Q.

In HVDC converter station equipment using thyristors it is necessary to use a large number of thyristors in series because 

  • ACurrent ratings of thyristors are low.
  • BVoltage ratings of thyristors are low.
  • CThyristors always fail to an internal open circuit.
  • DNone of the above.
Correct Answer : (B)

Voltage ratings of thyristors are low.

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