The Automatic DC Motor Starter is designed to allow the automatic starting of the DC Motor/Generator, Model 8501, by sensing the motor counter electromagnetic force (CEMF) to control the armature current. In the event of loss of field, the control circuit protects the motor against overspeed by removing power from the armature. Thermal/magnetic circuit breakers completely protect the starter. Connections are made through 4 mm color-coded jacks.