. Development and electrical distribution of water power . ads to the two exciter units. As the available water supply was 30 cu. meters (1056 cubic feet) f ^kt- : ** < t\ ■ ■ hSv^^X^ il • 1 4* * jifr* 111 H iL&lf i j * £^$ ;; flBig4^t* L l 4 r-?;:. ^^^^^^^^^^^^^T3**S*^E35^^^^Bww^B^KJBftB[ - - ....■..■■■.■■.. ..- ■■,Jmm* Fig. 93.—Power-house. per second with a net fall of metres ( feet), a development of4,400 was possible. This energy had to be transmitted over adistance of 35 kilometres (21 miles) and distributed to two harborcities spread along the shores of the fjord. The p
. Development and electrical distribution of water power . ads to the two exciter units. As the available water supply was 30 cu. meters (1056 cubic feet) f ^kt- : ** < t\ ■ ■ hSv^^X^ il • 1 4* * jifr* 111 H iL&lf i j * £^$ ;; flBig4^t* L l 4 r-?;:. ^^^^^^^^^^^^^T3**S*^E35^^^^Bww^B^KJBftB[ - - ....■..■■■.■■.. ..- ■■,Jmm* Fig. 93.—Power-house. per second with a net fall of metres ( feet), a development of4,400 was possible. This energy had to be transmitted over adistance of 35 kilometres (21 miles) and distributed to two harborcities spread along the shores of the fjord. The plant was designedto generate three-phase alternating current at a potential of 5,000volts, which is stepped up to 20,000 volts and then transmitted to the DRAMMEN PLANT 185 city entrance of Drammen, where this secondary current at 18,000volts is transformed down to 4,500 volts. From here the currentis distributed to a number of smaller transformer substations,where this 4,500 volts is again stepped down to 220 volts, at which. Fig. 94.—Plan of Power-house. potential the consumers are supplied. The feeder systems areinstalled partly overhead and partly underground. From the fore-going it will be seen that the installation includes a generating sta-tion, a step-up transformer system, a long-distance high-tensiontransmission line, a step-down transformer station, a high-tensiondistributing system, step-down transformer substations and low-tension distributing systems. The hydraulic plant is designedfor four main units and three exciter units, having at one endspace for the switchboard and step-up transformers. The totallength of the plant is 42 metres ( feet) an<^ tne width 16metres ( feet) with an extension on one side containingoffices, storerooms, pump-room, and a repair shop. The entirebuilding up to the generating-room floor is of concrete, whilethe upper part is of brick. The roof trusses are of steel coveredwith wooden planking and cor
Size: 2166px × 1154px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkwiley, books
