. Electric railway journal . follows: Rating at 600 volts 25 hp Armature speed (37 amp., 600 volts) 1236 Weight of motor with gears and case 885 lb. Clearance beneath gear case (24-in. wheels) 2% in. Clearance beneath motor frame (24-in. wheels) ... .3 5/16 in. The high armature speed, 1236 at thehourly rating (37 amp.), increases the ventilationof the motor and gives it a high continuous ratingof 35 amp. at 450 to 600 volts. The high speed hasalso necessitated the use of a finer pitched gearingthan had hitherto been standard, but from the rec-ords now available it is expected th
. Electric railway journal . follows: Rating at 600 volts 25 hp Armature speed (37 amp., 600 volts) 1236 Weight of motor with gears and case 885 lb. Clearance beneath gear case (24-in. wheels) 2% in. Clearance beneath motor frame (24-in. wheels) ... .3 5/16 in. The high armature speed, 1236 at thehourly rating (37 amp.), increases the ventilationof the motor and gives it a high continuous ratingof 35 amp. at 450 to 600 volts. The high speed hasalso necessitated the use of a finer pitched gearingthan had hitherto been standard, but from the rec-ords now available it is expected that the life of thenew 41/4-pitch gearing will be equal to that of the3-pitch and 3 V2-pitch gearing used on larger mo-tors. The adoption of ball bearings on the arma-ture is another feature which, as previously noted,was brought about largely as a result of the higherarmature speed. Two of these motors under a Birney car with theaverage passenger loads handle somewhat under4 tons per motor and make unusually fast Frame of GE-258 Motor Showing Screened VentilatingOpenings Armature of GE-258 Motor Showing the DoubleVentilating Fan on the Pinion End motor was so short that if the gear hub had beenplaced against the wheel, a very large part of themotor weight would have come on one wheel. It was The average acceleration rate is Un-der normal city schedules the motors have capacityenough to handle considerably more weight. September 22, 1917J ELECTRIC RAILWAY JOURNAL [535
Size: 1964px × 1272px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
