EN 62271-200:2004

SLOVENSKI SIST EN 62271-200:2004

STANDARD
junij 2004
High-voltage switchgear and controlgear - Part 200: AC metal-enclosed switchgear
and controlgear for rated voltages above 1 kV and up to and including 52 kV
ICS 29.130.10 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD EN 62271-200
NORME EUROPÉENNE
EUROPÄISCHE NORM February 2004

ICS 29.130.19 Supersedes EN 60298:1996 + A11:1999

English version
High-voltage switchgear and controlgear
Part 200: AC metal-enclosed switchgear and controlgear
for rated voltages above 1 kV and up to and including 52 kV
(IEC 62271-200:2003)
Appareillage à haute tension Hochspannungs-Schaltgeräte und
Partie 200: Appareillage sous enveloppe -Schaltanlagen
métallique pour courant alternatif Teil 200: Metallgekapselte
de tensions assignées supérieures à 1 kV Wechselstrom-Schaltanlagen für
et inférieures ou égales à 52 kV Bemessungsspannungen über 1 kV bis
(CEI 62271-200:2003) einschließlich 52 kV
(IEC 62271-200:2003)
This European Standard was approved by CENELEC on 2004-02-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 62271-200:2004 E
Foreword
The text of document 17C/311/FDIS, future edition 1 of IEC 62271-200, prepared by SC 17C, High-
voltage switchgear and controlgear assemblies, of IEC TC 17, Switchgear and controlgear, was
submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 62271-200 on
2004-02-01.
This European Standard supersedes EN 60298:1996 + A11:1999.
Significant technical changes with respect to EN 60298:1996 are as follows:
This revised document has been basically changed to be updated to today's use of high-voltage
switchgear and controlgear up to 52 kV. The main changes are: new definitions and classification of
equipment, introduction of internal arc classes (IAC) and its testing.
This standard is to be read in conjunction with EN 60694:1996. Clause numbering follows the clause
numbering of that standard. Additional subclauses, as they relate to a particular clause or subclause
from EN 60694, are numbered 101, 102, etc.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2004-11-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2007-02-01
Annexes ZA and ZB have been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 62271-200:2003 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 60137 NOTE Harmonized as EN 60137:1996 (not modified).
IEC 60517 NOTE Harmonized as HD 358 S3:1992 (not modified).
__________
- 3 - EN 62271-200:2004
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application 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 When an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 60050-151 2001 International Electrotechnical - -
Vocabulary (IEV)
Part 151: Electrical and magnetic
devices
IEC 60050-441 1984 Chapter 441: Switchgear, controlgear - -
and fuses
IEC 60060-1 1989 High-voltage test techniques HD 588.1 S1 1991
+ corr. March 1990 Part 1: General definitions and test
requirements
IEC 60243-1 1998 Electrical strength of insulating EN 60243-1 1998
materials - Test methods
Part 1: Tests at power frequencies

IEC 60265-1 1998 High-voltage switches EN 60265-1 1998
Part 1: Switches for rated voltages
above 1 kV and less than 52 Kv

IEC 60270 2000 High-voltage test techniques - Partial EN 60270 2001
discharge measurements
IEC 60466 1987 AC insulation-enclosed switchgear and - -
controlgear for rated voltages above
1 kV and up to and including 38 kV

IEC 60470 2000 High-voltage alternating current - -
contactors and contactor-based motor-
starters
IEC 60480 1974 Guide to the checking of sulphur - -
hexafluoride (SF6) taken from electrical
equipment
IEC 60529 1989 Degrees of protection provided by EN 60529 1991
enclosures (IP Code) + corr. May 1993

IEC 60694 1996 Common specifications for high-voltage EN 60694 1996
switchgear and controlgear standards + corr. May 1999

Publication Year Title EN/HD Year
IEC 60909-0 2001 Short-circuit currents in three-phase a.c. EN 60909-0 2001
systems
Part 0: Calculation of currents

IEC 60932 1988 Additional requirements for enclosed - -
switchgear and controlgear from 1kV to
72,5 kV to be used in severe climatic
conditions
IEC 61634 1995 High-voltage switchgear and controlgear - -
– Use and handling of sulphur
hexafluoride (SF ) in high-voltage
switchgear and controlgear
IEC 62271-100 2001 High-voltage switchgear and controlgear EN 62271-100 2001
Part 100: High-voltage alternating-
current circuit-breakers
IEC 62271-102 2001 Part 102: High-voltage alternating EN 62271-102 2002
+ corr. April 2002 current disconnectors and earthing
switches
IEC 62271-105 2002 Part 105: Alternating current switch-fuse EN 62271-105 2003
combinations
ISO/IEC Guide 51 1999 Safety aspects - Guidelines for their - -
inclusion in standards
- 5 - EN 62271-200:2004
Annex ZB
(informative)
A-deviations
A-deviation: National deviation due to regulations, the alteration of which is for the time being outside
the competence of the CENELEC member.
This European Standard does not fall under any Directive of the EC.
In the relevant CENELEC countries these A-deviations are valid instead of the provisions of the
European Standard until they have been removed.
Clause Deviation
1 Italy (Italian pressure vessel code for electrical switchgear DM 1 December 1980 and
DM 10 September 1981 published in Gazzetta Ufficiale n° 285 dated 16.10.1981)
For metal-enclosed switchgear and controlgear containing gas-filled compartments,
the design pressure is limited to a maximum of 0,5 bar (gauge) and the volume is
limited to a maximum of 2 m . Gas filled compartments having a design pressure
exceeding 0,5 bar (gauge) or a volume exceeding 2 m shall be designed according
to the Italian pressure vessel code for electrical switchgear.

IEC 62271-200
Edition 1.0 2003-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
High-voltage switchgear and controlgear –
Part 200: AC metal-enclosed switchgear and controlgear for rated voltages
above 1 kV and up to and including 52 kV

Appareillage à haute tension –
Partie 200: Appareillage sous enveloppe métallique pour courant alternatif
de tensions assignées supérieures à 1 kV et inférieures ou égales à 52 kV

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XC
CODE PRIX
ICS 29.130.10 ISBN 2-8318-7240-5

62271-200 © IEC:2003 – 3 –
– 2 – 62271-200 © IEC:2003
CONTENTS
FOREWORD .5
1 General.9
1.1 Scope .9
1.2 Normative references.10
2 Normal and special service conditions .11
3 Terms and definitions.11
4 Ratings .17
4.1 Rated voltage (U ).17
r
4.2 Rated insulation level.17
4.3 Rated frequency (f ) .17
r
4.4 Rated normal current and temperature rise .17
4.5 Rated short-time withstand current (I ) .18
k
4.6 Rated peak withstand current (I ).18
p
4.7 Rated duration of short circuit (t ).18
k
4.8 Rated supply voltage of closing and opening devices and of auxiliary and
control circuits (U ) .18
a
4.9 Rated supply frequency of closing and opening devices and of auxiliary
circuits.18
4.10 Rated pressure of compressed gas supply for insulation and/or operation.18
4.10.1 Rated filling level (of fluid-filled compartments).18
5 Design and construction.19
5.1 Requirements for liquids in switchgear and controlgear .19
5.2 Requirements for gases in switchgear and controlgear .19
5.3 Earthing.19
5.4 Auxiliary and control equipment.21
5.5 Dependent power operation .21
5.6 Stored energy operation.21
5.7 Independent manual operation .21
5.8 Operation of releases.21
5.9 Low- and high-pressure interlocking and monitoring devices.21
5.10 Nameplates .21
5.11 Interlocking devices .22
5.12 Position indication.23
5.13 Degrees of protection by enclosures.23
5.14 Creepage distances .23
5.15 Gas and vacuum tightness .23
5.16 Liquid tightness.24
5.17 Flammability .24
5.18 Electromagnetic compatibility (EMC) .24
6 Type tests .30
6.1 General .30
6.2 Dielectric tests .32
6.3 Radio interference voltage (r.i.v.) test.35
6.4 Measurement of the resistance of circuits.36
6.5 Temperature-rise tests.38
6.6 Short-time withstand current and peak withstand current tests.37

62271-200 © IEC:2003 – 5 –
62271-200 © IEC:2003 – 3 –
6.7 Verification of the protection.39
6.8 Tightness tests .39
6.9 Electromagnetic compatibility tests (EMC).39
6.10 Additional tests on auxiliary and control circuits .39
7 Routine tests.43
7.1 Dielectric test on the main circuit.44
7.2 Tests on auxiliary and control circuits.44
7.3 Measurement of the resistance of the main circuit .44
7.4 Tightness test .44
7.5 Design and visual checks.44
8 Guide to the selection of metal-enclosed switchgear and controlgear for service.46
8.1 Selection of rated values.46
8.2 Selection of design and construction .46
8.3 Internal arc classification.49
9 Information to be given with enquiries, tenders and orders.53
10 Rules for transport, storage, installation, operation and maintenance.55
10.1 Conditions during transport, storage and installation.55
10.2 Installation .55
10.3 Operation.55
10.4 Maintenance .55
11 Safety .56
Annex A (normative) Internal fault − Method for testing the metal-enclosed switchgear
and controlgear under conditions of arcing due to an internal fault .57
A.1 Introduction.57
A.2 Types of accessibility .58
A.3 Test arrangements.58
A.4 Current and voltage applied.62
A.5 Test procedure.63
A.6 Acceptance criteria .64
A.7 Test report .65
A.8 Designation of IAC classification.66
Annex B (normative) Partial discharge measurement .73
B.1 General.73
B.2 Application .73
B.3 Test circuits and measuring instruments.74
B.4 Test procedure.74
B.5 Maximum permissible partial discharge quantity .75
Annex C (informative) Explanatory notes .79
C.1 Changes in classifications, compared to the third edition (1990) of IEC 60298 .79
C.2 ANSI defined metal-clad.82

62271-200 © IEC:2003 – 7 –
– 4 – 62271-200 © IEC:2003
C.3 Former IEC defined metal-clad in terms of IEC 62271-200 definitions .82
C.4 Example of modular fuse-switch type.83
Bibliography .85
Figure A.1 – Mounting frame for vertical indicators.67
Figure A.2 – Horizontal indicator.67
Figure A.3 – Position of the indicators.68
Figure A.4 – Room simulation and indicator positioning for accessibility A, functional
unit at or above 1,5 m.69
Figure A.5 – Room simulation and indicator positioning for accessibility B, functional
unit above 2 m high .70
Figure A.6 – Room simulation and indicator positioning for accessibility B, functional
unit below 2 m high .71
Figure A.7 – Test arrangement for overhead connected pole-mounted switchgear and
controlgear.72
Figure B.1 – Partial discharge test circuit (three-phase arrangement).77
Figure B.2 – Partial-discharge test circuit (system without earthed neutral).78
Table 1 – Nameplate information .21
Table 2– Locations, causes and examples of measures to decrease the probability of
internal faults .50
Table 3 – Summary of technical requirements, ratings and optional tests for metal
enclosed switchgear .51
Table B.1 – Test circuits and procedures .76
Table C.1 – Comparison of IEC and IEEE definition of metal-clad .79
Table C.2 – Classification related to personnel safety in case of internal arc .80

62271-200 © IEC:2003 – 9 –
62271-200 © IEC:2003 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 200: AC metal-enclosed switchgear and controlgear
for rated voltages above 1 kV and up to and including 52 kV
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
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 62271-200 has been prepared by subcommittee 17C: High-voltage
switchgear and controlgear assemblies, of IEC technical committee 17: Switchgear and
controlgear.
This first edition of IEC 62271-200 cancels and replaces the third edition of IEC 60298,
published in 1990, and constitutes a technical revision.
Significant technical changes from the third edition of IEC 60298 are as follows:
This revised document has been basically changed to be updated to today’s use of high-
voltage switchgear and controlgear up to 52 kV. The main changes are: new definitions and
classification of equipment, introduction of internal arc classes (IAC) and its testing.

62271-200 © IEC:2003 – 11 –
– 6 – 62271-200 © IEC:2003
This standard is to be read in conjunction with IEC 60694 published in 1996. Clause
numbering follows the clause numbering of that standard. Additional subclauses, as they relate
to a particular clause or subclause from IEC 60694, are numbered 101, 102, etc.
The text of this standard is based on the following documents:
FDIS Report on voting
17C/311/FDIS 17C/315/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.
The committee has decided that the contents of this publication will remain unchanged until
2009. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
___________
IEC 60694 (1996) will be replaced by IEC 62271-1 as soon as available.

62271-200 © IEC:2003 – 13 –
62271-200 © IEC:2003 – 7 –
COMMON NUMBERING OF IEC 62271 PUBLICATIONS FALLING UNDER
THE RESPONSIBILITY OF SUBCOMMITTEES SC 17A AND SC 17C
In accordance with the decision taken at the joint SC 17A/SC 17C meeting in Frankfurt, June
1998 (item 20.7 of 17A/535/RM), a common numbering system has been established for the
publications falling under the responsibility of SC 17A and SC 17C. IEC 62271 – High-voltage
switchgear and controlgear is the publication number and main title element for the common
publications.
The numbering of these publications will apply the following principle.
a) Common standards prepared by SC 17A and SC 17C will start with IEC 62271-1.
b) Standards of SC 17A will start with IEC 62271-100.
c) Standards of SC 17C will start with number IEC 62271-200.
d) Publications prepared by SC 17A and SC 17C will start with number IEC 62271-300.
The table below relates the new numbers to the old numbers. The parts numbered (xxx) will be
given a final number pending the decision to publish the revised publication as standard or
technical report.
62271-200 © IEC:2003 – 15 –
– 8 – 62271-200 © IEC:2003
Common numbering of IEC 62271 publications falling under the responsibility
of subcommittees SC 17A and SC 17C
IEC 62271 HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR Old IEC number,
series if any
Part New title
1 Common specifications IEC 60694
2 Seismic qualification for rated voltages of 72,5 kV and above -
100 High-voltage alternating current circuit-breakers IEC 60056
101 Synthetic testing IEC 60427
102 High-voltage alternating current disconnectors and earthing switches IEC 60129
103 Switches for rated voltages above 1 kV and less than 52 kV IEC 60265-1
104 Switches for rated voltages of 52 kV and above IEC 60265-2
105 Alternating current switch-fuse combinations IEC 60420
106 Alternating current contactors and contactor-based motor-starters IEC 60470
107 Alternating current switchgear-fuse combinations -
108 Switchgear having combined functions -
109 Series capacitor by-pass switches -
200 AC metal-enclosed switchgear and controlgear for rated voltages above 1 kV IEC 60298
and up to and including 52 kV
201 Insulation-enclosed switchgear and controlgear for rated voltages up to and IEC 60466
including 52 kV
202 High-voltage/low-voltage prefabricated substations IEC 61330
203 Gas-insulated metal-enclosed switchgear for rated voltages above 52 kV IEC 60517
204 High-voltage gas-insulated transmission lines for rated voltages of 72,5 kV and IEC 61640
above
(300) Guide for seismic qualification of high-voltage alternating current circuit- IEC 61166
breakers
(301) Guide for inductive load switching IEC 61233
(302) Guide for short-circuit and switching test procedures for metal-enclosed and IEC 61633
dead tank circuit-breakers
(303) Use and handling of sulphur hexafluoride (SF ) in high-voltage switchgear and IEC 61634
controlgear
(304) Additional requirements for enclosed switchgear and controlgear from 1 kV to IEC 60932
72,5 kV to be used in severe climatic conditions
(305) Cable connections for gas-insulated metal-enclosed switchgear for rated IEC 60859
voltages above 52 kV
(306) Direct connection between power transformers and gas-insulated metal- IEC 61639
enclosed switchgear for rated voltages above 52 kV
(307) Use of electronic and associated technologies in auxiliary equipment of IEC 62063
switchgear and controlgear
308 Guide for asymmetrical short-circuit breaking test duty T100a –
309 TRV parameters for high-voltage switchgear and controlgear for rated voltages -
above 1 kV and less than 100 kV
310 Electrical endurance testing for circuit-breakers rated 72,5 kV and above -

62271-200 © IEC:2003 – 17 –
62271-200 © IEC:2003 – 9 –
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 200: AC metal-enclosed switchgear and controlgear
for rated voltages above 1 kV and up to and including 52 kV
1 General
1.1 Scope
This part of IEC 62271 specifies requirements for factory-assembled metal-enclosed
switchgear and controlgear for alternating current of rated voltages above 1 kV and up to and
including 52 kV for indoor and outdoor installation, and for service frequencies up to and
including 60 Hz. Enclosures may include fixed and removable components and may be filled
with fluid (liquid or gas) to provide insulation.
NOTE 1 Although primarily dedicated to three-phase systems, this standard can also be applied to single-phase or
two-phase systems.
This standard defines several types of metal enclosed switchgear and controlgear which differ
due to
– the consequences on network service continuity in case of maintenance on the switchgear
and controlgear;
– the need and convenience of maintenance of the equipment.
NOTE 2 Safety of an installation results from the design, implementation and coordination of products,
installations and operations.
For metal-enclosed switchgear and controlgear containing gas-filled compartments, the design
pressure is limited to a maximum of 300 kPa (relative pressure).
NOTE 3 Gas-filled compartments having a design pressure exceeding 300 kPa (relative pressure) should be
designed and tested in accordance with IEC 60517.
Metal-enclosed switchgear and controlgear for special use, for example, in flammable
atmospheres, in mines or on board ships, may be subject to additional requirements.
Components contained in metal-enclosed switchgear and controlgear are to be designed and
tested in accordance with their various relevant standards. This standard supplements the
standards for the individual components regarding their installation in switchgear and
controlgear assemblies.
This standard does not preclude that other equipment may be included in the same enclosure.
In such a case, any possible influence of that equipment on the switchgear and controlgear is
to be taken into account.
NOTE 4 Switchgear and controlgear assemblies having an insulation enclosure are covered by IEC 60466.
NOTE 5 Metal-enclosed switchgear and controlgear for rated voltages above 52 kV insulated by ambient air may
be covered by this standard taking into account the insulation levels of IEC 60694.

62271-200 © IEC:2003 – 19 –
– 10 – 62271-200 © IEC:2003
1.2 Normative references
The following referenced documents are indispensable for the application 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.
IEC 60050(151):2001, International Electrotechnical Vocabulary – Chapter 151: Electrical and
magnetic devices
IEC 60050(441):1984, International Electrotechnical Vocabulary – Chapter 441: Switchgear,
controlgear and fuses
IEC 60060-1:1989, High-voltage test techniques – Part 1: General definitions and test
requirements
IEC 60243-1:1998, Electrical strength of insulating materials – Test methods – Part 1: Tests at
power frequencies
IEC 60265-1:1998, High-voltage switches – Part 1: Switches for rated voltages above 1 kV and
less than 52 kV
IEC 60270:2000, High-voltage test techniques – Partial discharge measurements
IEC 60466:1987, AC insulation-enclosed switchgear and controlgear for rated voltages above 1
kV and up to and including 38 kV
IEC 60470:2000, High-voltage alternating current contactors and contactor-based motor-
starters
IEC 60480:1974, Guide to the checking of sulphur hexafluoride (SF ) taken from electrical
equipment
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
IEC 60694:1996, Common specifications for high-voltage switchgear and controlgear standards
IEC 60909-0:2001, Short-circuit currents in three-phase a.c. systems – Part 0: Calculation of
currents
IEC 60932:1988, Additional requirements for enclosed switchgear and controlgear from 1 kV to
72,5 kV to be used in severe climatic conditions
IEC 61634:1995, High-voltage switchgear and controlgear – Use and handling of sulphur
hexafluoride (SF ) in high-voltage switchgear and controlgear
IEC 62271-100:2001, High-voltage alternating-current circuit-breakers
IEC 62271-102:2001, High-voltage switchgear and controlgear – Part 102: Alternating current
disconnectors and earthing switches
IEC 62271-105:2002, High-voltage switchgear and controlgear – Part 105: Alternating current
switch-fuse combinations
ISO/IEC Guide 51:1999, Safety aspects – Guidelines for their inclusion in standards

62271-200 © IEC:2003 – 21 –
62271-200 © IEC:2003 – 11 –
2 Normal and special service conditions
Clause 2 of IEC 60694 is applicable with the following addition:
Unless otherwise specified in this standard, the metal-enclosed switchgear and controlgear is
designed to be used under normal service conditions.
3 Terms and definitions
For the purposes of this document, the following definitions as well as the definitions of
IEC 60050(441), IEC 60050(151) and IEC 60694 apply, except where indicated. Some standard
definitions are recalled here for ease of reference.
Additional definitions are classified so as to be aligned with the classification system used in IEC
60050(441).
3.101
switchgear and controlgear
general term covering switching devices and their combination with associated control,
measuring, protective and regulating equipment, also assemblies of such devices and
equipment with associated interconnections, accessories, enclosures and supporting structures
[IEV 441-11-01]
3.102
metal-enclosed switchgear and controlgear
switchgear and controlgear assemblies with an external metal enclosure intended to be earthed
and completely assembled, except for external connections
[IEV 441-12-04, modified]
3.103
functional unit (of an assembly)
part of metal-enclosed switchgear and controlgear comprising all the components of the
main circuits and auxiliary circuits that contribute to the fulfilment of a single function
[IEV 441-13-04, modified]
NOTE Functional units may be distinguished according to the function for which they are intended, for example,
incoming unit, outgoing unit, etc.
3.104
multi-tier
two or more functional units arranged vertically within a single enclosure
3.105
transport unit
part of metal-enclosed switchgear and controlgear suitable for shipment without being
dismantled
3.106
enclosure
part of metal-enclosed switchgear and controlgear providing a specified degree of protection of
equipment against external influences and a specified degree of protection against approach to
or contact with live parts and against contact with moving parts
[IEV 441-13-01 modified]
62271-200 © IEC:2003 – 23 –
– 12 – 62271-200 © IEC:2003
3.107
compartment
part of metal-enclosed switchgear and controlgear enclosed except for openings necessary for
interconnection, control or ventilation
[IEV 441-13-05, modified]
Four types of compartments are distinguished, three that can be opened, called accessible
(see 3.107.1 to 3.107.3) and one that cannot be opened, called non-accessible (see 3.107.4)
NOTE Compartments are identified according to the main component(s) contained therein (refer to 5.103.1).
3.107.1
interlock-controlled accessible compartment
compartment containing high-voltage parts, intended to be opened for normal operation and/or
normal maintenance as stated by the manufacturer, in which access is controlled by integral
design of the switchgear and controlgear
NOTE Installation, extension, repairing, etc. are not considered as normal maintenance.
3.107.2
procedure-based accessible compartment
compartment containing high-voltage parts, intended to be opened for normal operation and/or
normal maintenance as stated by the manufacturer, in which access is controlled by a suitable
procedure combined with locking
NOTE Installation, extension, repairing, etc. are not considered as normal maintenance.
3.107.3
tool-based accessible compartment
compartment containing high-voltage parts, that may be opened, but not for normal operation
and maintenance. Special procedures are required. Tools are necessary for opening
3.107.4
non-accessible compartment
compartment containing high-voltage parts that must not be opened. Opening may destroy the
integrity of the compartment. Clear indication not to open is provided on/by the compartment
3.108
partition
part of metal-enclosed switchgear and controlgear separating one compartment from other
compartments
[IEV 441-13-06, modified]
3.109
partition class
class defining whether metallic or non-metallic material for separation to live parts is used
3.109.1
partition class PM
metal-enclosed switchgear and controlgear providing continuous metallic partitions and/or
shutters (if applicable), intended to be earthed, between opened accessible compartments and
live parts of the main circuit

62271-200 © IEC:2003 – 25 –
62271-200 © IEC:2003 – 13 –
3.109.2
partition class PI
metal-enclosed switchgear and controlgear having one or more non-metallic partitions or
shutters between opened accessible compartments and live parts of the main circuit
3.110
shutter
part of metal-enclosed switchgear and controlgear that can be moved from a position where it
permits contacts of a removable part, or moving contact of a disconnector, to engage fixed
contacts, to a position where it becomes a part of the enclosure or partition shielding the fixed
contacts
[IEV 441-13-07, modified]
3.111
segregation (of conductors)
arrangement of conductors with earthed metal interposed between them in such a manner that
disruptive discharges can only occur to earth
[IEV 441-11-11]
NOTE A segregation may be established between the conductors as well as between the open contacts of a
switching device or disconnector.
3.112
bushing
structure carrying one or more conductors through an enclosure or partition and insulating it
therefrom, including the means of attachment
3.113
component
essential part of the main or earthing circuits of metal-enclosed switchgear and controlgear
which serves a specific function (for example, circuit-breaker, disconnector, switch, fuse,
instrument transformer, bushing, busbar)
3.114
main circuit (of an assembly)
all the conductive parts of metal-enclosed switchgear and controlgear included in a circuit
which is intended to transmit electrical energy
[IEV 441-13-02, modified]
3.115
earthing circuit
connection of each earthing device, or points provided for earthing purposes, to the terminal
intended to be connected to the earthing system of the installation
3.116
auxiliary circuit
all the conductive parts of metal-enclosed switchgear and controlgear included in a circuit
(other than the main circuit) intended to control, measure, signal and regulate
[IEV 441-13-03, modified]
NOTE The auxiliary circuits of metal-enclosed switchgear and controlgear include the control and auxiliary circuits
of the switching devices.
62271-200 © IEC:2003 – 27 –
– 14 – 62271-200 © IEC:2003
3.117
pressure relief device
device intended to limit the pressure in a fluid-filled compartment
3.118
fluid-filled compartment
compartment of metal-enclosed switchgear and controlgear filled with a fluid, either gas, other
than ambient air, or liquid, for insulation purposes
3.118.1
gas-filled compartment
refer to 3.6.5.1 of IEC 60694
3.118.2
liquid-filled compartment
compartment of metal-enclosed switchgear and controlgear in which the liquid is at
atmospheric pressure, or under pressure that is maintained by one of the following systems:
a) controlled pressure system;
b) closed pressure system;
c) sealed pressure system.
For pressure systems, refer to 3.6.4 of IEC 60694
3.119
relative pressure
pressure, referred to the standard atmospheric pressure of 101,3 kPa
3.120
minimum functional level (of fluid-filled compartments)
gas pressure (relative pressure) in Pa (or density) or liquid mass at and above which the rated
values of the metal-enclosed switchgear and controlgear are maintained
3.121
design level (of fluid-filled compartments)
gas pressure (relative pressure) in Pa (or density) or liquid mass used to determine the design
of a gas-filled compartment or mass for a liquid-filled compartment
3.122
design temperature (of fluid-filled compartments)
highest temperature which can be reached by the gas or liquid under service conditions
3.123
ambient air temperature (of metal-enclosed switchgear and controlgear)
temperature, determined under prescribed conditions, of the air surrounding the enclosure of
metal-enclosed switchgear and controlgear
3.124
removable part
part of metal-enclosed switchgear and controlgear connected to the main circuit and that may
be removed entirely from the metal-enclosed switchgear and controlgear and replaced, even
though the main circuit of the functional unit is live
[IEV 441-13-08, modified]
62271-200 © IEC:2003 – 29 –
62271-200 © IEC:2003 – 15 –
3.125
withdrawable part
removable part of metal-enclosed switchgear and controlgear that can be moved to positions in
which an isolating distance or segregation between open contacts is established, while the part
remains mechanically attached to the enclosure
[IEV 441-13-09, modified]
3.126
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