InterviewSolution
Saved Bookmarks
| 1. |
Calculate the circuit turn-off time for 3-Φ Fully controlled rectifier if the firing angle is 110° and supply frequency is 50 Hz.(a) 3.8 msec(b) 5.2 msec(c) 9.3 msec(d) 8.7 msecI got this question in a national level competition.I'd like to ask this question from Solid State Controlled Drives in portion Introduction to Solid State Controlled Drives of Electric Drives |
|
Answer» CORRECT choice is (a) 3.8 msec Best explanation: The CIRCUIT turn-off TIME for 3-Φ Fully CONTROLLED rectifier is (180°-α)÷ω;. The value of circuit turn-off time for ∝ ≥ 60° is (180°-110°)÷6.28×50=3.8 msec. |
|