. Electric railway journal . consists of a three-phasetransformer which steps down the 10,000-volt pressure to500 volts and feeds an asynchronous motor driving an al-ternating-current generator with an output of 400 kva at15 cycles to 16 cycles. The latter supplies single-phase cur-rent at a terminal pressure of 10,000 volts. The converterstation receives the necessary energy from the Rjukanpower station, about miles distant. The Tinnos Railwayis fed from the Svaelgfos converter station, which is placedin the railway power station. The equipment consists ofthree converter sets similar to t
. Electric railway journal . consists of a three-phasetransformer which steps down the 10,000-volt pressure to500 volts and feeds an asynchronous motor driving an al-ternating-current generator with an output of 400 kva at15 cycles to 16 cycles. The latter supplies single-phase cur-rent at a terminal pressure of 10,000 volts. The converterstation receives the necessary energy from the Rjukanpower station, about miles distant. The Tinnos Railwayis fed from the Svaelgfos converter station, which is placedin the railway power station. The equipment consists ofthree converter sets similar to those described hereinbe-fore. All line supplies and apparatus were furnished by theAllgemeine Elektricitats-Gesellschaft. THE ROLLER TROLLEY The adoption of the roller trolley and pantograph onseveral recent heavy-traction, high-tension, direct-currentlines makes a short account of the construction of thisroller of interest. It was developed and used on a largescale first on the Key Route cars in Oakland and Berke-ley, Latest Roller Trolley—Key Route, California On these lines trains of six or more heavy cars run athigh speeds with an ordinary trolley voltage, and this madenecessary a current collector which would have greatercapacity than the ordinary trolley. Since the first rollertrolley was adopted on that line several improvements havebeen made, and the accompanying engraving shows thelatest type of Key Route trolley. The roller is mounted on a pantograph frame and weighs,complete with spindle, 28 lb. The wearing surface is atube of non-arcing brass, supported on a wooden roller. Theheight of the trolley wire above the head of the rail variesfrom 14 ft. 6 in. to 22 ft., yet, owing to the pantographconstruction, the pressure of the roller against the wire iskept practically constant at about 34 lb. The averagemileage of the rollers is 55,000. The cost of manufactureon a large scale is $ each. The Elevated & Underground Railway Company, Berlin,Germany, is plannin
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
