. The Street railway journal . FIG. 1.—THE 13,200-VOLT GENERATOR AND VERTICAL ENGINE of the cross-compound condensing, vertical type, with cylinders40 ins. x 78 ins. x 60 ins. The unusually low speed, 63 r. p. m.,is the result of a demand for such by the railway company, thisbeing occasioned by the satisfaction obtained from previouslyinstalled direct-current units speeded to 60 r. p. m. Barometriccondensers are employed, the pumps for these being located on February ii, 1905.] STREET RAILWAY JOURNAL. 267 the main engine room floor. The condenser water is obtainedfrom Bear Grass Creek, near by
. The Street railway journal . FIG. 1.—THE 13,200-VOLT GENERATOR AND VERTICAL ENGINE of the cross-compound condensing, vertical type, with cylinders40 ins. x 78 ins. x 60 ins. The unusually low speed, 63 r. p. m.,is the result of a demand for such by the railway company, thisbeing occasioned by the satisfaction obtained from previouslyinstalled direct-current units speeded to 60 r. p. m. Barometriccondensers are employed, the pumps for these being located on February ii, 1905.] STREET RAILWAY JOURNAL. 267 the main engine room floor. The condenser water is obtainedfrom Bear Grass Creek, near by the station. The generators deliver three-phase current at 25 cycles and13,200 volts. Two exciter dynamos, one direct connected to asteam engine, the other driven by an induction motor, supplycurrent to the revolving fields. The switchboard gallery isshown in Fig. 4. The switchboard itself consists of nine panels,. FIG. 2.—SWITCHBOARDS AND GALLERY two generator panels, three for the exciters and four con-trolling the transmission lines to the three sub-stations, sub-station No. 3 being supplied by two sets of transmission the switchboard are the overload relays and electricallycontrolled switches for the high-tension circuits; cut-outswitches are placed on either side of the controlling switches. Of the three sub-stations, the one termed No. 3, located atTwenty-Eighth and Walnut Streets, in the western portion ofthe city, is nearest the station, it being 4 miles distant. Sub-station No. 2 is 8 miles southwest, while the remaining one is
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
