Exam 41: Timed Semiautomatic Synchronizing

-In the accompanying figure, the timer setting should be adjusted for the maximum time required to accelerate the motor to the point that it can reach the synchronous speed after contact TR closes.

If the attempt to synchronize the motor is not successful, the stop button is pressed and the starting cycle is__________ .

A synchronous motor may be brought up to synchronous speed with the use of a definite _______relay to excite the DC field.

-In the accompanying figure, the timing relay coil (TR) is energized with the secondary starter coil (F).