. The Street railway journal . The con-verters receiving this energy from their respective groups oftransformers in turn deliver it (less a loss approximating 4 percent at full load) in the form of direct current at a potential of625 volts to the bus-bars of the direct-current switchboards,from which it is conveyed by insulated cables to the contactrails. A general view of the interior of one of the sub-stationsis given on page 627. The illustration on page 630 is from a photograph taken onone of the switchboard galleries. In the sub-stations, as inthe power house, the high-potential alternati
. The Street railway journal . The con-verters receiving this energy from their respective groups oftransformers in turn deliver it (less a loss approximating 4 percent at full load) in the form of direct current at a potential of625 volts to the bus-bars of the direct-current switchboards,from which it is conveyed by insulated cables to the contactrails. A general view of the interior of one of the sub-stationsis given on page 627. The illustration on page 630 is from a photograph taken onone of the switchboard galleries. In the sub-stations, as inthe power house, the high-potential alternating-current circuitsare opened and closed by oil switches, which are electricallyoperated by motors, these in turn being controlled by no-voltdirect-current circuits. Diagrammatic bench boards are used, asat the power house, but in the substations they are, of course,relatively small and free from complication. The instrument board is supported by iron columns and iscarried at a sufficient height above the bench board to enable. CONVERTER FLOOR PLAN AND PLAN OF SWITCHBOARD GALLERY-SUB-STATION NO. 14 adjacent side wall. The switchboard is located at the rear ofthe station. The central shaft affords excellent light and ven-tilation for the operating room. The steel work of the sub-stations is designed with a view to the addition of two storage-battery floors, should it be decided at some future time that theaddition of such an auxiliary is advisable. The necessary equipment of the sub-stations implies sitesapproximately 50 ft. x 100 ft. in dimensions, and sub-stationsNos. 14, 15, 17 and 18 are practically all this size. Sub-sta-tions Nos. 11 and 16 are 100 ft. in length, but the lots acquiredin these instances being of unusual width, these sub-stationsare approximately 60 ft. wide. Sub-station No. 12, on accountof wide limited ground space, is but 48 ft. and 92 ft. long. Ineach of the sub-stations, except No. 13, foundations are pro-vided for eight converters; sub-station No. 13 c
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
