1-12. GENERATING EQUIPMENT AND CONTROL DEVICES (cont)
(5) MAIN GENERATOR. Furnishes dc current to operate the traction motors and also serves as a series-wound starting
motor, operating from low battery voltage, to start the diesel engine.
(6) BATTERY FIELD CONTACTOR (BF). Connects the four-pole field of the exciter in series with two 20-ohm resistors
and the battery. It is closed whenever the throttle is in a running notch and the reverser is in either FORWARD or
1-13. TRACTION MOTORS AND SWITCHING DEVICES
(1) POWER CONTACTORS (P1 and P2). Connect the traction motors, in parallel combination, to the main generator.
The power contactors connect and interrupt the dc current. The power contactors carry both low-voltage current for
the interlock circuits and high-voltage current for the traction motors.