. Journal of electricity, power, and gas . le phase transformer, reducing from 11,000volts to the trolley pressure. Lightning protective ap-paratus, choke coils, and high tension circuit breakersare included in the 11,000 volt apparatus, while the3300 volt trolley feeders are controlled by oil circuitbreakers. The motor cars and locomotives are supplied withpower through pantagraph trolleys, and carry auto-transformers arranged with taps for reducing the trol-ley pressure to voltages suitable for supplying themotors, car lighting, and air compressors. The motorcars have oil insulated, self-coo
. Journal of electricity, power, and gas . le phase transformer, reducing from 11,000volts to the trolley pressure. Lightning protective ap-paratus, choke coils, and high tension circuit breakersare included in the 11,000 volt apparatus, while the3300 volt trolley feeders are controlled by oil circuitbreakers. The motor cars and locomotives are supplied withpower through pantagraph trolleys, and carry auto-transformers arranged with taps for reducing the trol-ley pressure to voltages suitable for supplying themotors, car lighting, and air compressors. The motorcars have oil insulated, self-cooled auto-transformers,while that on the locomotive is air cooled from themotor driven blower equipment furnished for theforced ventilation of the motors. The 45-ton electric locomotive is of the doubleswivel truck class, provided with car type of cab, andhas the following- general over-all dimensions: lengthover bumpers, 29 feet; extreme width, 9 feet 6 inches;height, rail to top of cab, 11 feet 7 inches; rigid wheelbase, 7 feet 4 Interior of Exeter Frequency-Changing Sub-Station. The 15 cycle 3300 volt, single phase trolley con-struction is of the single catenary bracket type, com-prising a 7/16 inch steel messenger suspended frompoles 120 feet apart, and supporting No. 000 trolleywire. The redwood poles, 36 feet long, are set six feetin concrete. The rolling stock comprises a 47-ton Baldwin-Westinghouse electric locomotive, equipped with four125 h. p. Westinghouse series compensated, singlephase motors driving 36-inch wheels through a gearreduction of 17 to 66; four 40-ton passenger cars, eachequipped with four 75 h. p. motors; two 28-ton trailercars of construction similar to the above motor cars. Cars and locomotives are all supplied with unitswitch control, and automatic air brake trailer cars as well as the motor cars are fittedwith brake valves and master controllers so that three-car trains can be operated from a trailer car at thehead of the trai
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Keywords: ., bookcentury1800, bookdecade1890, bookidjo, booksubjectelectricity
