1.

Calculate the string efficiency if the de-rating factor is .48.(a) 48 %(b) 52 %(c) 50 %(d) 60 %This question was posed to me in an online interview.Question is taken from Solid-State Devices in chapter Introduction to Solid-State Devices of Electric Drives

Answer»

Correct option is (B) 52 %

The explanation is: The string EFFICIENCY is CALCULATED for series and parallel connection of SCRs. The value of string efficiency is 1 – (De-rating factor) = 1-.48 = 52 %.



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