except the value F replaced by F′.
2 2
2) Many existing designs of the inside of the socket still prevent uncoupling with lower values of L . In
min
this case L can be reduced to 38mm.
min.
3) See NOTE 2 of Clause 6 in IEC 60120.
160 The dimension L shall be specified by the purchaser of the split-pin (see 5.3.4.1)
max.
161 4.3.2 The W-clips
162 The shape of W-clips is given in Figure
...
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