. The Street railway journal . o. 8. the auxiliary steam header and the motor-generator exciternear the switchboard, to save in piping and wiring. Thereare two 4 in. x in. x 4 in. duplex Worthington oil stepbearing pumps located in the basement. These are built for500 lbs. pressure. The turbine valves are operated me-chanically by the governors instead of electrically. Railway current is obtained from two 250-kw motor gen-erator sets located near the switchboard. Each consists ofa 360-hp, three-phase, 2300-volt induction motor driving at514 r. p. m. a 525 to 575-volt GE generator. There arethr
. The Street railway journal . o. 8. the auxiliary steam header and the motor-generator exciternear the switchboard, to save in piping and wiring. Thereare two 4 in. x in. x 4 in. duplex Worthington oil stepbearing pumps located in the basement. These are built for500 lbs. pressure. The turbine valves are operated me-chanically by the governors instead of electrically. Railway current is obtained from two 250-kw motor gen-erator sets located near the switchboard. Each consists ofa 360-hp, three-phase, 2300-volt induction motor driving at514 r. p. m. a 525 to 575-volt GE generator. There arethree ampere tub transformers, 71 kw each, installedin the turbine room for arc lighting service on the switchboard is built of twenty panels. Eight of theseare blanks for future service, three are 2300-volt feederpanels, two for the turbines, two for exciters, one for the360-hp motors of tlie railway sets, two for the railwaygenerators and two for 550-volt feeders. Two sets of PAPER ON SINGLE-PHASE RAILWAY SYSTEM. VIEW, SHOWING LIBERAL SPACE BACK OF THE SWITCHBOARD three-phase busbars arc provided and any alternator orcircuit can be thrown upon either bus. The output of theturbines is separately metered, as is also the railway 2300-volt circuits are controlled by oil switchesmounted on a frame at the rear of the switchboard. Theseswitches are mechanically operated by bell cranks mountedon the fronts of the main switchboard panels, but are pro-vided with overload trip coils. All cables are concealed iniron pipes and are rubber covered and tested for 20,000volts. They are carried in diagonal runs from the ma-chines to the switchboard and thence to the wire average 24-hour load on the plant is at present about300 kw. The engineers for the work were Blomberg &Proutt, of Memphis, Tenn. The construction was in thehands of the Leonard-Martin Construction Company, ofChicago. F. G. Proutt was general manager of the Jacksoncompany during the period in w
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
