IEC 62271-203:2022

IEC 62271-203 ®
Edition 3.0 2022-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
High-voltage switchgear and controlgear –
Part 203: AC gas-insulated metal-enclosed switchgear for rated voltages above
52 kV
Appareillage à haute tension –
Partie 203: Appareillage sous enveloppe métallique à isolation gazeuse et à
courant alternatif de tensions assignées supérieures à 52 kV

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IEC 62271-203 ®
Edition 3.0 2022-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
High-voltage switchgear and controlgear –
Part 203: AC gas-insulated metal-enclosed switchgear for rated voltages above
52 kV
Appareillage à haute tension –
Partie 203: Appareillage sous enveloppe métallique à isolation gazeuse et à
courant alternatif de tensions assignées supérieures à 52 kV
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.130.10 ISBN 978-2-8322-3799-1
– 2 – IEC 62271-203:2022  IEC 2022
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Normal and special service conditions . 10
5 Ratings . 11
6 Design and construction . 14
7 Type tests . 27
8 Routine tests . 41
9 Guide to the selection of switchgear and controlgear (informative) . 44
10 Information to be given with enquiries, tenders and orders (informative) . 44
11 Transport, storage, installation, operating instructions and maintenance. 44
12 Safety . 50
13 Influence of the product on the environment . 51
Annex A (normative) Test procedure for dielectric test on three-phase encapsulated
GIS, range II (above 245 kV) . 52
Annex B (normative) Methods for testing gas-insulated metal-enclosed switchgear
under conditions of arcing due to an internal fault . 53
Annex C (informative) Technical and practical considerations of site testing . 56
Annex D (informative) Calculation of pressure rise due to an internal fault . 61
Annex E (informative) Information to be given with enquiries, tenders and orders . 62
Annex F (informative) Service continuity . 68
Annex G (informative) List of notes concerning certain countries . 76
Bibliography . 77

Figure 1 – Pressure coordination . 19
Figure 2 – Example of arrangement of enclosures and gas compartments . 24
Figure F.1 – MRE1X (e.g. repair of disconnector to busbar) . 71
Figure F.2 – MRE00 (e.g. during visual inspection) . 71
Figure F.3 – MRE01 (e.g. repair of circuit-breaker) . 72
Figure F.4 – MRE11 (e.g. repair of disconnector) . 72
Figure F.5 – MRE11 (e.g. extension of switchgear with a feeder bay) . 73
Figure F.6 – MRE13 (e.g. repair of disconnector) . 73
Figure F.7 – MRE2X (e.g. on-site dielectric test of busbar section A) . 74
Figure F.8 – MRE2X (e.g. on-site dielectric test of busbar section 1) . 74
Figure F.9 – MRE00 (e.g. repair of circuit-breaker) . 75

Table 1 – Reference table of service conditions relevant to GIS . 11
Table 2 – Rated insulation levels for rated voltages for equipment of range I (245 kV
and below) . 12
Table 3 – Rated insulation levels for rated voltages for equipment of range II (above
245 kV) . 13

Table 4 – Performance criteria . 20
Table 5 – Type tests . 28
Table 6 – Test voltage for measuring PD intensity . 31
Table 7 – On-site test voltages . 48
Table A.1 – Switching impulse test conditions above 245 kV . 52
Table E.1 – Normal and special service conditions . 62
Table E.2 – Ratings . 63
Table E.3 – Design and construction . 64
Table E.4 – Bus ducts . 65
Table E.5 – Bushing. 65
Table E.6 – Cable connection . 66
Table E.7 – Transformer connection . 66
Table E.8 – Current transformer . 66
Table E.9 – Inductive voltage transformer . 66
Table E.10 – Documentation for enquiries and tenders . 67

– 4 – IEC 62271-203:2022  IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

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

FOREWORD
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