A. Duty ratio only
B. Frequency only
C. Duty ratio and frequency
D. Duty ratio, frequency and time delay
In a square – wave operation of 3 phase CSIs, the power values are on for___________? A. 60 degree B. 90 degreeC. 120 degree D. 150 degree
Which triggering is the most reliable____________? A. Forward voltage triggeringB. Gate triggering C. dV / dt triggering D. Thermal triggering
Snubber circuit is used with SCR_________________? A. in seriesB. in parallel C. either series or parallel D. anti parallel
For power output higher than 15 kW, the suitable rectifier is________________? A. Single phase B. 3 phase C. Poly phaseD. Only (b) and (c)
A thyristor equivalent of a thyratron tube is a _________? A. Diac B. TriacC. Silicon controlled-rectifier SCR D. None of above
BCT is used for____________? A. High power phase control B. High power current control C. Low power current control D. Low power phase control