BS EN 62271-204:2011

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 GIL
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 (informative) - Estimation of continuous current
Annex B (informative) - Earthing
Annex C (normative) - Long-term testing of buried installations
Bibliography
Annex ZA (normative) - Normative references to international
         publications with their corresponding European
         publications

Applicable to rigid HV gas-insulated transmission lines (GIL) in which the insulation is obtained, at least partly, by a non-corrosive insulating gas, other than air at atmospheric pressure, for alternating current of rated voltages above 52 kV, and for service frequencies up to and including 60 Hz.

IEC 62271-204:2011 applies to rigid HV gas insulated transmission lines (GIL) in which the insulation is obtained, at least partly, by a non-corrosive insulating gas, other than air at atmospheric pressure, for alternating current of rated voltages above 52 kV, and for service frequencies up to and including 60 Hz. This standard cancels and replaces IEC/TS 61640:1998. It is a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- update to be in line with IEC 62271-1:2007 and 62271-203 and alignment of the voltage ratings and the test voltages;
- addition of new information for gas tightness and corrosion protection.

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