IEC TR 62271-301:2009

IEC/TR 62271-301 ®
Edition 2.0 2009-09
TECHNICAL
REPORT
RAPPORT
TECHNIQUE
High-voltage switchgear and controlgear –
Part 301: Dimensional standardisation of high-voltage terminals

Appareillage à haute tension –
Partie 301: Normalisation dimensionnelle des bornes à haute tension

IEC/TR 62271-301:2009
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IEC/TR 62271-301 ®
Edition 2.0 2009-09
TECHNICAL
REPORT
RAPPORT
TECHNIQUE
High-voltage switchgear and controlgear –
Part 301: Dimensional standardisation of high-voltage terminals

Appareillage à haute tension –
Partie 301: Normalisation dimensionnelle des bornes à haute tension

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
H
CODE PRIX
ICS 29.130.10 ISBN 978-2-88910-658-5
– 2 – TR 62271-301 © IEC:2009
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

Part 301: Dimensional standardisation of high-voltage terminals

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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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
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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
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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.
The main task of IEC technical committees is to prepare International Standards. However, a
technical committee may propose the publication of a technical report when it has collected
data of a different kind from that which is normally published as an International Standard, for
example "state of the art".
IEC 62271-301, which is a technical report, has been prepared by subcommittee 17A: High-
voltage switchgear and controlgear, of IEC technical committee 17: Switchgear and
controlgear.
This second edition cancels and replaces the first edition published in 2004 and constitutes a
technical revision.
The main changes with respect to the previous edition are the addition of Clause 2, Terms
and definitions, as well as Figures 2 through 7.

TR 62271-301 © IEC:2009 – 3 –
The text of this technical report is based on the following documents:
Enquiry draft Report on voting
17A/873/DTR 17A/882/RVC
Full information on the voting for the approval of this technical report 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.
A list of all parts of IEC 62271series, published under general title High-voltage switchgear
and controlgear, can be found on the IEC website.
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.
– 4 – TR 62271-301 © IEC:2009
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

Part 301: Dimensional standardisation of high-voltage terminals

1 Scope
This technical report applies to high-voltage switchgear and controlgear such as circuit-
breakers, disconnectors and switches. However, its application to other equipment is not
excluded. No coordination between dimensions and the rated normal current can be given.
2 Terms and definitions
For the purposes of this document, the following terms and definition apply.
2.1
high-voltage (HV) terminal
conductive part of switchgear and controlgear to which a terminal connector is fastened
2.2
terminal connector
part that joins a conductor to a HV terminal
3 HV terminals with cylindrical shape
The following dimensions are recommended (see Figure 1):

TR 62271-301 © IEC:2009 – 5 –
d
L
IEC  1382/04
Diameter d (mm) 20 30 30 30 32 32 40 40 50 50 50 60 80
Corresponding length 80 80 125 130 80 130 80 125 40 80 100 125 125
L (mm)
Figure 1 – Dimensions for HV terminals with cylindrical shape
NOTE Solutions combining two cylindrical terminals on the same plate can be used, for example two cylinders of
40 mm × 80 mm with a centre distance of 200 mm.
4 HV terminals with rectangular shape
The recommended dimensions for rectangular HV terminals should be restricted to the
diameters of and the distances between the holes.
The dimensions are as follows:
– hole diameters: 14 mm, 16 mm, 17 mm, 18 mm 19 mm and 22 mm;
– distance between holes: 40 mm, 45 mm, 50 mm and 60 mm (centre-to-centre).
NOTE A hole diameter of 14,3 mm and distance between holes of 44,5 mm exist in certain countries.
Any possible combination of these dimensions is permitted.
The distance between holes should be applied to two adjacent holes, both along the abscissa
or ordinate.
Typical examples of hole arrangements are given in Figures 2 through 7.

– 6 – TR 62271-301 © IEC:2009
A
C
IEC  1811/09
A C
mm mm
32 14
40 14
44,5 14,3
Figure 2 – Two hole HV terminals
B
A
C
IEC  1812/09
A B C
mm mm mm
40 40 14
44,5 44,5 14,3
45 45 14
45 45 16
50 50 14
Figure 3 – Four hole HV terminals (2 × 2 hole pattern)

TR 62271-301 © IEC:2009 – 7 –
BB
A
C
IEC  1813/09
A B C
mm mm mm
44,5 44,5 14,3
45 45 14
45 45 16
Figure 4 – Six hole HV terminal (2 × 3 hole pattern)
IEC  1814/09
A B C
mm mm mm
44,5 44,5 14,3
45 45 14
45 45 16
Figure 5 – Six hole HV terminal (3 × 2 hole pattern)

– 8 – TR 62271-301 © IEC:2009
IEC  1815/09
A B C
mm mm mm
50 50 14
Figure 6 – Eight hole HV terminal (2 × 4 hole pattern)
IEC  1816/09
A B C
mm mm mm
45 45 16
40 40 14
Figure 7 – Nine hole HV terminal (3 × 3 hole pattern)

___________
– 10 – TR 62271-301 © CEI:2009
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
APPAREILLAGE À HAUTE TENSION –

Partie 301: Normalisation dimensionnelle des bornes à haute tension

AVANT-PROPOS
1) La Commission Electrotechnique Internationale (CEI) est une organisation mondiale de normalisation
composée de l'ensemble des comités électrotechniques nationaux (Comités nationaux de la CEI). La CEI a
pour objet de favoriser la coopération internationale pour toutes les questions de normalisation dans les
domaines de l'électricité et de l'électronique. A cet effet, la CEI – entre autres activités – publie des Normes
internationales, des Spécifications techniques, des Rapports techniques, des Spécifications accessibles au
public (PAS) et des Guides (ci-après dénommés "Publication(s) de la CEI"). Leur élaboration est confiée à des
comités d'études, aux travaux desquels tout Comité national intéressé par le sujet traité peut participer. Les
organisations internationales, gouvernementales et non gouvernementales, en liaison avec la CEI, participent
également aux travaux. La CEI collabore étroitement avec l'Organisation Internationale de Normalisation (ISO),
selon des conditions fixées par accord entre les deux organisations.
2) Les décisions ou accords officiels de la CEI concernant les questions techniques représentent, dans la mesure
du possible,
...