. The street railway review . h. p. each, for excit-ers. Through a steel pipe line G ft. in diameter and 1,500 yardslong there is an effective head of water 114 ft. Three-phasealternating currents at 7,000 volts are generated. From thepower house the transmission line passes across the slopes otWengeu to the station at Scheidegg, i\i miles, where the poten-tial is reduced to 500 volts. The transmission line consists ofthree wires of hard drawn copper, .3 in. in diameter, which aresupported on triple iietticoated insulators. Wooden poles 33ft. in height are used for the line. The fall in voltag
. The street railway review . h. p. each, for excit-ers. Through a steel pipe line G ft. in diameter and 1,500 yardslong there is an effective head of water 114 ft. Three-phasealternating currents at 7,000 volts are generated. From thepower house the transmission line passes across the slopes otWengeu to the station at Scheidegg, i\i miles, where the poten-tial is reduced to 500 volts. The transmission line consists ofthree wires of hard drawn copper, .3 in. in diameter, which aresupported on triple iietticoated insulators. Wooden poles 33ft. in height are used for the line. The fall in voltage on theline at full load will be about 10 per cent. The loss throughthe turbines, generators, lines and motors will be approximately50 per cent. The stations are connected by telephone wires,which are transposed at every 550 yds. to avoid induction fromthe alternating current circuit. Lightning arresters ot theSiemens «& Halske high potential pattein are placed at suitableintervals on the transmission and feeder TRAIN ON FIKST SECTION OF LINE. causes a break in the current and thus causes the electric braketo act. (2) A hand brake, operated by a lever w hich applies bronzeshoes to the driving wheels. (3) A pineer or tongs brake,which grips a rail laid in the center of the track; it may beoperated either by the motorman of by the conductor, whostands on the upper platform. It has bronze brake shoes orsole plates. The induction motors also act as brakes as theyrun as generators when the speed reaches synchronism, and inthis way retard the acceleration of the train. The electric locomotives are each equipped with two p. The transmission line is not in duplicate, for it is intendedto construct another power house on the Black Lutschine witha capacity of 2,000 h. p. The sub-stations are well built stonebuildings, each containing two 200-k. w. transformers, reducingthe voltage of the three-phase alternating current to 500 for thetwo trolley wires. When the line is c
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
