. Die Straßenbahn Zeitschrift. ts maximale Effizienz unter einer stetigen Dauerlast entspricht seiner vollen Kapazität, während die Effizienz der Batterie ist greatestunter schnell schwankenden Lasten oder kurzzeitigen Entladungen, wenn schwer, oder unter leichten Lasten, wenn verlängert. Es wird sich zeigen, dass um die variable Leistung für den elektrischen Eisenbahnverkehr erforderlich zu produzieren, mit höchster Wirtschaftlichkeit, die Kombination von Maschinen und Batterie, richtig proportioniert, bildet die ideale Anordnung, jede nimmt den Teil der Last, die es am besten angepasst ist, um zu handhaben. Das Verhältnis zwischen den Kapazitäten von Maschinen und Batt

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. The Street railway journal . ts maximum efficiency under a steady sustained load equalto its full capacity, while the efficiency of the battery is greatestunder rapidly fluctuating loads or short period discharges if heavy, or under light loads if prolonged. It will be seen that in order toproduce the variable output required for electric railway service, with highest economy, the combination of machinery and battery, properly proportioned, forms the ideal arrangement, each takingthat portion of load which it is best adapted to handle. The proportion between the capacities of machinery and batterywill evidently depend upon the characteristics of the load curve.As the size of the battery for continuous peak work increases withthe length of time it is called upon to discharge, as well as withthe rate of such discharge, it is desirable, in order to avoid exces- state of Weather_5?f??. Temperature ■ Special Day Date TAkyAMh. BUFFALO RAILWAY COMPANY. AJHPEKE CHART. Readings from 7 A.M. ifihs- to 1 A-M. —FJmJlA^ joo?_. Maximum Amp...Minimum Amp.- -Maximum Yolts_ Maximum H.E i>ML. Minimum H.P Average H.P. Converters-Time ~2ihrs. Signed. I Volts J?$l v h.p Ma. / hj/s. Tienning__SUPT power t Minimum Volts __ Street Ry.Journal (The dotted line shows the actual load on station; the solid line, the outputof the generators.) SAMPLE DAILY SHEET OF OUTPUT, BUFFALO sive first cost, to plan to utilize the battery up to its one-hour rate.On this basis, the cost of the battery will be approximately the sameas the equivalent capacity of machinery, including boilers, engines, generators, etc., installed. This one-hour basis does not mean that the battery is limited toa peak of one hours duration; a battery may be utilized for a peakof load lasting three or four hours, and yet be discharged at timesduring that interval considerably beyond its one-hour rate, with-out exhausting its capacity. Load curves of such a nature as topermit this are the rule, and not the exception, in railway

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• bookcentury1800
• bookdecade1880
• bookidstreetrailwa
• bookyear1884