EN 62271-203:2012

SLOVENSKI STANDARD
01-julij-2012
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High-voltage switchgear and controlgear - Part 203: Gas-insulated metal-enclosed
switchgear for rated voltages above 52 kV (IEC 62271-203:2011)
Hochspannungs-Schaltgeräte und -Schaltanlagen - Teil 203: Gasisolierte
metallgekapselte Schaltanlagen für Bemessungsspannungen über 52 kV (IEC 62271-
203:2011)
Appareillage à haute tension - Partie 203: Appareillage sous enveloppe métallique à
isolation gazeuse de tensions assignées supérieures à 52 kV (CEI 62271-203:2011)
Ta slovenski standard je istoveten z: EN 62271-203:2012
ICS:
29.130.10 Visokonapetostne stikalne in High voltage switchgear and
krmilne naprave controlgear
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 62271-203
NORME EUROPÉENNE
May 2012
EUROPÄISCHE NORM
ICS 29.130.10 Supersedes EN 62271-203:2004

English version
High-voltage switchgear and controlgear -
Part 203: Gas-insulated metal-enclosed switchgear for rated voltages
above 52 kV
(IEC 62271-203:2011)
Appareillage à haute tension -  Hochspannungs-Schaltgeräte und -
Partie 203: Appareillage sous enveloppe Schaltanlagen -
métallique à isolation gazeuse de tensions Teil 203: Gasisolierte metallgekapselte
assignées supérieures à 52 kV Schaltanlagen für
(CEI 62271-203:2011) Bemessungsspannungen über 52 kV
(IEC 62271-203:2011)
This European Standard was approved by CENELEC on 2011-10-12. 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, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland, Turkey and the United Kingdom.

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

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62271-203:2012 E
Foreword
The text of document 17C/512/FDIS, future edition 2 of IEC 62271-203, 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 approved by CENELEC as EN 62271-203:2012.

The following dates are fixed:
(dop) 2012-11-11
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2014-10-12

standards conflicting with the
document have to be withdrawn
This document supersedes EN 62271-203:2004.
203:2004:
— adopting the structure and the content to EN 62271-1,
— harmonisation with IEEE C37.122,
— addition of the new Annex F and the new Annex G.
applicable unless otherwise specified. In order to simplify the indication of corresponding requirements,
the same numbering of clauses and subclauses is used as in EN 62271-1. Amendments to these clauses
and subclauses are given under the same numbering, whilst additional subclauses, are numbered from
101.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent
rights.
Endorsement notice
The text of the International Standard IEC 62271-203:2011 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 60038 NOTE  Harmonized as EN 60038.
IEC 60060-1 NOTE  Harmonized as EN 60060-1.
IEC 60071-1:2006 NOTE  Harmonized as EN 60071-1:2006 (not modified).
IEC 61462 NOTE  Harmonized as EN 61462.
IEC 61672-1 NOTE  Harmonized as EN 61672-1.
IEC 61672-2 NOTE  Harmonized as EN 61672-2.
IEC 62155 NOTE  Harmonized as EN 62155.
IEC 62271-207 NOTE  Harmonized as EN 62271-207.

- 3 - EN 62271-203:2012
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. 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 60044-1 (mod) 1996 Instrument transformers - EN 60044-1 1999
Part 1: Current transformers
1)
IEC 60044-2 (mod) 1997 Instrument transformers - EN 60044-2 1999
Part 2: Inductive voltage transformers

IEC 60068-2-11 - Environmental testing - EN 60068-2-11 -
Part 2: Tests - Test Ka: Salt mist

IEC 60137 2008 Insulated bushings for alternating voltages EN 60137 2008
above 1 000 V
IEC 60141-1 - Tests on oil-filled and gas-pressure cables - -
and their accessories -
Part 1: Oil-filled, paper- insulated, metal-
shealthed cables and accessories for
alternating voltages up to and including 400
kV
IEC 60270 - High-voltage test techniques - Partial EN 60270 -
discharge measurements
IEC 60376 - Specification of technical grade sulfur EN 60376 -
hexafluoride (SF6) for use in electrical
equipment
IEC 60480 - Guidelines for the checking and treatment of EN 60480 -
sulphur hexafluoride (SF6) taken from
electrical equipment and specification for its
re-use
IEC 60840 - Power cables with extruded insulation and - -
their accessories for rated voltages above 30
kV (Um = 36 kV) up to 150 kV (Um = 170 kV)
- Test methods and requirements

IEC/TS 61639 1996 Direct connection between power - -
transformers and gas-insulated metal-
enclosed switchgear for rated voltages of 72,5
kV and above
IEC 62067 - Power cables with extruded insulation and - -
their accessories for rated voltages above 150
kV (Um = 170 kV) up to 500 kV (Um = 550 kV)
- Test methods and requirements

IEC 62271-1 2007 High-voltage switchgear and controlgear - EN 62271-1 2008
Part 1: Common specifications
IEC 62271-100 2008 High-voltage switchgear and controlgear - EN 62271-100 2009
Part 100: Alternating current circuit-breakers

1)
EN 60044-2 is superseded by EN 61869-3:2011, which is based on IEC 61869-3:2011.

Publication Year Title EN/HD Year

IEC 62271-102 2001 High-voltage switchgear and controlgear - EN 62271-102 2002
+ corr. April 2002 Part 102: Alternating current disconnectors + corr. July 2008
+ corr. February 2005 and earthing switches + corr. March 2005
+ corr. May 2003
IEC 62271-209 2007 High-voltage switchgear and controlgear - EN 62271-209 2007
Part 209: Cable connections for gas-insulated
metal-enclosed switchgear for rated voltages
above 52 kV - Fluid-filled and extruded
insulation cables - Fluid-filled and dry-type
cable-terminations
IEC/TR 62271-303 - High-voltage switchgear and controlgear - CLC/TR 62271-303 -
Part 303: Use and handling of sulphur
hexafluoride (SF6)
ISO 3231 - Paints and varnishes - Determination of EN ISO 3231 -
resistance to humid atmospheres containing
sulphur dioxide
- 5 - EN 62271-203:2012
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 EU.
In the relevant CEN-CENELEC countries these A-deviations are valid instead of the provisions of the
European Standard until they have been removed.
Article Deviation
5.103.2 Italy (Italian pressure vessel code for electrical switchgear DM 1 December 1980 and DM
10 September 1981 published in Gazzetta Ufficiale della Repubblica Italiana 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 m3 shall be designed according to the Italian pressure
vessel code for electrical switchgear.

IEC 62271-203 ®
Edition 2.0 2011-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
High-voltage switchgear and controlgear –
Part 203: Gas-insulated metal-enclosed switchgear for rated voltages above
52 kV
Appareillage à haute tension –
Partie 203: Appareillage sous enveloppe métallique à isolation gazeuse de
tensions assignées supérieures à 52 kV

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XC
ICS 29.130.10 ISBN 978-2-88912-664-4

– 2 – 62271-203  IEC:2011
CONTENTS
FOREWORD . 6
1 General . 8
1.1 Scope . 8
1.2 Normative references . 8
2 Normal and special service conditions . 9
2.1 Normal service conditions . 9
2.2 Special service conditions . 9
3 Terms and definitions . 10
4 Ratings . 12
4.1 Rated voltage (U ) . 13
r
4.2 Rated insulation level . 13
4.3 Rated frequency (f ) . 15
r
4.4 Rated normal current and temperature rise . 15
4.4.1 Rated normal current (I ) . 15
r
4.4.2 Temperature rise . 15
4.5 Rated short-time withstand current (I ) . 15
k
4.6 Rated peak withstand current (I ) . 15
p
4.7 Rated duration of short-circuit (t ) . 15
k
4.8 Rated supply voltage of closing and opening devices and of auxiliary and
control circuits (U ) . 15
a
4.9 Rated supply frequency of closing and opening devices and of auxiliary
circuits . 16
4.10 Rated pressure of compressed gas supply for controlled pressure systems . 16
4.11 Rated filling levels for insulation and/or operation . 16
5 Design and construction . 16
5.1 Requirements for liquids in switchgear and controlgear . 16
5.2 Requirements for gases in switchgear and controlgear . 16
5.3 Earthing of switchgear and controlgear . 16
5.4 Auxiliary and control equipment . 17
5.5 Dependent power operation . 17
5.6 Stored energy operation . 17
5.7 Independent manual or power operation (independent unlatched operation) . 17
5.8 Operation of releases . 17
5.9 Low- and high-pressure interlocking and monitoring devices . 17
5.10 Nameplates . 18
5.11 Interlocking devices . 18
5.12 Position indication. 18
5.13 Degrees of protection by enclosures . 18
5.14 Creepage distances for outdoor insulators . 18
5.15 Gas and vacuum tightness . 19
5.15.1 Controlled pressure systems for gas . 19
5.15.2 Closed pressure systems for gas . 19
5.15.3 Sealed pressure systems . 19
5.16 Liquid tightness . 19
5.17 Fire hazard (flammability) . 19
5.18 Electromagnetic compatibility (EMC) . 19

62271-203  IEC:2011 – 3 –
5.19 X-Ray emission . 20
5.20 Corrosion . 20
5.101 Pressure coordination . 20
5.102 Internal fault . 21
5.103 Enclosures . 22
5.104 Partitions . 23
5.105 Pressure relief . 25
5.106 Noise . 26
5.107 Interfaces . 26
6 Type tests . 27
6.1 General . 27
6.1.1 Grouping of tests . 27
6.1.2 Information for identification of specimens . 28
6.1.3 Information to be included in type-tests reports . 29
6.2 Dielectric tests . 29
6.2.1 Ambient air conditions during tests . 29
6.2.2 Wet test procedure . 29
6.2.3 Conditions of switchgear and controlgear during dielectric tests. 29
6.2.4 Criteria to pass the test . 29
6.2.5 Application of the test voltage and test conditions . 29
6.2.6 Tests of switchgear and controlgear of U ≤ 245 kV . 30
r
6.2.7 Tests of switchgear and controlgear of rated voltage U >245 kV . 30
r
6.2.8 Artificial pollution tests for outdoor insulators . 31
6.2.9 Partial discharge tests . 31
6.2.10 Dielectric tests on auxiliary and control circuits . 32
6.2.11 Voltage test as condition check . 32
6.3 Radio interference voltage (r.i.v.) test . 32
6.4 Measurement of the resistance of circuits . 32
6.4.1 Main circuit . 32
6.4.2 Auxiliary circuits . 32
6.5 Temperature-rise tests. 32
6.5.1 Conditions of the switchgear and controlgear to be tested . 32
6.5.2 Arrangement of the equipment . 32
6.5.3 Measurement of the temperature and the temperature rise . 33
6.5.4 Ambient air temperature . 33
6.5.5 Temperature-rise test of the auxiliary and control equipment . 33
6.5.6 Interpretation of the temperature-rise tests . 33
6.6 Short-time withstand current and peak withstand current tests. 33
6.6.1 Arrangement of the switchgear and controlgear and of the test circuit . 33
6.6.2 Test current and duration . 33
6.6.3 Behaviour of switchgear and controlgear during test . 33
6.6.4 Conditions of switchgear and controlgear after test. 34
6.7 Verification of the protection . 34
6.7.1 Verification of the IP coding . 34
6.7.2 Verification of the IK coding . 34
6.8 Tightness tests . 34
6.8.1 Controlled pressure systems for gas . 34
6.8.2 Closed pressure systems for gas . 34
6.8.3 Sealed pressure systems . 35

– 4 – 62271-203  IEC:2011
6.8.4 Liquid tightness tests . 35
6.9 Electromagnetic compatibility tests (EMC) . 35
6.10 Additional tests on auxiliary and control circuits . 35
6.11 X-radiation test procedure for vacuum interrupters . 35
6.101 Verification of making and breaking capacities . 35
6.102 Mechanical and environmental tests. 35
6.103 Proof tests for enclosures . 36
6.104 Pressure test on partitions . 37
6.105 Test under conditions of arcing due to an internal fault . 37
6.106 Insulator tests . 38
6.107 Corrosion test on earthing connections . 38
6.108 Corrosion tests on enclosures . 39
7 Routine tests . 39
7.1 Dielectric test on the main circuit . 39
7.1.101 Power-frequency voltage tests on the main circuit . 40
7.1.102 Partial discharge measurement . 40
7.2 Tests on auxiliary and control circuits . 40
7.3 Measurement of the resistance of the main circuit . 40
7.4 Tightness test . 40
7.5 Design and visual checks. 40
7.101 Pressure tests of enclosures . 40
7.102 Mechanical operation tests . 41
7.103 Tests on auxiliary circuits, equipment and interlocks in the control mechanism . 41
7.104 Pressure test on partitions . 41
8 Guide to the selection of switchgear and controlgear . 41
8.1 Selection of rated values . 41
8.2 Continuous or temporary overload due to changed service conditions . 41
9 Information to be given with enquiries, tenders and orders . 42
9.1 Information with enquiries and orders . 42
9.2 Information with tenders . 42
10 Transport, storage, installation, operation and maintenance . 42
10.1 Conditions during transport, storage and installation . 42
10.2 Installation . 42
10.3 Operation . 47
10.4 Maintenance . 48
11 Safety . 48
12 Influence of the product on the environment . 48
Annex A (normative) Test procedure for dielectric test on three-phase encapsulated
GIS, range II . 49
Annex B (normative) Methods for testing gas-insulated metal-enclosed switchgear
under conditions of arcing due to an internal fault . 50
Annex C (informative) Technical and practical considerations of site testing . 53
Annex D (informative) Calculation of pressure rise due to an internal fault . 58
Annex E (informative) Information to be given with enquiries, tenders and orders . 59
Annex F (informative) Service continuity . 65
Annex G (informative) Insulation levels for GIS with rated voltages higher than 800 kV . 74
Annex H (informative) List of notes concerning certain countries . 75

62271-203  IEC:2011 – 5 –
Bibliography . 76

Figure 1 – Pressure coordination . 20
Figure 2 – Example of arrangement of enclosures and gas compartments . 25
Figure F.1 – Impact due to the removal of common partition between busbar-
disconnector . 66
Figure F.2 – Impact of GIS partitioning on service continuity . 67
Figure F.3 – Single line diagram with gas partitioning scheme . 67
Figure F.4 – Localisation and isolation . 69
Figure F.5 – Removal of busbar disconnector in SECTION-1 . 69
Figure F.6 – Removal of busbar disconnector in SECTION-3 . 70
Figure F.7 – Extension . 70
Figure F.8 – On-site dielectric test . 71

Table 1 – Reference table of service conditions relevant to GIS . 10
Table 2 – Rated insulation levels for rated voltages for equipment of range I. 14
Table 3 – Rated insulation levels for rated voltages for equipment of range II. 14
Table 4 – Performance criteria . 22
Table 5 – Example of grouping of type tests . 28
Table 6 – Test voltage for measuring PD intensity . 31
Table 7 – On site test voltages . 45
Table A.1 – Switching impulse test conditions above 245 kV . 49
Table E.1 – Normal and special service conditions . 59
Table E.2 – Ratings . 60
Table E.3 – Design and construction . 61
Table E.4 – Bus ducts . 62
Table E.5 – Bushing . 62
Table E.6 – Cable connection . 63
Table E.7 – Transformer connection . 63
Table E.8 – Current transformer . 63
Table E.9 – Inductive voltage transformer . 63
Table E.10 – Documentation for enquiries and tenders . 64
Table F.1 – Example for service continuity requirements . 72
Table G.1 – Insulation levels used for GIS with rated voltages higher than 800 kV in
different countries . 74

– 6 – 62271-203  IEC:2011
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

Part 203: Gas-insulated metal-enclosed switchgear
for rated voltages above 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 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 62271-203 has been prepared by subcommittee 17C: High-voltage
switchgear and controlgear assemblies, of IEC technical committee 17: Switchgear and
controlgear.
This second edition of IEC 62271-203 cancels and replaces the first edition of IEC 62271-203,
published in 2003, and constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
• adopting the structure and the content to IEC 62271-1,
• harmonisation with IEEE C37.122,
• addition of the new Annex F and the new Annex G.

62271-203  IEC:2011 – 7 –
The text of this standard is based on the following documents:
FDIS Report on voting
17C/512/FDIS 17C/524/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 reader's attention is drawn to the fact that Annex H lists all of the 'in-some-country' clauses
on differing practices of a less permanent nature relating to the subject of this standard.
This International Standard should be read in conjunction with IEC 62271-1:2007, to which it
refers and which is applicable unless otherwise specified. In order to simplify the indication of
corresponding requirements, the same numbering of clauses and subclauses is used as in
IEC 62271-1. Amendments to these clauses and subclauses are given under the same
numbering, whilst additional subclauses, are numbered from 101.
A list of all the parts of IEC 62271 series can be found under the general title High-voltage
switchgear and controlgear, on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until the
stability 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.
– 8 – 62271-203  IEC:2011
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

Part 203: Gas-insulated metal-enclosed switchgear
for rated voltages above 52 kV

1 General
1.1 Scope
This part of IEC 62271 specifies requirements for gas-insulated metal-enclosed switchgear in
which the insulation is obtained, at least partly, by an insulating gas other than air at
atmospheric pressure, for alternating current of rated voltages above 52 kV, for indoor and
outdoor installation, and for service frequencies up to and including 60 Hz.
For the purpose of this standard, the terms “GIS” and “switchgear” are used for “gas-insulated
metal-enclosed switchgear”.
The gas-insulated metal-enclosed switchgear covered by this standard consists of individual
components intended to be directly connected together and able to operate only in this manner.
This standard completes and amends, if necessary, the various relevant standards applying to
the individual components constituting GIS.
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 60044-1:1996, Instrument transformers – Part 1: Current transformers
IEC 60044-2:1997, Instrument transformers – Part 2: Inductive voltage transformers
IEC 60068-2-11, Basic environmental testing procedures – Part 2-11: Tests – Test Ka: Salt
mist
IEC 60137:2008, Insulating bushings for alternating voltages above 1 000 V
IEC 60141-1, Tests on oil-filled and gas-pressure cables and their accessories – Part 1: Oil-
filled, paper-insulated, metal-sheathed cables and accessories for alternating voltages up to
and including 400 kV
IEC 60270, High-voltage test techniques – Partial discharge measurements
IEC 60376, Specification of technical grade sulfur hexafluoride (SF ) for use in electrical
equipment
IEC 60480, Guidelines for the checking and treatment of sulfur hexafluoride (SF ) taken from
electrical equipment and specification for its re-use
IEC 60840, Power cables with extruded insulation and their accessories for rated voltages
above 30 kV (U = 36 kV) up to 150 kV (U = 170 kV) – Test methods and requirements
m m
62271-203  IEC:2011 – 9 –
IEC/TR 61639:1996, Direct connection between power transformers and gas-insulated metal-
enclosed switchgear for rated voltages of 72,5 kV and above
IEC 62067, Power cables with extruded insulation and their accessories for rated voltages
above 150 kV (U = 170 kV) up to 500 kV (U = 550 kV) – Test methods and requirements
m m
IEC 62271-1:2007, High-voltage switchgear and controlgear – Part 1: Common specifications
IEC 62271-100:2008, High-voltage switchgear and controlgear – Part 100: Alternating-current
circuit-breakers
IEC 62271-102:2001, High-voltage switchgear and controlgear – Part 102: Alternating current
disconnectors and earthing switches
IEC 62271-209:2007, High-voltage switchgear and controlgear – Part 209: Cable connections
for gas-insulated metal-enclosed switchgear for rated voltages above 52 kV – Fluid-filled and
extruded insulation cables – Fluid-filled and dry-type cable-terminations
IEC/TR 62271-303, High-voltage switchgear and controlgear – Part 303: Use and handling of
sulphur hexafluoride (SF )
ISO 3231, Paints and varnishes – Determination of resistance to humid atmospheres
containing sulfur dioxide
2 Normal and special service conditions
Clause 2 of IEC 62271-1 is applicable with the following additions:
At any altitude the dielectric characteristics of the internal insulation are identical with those
measured at sea-level. For this internal insulation, therefore, no specific requirements
concerning the altitude are applicable.
Some items of a GIS such as pressure relief devices and pressure and density monitoring
devices may be affected by altitude. The manufacturer shall take appropriate measures if
necessary.
2.1 Normal service conditions
Subclause 2.1 of IEC 62271-1 is applicable, taking into account Table 1 of this standard.
2.2 Special service conditions
Subclause 2.2 of IEC 62271-1 is applicable, taking into account Table 1 of this standard.
In the cases where higher than (>) is used in the table the values shall be specified by the user
as described in IEC 62271-1.
– 10 – 62271-203  IEC:2011
Table 1 – Reference table of service conditions relevant to GIS
Normal Special
Item
Indoor Outdoor Indoor Outdoor
Ambient air temperature:
–5 or –25 –25 or –40 –25 –50
Minimum (°C)
+40 +40 +50 +50
Maximum (°C)
Solar radiation (W/m ) Not applicable 1 000 Not applicable >1 000
Altitude (m) 1 000 1 000 >1 000 >1 000
a
Site pollution severity Not applicable c c, d or e d or e
Ice coating (mm) Not applicable 1, 10 or 20 Not applicable >20
Wind (m/s) Not applicable 34 Not applicable >34
Humidity (%) 95 100 98 100
Condensation or precipitation Occasional Yes Yes Yes
Vibration class Not applicable Not applicable IEC 62271-207 IEC 62271-207
IEC/TR 62271- IEC/TR 62271-
300 300
NOTE The user’s specification may use any combination of normal or special service conditions above.
a
Site pollution severity c, d or e according to IEC/TS 60815-1:2008, 8.3.
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 62271-1, as well as
the following, apply.
3.101
metal-enclosed switchgear and controlgear
switchgear and controlgear assemblies with an external metal enclosure intended to be
earthed, and complete except for external connections
[IEC 60050-441:1984, 441-12-04]
3.102
gas-insulated metal-enclosed switchgear
metal-enclosed switchgear in which the insulation is obtained, at least partly, by an insulating
gas other than air at atmospheric pressure
[IEC 60050-441:1984, 441-12-05]
NOTE 1 This term generally applies to high-voltage switchgear and controlgear.
NOTE 2 Three-phase enclosed gas-insulated switchgear applies to switchgear with the three phases enclosed in
a common enclosure.
NOTE 3 Single-phase enclosed gas-insulated switchgear applies to switchgear with each phase enclosed in a
single independent enclosure.
3.103
gas-insulated switchgear enclosure
part of gas-insulated metal-enclosed switchgear retaining the insulating gas under the pre-
scribed conditions necessary to maintain safely the highest insulation level, protecting the
equipment against external influences and providing a high degree of protection to personnel
NOTE The enclosure can be single-phase or three-phase.

62271-203  IEC:2011 – 11 –
3.104
removable link
part of the conductor which can easily be removed in order to isolate two parts of the GIS from
each other
3.105
compartment
part of gas-insulated metal-enclosed swi
...