IEC 62271-200:2021
(Main)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
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 62271-200:2021 is applicable to prefabricated metal‑enclosed switchgear and controlgear assemblies designed for:
– alternating current;
– rated voltages above 1 kV and up to and including 52 kV;
– service frequencies up to and including 60 Hz;
– indoor and outdoor installation.
The assembly can include air-insulated and/or fluid-filled compartments.
This third edition cancels and replaces the second edition published in 2011. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) clause numbering aligned with IEC 62271‑1:2017, including the adoption of the subclause names of Clause 3;
b) in Clause 3 specific definitions are added for "in service", "normal operating condition" and "normal use";
c) internal arc testing on pole-mounted switchgear is taken out of this document, as it is now covered by the specific standard IEC 62271‑214:2019;
d) a more precise description of earthing circuit is given with the inclusion of ratings and test requirements;
e) number of mechanical tests on interlocks is reduced for type testing; a more precise description of forces to apply during type testing is given (refer to 7.102);
f) resistance measuring on main circuit is only needed before continuous current tests (as reference for routine tests) and no longer needed after this continuous current test. Rationale for this deletion is that this measured resistance does not mean anything; as the temperature rise test was just finished, a new temperature rise test will not give new information;
g) IEC 62271-100:2021, IEC 62271-103:2021, IEC 62271-105:2021 and IEC 62271-106:2021 are referred to in the document;
h) IEC 62271‑107:2019 and IEC IEEE 62271‑37‑013:2015 are also considered in 7.101.2;
i) a more precise description of LSC category is given with the inclusion of an explanatory flowchart (Annex D);
j) examples not covered by the IAC test are transferred from Clause 6 to 9.103;
k) the term "assembly" is defined in Clause 3 and used as synonym for "metal-enclosed switchgear and controlgear" in this document;
l) "metallic" is replaced by "metal" where applicable;
m) 6.105 is now covered by 7.7;
n) a 1 s rule was introduced for Criterion 4 during IAC tests regarding hot gases versus glowing particles as cause of ignition;
o) a more precise description of internal arc tests for switchgear with protrusions is given in Annex A.
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
L’IEC 62271-200:2021 est applicable aux ensembles d'appareillages préfabriqués sous enveloppe métallique conçus pour:
- le courant alternative;
- des tensions assignées supérieures à 1 kV et inférieures ou égales à 52 kV;
- des fréquences de service jusqu’à 60 Hz inclus;
- une installation à l'intérieur et à l'extérieur.
L’ensemble peut comprendre des compartiments isolés dans l’air et/ou remplis de fluide.
Cette troisième édition annule et remplace la deuxième édition publiée en 2011. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) numérotation des articles alignée sur l’IEC 62271‑1:2017, y compris l'adoption des noms des paragraphes de l’Article 3;
b) des définitions spécifiques sont ajoutées à l'Article 3 pour "en service", "condition normale de fonctionnement" et "utilisation normale";
c) l'essai d'arc interne sur les appareillages montés sur poteau est exclu du présent document, car il est maintenant couvert par la norme spécifique IEC 62271‑214:2019;
d) une description plus exacte du circuit de terre est donnée avec l'inclusion des valeurs assignées et des exigences d'essai;
e) réduction du nombre d'essais mécaniques sur les verrouillages pour les essais de type; meilleure description des forces à appliquer lors des essais de type (voir 7.102);
f) le mesurage de la résistance sur le circuit principal n'est nécessaire qu'avant les essais au courant permanent (comme référence pour les essais individuels de série) et n'est plus nécessaire après cet essai au courant permanent. La raison de cette suppression est que cette résistance mesurée ne signifie rien; comme l'essai d’échauffement vient de se terminer, un nouvel essai d’échauffement n’apporterait pas de nouvelles informations;
g) l’IEC 62271-100:2021, l’IEC 62271-103:2021, l’IEC 62271-105:2021 et l’IEC 62271‑106:2021 sont citées dans le present document;
h) l’IEC 62271‑107:2012 et l’IEC 62271‑37‑013:2015 sont également prises en considération en 7.101.2;
i) une description plus précise de la catégorie LSC est donnée avec l'inclusion d'un ordinogramme explicatif (Annexe D);
j) les exemples non couverts par l’essai IAC sont transférés de l’Article 6 au paragraphe 9.103;
k) le terme "ensemble" est défini à l'Article 3 et est utilisé comme synonyme d'"appareillage sous enveloppe métallique" dans le présent document;
l) "métallique" est remplacé par "en métal" le cas échéant;
m) le paragraphe 6.105 est maintenant couvert par le paragraphe 7.7;
n) une règle de 1 s a été introduite pour le Critère No 4 lors des essais IAC concernant les gaz chauds par rapport aux particules incandescentes comme cause d'amorçage;
o) une description plus précise des essais d'arc interne pour les appareillages avec des protubérances est donnée à l’Annexe A.
La présente version bilingue (2021-07) correspond à la version anglaise monolingue publiée en 2021-05.
La version française de cette norme n'a pas été soumise au vote.
General Information
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Standards Content (Sample)
IEC 62271-200 ®
Edition 3.1 2024-06
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
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
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IEC 62271-200 ®
Edition 3.1 2024-06
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
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
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.130.10 ISBN 978-2-8322-9349-2
REDLINE VERSION – 2 – IEC 62271-200:2021+AMD1:2024 CSV
IEC 2024
CONTENTS
FOREWORD . 9
INTRODUCTION . 12
1 Scope . 13
2 Normative references . 13
3 Terms and definitions . 14
3.1 General terms and definitions . 15
3.2 Assemblies of switchgear and controlgear . 16
3.3 Parts of assemblies . 16
3.4 Switching devices . 16
3.5 Parts of switchgear and controlgear . 16
3.6 Operational characteristics of switchgear and controlgear . 19
3.7 Characteristic quantities . 22
3.8 Index of definitions . 22
4 Normal and special service conditions . 24
5 Ratings . 24
5.1 General . 24
5.2 Rated voltage (U ) . 24
r
5.3 Rated insulation level (U , U , U ) . 24
d p s
5.4 Rated frequency (f ) . 24
r
5.5 Rated continuous current (I ) . 24
r
5.6 Rated short-time withstand currents (I , I ) . 25
k ke
5.6.101 Rated short-time withstand current (I ) . 25
k
5.6.102 Rated short-time phase-to-earth withstand current (I ) . 25
ke
5.7 Rated peak withstand currents (I , I ) . 25
p pe
5.7.101 Rated peak withstand current (I ) . 25
p
5.7.102 Rated peak phase-to-earth withstand current (I ) . 25
pe
5.8 Rated durations of short-circuit (t , t ) . 25
k ke
5.8.101 Rated duration of short-circuit (t ) . 26
k
5.8.102 Rated duration of phase-to-earth short-circuit (t ) . 26
ke
5.9 Rated supply voltage of auxiliary and control circuits (U ) . 26
a
5.10 Rated supply frequency of auxiliary and control circuits . 26
5.11 Rated pressure of compressed gas supply for controlled pressure systems . 26
5.101 Classification of earthing function through main switching device . 26
5.102 Rated cable test voltages (U , U ) . 26
ct (AC) ct (DC)
5.102.1 General . 26
5.102.2 Rated power-frequency cable test voltage U . 26
ct (AC)
5.102.3 Rated DC cable test voltage U with rated duration t . 26
ct (DC) ct (DC)
5.103 Ratings of the internal arc classification (IAC) . 27
5.103.1 General . 27
5.103.2 Types of accessibility . 27
5.103.3 Classified sides . 27
5.103.4 Rated arc fault currents (I , I ) . 27
A Ae
IEC 2024
5.103.5 Rated arc fault duration (t , t ) . 28
A Ae
6 Design and construction . 28
6.1 Requirements for liquids in switchgear and controlgear . 28
6.2 Requirements for gases in switchgear and controlgear . 28
6.3 Earthing of switchgear and controlgear . 28
6.3.101 Earthing of the high-voltage conductive parts . 28
6.3.102 Earthing of enclosure(s) . 28
6.3.103 Earthing of withdrawable and removable parts . 29
6.3.104 Earthing circuit . 29
6.4 Auxiliary and control equipment and circuits . 29
6.5 Dependent power operation . 29
6.6 Stored energy operation. 29
6.7 Independent unlatched operation (independent manual or power operation) . 30
6.8 Manually operated actuators . 30
6.9 Operation of releases. 30
6.10 Pressure/level indication . 30
6.11 Nameplates . 30
6.12 Locking devices . 32
6.13 Position indication . 33
6.14 Degrees of protection provided by enclosures . 33
6.14.1 General . 33
6.14.2 Protection of persons against access to hazardous parts and protection
of the equipment against ingress of solid foreign objects (IP coding) . 33
6.14.3 Protection against ingress of water (IP coding) . 33
6.14.4 Protection of equipment against mechanical impact under normal
operating conditions (IK coding) . 33
6.15 Creepage distances for outdoor insulators . 33
6.16 Gas and vacuum tightness . 33
6.17 Tightness for liquid systems . 34
6.18 Fire hazard (flammability) . 34
6.19 Electromagnetic compatibility (EMC) . 34
6.20 X-ray emission . 34
6.21 Corrosion . 34
6.22 Filling levels for insulation, switching and/or operation . 34
6.101 General requirements for assemblies . 34
6.102 Metal enclosure . 35
6.102.1 General . 35
6.102.2 Covers and doors . 35
6.102.3 Partition or shutter being part of the enclosure . 36
6.102.4 Inspection windows . 37
6.102.5 Ventilating openings, vent outlets . 37
6.103 High-voltage compartments . 37
6.103.1 General . 37
6.103.2 Fluid-filled compartments (gas or liquid) . 38
6.103.3 Partitions and shutters . 39
6.104 Removable parts . 41
6.105 Provisions for dielectric tests on cables . 41
6.106 Internal arc fault . 41
7 Type tests . 42
REDLINE VERSION – 4 – IEC 62271-200:2021+AMD1:2024 CSV
IEC 2024
7.1 General . 42
7.1.1 Basics . 42
7.1.2 Information for identification of test objects . 43
7.1.3 Information to be included in type-test reports . 43
7.2 Dielectric tests . 43
7.2.1 General . 43
7.2.2 Ambient air conditions during tests . 43
7.2.3 Wet test procedure . 43
7.2.4 Arrangement of the equipment . 43
7.2.5 Criteria to pass the test . 43
7.2.6 Application of the test voltage and test conditions . 43
7.2.7 Tests of switchgear and controlgear of U ≤ 245 kV . 45
r
7.2.8 Tests of switchgear and controlgear of U > 245 kV . 46
r
7.2.9 Artificial pollution tests for outdoor insulators . 46
7.2.10 Partial discharge tests . 46
7.2.11 Dielectric tests on auxiliary and control circuits . 46
7.2.12 Voltage test as condition check . 46
7.2.101 Dielectric tests on cable testing circuits . 46
7.3 Radio interference voltage (RIV) test . 46
7.4 Resistance measurement . 47
7.4.1 Measurement of the resistance of auxiliary contacts class 1 and class 2 . 47
7.4.2 Measurement of the resistance of auxiliary contacts class 3 . 47
7.4.3 Electrical continuity of earthed metallic parts test . 47
7.4.4 Resistance measurement of contacts and connections in the main
circuit as a condition check . 47
7.5 Continuous current tests . 47
7.5.1 Condition of the test object . 47
7.5.2 Arrangement of the equipment . 47
7.5.3 Test current and duration . 47
7.5.4 Temperature measurement during test . 48
7.5.5 Resistance of the main circuit . 48
7.5.6 Criteria to pass test . 48
7.5.101 Test report . 48
7.6 Short-time withstand current and peak withstand current tests . 49
7.6.1 General . 49
7.6.2 Arrangement of the equipment and of the test circuit . 50
7.6.3 Test current and duration . 50
7.6.4 Conditions of the test object after test . 51
7.7 Verification of the protection . 51
7.7.1 Verification of the IP coding . 51
7.7.2 Verification of the IK coding . 51
7.8 Tightness tests . 51
7.9 Electromagnetic compatibility tests (EMC) . 51
7.10 Additional tests on auxiliary and control circuits . 52
7.10.1 General . 52
7.10.2 Functional tests . 52
7.10.3 Verification of the operational characteristics of auxiliary contacts . 52
7.10.4 Environmental tests . 52
IEC 2024
7.10.5 Dielectric test . 52
7.11 X-radiation test for vacuum interrupters . 52
7.101 Verification of making and breaking capacities . 52
7.101.1 General . 52
7.101.2 Test requirements for main switching devices . 53
7.101.3 Test requirements for earthing function . 53
7.102 Mechanical operation tests . 53
7.102.1 Switching devices and removable parts . 53
7.102.2 Mechanical and electromechanical interlocks and locking devices . 54
7.103 Pressure withstand test for gas-filled compartments . 55
7.103.1 Pressure withstand test for gas-filled compartments with pressure relief
devices . 55
7.103.2 Pressure withstand test for gas-filled compartments without pressure-
relief devices . 57
7.104 Tests to verify the protection of persons against dangerous electrical effects . 57
7.104.1 General . 57
7.104.2 Dielectric tests . 58
7.104.3 Measurements of leakage currents . 58
7.105 Internal arc test . 58
7.105.1 General . 58
7.105.2 Test conditions . 58
7.105.3 Arrangement of the equipment . 60
7.105.4 Test procedure . 60
7.105.5 Criteria to pass the test . 60
7.105.6 Test report . 61
7.105.7 Extension of validity of test results . 62
8 Routine tests . 62
8.1 General . 62
8.2 Dielectric test on the main circuit . 63
8.3 Tests on auxiliary and control circuits . 63
8.3.1 Inspection of auxiliary and control circuits, and verification of conformity
to the circuit diagrams and wiring diagrams . 63
8.3.2 Functional tests . 63
8.3.3 Verification of protection against electrical shock . 63
8.3.4 Dielectric tests . 63
8.4 Measurement of the resistance of the main circuit . 63
8.5 Tightness test . 64
8.6 Design and visual checks . 64
8.101 Partial discharge measurement . 64
8.102 Mechanical operation tests . 64
8.103 Pressure tests of gas-filled compartments . 64
8.104 Tests after erection on site. 65
8.105 Measurement of fluid condition after filling on site . 65
9 Guide to the selection of switchgear and controlgear (informative) . 65
9.1 General . 65
9.2 Selection of rated values . 66
9.3 Cable-interface considerations . 66
9.4 Continuous or temporary overload due to changed service conditions . 66
9.5 Environmental aspects . 66
REDLINE VERSION – 6 – IEC 62271-200:2021+AMD1:2024 CSV
IEC 2024
9.101 Selection of design and construction . 66
9.101.1 General . 66
9.101.2 Architecture and accessibility to high-voltage compartments . 67
9.101.3 Service continuity of the switchgear . 68
9.101.4 Partition classes . 70
9.102 Ratings related to earthing circuits . 71
9.103 Internal arc fault . 71
9.103.1 General . 71
9.103.2 Causes and preventive measures . 71
9.103.3 Supplementary protective measures . 72
9.103.4 Considerations for the selection and installation . 73
9.103.5 Internal arc test . 74
9.104 Summary of technical requirements, ratings and optional tests . 77
10 Information to be given with enquiries, tenders and orders (informative) . 79
10.1 General . 79
10.2 Information with enquiries and orders . 79
10.3 Information with tenders . 80
11 Transport, storage, installation, operating instructions and maintenance . 81
11.1 General . 81
11.2 Conditions during transport, storage and installation . 81
11.3 Installation . 81
11.4 Operating instructions . 81
11.5 Maintenance . 82
12 Safety . 82
12.101 Procedures . 82
12.102 Internal arc aspects . 82
13 Influence of the product on the environment . 83
Annex A (normative) Internal arc fault – Method to verify the internal arc classification
(IAC) . 84
A.1 Room simulation . 84
A.1.1 Room simulation for indoor assemblies . 84
A.1.2 Room simulation for outdoor assemblies . 86
A.2 Indicators (for assessing the thermal effects of the gases) . 86
A.2.1 General . 86
A.2.2 Arrangement of indicators . 86
A.3 Tolerances for geometrical dimensions of test arrangements . 88
A.4 Test parameters . 88
A.4.1 General . 88
A.4.2 Voltage . 88
A.4.3 Current . 88
A.4.4 Frequency . 89
A.5 Test procedure. 89
A.5.1 Supply circuit . 89
A.5.2 Arc initiation . 90
Annex B (normative) Partial discharge measurement . 101
B.1 General . 101
B.2 Application . 101
B.3 Test circuits and measuring instruments . 101
IEC 2024
B.4 Test procedure. 102
B.5 Maximum permissible partial discharge quantity . 103
Annex C (informative) List of notes concerning certain countries . 107
Annex D (normative) Flowchart categorization procedure for LSC for a given
functional unit FU1 with connection compartment . 108
Annex E (informative) Pressure coordination chart for gas-filled compartments . 109
Bibliography . 110
Figure 1 – LSC1. 70
Figure 2 – LSC2. 70
Figure 3 – LSC2. 70
Figure 4 – LSC2. 70
Figure 5 – LSC2A . 70
Figure 6 – LSC2B . 70
Figure 7 – LSC2B . 70
Figure 8 – LSC1 No LSC assigned . 70
Figure 9 – No LSC assigned . 70
Figure A.1 – Mounting frame for vertical indicators . 92
Figure A.2 – Horizontal indicator . 92
Figure A.3 – Position of the indicators. 93
Figure A.4 – Room simulation and indicator positioning for accessibility type A,
classified rear side, ceiling above 2 000 mm, functional unit of any height . 94
Figure A.5 – Room simulation and indicator positioning for accessibility type A,
non-accessible rear side, ceiling at 2 000 mm, so functional unit ≤ 1 800 mm high. 95
Figure A.6 – Room simulation and indicator positioning for accessibility type B,
classified rear side, functional unit ≥ 1 900 mm high . 96
Figure A.7 – Room simulation and indicator positioning for accessibility type B,
classified rear side, functional unit < 1 900 mm high . 97
Figure A.8 – Ceiling height stated from the floor or false floor level where the assembly
is actually placed . 98
Figure A.9 – Indicator positioning in case of protrusion at < 2 000 mm height, at
classified side . 99
Figure A.10 – Indicator positioning in case a bottom exhaust duct belonging to the
assembly is defined as a walkable integrated part of the false floor . 100
Figure B.1 – Partial discharge test circuit (three-phase arrangement) . 105
Figure B.2 – Partial-discharge test circuit (system without earthed neutral) . 106
Figure D.1 – Flowchart categorization procedure for LSC for a given functional unit
FU1 with connection compartment . 108
Figure E.1 – Example of pressure coordination chart . 109
Table 1 – Nameplate information . 30
Table 2 – Locations, causes and examples of measures to decrease the probability of
internal arc faults . 73
Table 3 – Single-phase-to-earth arc fault current depending on the network neutral
earthing . 75
Table 4 – Summary of technical requirements, ratings and optional tests for
assemblies . 77
REDLINE VERSION – 8 – IEC 62271-200:2021+AMD1:2024 CSV
IEC 2024
Table A.1 – Parameters for internal arc test according to compartment construction . 91
Table B.1 – Test circuits and procedures . 104
IEC 2024
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
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shall not be held responsible for identifying any or all such patent rights.
This consolidated version of the official IEC Standard and its amendment has been
prepared for user convenience.
IEC 62271-200 edition 3.1 contains the third edition (2021-05) [documents 17C/782/FDIS
and 17C/792/RVD] and its amendment 1 (2024-06) [documents 17C/933/FDIS and
17C/938/RVD].
In this Redline version, a vertical line in the margin shows where the technical content is
modified by amendment 1. Additions are in green text, deletions are in strikethrough red
text. A separate Final version with all changes accepted is available in this publication.
REDLINE VERSION – 10 – IEC 62271-200:2021+AMD1:2024 CSV
IEC 2024
IEC 62271-200 has been prepared by subcommittee 17C: Assemblies, of IEC technical
committee 17: High-voltage switchgear and controlgear. It is an International Standard.
This third edition cancels and replaces the second edition published in 2011. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) clause numbering aligned with IEC 62271-1:2017, including the adoption of the subclause
names of Clause 3;
b) in Clause 3 specific definitions are added for "in service", "normal operating condition" and
"normal use";
c) internal arc testing on pole-mounted switchgear is taken out of this document, as it is now
covered by the specific standard IEC 62271-214:2019;
d) a more precise description of earthing circuit is given with the inclusion of ratings and test
requirements;
e) number of mechanical tests on interlocks is reduced for type testing; a more precise
description of forces to apply during type testing is given (refer to 7.102);
f) resistance measuring on main circuit is only needed before continuous current tests (as
reference for routine tests) and no longer needed after this continuous current test.
Rationale for this deletion is that this measured resistance does not mean anything; as the
temperature rise test was just finished, a new temperature rise test will not give new
information;
g) IEC 62271-100:2021, IEC 62271-103:2021, IEC 62271-105:2021 and IEC 62271-
106:2021 are referred to in the document;
h) IEC 62271-107:2019 and IEC IEEE 62271-37-013:2015 are also considered in 7.101.2;
i) a more precise description of LSC category is given with the inclusion of an explanatory
flowchart (Annex D);
j) examples not covered by the IAC test are transferred from Clause 6 to 9.103;
k) the term "assembly" is defined in Clause 3 and used as synonym for "metal-enclosed
switchgear and controlgear" in this document;
l) "metallic" is replaced by "metal" where applicable;
m) 6.105 is now covered by 7.7;
n) a 1 s rule was introduced for Criterion 4 during IAC tests regarding hot gases versus glowing
particles as cause of ignition;
o) a more precise description of internal arc tests for switchgear with protrusions is given in
Annex A.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
This document should be read in conjunction with IEC 62271-1:2017, 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 62271-1:2017. Amendments to these clauses and subclauses are given under the same
numbering, whilst additional subclauses, are numbered from 101.
The reader's attention is drawn to the fact that Annex C lists all of the "in-some-country" clauses
on differing practices of a less permanent nature relating to the subject of this document.
------------
...
IEC 62271-200 ®
Edition 3.0 2021-05
INTERNATIONAL
STANDARD
colour
inside
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
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IEC 62271-200 ®
Edition 3.0 2021-05
INTERNATIONAL
STANDARD
colour
inside
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
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.130.10 ISBN 978-2-8322-9793-3
– 2 – IEC 62271-200:2021 IEC 2021
CONTENTS
FOREWORD . 6
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 11
3.1 General terms and definitions . 11
3.2 Assemblies of switchgear and controlgear . 13
3.3 Parts of assemblies . 13
3.4 Switching devices . 13
3.5 Parts of switchgear and controlgear . 13
3.6 Operational characteristics of switchgear and controlgear . 16
3.7 Characteristic quantities . 18
3.8 Index of definitions . 19
4 Normal and special service conditions . 20
5 Ratings . 21
5.1 General . 21
5.2 Rated voltage (U ) . 21
r
5.3 Rated insulation level (U , U , U ) . 21
d p s
5.4 Rated frequency (f ) . 21
r
5.5 Rated continuous current (I ) . 21
r
5.6 Rated short-time withstand currents (I , I ) . 21
k ke
5.7 Rated peak withstand currents (I , I ) . 22
p pe
5.8 Rated durations of short-circuit (t , t ) . 22
k ke
5.9 Rated supply voltage of auxiliary and control circuits (U ) . 23
a
5.10 Rated supply frequency of auxiliary and control circuits . 23
5.11 Rated pressure of compressed gas supply for controlled pressure systems . 23
5.101 Classification of earthing function through main switching device . 23
5.102 Rated cable test voltages (U , U ) . 23
ct (AC) ct (DC)
5.103 Ratings of the internal arc classification (IAC) . 23
6 Design and construction . 25
6.1 Requirements for liquids in switchgear and controlgear . 25
6.2 Requirements for gases in switchgear and controlgear . 25
6.3 Earthing of switchgear and controlgear . 25
6.4 Auxiliary and control equipment and circuits . 26
6.5 Dependent power operation . 26
6.6 Stored energy operation. 26
6.7 Independent unlatched operation (independent manual or power operation) . 26
6.8 Manually operated actuators . 26
6.9 Operation of releases. 26
6.10 Pressure/level indication . 27
6.11 Nameplates . 27
6.12 Locking devices . 28
6.13 Position indication . 29
6.14 Degrees of protection provided by enclosures . 29
6.15 Creepage distances for outdoor insulators . 30
6.16 Gas and vacuum tightness . 30
6.17 Tightness for liquid systems . 30
6.18 Fire hazard (flammability) . 30
6.19 Electromagnetic compatibility (EMC) . 30
6.20 X-ray emission . 30
6.21 Corrosion . 30
6.22 Filling levels for insulation, switching and/or operation . 30
6.101 General requirements for assemblies . 31
6.102 Metal enclosure . 31
6.103 High-voltage compartments . 33
6.104 Removable parts . 37
6.105 Provisions for dielectric tests on cables . 37
6.106 Internal arc fault . 38
7 Type tests . 38
7.1 General . 38
7.2 Dielectric tests . 39
7.3 Radio interference voltage (RIV) test . 43
7.4 Resistance measurement . 43
7.5 Continuous current tests . 43
7.6 Short-time withstand current and peak withstand current tests . 45
7.7 Verification of the protection . 47
7.8 Tightness tests . 47
7.9 Electromagnetic compatibility tests (EMC) . 48
7.10 Additional tests on auxiliary and control circuits . 48
7.11 X-radiation test for vacuum interrupters . 48
7.101 Verification of making and breaking capacities . 48
7.102 Mechanical operation tests . 50
7.103 Pressure withstand test for gas-filled compartments . 51
7.104 Tests to verify the protection of persons against dangerous electrical effects . 52
7.105 Internal arc test . 53
8 Routine tests . 57
8.1 General . 57
8.2 Dielectric test on the main circuit . 57
8.3 Tests on auxiliary and control circuits . 57
8.4 Measurement of the resistance of the main circuit . 58
8.5 Tightness test . 58
8.6 Design and visual checks . 58
8.101 Partial discharge measurement . 58
8.102 Mechanical operation tests . 58
8.103 Pressure tests of gas-filled compartments . 59
8.104 Tests after erection on site. 59
8.105 Measurement of fluid condition after filling on site . 59
9 Guide to the selection of switchgear and controlgear (informative) . 59
9.1 General . 59
9.2 Selection of rated values . 60
9.3 Cable-interface considerations . 60
– 4 – IEC 62271-200:2021 IEC 2021
9.4 Continuous or temporary overload due to changed service conditions . 60
9.5 Environmental aspects . 60
9.101 Selection of design and construction . 60
9.102 Ratings related to earthing circuits . 64
9.103 Internal arc fault . 65
9.104 Summary of technical requirements, ratings and optional tests . 71
10 Information to be given with enquiries, tenders and orders (informative) . 73
10.1 General . 73
10.2 Information with enquiries and orders . 73
10.3 Information with tenders . 74
11 Transport, storage, installation, operating instructions and maintenance . 75
11.1 General . 75
11.2 Conditions during transport, storage and installation . 75
11.3 Installation . 75
11.4 Operating instructions . 75
11.5 Maintenance . 76
12 Safety . 76
12.101 Procedures . 76
12.102 Internal arc aspects . 76
13 Influence of the product on the environment . 77
Annex A (normative) Internal arc fault – Method to verify the internal arc classification
(IAC) . 78
A.1 Room simulation . 78
A.2 Indicators (for assessing the thermal effects of the gases) . 80
A.3 Tolerances for geometrical dimensions of test arrangements . 82
A.4 Test parameters . 82
A.5 Test procedure. 83
Annex B (normative) Partial discharge measurement . 95
B.1 General . 95
B.2 Application . 95
B.3 Test circuits and measuring instruments . 95
B.4 Test procedure. 96
B.5 Maximum permissible partial discharge quantity . 97
Annex C (informative) List of notes concerning certain countries . 101
Annex D (normative) Flowchart categorization procedure for LSC for a given
functional unit FU1 with connection compartment . 102
Bibliography . 103
Figure 1 – LSC1. 63
Figure 2 – LSC2. 63
Figure 3 – LSC2. 63
Figure 4 – LSC2. 64
Figure 5 – LSC2A . 64
Figure 6 – LSC2B . 64
Figure 7 – LSC2B . 64
Figure 8 – LSC1. 64
Figure 9 – No LSC assigned . 64
Figure A.1 – Mounting frame for vertical indicators . 86
Figure A.2 – Horizontal indicator . 86
Figure A.3 – Position of the indicators. 87
Figure A.4 – Room simulation and indicator positioning for accessibility type A,
classified rear side, ceiling above 2 000 mm, functional unit of any height . 88
Figure A.5 – Room simulation and indicator positioning for accessibility type A,
non-accessible rear side, ceiling at 2 000 mm, so functional unit ≤ 1 800 mm high. 89
Figure A.6 – Room simulation and indicator positioning for accessibility type B,
classified rear side, functional unit ≥ 1 900 mm high . 90
Figure A.7 – Room simulation and indicator positioning for accessibility type B,
classified rear side, functional unit < 1 900 mm high . 91
Figure A.8 – Ceiling height stated from the floor or false floor level where the assembly
is actually placed . 92
Figure A.9 – Indicator positioning in case of protrusion at < 2 000 mm height, at
classified side . 93
Figure A.10 – Indicator positioning in case a bottom exhaust duct belonging to the
assembly is defined as a walkable integrated part of the false floor . 94
Figure B.1 – Partial discharge test circuit (three-phase arrangement) . 99
Figure B.2 – Partial-discharge test circuit (system without earthed neutral) . 100
Figure D.1 – Flowchart categorization procedure for LSC for a given functional unit
FU1 with connection compartment . 102
Table 1 – Nameplate information . 27
Table 2 – Locations, causes and examples of measures to decrease the probability of
internal arc faults . 67
Table 3 – Single-phase-to-earth arc fault current depending on the network neutral
earthing . 69
Table 4 – Summary of technical requirements, ratings and optional tests for
assemblies . 71
Table A.1 – Parameters for internal arc test according to compartment construction . 85
Table B.1 – Test circuits and procedures . 98
– 6 – IEC 62271-200:2021 IEC 2021
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,
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preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
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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
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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
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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.
IEC 62271-200 has been prepared by subcommittee 17C: Assemblies, of IEC technical
committee 17: High-voltage switchgear and controlgear. It is an International Standard.
This third edition cancels and replaces the second edition published in 2011. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) clause numbering aligned with IEC 62271-1:2017, including the adoption of the subclause
names of Clause 3;
b) in Clause 3 specific definitions are added for "in service", "normal operating condition" and
"normal use";
c) internal arc testing on pole-mounted switchgear is taken out of this document, as it is now
covered by the specific standard IEC 62271-214:2019;
d) a more precise description of earthing circuit is given with the inclusion of ratings and test
requirements;
e) number of mechanical tests on interlocks is reduced for type testing; a more precise
description of forces to apply during type testing is given (refer to 7.102);
f) resistance measuring on main circuit is only needed before continuous current tests (as
reference for routine tests) and no longer needed after this continuous current test.
Rationale for this deletion is that this measured resistance does not mean anything; as the
temperature rise test was just finished, a new temperature rise test will not give new
information;
g) IEC 62271-100:2021, IEC 62271-103:2021, IEC 62271-105:2021 and IEC 62271-
106:2021 are referred to in the document;
h) IEC 62271-107:2019 and IEC IEEE 62271-37-013:2015 are also considered in 7.101.2;
i) a more precise description of LSC category is given with the inclusion of an explanatory
flowchart (Annex D);
j) examples not covered by the IAC test are transferred from Clause 6 to 9.103;
k) the term "assembly" is defined in Clause 3 and used as synonym for "metal-enclosed
switchgear and controlgear" in this document;
l) "metallic" is replaced by "metal" where applicable;
m) 6.105 is now covered by 7.7;
n) a 1 s rule was introduced for Criterion 4 during IAC tests regarding hot gases versus glowing
particles as cause of ignition;
o) a more precise description of internal arc tests for switchgear with protrusions is given in
Annex A.
The text of this International Standard is based on the following documents:
FDIS Report on voting
17C/782/FDIS 17C/792/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
This document should be read in conjunction with IEC 62271-1:2017, 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 62271-1:2017. Amendments to these clauses and subclauses are given under the same
numbering, whilst additional subclauses, are numbered from 101.
The reader's attention is drawn to the fact that Annex C lists all of the "in-some-country" clauses
on differing practices of a less permanent nature relating to the subject of this document.
A list of all parts in the IEC 62271 series, published under the general title High-voltage
switchgear and controlgear, can be found on the IEC website.
– 8 – IEC 62271-200:2021 IEC 2021
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under 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.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.
INTRODUCTION
High-voltage (IEC 60050-601:1985, 601-01-27) switchgear refers to rated voltages above 1 kV.
However, medium-voltage is commonly used for distribution systems with rated voltages above
1 kV and generally applied up to and including 52 kV; refer to IEC 60050-601:1985, 601-01-28
[1] .
Although primarily dedicated to three-phase systems, this document can also be applied to
single-phase and two-phase systems.
Switchgear and controlgear assemblies having a solid-insulation enclosure are covered by
IEC 62271-201.
____________
Numbers in square brackets refer to the Bibliography.
– 10 – IEC 62271-200:2021 IEC 2021
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 Scope
This part of IEC 62271 is applicable to prefabricated metal-enclosed switchgear and controlgear
assemblies designed for:
– alternating current;
– rated voltages above 1 kV and up to and including 52 kV;
– service frequencies up to and including 60 Hz;
– indoor and outdoor installation.
The assembly can include air-insulated and/or fluid-filled compartments.
For components installed in a metal-enclosed switchgear and controlgear, this document
supplements or even replaces in some cases, the requirements as stated by the individual
product standards.
The list of components which can be inside the metal-enclosed switchgear and controlgear is
not limited to the ones explicitly cited in this document.
2 Normative references
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.
IEC 60050-151, International Electrotechnical Vocabulary (IEV) – Part 151: Electrical and
magnetic devices (available at http://www.electropedia.org)
IEC 60050-441, International Electrotechnical Vocabulary (IEV) – Part 441: Switchgear,
controlgear and fuses (available at http://www.electropedia.org)
IEC 60060-1:2010, High-voltage test techniques – Part 1: General definitions and test
requirements
IEC 60270:2000, High-voltage test techniques – Partial discharge measurements
IEC 60270:2000/AMD1:2015
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
IEC 60529:1989/AMD1:1999
IEC 60529:1989/AMD2:2013
IEC 62262:2002, Degrees of protection provided by enclosures for electrical equipment against
external mechanical impacts (IK code)
IEC 62271-1:2017, High-voltage switchgear and controlgear – Part 1: Common specifications
for alternating current switchgear and controlgear
IEC 62271-100:2021, High-voltage switchgear and controlgear – Part 100: Alternating-current
circuit-breakers
IEC 62271-102:2018, High-voltage switchgear and controlgear – Part 102: Alternating current
disconnectors and earthing switches
IEC 62271-103:2021, High-voltage switchgear and controlgear – Part 103: Switches for rated
voltages above 1 kV up to and including 52 kV
IEC 62271-105:2021, High-voltage switchgear and controlgear – Part 105: Alternating current
switch-fuse combinations for rated voltages above 1 kV up to and including 52 kV
IEC 62271-106:2021, High-voltage switchgear and controlgear – Part 106: Alternating current
contactors, contactor-based controllers and motor-starters
IEC 62271-107:2019, High-voltage switchgear and controlgear – Part 107: Alternating current
fused circuit-switchers for rated voltages above 1 kV up to and including 52 kV
IEC 62271-201:2014, High-voltage switchgear and controlgear – Part 201: AC solid-insulation
enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including
52 kV
IEC 62271-203:2011, High-voltage switchgear and controlgear – Part 203: Gas-insulated
metal-enclosed switchgear for rated voltages above 52 kV
IEC 62271-213:2021, High-voltage switchgear and controlgear – Part 213: Voltage detecting
and indicating system
IEC 62271-215:2021, High-voltage switchgear and controlgear – Part 215: Phase comparator
used with VDIS
IEC IEEE 62271-37-013:2015, High-voltage switchgear and controlgear – Part 37-013:
Alternating-current generator circuit-breakers
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 62271-1, IEC 60050-151
and IEC 60050-441, and the following apply.
NOTE The classification system for definitions of IEC 62271-1:2017 is followed. Terms and definitions are
referenced and prioritized in the following order:
– Clause 3 of this document;
– IEC 62271-1:2017;
– IEC 60050-441;
– IEC 60050-151.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1 General terms and definitions
The definitions in 3.1 of IEC 62271-1:2017 are applicable, with the following additions and/or
modifications:
– 12 – IEC 62271-200:2021 IEC 2021
3.1.101
ambient air temperature
temperature, determined under specified conditions, of the air surrounding
the enclosure of an assembly
[SOURCE: IEC 60050-441:1984, 441-11-13, modified – "prescribed" has been replaced by
"specified", "complete switching device or fuse" by "enclosure of an assembly" and the note has
been removed.]
3.1.102
disruptive discharge
phenomenon associated with the failure of insulation under electric stress, in which the
discharge completely bridges the insulation under test, reducing the voltage between the
electrodes to zero or nearly to zero
Note 1 to entry: The term is applicable to discharges in solid, liquid and gaseous dielectrics and to combinations of
these.
Note 2 to entry: A disruptive discharge in a solid dielectric produces permanent loss of dielectric strength (non-
self-restoring insulation); in a liquid or gaseous dielectric, the loss can be only temporary (self-restoring insulation).
Note 3 to entry: The term "sparkover" is used when a disruptive discharge occurs in a gaseous or liquid dielectric.
The term "flashover" is used when a disruptive discharge occurs over the surface of a solid dielectric in gaseous or
liquid medium. The term "puncture" is used when a disruptive discharge occurs through a solid dielectric.
3.1.103
relative pressure
pressure that refers to the local atmospheric pressure
Note 1 to entry: When defining a filling level it is in reference to the standard atmospheric pressure of 101,3 kPa,
as defined in IEC 62271-1.
3.1.104
segregation
arrangement of conductors with earthed metal interposed between them in
such a manner that disruptive discharges can only occur to earth
Note 1 to entry: A segregation can be established between the conductors as well as between the open contacts of
a switching device like a disconnector.
Note 2 to entry: This definition does not specify any mechanical protection (IP and IK).
[SOURCE: IEC 60050-441:1984, 441-11-11, modified – Notes to entry have been added.]
3.1.105
in service
condition where at least one high voltage part in the assembly is
energized
3.1.106
normal operating condition
in service condition with all doors and covers properly closed and secured
3.1.107
normal use
use of the assembly as defined by the manufacturer's instructions reference,
corresponding to the conditions and operations in service
Note 1 to entry: "normal use" may include maintenance activities within an accessible high-voltage compartment.
3.2 Assemblies of switchgear and controlgear
The definitions in 3.2 of IEC 62271-1:2017 are applicable, with the following additions and/or
modifications:
3.2.101
metal-enclosed switchgear and controlgear
assembly
switchgear and controlgear assemblies with a metal enclosure intended to be earthed, and
complete except for external connections
Note 1 to entry: This term generally is applicable to high-voltage switchgear and controlgear.
Note 2 to entry: The term "external connections" corresponds to "external conductors (cables or bars) connecting
the assembly to the network or an external installation".
[SOURCE: IEC 60050-441:1984, 441-12-04, modified – The second preferred term "assembly"
and Note 2 to entry have been added and in the definition "external" has been deleted.]
3.2.102
multi-tier design
design of an assembly in which the main switching devices of two or more functional units are
arranged vertically (one above the other) within a common enclosure
3.3 Parts of assemblies
The definitions in 3.3 of IEC 62271-1:2017 are applicable.
3.4 Switching devices
The definitions in 3.4 of IEC 62271-1:2017 are applicable.
3.5 Parts of switchgear and controlgear
The definitions in 3.5 of IEC 62271-1:2017 are applicable, with the following additions and/or
modifications:
3.5.101
enclosure
part of an assembly 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
[SOURCE: IEC 60050-441:1984, 441-13-01]
3.5.102
metal enclosure
outermost enclosure made of metal, which can be composed of several
elements, enclosing all high-voltage parts
3.5.103
functional unit
part of an assembly comprising the main circuits, earthing circuit and auxiliary
circuits that contribute to the fulfilment of a single function
Note 1 to entry: Functional units can be distinguished according to the function for which they are intended, e.g.,
incoming unit, through which electrical energy is normally fed into the assembly, outgoing unit, through which
electrical energy is normally supplied to one or more external circuits
– 14 – IEC 62271-200:2021 IEC 2021
[SOURCE: IEC 60050-441:1984, 441-13-04, modified – "of switchgear and controlgear" and "all
the components of" have been deleted; "earthing circuit" has been added.]
3.5.104
component
essential part of the high-voltage or earthing circuits of an assembly which
serves a specific function (e.g. circuit-breaker, disconnector, switch, fuse, earthing switch,
instrument transformer, bushing, busbar)
3.5.105
main circuit
all the high-voltage conductive parts of an assembly included in a circuit
which is intended to carry the rated continuous current
[SOURCE: IEC 60050-441:1984, 441-13-02, modified – "high voltage" is added and "transmit
electrical energy" is replaced by "carry the rated continuous current".]
3.5.106
auxiliary circuit
all the conductive parts of an assembly of switchgear and controlgear
included in a circuit (other than the high-voltage parts) intended to control, measure, signal and
regulate
Note 1 to entry: The auxiliary circuits of an assembly include the control and auxiliary circuits of the switching
devices.
[SOURCE: IEC 60050-441:1984, 441-13-03, modified – "main circuit" is replaced by "high-
voltage parts".]
3.5.107
earthing circuit
conductors, connections, and the conducting parts of earthing devices or of
the metal frame, intended to connect the high-voltage conductive parts of an assembly to the
earthing point provided
Note 1 to entry: The earthing circuit can include short-circuiting circuits between poles and phase-to-earth circuits
from each pole to the earthing point and/or from the short-circuiting point of phase-to-earth circuits to the earthing
point provided.
3.5.108
earthing point
terminal which is provided on the assembly for connection of the intended
earthed parts of the assembly to the earth system of the installation
3.5.109
high-voltage compartment
compartment of an assembly containing high-voltage conducting parts,
enclosed except for openings necessary for interconnection, control or ventilation
Note 1 to entry: A general definition of "compartment" is provided in IEC 60050-441:1984, 441-13-05, as "a part of
an assembly enclosed except for openings necessary for interconnection, control or ventilation".
3.5.110
interlock-controlled accessible compartment
high-voltage compartment designed to be opened for normal use, in which access is controlled
by the integral design of the assembly
3.5.111
procedure-based accessible compartment
high-voltage compartment designed to be opened for normal use, in which access is controlled
by a suitable procedure combined with locking
3.5.112
tool-based accessible compartment
high-voltage compartment that can be opened only through the use of tools, but not designed
...
IEC 62271-200 ®
Edition 3.0 2021-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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
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IEC 62271-200 ®
Edition 3.0 2021-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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
INTERNATIONALE
ICS 29.130.10 ISBN 978-2-8322-1007-3
– 2 – IEC 62271-200:2021 IEC 2021
CONTENTS
FOREWORD . 6
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 11
3.1 General terms and definitions . 11
3.2 Assemblies of switchgear and controlgear . 13
3.3 Parts of assemblies . 13
3.4 Switching devices . 13
3.5 Parts of switchgear and controlgear . 13
3.6 Operational characteristics of switchgear and controlgear . 16
3.7 Characteristic quantities . 18
3.8 Index of definitions . 19
4 Normal and special service conditions . 20
5 Ratings . 21
5.1 General . 21
5.2 Rated voltage (U ) . 21
r
5.3 Rated insulation level (U , U , U ) . 21
d p s
5.4 Rated frequency (f ) . 21
r
5.5 Rated continuous current (I ) . 21
r
5.6 Rated short-time withstand currents (I , I ) . 21
k ke
5.7 Rated peak withstand currents (I , I ) . 22
p pe
5.8 Rated durations of short-circuit (t , t ) . 22
k ke
5.9 Rated supply voltage of auxiliary and control circuits (U ) . 23
a
5.10 Rated supply frequency of auxiliary and control circuits . 23
5.11 Rated pressure of compressed gas supply for controlled pressure systems . 23
5.101 Classification of earthing function through main switching device . 23
5.102 Rated cable test voltages (U , U ) . 23
ct (AC) ct (DC)
5.103 Ratings of the internal arc classification (IAC) . 23
6 Design and construction . 25
6.1 Requirements for liquids in switchgear and controlgear . 25
6.2 Requirements for gases in switchgear and controlgear . 25
6.3 Earthing of switchgear and controlgear . 25
6.4 Auxiliary and control equipment and circuits . 26
6.5 Dependent power operation . 26
6.6 Stored energy operation. 26
6.7 Independent unlatched operation (independent manual or power operation) . 26
6.8 Manually operated actuators . 26
6.9 Operation of releases. 26
6.10 Pressure/level indication . 27
6.11 Nameplates . 27
6.12 Locking devices . 28
6.13 Position indication . 29
6.14 Degrees of protection provided by enclosures . 29
6.15 Creepage distances for outdoor insulators . 30
6.16 Gas and vacuum tightness . 30
6.17 Tightness for liquid systems . 30
6.18 Fire hazard (flammability) . 30
6.19 Electromagnetic compatibility (EMC) . 30
6.20 X-ray emission . 30
6.21 Corrosion . 30
6.22 Filling levels for insulation, switching and/or operation . 30
6.101 General requirements for assemblies . 31
6.102 Metal enclosure . 31
6.103 High-voltage compartments . 33
6.104 Removable parts . 37
6.105 Provisions for dielectric tests on cables . 37
6.106 Internal arc fault . 38
7 Type tests . 38
7.1 General . 38
7.2 Dielectric tests . 39
7.3 Radio interference voltage (RIV) test . 43
7.4 Resistance measurement . 43
7.5 Continuous current tests . 43
7.6 Short-time withstand current and peak withstand current tests . 45
7.7 Verification of the protection . 47
7.8 Tightness tests . 47
7.9 Electromagnetic compatibility tests (EMC) . 48
7.10 Additional tests on auxiliary and control circuits . 48
7.11 X-radiation test for vacuum interrupters . 48
7.101 Verification of making and breaking capacities . 48
7.102 Mechanical operation tests . 50
7.103 Pressure withstand test for gas-filled compartments . 51
7.104 Tests to verify the protection of persons against dangerous electrical effects . 52
7.105 Internal arc test . 53
8 Routine tests . 57
8.1 General . 57
8.2 Dielectric test on the main circuit . 57
8.3 Tests on auxiliary and control circuits . 57
8.4 Measurement of the resistance of the main circuit . 58
8.5 Tightness test . 58
8.6 Design and visual checks . 58
8.101 Partial discharge measurement . 58
8.102 Mechanical operation tests . 58
8.103 Pressure tests of gas-filled compartments . 59
8.104 Tests after erection on site. 59
8.105 Measurement of fluid condition after filling on site . 59
9 Guide to the selection of switchgear and controlgear (informative) . 59
9.1 General . 59
9.2 Selection of rated values . 60
9.3 Cable-interface considerations . 60
– 4 – IEC 62271-200:2021 IEC 2021
9.4 Continuous or temporary overload due to changed service conditions . 60
9.5 Environmental aspects . 60
9.101 Selection of design and construction . 60
9.102 Ratings related to earthing circuits . 64
9.103 Internal arc fault . 65
9.104 Summary of technical requirements, ratings and optional tests . 71
10 Information to be given with enquiries, tenders and orders (informative) . 73
10.1 General . 73
10.2 Information with enquiries and orders . 73
10.3 Information with tenders . 74
11 Transport, storage, installation, operating instructions and maintenance . 75
11.1 General . 75
11.2 Conditions during transport, storage and installation . 75
11.3 Installation . 75
11.4 Operating instructions . 75
11.5 Maintenance . 76
12 Safety . 76
12.101 Procedures . 76
12.102 Internal arc aspects . 76
13 Influence of the product on the environment . 77
Annex A (normative) Internal arc fault – Method to verify the internal arc classification
(IAC) . 78
A.1 Room simulation . 78
A.2 Indicators (for assessing the thermal effects of the gases) . 80
A.3 Tolerances for geometrical dimensions of test arrangements . 82
A.4 Test parameters . 82
A.5 Test procedure. 83
Annex B (normative) Partial discharge measurement . 95
B.1 General . 95
B.2 Application . 95
B.3 Test circuits and measuring instruments . 95
B.4 Test procedure. 96
B.5 Maximum permissible partial discharge quantity . 97
Annex C (informative) List of notes concerning certain countries . 101
Annex D (normative) Flowchart categorization procedure for LSC for a given
functional unit FU1 with connection compartment . 102
Bibliography . 103
Figure 1 – LSC1. 63
Figure 2 – LSC2. 63
Figure 3 – LSC2. 63
Figure 4 – LSC2. 64
Figure 5 – LSC2A . 64
Figure 6 – LSC2B . 64
Figure 7 – LSC2B . 64
Figure 8 – LSC1. 64
Figure 9 – No LSC assigned . 64
Figure A.1 – Mounting frame for vertical indicators . 86
Figure A.2 – Horizontal indicator . 86
Figure A.3 – Position of the indicators. 87
Figure A.4 – Room simulation and indicator positioning for accessibility type A,
classified rear side, ceiling above 2 000 mm, functional unit of any height . 88
Figure A.5 – Room simulation and indicator positioning for accessibility type A,
non-accessible rear side, ceiling at 2 000 mm, so functional unit ≤ 1 800 mm high. 89
Figure A.6 – Room simulation and indicator positioning for accessibility type B,
classified rear side, functional unit ≥ 1 900 mm high . 90
Figure A.7 – Room simulation and indicator positioning for accessibility type B,
classified rear side, functional unit < 1 900 mm high . 91
Figure A.8 – Ceiling height stated from the floor or false floor level where the assembly
is actually placed . 92
Figure A.9 – Indicator positioning in case of protrusion at < 2 000 mm height, at
classified side . 93
Figure A.10 – Indicator positioning in case a bottom exhaust duct belonging to the
assembly is defined as a walkable integrated part of the false floor . 94
Figure B.1 – Partial discharge test circuit (three-phase arrangement) . 99
Figure B.2 – Partial-discharge test circuit (system without earthed neutral) . 100
Figure D.1 – Flowchart categorization procedure for LSC for a given functional unit
FU1 with connection compartment . 102
Table 1 – Nameplate information . 27
Table 2 – Locations, causes and examples of measures to decrease the probability of
internal arc faults . 67
Table 3 – Single-phase-to-earth arc fault current depending on the network neutral
earthing . 69
Table 4 – Summary of technical requirements, ratings and optional tests for
assemblies . 71
Table A.1 – Parameters for internal arc test according to compartment construction . 85
Table B.1 – Test circuits and procedures . 98
– 6 – IEC 62271-200:2021 IEC 2021
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
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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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
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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.
IEC 62271-200 has been prepared by subcommittee 17C: Assemblies, of IEC technical
committee 17: High-voltage switchgear and controlgear. It is an International Standard.
This third edition cancels and replaces the second edition published in 2011. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) clause numbering aligned with IEC 62271-1:2017, including the adoption of the subclause
names of Clause 3;
b) in Clause 3 specific definitions are added for "in service", "normal operating condition" and
"normal use";
c) internal arc testing on pole-mounted switchgear is taken out of this document, as it is now
covered by the specific standard IEC 62271-214:2019;
d) a more precise description of earthing circuit is given with the inclusion of ratings and test
requirements;
e) number of mechanical tests on interlocks is reduced for type testing; a more precise
description of forces to apply during type testing is given (refer to 7.102);
f) resistance measuring on main circuit is only needed before continuous current tests (as
reference for routine tests) and no longer needed after this continuous current test.
Rationale for this deletion is that this measured resistance does not mean anything; as the
temperature rise test was just finished, a new temperature rise test will not give new
information;
g) IEC 62271-100:2021, IEC 62271-103:2021, IEC 62271-105:2021 and IEC 62271-
106:2021 are referred to in the document;
h) IEC 62271-107:2019 and IEC IEEE 62271-37-013:2015 are also considered in 7.101.2;
i) a more precise description of LSC category is given with the inclusion of an explanatory
flowchart (Annex D);
j) examples not covered by the IAC test are transferred from Clause 6 to 9.103;
k) the term "assembly" is defined in Clause 3 and used as synonym for "metal-enclosed
switchgear and controlgear" in this document;
l) "metallic" is replaced by "metal" where applicable;
m) 6.105 is now covered by 7.7;
n) a 1 s rule was introduced for Criterion 4 during IAC tests regarding hot gases versus glowing
particles as cause of ignition;
o) a more precise description of internal arc tests for switchgear with protrusions is given in
Annex A.
The text of this International Standard is based on the following documents:
FDIS Report on voting
17C/782/FDIS 17C/792/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
This document should be read in conjunction with IEC 62271-1:2017, 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 62271-1:2017. Amendments to these clauses and subclauses are given under the same
numbering, whilst additional subclauses, are numbered from 101.
The reader's attention is drawn to the fact that Annex C lists all of the "in-some-country" clauses
on differing practices of a less permanent nature relating to the subject of this document.
A list of all parts in the IEC 62271 series, published under the general title High-voltage
switchgear and controlgear, can be found on the IEC website.
– 8 – IEC 62271-200:2021 IEC 2021
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under 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.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.
INTRODUCTION
High-voltage (IEC 60050-601:1985, 601-01-27) switchgear refers to rated voltages above 1 kV.
However, medium-voltage is commonly used for distribution systems with rated voltages above
1 kV and generally applied up to and including 52 kV; refer to IEC 60050-601:1985, 601-01-28
[1] .
Although primarily dedicated to three-phase systems, this document can also be applied to
single-phase and two-phase systems.
Switchgear and controlgear assemblies having a solid-insulation enclosure are covered by
IEC 62271-201.
____________
Numbers in square brackets refer to the Bibliography.
– 10 – IEC 62271-200:2021 IEC 2021
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 Scope
This part of IEC 62271 is applicable to prefabricated metal-enclosed switchgear and controlgear
assemblies designed for:
– alternating current;
– rated voltages above 1 kV and up to and including 52 kV;
– service frequencies up to and including 60 Hz;
– indoor and outdoor installation.
The assembly can include air-insulated and/or fluid-filled compartments.
For components installed in a metal-enclosed switchgear and controlgear, this document
supplements or even replaces in some cases, the requirements as stated by the individual
product standards.
The list of components which can be inside the metal-enclosed switchgear and controlgear is
not limited to the ones explicitly cited in this document.
2 Normative references
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.
IEC 60050-151, International Electrotechnical Vocabulary (IEV) – Part 151: Electrical and
magnetic devices (available at http://www.electropedia.org)
IEC 60050-441, International Electrotechnical Vocabulary (IEV) – Part 441: Switchgear,
controlgear and fuses (available at http://www.electropedia.org)
IEC 60060-1:2010, High-voltage test techniques – Part 1: General definitions and test
requirements
IEC 60270:2000, High-voltage test techniques – Partial discharge measurements
IEC 60270:2000/AMD1:2015
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
IEC 60529:1989/AMD1:1999
IEC 60529:1989/AMD2:2013
IEC 62262:2002, Degrees of protection provided by enclosures for electrical equipment against
external mechanical impacts (IK code)
IEC 62271-1:2017, High-voltage switchgear and controlgear – Part 1: Common specifications
for alternating current switchgear and controlgear
IEC 62271-100:2021, High-voltage switchgear and controlgear – Part 100: Alternating-current
circuit-breakers
IEC 62271-102:2018, High-voltage switchgear and controlgear – Part 102: Alternating current
disconnectors and earthing switches
IEC 62271-103:2021, High-voltage switchgear and controlgear – Part 103: Switches for rated
voltages above 1 kV up to and including 52 kV
IEC 62271-105:2021, High-voltage switchgear and controlgear – Part 105: Alternating current
switch-fuse combinations for rated voltages above 1 kV up to and including 52 kV
IEC 62271-106:2021, High-voltage switchgear and controlgear – Part 106: Alternating current
contactors, contactor-based controllers and motor-starters
IEC 62271-107:2019, High-voltage switchgear and controlgear – Part 107: Alternating current
fused circuit-switchers for rated voltages above 1 kV up to and including 52 kV
IEC 62271-201:2014, High-voltage switchgear and controlgear – Part 201: AC solid-insulation
enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including
52 kV
IEC 62271-203:2011, High-voltage switchgear and controlgear – Part 203: Gas-insulated
metal-enclosed switchgear for rated voltages above 52 kV
IEC 62271-213:2021, High-voltage switchgear and controlgear – Part 213: Voltage detecting
and indicating system
IEC 62271-215:2021, High-voltage switchgear and controlgear – Part 215: Phase comparator
used with VDIS
IEC IEEE 62271-37-013:2015, High-voltage switchgear and controlgear – Part 37-013:
Alternating-current generator circuit-breakers
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 62271-1, IEC 60050-151
and IEC 60050-441, and the following apply.
NOTE The classification system for definitions of IEC 62271-1:2017 is followed. Terms and definitions are
referenced and prioritized in the following order:
– Clause 3 of this document;
– IEC 62271-1:2017;
– IEC 60050-441;
– IEC 60050-151.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1 General terms and definitions
The definitions in 3.1 of IEC 62271-1:2017 are applicable, with the following additions and/or
modifications:
– 12 – IEC 62271-200:2021 IEC 2021
3.1.101
ambient air temperature
temperature, determined under specified conditions, of the air surrounding
the enclosure of an assembly
[SOURCE: IEC 60050-441:1984, 441-11-13, modified – "prescribed" has been replaced by
"specified", "complete switching device or fuse" by "enclosure of an assembly" and the note has
been removed.]
3.1.102
disruptive discharge
phenomenon associated with the failure of insulation under electric stress, in which the
discharge completely bridges the insulation under test, reducing the voltage between the
electrodes to zero or nearly to zero
Note 1 to entry: The term is applicable to discharges in solid, liquid and gaseous dielectrics and to combinations of
these.
Note 2 to entry: A disruptive discharge in a solid dielectric produces permanent loss of dielectric strength (non-
self-restoring insulation); in a liquid or gaseous dielectric, the loss can be only temporary (self-restoring insulation).
Note 3 to entry: The term "sparkover" is used when a disruptive discharge occurs in a gaseous or liquid dielectric.
The term "flashover" is used when a disruptive discharge occurs over the surface of a solid dielectric in gaseous or
liquid medium. The term "puncture" is used when a disruptive discharge occurs through a solid dielectric.
3.1.103
relative pressure
pressure that refers to the local atmospheric pressure
Note 1 to entry: When defining a filling level it is in reference to the standard atmospheric pressure of 101,3 kPa,
as defined in IEC 62271-1.
3.1.104
segregation
arrangement of conductors with earthed metal interposed between them in
such a manner that disruptive discharges can only occur to earth
Note 1 to entry: A segregation can be established between the conductors as well as between the open contacts of
a switching device like a disconnector.
Note 2 to entry: This definition does not specify any mechanical protection (IP and IK).
[SOURCE: IEC 60050-441:1984, 441-11-11, modified – Notes to entry have been added.]
3.1.105
in service
condition where at least one high voltage part in the assembly is
energized
3.1.106
normal operating condition
in service condition with all doors and covers properly closed and secured
3.1.107
normal use
use of the assembly as defined by the manufacturer's instructions reference,
corresponding to the conditions and operations in service
Note 1 to entry: "normal use" may include maintenance activities within an accessible high-voltage compartment.
3.2 Assemblies of switchgear and controlgear
The definitions in 3.2 of IEC 62271-1:2017 are applicable, with the following additions and/or
modifications:
3.2.101
metal-enclosed switchgear and controlgear
assembly
switchgear and controlgear assemblies with a metal enclosure intended to be earthed, and
complete except for external connections
Note 1 to entry: This term generally is applicable to high-voltage switchgear and controlgear.
Note 2 to entry: The term "external connections" corresponds to "external conductors (cables or bars) connecting
the assembly to the network or an external installation".
[SOURCE: IEC 60050-441:1984, 441-12-04, modified – The second preferred term "assembly"
and Note 2 to entry have been added and in the definition "external" has been deleted.]
3.2.102
multi-tier design
design of an assembly in which the main switching devices of two or more functional units are
arranged vertically (one above the other) within a common enclosure
3.3 Parts of assemblies
The definitions in 3.3 of IEC 62271-1:2017 are applicable.
3.4 Switching devices
The definitions in 3.4 of IEC 62271-1:2017 are applicable.
3.5 Parts of switchgear and controlgear
The definitions in 3.5 of IEC 62271-1:2017 are applicable, with the following additions and/or
modifications:
3.5.101
enclosure
part of an assembly 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
[SOURCE: IEC 60050-441:1984, 441-13-01]
3.5.102
metal enclosure
outermost enclosure made of metal, which can be composed of several
elements, enclosing all high-voltage parts
3.5.103
functional unit
part of an assembly comprising the main circuits, earthing circuit and auxiliary
circuits that contribute to the fulfilment of a single function
Note 1 to entry: Functional units can be distinguished according to the function for which they are intended, e.g.,
incoming unit, through which electrical energy is normally fed into the assembly, outgoing unit, through which
electrical energy is normally supplied to one or more external circuits
– 14 – IEC 62271-200:2021 IEC 2021
[SOURCE: IEC 60050-441:1
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