Geode-An Electrical Energy Supply with High Availability

Project GEODE describes an electrical energy supply characterized by its very high availability. It is to be used in the PTT (French Telephone Company) telephone exchanges and is targeted for an unavailability of better than 10^-6. In order to achieve this performance Merlin Gerin has adopted - a double bus bar architecture - remote controlled electrical equipment - a motor-generator set specifically designed for this project - computer assisted surveillance We present the overall reliability calculations for this project along with that for energy sources. The E.d.F (French Utility Company) network and the Motor-Generators.