Under over voltage condition impedance offered by the voltage clamg device is__________?
A. low
B. High
C. moderate
D. infinity
Power Electronics
The latching current of GTO should be of order
The latching current of GTO should be of order
A. 100 mA
B. 500 mA
C. 1 A
D. 2 A
The maximum di/dt in a SCR is____________?
The maximum di/dt in a SCR is____________?
A. Directly proportional to supply voltage
B. Directly proportional to inductance in the circuit
C. Inversely proportional to supply voltage
D. Both A and B
Example of a voltage clamping device______________?
Example of a voltage clamg device______________?
A. fast acting fuse
B. snubber circuit
C. metal oxide varistor
D. aluminium block
Switching frequency of SITH is____________?
Switching frequency of SITH is____________?
A. 5 KHz
B. 10 KHz
C. 60 KHz
D. 100 KHz
Practical way of obtaining static voltage equalization in series connected SCRs is by the use of____________?
Practical way of obtaining static voltage equalization in series connected SCRs is by the use of____________?
A. One resistor across the string
B. Resistors of the same value across each SCR
C. Resistors of different values across each SCR
D. One resistor in series with each SCR
Thyristor can be protected from over voltages by using____________?
Thyristor can be protected from over voltages by using____________?
A. voltage clamg device.
B. fuse.
C. heat sink.
D. snubber circuit.
Thyristor can be protected from over voltages by using
Thyristor can be protected from over voltages by using
A. 23 mA.
B. 40 mA.
C. 10 mA.
D. 60 mA.
A single phase full bridge inverter can operate in load commutation mode in case load consists of____________?
A single phase full bridge inverter can operate in load commutation mode in case load consists of____________?
A. RL.
B. RLC underdamped.
C. RLC overdamped.
D. RLC critically damped.
The function of snubber circuit connected across the SCR is to___________?
The function of snubber circuit connected across the SCR is to___________?
A. Suppress dV / dt.
B. Increase dV / dt.
C. Decrease dV / dt.
D. Decrease di / dt.