. The Street railway journal . allel concrete walls May 9, 1908.] STREET RAILWAY JOURNAL. 779 3 ft. 6 in. thick. The base frames of the machines arecast with square corners and with vertical sides, to providefor setting the top of the frame flush with the floor, asshown in the cross-section. The rotaries are provided withelectrical oscillators, and are started from the alternating-current side by means of 1/3 and 2/3 voltage taps on thetransformers. The two double-throw, triple-pole startingswitches for each machine are installed on panels betweenthe transformers and rotaries. In the northwest
. The Street railway journal . allel concrete walls May 9, 1908.] STREET RAILWAY JOURNAL. 779 3 ft. 6 in. thick. The base frames of the machines arecast with square corners and with vertical sides, to providefor setting the top of the frame flush with the floor, asshown in the cross-section. The rotaries are provided withelectrical oscillators, and are started from the alternating-current side by means of 1/3 and 2/3 voltage taps on thetransformers. The two double-throw, triple-pole startingswitches for each machine are installed on panels betweenthe transformers and rotaries. In the northwest corner ofthe building is a 300-kw booster for raising voltage foran outlying line, for which the regular voltage of 575 voltsis insufficient. WIRING All wires and cables are run in conduit, vitrified tile be-ing used in the basement for alternating-current and direct-current feeders, and loricated conduits in the floor fillingand walls for control and lighting wires.^ The lead-sheathed high-tension cables entering: the build-. FIG. 21,^EXTERI0R OF NORTHERN SUBSTATION NOS. 1 AND 2 ing terminate in end bells, from which the leads are broughtout to the terminals of the disconnecting switches, whichare separated by concrete barriers. The middle switch isset higher than the two outside ones, so as to make theleads from the end bells the same length and thereby permitinterchanging the connections without splicing. converters, while the new one is intended for four 1500-kwmachines, two of which are now in place, as shown in theview of the interior. (Fig. 19.) The new apparatus is controlled from an addition to theswitchboard in the old building. The arrangement of theapparatus in the new portion and the construction detailscorrespond to those of the central substation, already de-scribed, and are shown in Fig. 20. In the old portionthe high-tension bus and switch structures are locatedon a concrete gallery near the southerly wall and imme-diately over the transformers. SUBSTATION LIG
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
