EN 62271-203:2012

FOREWORD
1 General
2 Normal and special service conditions
3 Terms and definitions
4 Ratings
5 Design and construction
6 Type tests
7 Routine tests
8 Guide to the selection of switchgear and
   controlgear
9 Information to be given with enquiries,
   tenders and orders
10 Transport, storage, installation, operation
   and maintenance
11 Safety
12 Influence of the product on the environment
Annex A (normative) - Test procedure for dielectric
        test on three-phase encapsulated GIS, range II
Annex B (normative) - Methods for testing gas-insulated
        metal-enclosed switchgear under conditions of
        arcing due to an internal fault
Annex C (informative) - Technical and practical
        considerations of site testing
Annex D (informative) - Calculation of pressure rise
        due to an internal fault
Annex E (informative) - Information to be given with
        enquiries, tenders and orders
Annex F (informative) - Service continuity
Annex G (informative) - Insulation levels for GIS with
        rated voltages higher than 800 kV
Annex H (informative) - List of notes concerning
        certain countries
Bibliography
Annex ZA (normative) - Normative references to
         international publications with their
         corresponding European publications
Annex ZB (informative) - A-deviations

IEC 62271-203:2011 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. 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. This publication is to be read in conjunction with IEC 62271-1:2007.