1.

Calculate the De-rating factor if the string efficiency is 90 %.(a) .4(b) .1(c) .7(d) .8I have been asked this question during an interview.This key question is from Solid-State Devices in section Introduction to Solid-State Devices of Electric Drives

Answer»

The correct OPTION is (a) .4

The BEST I can EXPLAIN: De-rating factor is USED to measure the reliability of a string. The value of the De-rating factor is 1-(string efficiency)=1-.9=.1.



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