railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Power Electronics and Drives Thyristors Switching Characteristics of Thyristors
An SCR is considered to be a semi-controlled device because
1
It can be turned off but not on with a gate pulse.
2
It conducts only during one - half cycle of an alternating current wave.
3
It can be turned on but not off with a gate pulse.
4
It can be turned on only during one half cycle of an alternating voltages wave.