. American hydroelectric practice; a compilation of useful data and information on the design, construction and operation of hydroelectric systems, from the penstocks to distribution lines . rate under a low water head of ft. and ahigh water head of 19 ft. The layout provided for 14 units and an ultimate station rating of 43,862 kva.,which was completed in 1915 and 1916. The latter installation consists of four 4415 hp. turbines of singlerunner design connected to 3750 kw. generators, which operate at 100 r. p. m. The electiical equipm<;ntwas furnished by the General Electric Company.
. American hydroelectric practice; a compilation of useful data and information on the design, construction and operation of hydroelectric systems, from the penstocks to distribution lines . rate under a low water head of ft. and ahigh water head of 19 ft. The layout provided for 14 units and an ultimate station rating of 43,862 kva.,which was completed in 1915 and 1916. The latter installation consists of four 4415 hp. turbines of singlerunner design connected to 3750 kw. generators, which operate at 100 r. p. m. The electiical equipm<;ntwas furnished by the General Electric Company. T. E. Murray was consulting engineer, and John Bogartwas in charge of the hydraulic and mechanical work.—Electrical World, November 15, 1913. LOW, MEDIUM AND HIGH HEAD DEVELOPMENTS 51 conductors are led directly to the lightning arresters, while the main hnesto the 66,000 volt transformers are of iron tapped on the outside of thestation wall and connected to the iron buses within. III. A 58,000 Hp. Development Near Chattanooga, TennesseeThe power station shown in Figs. 26 and 27 with its transformer house isbuilt of reinforced concrete. It is 66 ft. wide by 350 ft. long, comprising. Fig. 27.—Arrangement of Single Runner Turbines for New Generators Installed in Hales Bar (Tenn.) Station in 1916 an operating building one story high and 220 ft. long and a switch and trans-former house three stories high and 133 ft. long. The operating buildingconsists of seven bays, each containing two turbine units, each unit 52 HYDROELECTRIC PRACTICE consisting of three turbines mounted on a vertical shaft with a 3,133 , 60 cycle, 6,600 volt generator on its upper end. Under ordinarystages of the river only two of the turbines are used for each unit. Thetwo lower turbine wheels are 72 in. in diameter, and the upper wheel is65 in. in diameter. The turbines run at r. p. m., and each unit iscapable of dehvering 5,250 hp. under a head of 35 ft. OCOO Bus _2. 300
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