. The Street railway journal . rvice to which it is adapted. In city service a double equipment of these motors is suit-able for operating single or double-truck cars of almost anysize ordinarily used—that is, cars not exceeding 35 ft. to 40 , and weighing, without equipment or load, from 23,000lbs. to 30,000 lbs. In this service, with runs from l/% mile to%. mile in length, a two-motor equipment with a gear ratio of16 to 71 will produce a schedule speed of 10 to 13 ,assuming a pressure of 500 volts and a straight level track. Insuburban service a four-motor equipment w
. The Street railway journal . rvice to which it is adapted. In city service a double equipment of these motors is suit-able for operating single or double-truck cars of almost anysize ordinarily used—that is, cars not exceeding 35 ft. to 40 , and weighing, without equipment or load, from 23,000lbs. to 30,000 lbs. In this service, with runs from l/% mile to%. mile in length, a two-motor equipment with a gear ratio of16 to 71 will produce a schedule speed of 10 to 13 ,assuming a pressure of 500 volts and a straight level track. Insuburban service a four-motor equipment will operate carsfrom 40 ft. to 45 ft. over-all, and weighing from 30,000 lbs. to35,000 lbs. without equipment or load. In this work, theaverage load being from mile to j4 mile, the four-motorequipment will maintain an average speed of with gear ratios of 19 to 68 under the conditionspreviously stated. In interurban service, with an average runof from mile to 1^ miles in length, and with equipment and. NO. 93 RAILWAY MOTOR. FIELD CLOSED weight of car as above, schedule speeds of to may be attained. The general performance of this motor is shown by thecurves herewith. The motor has a nominal capacity of 50 hpat 500 volts for one hour. The curve sheets show the speed,tractive effort and the brake horse-power which it will developwith currents of from o amp. to 200 amps, at 500 volts, also atime-temperature curve. The motor has a continuous capacity of 50 amps, at 300 volts, or 46 amps, at 400 volts. Under the usual conditions of rail-way service, it will carry safely any loads within the rangeshown on the curve sheets, provided that the integrated heat-ing effect does not exceed the heating effect caused by the con-tinuous application of the above currents at the correspondingvoltage. In a shop test at either of these loads, the rise in temperature H 500 VOLTSGEAR .RATIO 19 : 6833 WHEELSCONTINUOUS CAPACITY 50 A. AT 300 V. 46 A. AT
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
