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A synchronous machine connected to a power system grid busbar is operating as a generator. To make the machine operate as a motor, the | |
A. | direction of rotation is tobe reversed. [Wrong Answer] |
B. | phase-sequence is to be changed. [Wrong Answer] |
C. | field excitation is to be decreased. [Wrong Answer] |
D. | mechanical input is to be less than the losses at the shaft. [Correct Answer] |