. The street railway review . al elevation of one ofthe three double stations. The building is of brick 51 by 85 , with 13 in. walls which on three sides are carried 18 ft. 3 the grade line, the copings being covered with cement; thelongitudinal partition which forms one side of the converter room Apr. 15. 1901.] STREET RAILWAY REVIEW. 211 is 13 in. thick and strengthened with pilasters. The roof is carriedon steel I-beams spaced about 5 ft. apart; on these are 2% by 2j-;jin. Ts 18 in. c. to c. which support book tiles 3 in. thick, and overthese is laid a tar and gravel roof
. The street railway review . al elevation of one ofthe three double stations. The building is of brick 51 by 85 , with 13 in. walls which on three sides are carried 18 ft. 3 the grade line, the copings being covered with cement; thelongitudinal partition which forms one side of the converter room Apr. 15. 1901.] STREET RAILWAY REVIEW. 211 is 13 in. thick and strengthened with pilasters. The roof is carriedon steel I-beams spaced about 5 ft. apart; on these are 2% by 2j-;jin. Ts 18 in. c. to c. which support book tiles 3 in. thick, and overthese is laid a tar and gravel roof. The roof girders are 12-in.,ii/i lb., I-beams except that in the converter room, which isserved by a six-ton trolley, alternate roof girders are i8-in., S5-lb. lUicluation, the rotary load changing very little. It will readily beunderstood what an eiTect the regulation of these batteries at theeight sub-stations must have on the generator plant at the powerhouse. During certain hours of the night, in many cases, the load is. Fin. 12—INTERIOR OF MARION SUB-STATION. I-beams. The floors are of concrete except in the battery roomwhere bricks are laid on edge in asphalt on the concrete is the standard practice for battery rooms where it is neces-sary to protect the concrete from the acid. Fig. 13 shows an ex-terior view of the Elwood sub-station and Fig. 12 an interior viewof the Marion sub-station. In addit4on to the rotary converters and Crocker-Wheelerbooster units already mentioned, each double sub-station has four175-kw. static step-down transformers to reduce the line currentfrom high to low potential, one transformer being held in reserve;four high tension lightning arresters; and a battery of 264 cells withtjpe 9-G, in tanks to hold 17-G plates, the capacity being 168 the one hour rate and 80 amperes at the 8-hour rate. Fig. 14is from a photograph of the battery room of the Muncie sub-station. For the single stations there are four 87}^-kw. static t
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
