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70 V rated 6 SCRs are connected in series. The operation voltage of the string is 130. Calculate the De-rating factor.(a) .70(b) .73(c) .78(d) .74The question was asked during an online interview.Asked question is from Solid-State Switching Circuits topic in section Introduction to Solid-State Switching Circuits of Electric Drives

Answer»

Correct option is (a) .70

To elaborate: The string efficiency can be calculated USING the formula operation voltage÷(Number of SCRs×Rated voltage)=130÷(70×6)=.30. The De-rating FACTOR value is 1-.30=.70.



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