Engine : Electricity - 1228/1386
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| How is the direction of rotation of the main propulsion motor in a modern AC propulsion drive system reversed? |
| A) changing the direction of current flow in the motor's field winding |
| B) power directional relays |
| C) reversing the direction of current flow in the armature |
| D) electronically changing the phase sequence of the voltages generated by the power converter |
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