. The Street railway journal . d also suppliesalternating current at 380 volts to a G. E. 250-kw three-phase 4-pole 750-r. p. 25-cycle rotary converter,the voltage ratio being The overload capacity for twohours is 50 per cent. The normal output is 417 amps, onthe direct-current side, the no-load voltage being 550 converter is fitted with a pulley for operating it in-verted as a direct-current generator. It is self-excited whendriven from the alternating-current side. The field rheo-stat is designed to secure a range of power factor from 85 396 STREET RAILWAY JOURNAL.
. The Street railway journal . d also suppliesalternating current at 380 volts to a G. E. 250-kw three-phase 4-pole 750-r. p. 25-cycle rotary converter,the voltage ratio being The overload capacity for twohours is 50 per cent. The normal output is 417 amps, onthe direct-current side, the no-load voltage being 550 converter is fitted with a pulley for operating it in-verted as a direct-current generator. It is self-excited whendriven from the alternating-current side. The field rheo-stat is designed to secure a range of power factor from 85 396 STREET RAILWAY JOURNAL. [Vol. XIX. No. 14. per cent to 100 per cent with either lagging or leading cur-rents. The pulley and shaft are sufficiently rigid to permitthe rotary to deliver 200 kw working as a motor. A belt-driven exciter, type I. B., 2—if—1200, 500 volts, is fur-nished also. A oil-cooled reactive coil is suppliedfor use in compounding. The efficiencies are as followsfor 50 per cent, 75 per cent, 100 per cent and 150 per cent. INTERIOR OF BRYANTVILLE SUB-STATION load: 91 per cent, per cent, per cent and cent. The total weight of the machine is about 21,000lbs. Additional direct current is supplied by a G. E. 300-kw, 8-pole, 550-volt, 545-amp., 105-r. p. m. railway gen-erator, direct-driven by a 450-hp. Green-Wheelock horizontal cross-compound con-densing engine, cylinders 16 ins. x 36 ins. x42 ins., weight 120,000 lbs., equipped withMonarch stop. The high and low pressureclearances are per cent and -\7per cent,and the inlet ports 18 sq. ins. and 90 sq. ins.,the exhaust ports being 20 sq. ins. and 1 16sq. ins. respectively. The high and lowpressure piston rods are 3I ins. and 4 diameter, the large and small sections ofconnecting rods being sq. ins. and [ ins. The length between rod centers is105 ins., the cross-head pins 5 ins. in lengthand diameter and the crank pins 5A ins. ineach dimension. The shaft is Bethlehemsteel 14 ins. in jour
Size: 1780px × 1404px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
