. Electric railway journal . otormans Cab closed. The secondary winding of the main transformer ismade in two parts, which are so connected with the motorsthat a transformer winding and motor always follow oneanother. Both motors, therefore, conduct the same cur-rent, and divide equally between themselves the total volt-age of both transformer windings. The first winding hastaps for 116, 175, 244 and 314 volts, and the second wind-ing for 151, 210, 280 and 361 volts. It will be seen from volts is induced in the first winding, whereas volts istaken by the first motor, leaving a negative b
. Electric railway journal . otormans Cab closed. The secondary winding of the main transformer ismade in two parts, which are so connected with the motorsthat a transformer winding and motor always follow oneanother. Both motors, therefore, conduct the same cur-rent, and divide equally between themselves the total volt-age of both transformer windings. The first winding hastaps for 116, 175, 244 and 314 volts, and the second wind-ing for 151, 210, 280 and 361 volts. It will be seen from volts is induced in the first winding, whereas volts istaken by the first motor, leaving a negative balance of ; the second winding gives 151 volts, of which the sec-ond motor takes volts, leaving a positive balance volts. As these differences cancel each other, the dif-ference of potential is again zero, as at the starting ofthe motor. In connection with the foregoing there is used an equal-izing transformer which is wound for a 1 :i ratio. Thetwo primary terminals of this transformer are connected to. Scheveningen Single-Phase Railway—Head-on View ofMotor Car the starting points, and the two secondary ends to the endpoints of the motors. The purpose of this transformer istwo-fold: First, to permit cutting out a motor if injured;second, to prevent the interruption of the entire circuitwhen the several contactors are cut out in moving from stepto step. If a contactor is opened, the .motor which it serveswill receive current from the other winding by way of theequalizing transformer. Naturally this produces a certain
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