. Railway mechanical engineer . lled duringeither the cascade or parallel connections. Overload protection is obtained by a current limit has the advantage of not opening the circuit, but op-erates first to arrest the rise of the liquid level in the rheo-stats and then to lower the level if the accelerating currentgoes beyond a certain fixed maximum value. The liquid rheostats may be operated independently of each other by means of levers located in an auxiliary con-troller. This provides a means of equalizing the load onthe different pairs of motors and of reducing the currentsuppl
. Railway mechanical engineer . lled duringeither the cascade or parallel connections. Overload protection is obtained by a current limit has the advantage of not opening the circuit, but op-erates first to arrest the rise of the liquid level in the rheo-stats and then to lower the level if the accelerating currentgoes beyond a certain fixed maximum value. The liquid rheostats may be operated independently of each other by means of levers located in an auxiliary con-troller. This provides a means of equalizing the load onthe different pairs of motors and of reducing the currentsupply to one pair, without affecting the other pair. Otherlevers are provided in the auxiliary controller for raisingand lowering the trolley, starting and cutting out the phaseconverter, and ojjerating the phase converter voltage andphase balancing switches. Due to the inherent characteristics of the induction motorregeneration requires no control equipment. Manipu-lation of the master controller is exactlv the same for re-. Master Controller with Case Removed generation as it is for running. The manipulation of thistype of locomotive is extremely simple for both runningand braking, requiring no special knowledge other than themanipulation of the air brakes when handling heavy trains. Tliere are two compressor sets on the locomotive, each afour-cylinder, two-stage balanced compressor having a ca-pacity of 150 cu. ft. These are manufactured by the West-inghouse .\ir Brake Company. The armature of the motoris fitted on the overhung shaft of the compressor. The motoris a A\estinghouse four-pole commutator tjpe for alternat-ing current, and at 150 volts on each circuit develops 35hp. continuous rating at 1,200 r. By making use ofa single-phase commutator motor, the compressor set can beoperated independently of the phase converter, the onl}- otherapparatus needed being the transformer. This motor hascharacteristics similar to a series motor and gives a hightorque at starti
Size: 1405px × 1778px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
