Exam Questions Papers - Engineering

Q1:

In a series operated thyristor configuration, each thyristor should support 100 V. However, the three thyristors only support voltage of 100 V, 90 V and 85 V respectively. Hence, the string efficiency in the case is :

A 98.45%

B 45.84%

C 91.67%

D none of these

ANS:C - 91.67%

String efficiency = = = 0.9167 = 91.67%.