. Electric railway review . electro-pneumatic con-trol. Each truck has mounted on it two No. 132 100-horse-power alternating-current ;md direct-current motors. The gen-eral scheme of wiring ol the ears is shown in the aceomi>ing diagram. The electrical mechanism installed under the car body isone 200-kilowatt air-cooled auto-transformer, two sets of unit switches, one for the alternating-current and one for thedirect-current control, the grid resistance, one combined alter-nating-current circuit-breaker and limit switch with pneumaticreset, which is operated from the platform, one reciproca
. Electric railway review . electro-pneumatic con-trol. Each truck has mounted on it two No. 132 100-horse-power alternating-current ;md direct-current motors. The gen-eral scheme of wiring ol the ears is shown in the aceomi>ing diagram. The electrical mechanism installed under the car body isone 200-kilowatt air-cooled auto-transformer, two sets of unit switches, one for the alternating-current and one for thedirect-current control, the grid resistance, one combined alter-nating-current circuit-breaker and limit switch with pneumaticreset, which is operated from the platform, one reciprocating-type reverser switch, one commutating switch, for changingover from direct current to alternating current, one emergencychange switch by which current can be taken for the alternat-ing-current operation by trolley wheel to operate the car incase the pantagraph becomes disabled. When in the normalposition the switch is set to use current in the direct-currentoperation. There is one relay-light switch, which changes the. Pittsburg & Butler Street Railway—Track and RoadbedConstruction. lights from direct current to alternating current when thecar passes from one to the other. The auto-transformer iskept cool by a small motor-driven fan placed in one end ofthe transformer casing. The air is taken from openings inthe cable duct and driven through the transformer coils andout at the other end. This motor is constantly in circuit. The wiring for the pneumatic control is all in loricatedconduit with junction boxes for distribution to the variouspoints of connection. The main cables are also carried in acable duct provided in the center of the car floor by the carbuilders. All cables to and from the reverser to the motorsare carried in cable ducts. There are two trolley leads fromthe emergency switch, one alternating-current and onedirect-current. The alternating-current lead passes from thepantagraph in the center of the car in loricated pipe and isconnected to an oil circuit-br
Size: 3085px × 810px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectstreetr, bookyear1906
