| 318 / | HD | ELECTRICITY: MOTIVE POWER SYSTEMS |
| 727 | DF | INDUCTION MOTOR SYSTEMS {12} |
| 767 | DF | .~ Primary circuit control {9} |
| 778 | ![]() | .~.~ Starting control {3} |
| 779 | DF | .~.~.~> With speed control |
| 780 | DF | .~.~.~> Three phase motor with variable transformer to initially adjust voltage to motor windings |
| 781 | DF | .~.~.~> Operating from a single phase source {6} |