File:The Street railway journal (1900) (14758553265).jpg

Identifier: streetrailwayjo161900newy (find matches)
Title: The Street railway journal
Year: 1884 (1880s)
Authors:
Subjects: Street-railroads Electric railroads Transportation
Publisher: New York : McGraw Pub. Co.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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the station for 4 miles, and a 0000 continuing to the grade, September 15, 1900.) STREET RAILWAY JOURNAL. 867 4 miles more. The cars are shown as dots, with arrows indicatingtheir direction. The line voltage for the instant under considera-tion is indicated above the copper. The load with six cars oper-ating is found to average about 180 amps., and to have fluctua-tions reaching to 350 amps., occasionally a little higher. The linevoltage has been calculated for two instants, the instant of averageload, as shown in Figs. 2, 5 and 7, and the instant of maximumload, shown in Figs. 1, 3, 4 and 6. The road originally was 10miles long and operated five cars, and there were, of course, fourturnouts, not counting those at the ends. The lowest voltageencountered on the line at the time of heavy pulls was 220 at thegrade. It was just possible to operate. But when it becomes de-sirable to add the extra 2 miles shown in the diagrams to the road Fig- 3- Battery InstalledJ Cost $4500 JLoad 350 amp.
Text Appearing After Image:
Street Ry.Journal and operate six cars, the lowest voltage on the line at the momentof maximum pull will become, as you see on Fig. i, 13 volts at theend of the line and 76 volts at the grade. Evidently this situationneeds help. Now let us apply a battery to this road without in any wayaltering the copper. In the first place, where shall it be put?The heavy grade is a source of much of the trouble, it is there thatthe heaviest pulls come. In addition, at the foot of the grade is acar house. If the battery is put there it will be an easy matterto give it what little attendance it needs. The next step is to de-termine what voltage the battery must be capable of. The batteryis to be operated as a regulator, alternately charging and dis-charging; its voltage then must be the same as the average volt-age maintained at the battery location by the copper. If the volt-coo ^Station Voltat400 f075 HsT Additic : Fig. 4-nal Copper 1Cost $18500Load 350 amp lstalled 200 24S 5001 CM. 2/o >—^30

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