. Electric railway journal . rable the 37 ohms resistance provided on the first step,the maximum current that could fiow from the linewould be less than 200 amp. with no voltage generatedin the motors. The resulting torque is negligible, par-ticularly if this current is divided among two or threecircuits, as would be the case in the second or thirdcombinations. The stabilizing resistance protects the motors againstsudden changes in line voltage, while the axle generatorsprotect against variations in grade, which would other-wise tend to vary the speed. In case of a suddenreduction
. Electric railway journal . rable the 37 ohms resistance provided on the first step,the maximum current that could fiow from the linewould be less than 200 amp. with no voltage generatedin the motors. The resulting torque is negligible, par-ticularly if this current is divided among two or threecircuits, as would be the case in the second or thirdcombinations. The stabilizing resistance protects the motors againstsudden changes in line voltage, while the axle generatorsprotect against variations in grade, which would other-wise tend to vary the speed. In case of a suddenreduction in line voltage, which would be followed bya heavy increase in the regenerated current, theincreased voltage drop in the stabilizing resistanceresulting from this immediately cuts down the fieldcurrent and the voltage generated by the main motorsufficiently to limit the increase in regenerated cur-rent to a safe value. Similarly the axle-generatorregulation takes care of the passage of a train from asharp curve to a SIMPLIFIED plan AND LONGITUDINAL VERTICAL SECTION OF WESTINGHOUSE LOCOMOTIVE 512 Electric Railway Journal Vol. 55, No. 11
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