Power Electronics A diac is turned on by ___________. A breakover voltage Gate voltage Gate current None of these A breakover voltage Gate voltage Gate current None of these ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Dynamic equalising circuit is useful for voltage equalisation. to limit di / dt of SCR. both B and C. to limit dV / dt of SCR. for voltage equalisation. to limit di / dt of SCR. both B and C. to limit dV / dt of SCR. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A thyristor string is made of a no. of SCR connected in series and parallel. The string have volume and current of 11 KV and 4 KA. The voltage and current rating of available SCRs are 1800 V and 1000 A. For a string efficiency of 90 % let the number of SCRs in series and parallel are a and b respectively. Then the value of a and b will be 6, 4. 4, 6. 7, 5. 5, 7. 6, 4. 4, 6. 7, 5. 5, 7. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics The typical value of SCR for modern alternator is 1.5. 0.5. 1.2. 1.0. 1.5. 0.5. 1.2. 1.0. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics What is used to protect a thyristor from high di / dt conditions? Snubber circuit. Voltage clamping device. Fuse. Inductor. Snubber circuit. Voltage clamping device. Fuse. Inductor. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics The capacitance of reversed bised junction J2 in a thyristor is CJ2 = 20 pF and can be assumed to be independant of the off state voltage. The limiting value of the charging current to turn on the thyristor is 16 mA. What is the critical value of dv/dt? 1000 V/µs. 600 V/µs. 800 V/µs. 1200 V/µs. 1000 V/µs. 600 V/µs. 800 V/µs. 1200 V/µs. ANSWER DOWNLOAD EXAMIANS APP
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