Data gathering and transmission system for project EHV

The general electric company extra-high-voltage project (called “Project EHV” for short) was announced in June 1958,1 after more than a year of preliminary planning. Project EHV involves the design, construction, and operation of a complete a-c transmission system, which will carry power first at 460-500 kv and then at 650-690 kv (750-kv maximum). This is more than twice the maximum voltage presently used by utilities in the United States and Canada and 50% higher than the highest transmission voltage in the world -500 kv in the Soviet Union. Detailed planning, cost estimating, and writing of the specifications for the line and apparatus were essentially completed on May 27, 1959, when construction was begun at the site and in various plants of the co-operating companies. Construction is proceeding and energization at 460-500 kv began in December 1960.