. American engineer and railroad journal . t. 4 ins. above the main floor. It Isa large board, consisting of 24 panels and is constructed of2-in. blue Vermont marble of the best quality. Each panelis of the uniform height of 7Vi ft., including a sub base;panels numbered 4 to 12 inclusive, are 24 ins. wide and theremainder are 1G ins. wide. The board is mounted upona strong framework of angle iron construction with a polished oak base. The front elevation drawing of the switchboard indicatesthe arrangement of the panels. The first three panels arefeeder panels, each of 500-kw. capacity, for the
. American engineer and railroad journal . t. 4 ins. above the main floor. It Isa large board, consisting of 24 panels and is constructed of2-in. blue Vermont marble of the best quality. Each panelis of the uniform height of 7Vi ft., including a sub base;panels numbered 4 to 12 inclusive, are 24 ins. wide and theremainder are 1G ins. wide. The board is mounted upona strong framework of angle iron construction with a polished oak base. The front elevation drawing of the switchboard indicatesthe arrangement of the panels. The first three panels arefeeder panels, each of 500-kw. capacity, for the 25-cycle, 600-voit 3-phase current. The fourth panel is a 1,500-kw. totaloutput panel for these feeder panels, containing voltmeters, aLincoln synchronizer and a total recording wattmeter. PanelsNos. 5 and 6 are the generator panels for the 750-kw. 25-cyclephase generators, and panel No. 7 is a blank panel to be heldin reserve for a future 760-kw. generator. Joint in conduits and concrete wrapped mtn asptloft burlap IJ ;IXtM ,g1 111. footing reinforced n-ittr old railsDETAILS M TYPICAL MAMioir CONSTRUCTION OF THE UNDBBOBOl mi CONDI u SYSTEM, \ 01 FLEXIBLE CONSTB1 CTION vi DOOB Bl LK- HEADS TO PERMIT UNEQUAL SETTLING OF HD LEVEL. room there is also a motor-generator set installed for an inter-esting class of work. This motor-generator consists of tworevolving-field engine-type machines, mounted on one shaftand bedplate. This machine is designed to deliver from oneside a 3-phase alternating current at a frequency of 60-cyclesand potential of 2,300 volts, when supplied on the other sidewith a 25-cycle 3-phase alternating current of G00 volts; it willalso similarly deliver a 25-cycle, 3-phase alternating currentat GOO volts when supplied with a GO-cycle 3-phase alternatingcurrent of 2,300 volts in the opposite order. This outfit hasa capacity of 100 kw. at a speed of 300 rev. per machines have stationary armature windings and arecarefully constructed and Insu
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
