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1. |
Calculate the circuit turn-off time for 3-Φ Fully controlled rectifier if the firing angle is 27° and supply frequency is 50 Hz. |
A. | 11.8 msec |
B. | 14.4 msec |
C. | 16.1 msec |
D. | 16.5 msec |
Answer» B. 14.4 msec | |