File:Electrical world (1904) (14598136809).jpg

Identifier: electricalworld43newy (find matches)
Title: Electrical world
Year: 1883 (1880s)
Authors:
Subjects: Electrical engineering
Publisher: (New York McGraw-Hill Pub. Co., etc.)
Contributing Library: Engineering - University of Toronto
Digitizing Sponsor: University of Toronto

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ting, 296 enclosedarc lamps in commercial use, 427 direct-current, open-arc lamps forstreet lighting that are rated at 2,000 cp each, 40 open arcs for stores,and 125-kw capacity in direct-current motors. Dynamos for theoperation of these several loads have been previously driven by steampower through a long main shaft at the Troy lighting station. Inthe application of the transmitted water power to these loads thesteam engines were disconnected from the main shaft, and syn-chronous motors were installed to drive it and the several types ofdynamos. These dynamos include direct-current arc machines of9.6 amp., 2,300-volt alternators, and 500-volt, direct-current gen-erators for the motor load. The underground cables bringing the10,800-volt, three-phase current from the Watervliet sub-stationenter the old lighting station at Troy, and this current, after passingthrough oil switches, goes to the 10,800-volt synchronous motorswithout transformation. In this way the old generating equipment
Text Appearing After Image:
Fig. 4.—Another View of Interior of Dock Street sub-Station, Schenect.\dv. ductors run from the Watervliet sub-station to the cable landing onthe west bank of the Hudson, and there enter a small brick terminalhouse where they join the cables and have lightning arresters at-tached. After crossing the river the cables enter a large manhole closeto its east bank and are there connected to underground cables thatrun to the lighting station, a few hundred feet away. Two cableswere used to cross the river, which was covered with a thick coatingof ice at the time they were laid, in December, 1903. By means ofhorses the two heavy cables were dragged across the river on the iceso that they lay side by side over the location on its bed, where theywere to rest, which had been previously determined, and then the icewas sawed through on each side of the cables so that they sank intoposition by their own weight. Each of these two cables contains three No. 3/0 stranded copperconductors, is insulat

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