Which of the following statements is/are correct regarding the DC static switches?
(i) The input of a DC switch is AC.
(ii) A single-pole DC switch using GTO requires no forced commutation circuitry.
(iii) The switching speed of DC switch depends on commutation circuitry and turn off time of fast thyristors.
1
Only (i)
2
Both (i) and (ii)
3
Both (i) and (iii)
4
Both (ii) and (iii)