Henry Borden Hydroelectric Power Plant
External Power Plant
The oldest
of the power plants encompasses eight penstock, and a conventional power house.
The first unit was inaugurated during 1926, and the other were installed until
1950, totaling eight generation groups, with an installed capacity of 469
MW.
Each generator is powered by two Pelton type turbines, activated by the waters
driven from the Rio das Pedras Reservoir, which reach the Valves' Housing
where, after passing through two butterfly valves by means of penstock, go
down the hillside reaching their respective turbines, completing an approximate
distance of 1,500 meters.
Underground Power Plant
The Power
Plant encompasses six generation groups, installed inside the rocky massive
of the Serra do Mar, in a cave 120 m long, 21 m wide and 39 m high, which
420MW of installed capacity.
The first generation group started operating in 1956. Each generator is powered
by one Pelton turbine, activated by four water jets.