69-kv medium-pressure gas-filled cable

LOAD GROWTH in 1947 in the Washington, D. C., area necessitated starting construction of a generating station in Alexandria, Va., approximately four miles south of the territory served by the Potomac Electric Power Company. The ultimate capacity of this station is five 80,000-kw 85-per cent power factor machines to be placed on the line at approximately 1-year intervals. Intervening air fields and park territory rendered overhead transmission impractical and the problem became one of underground cable. For economical reasons, it was decided to install cable capacity for each generator as it became available.