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Calculate the De-rating factor if the string efficiency is 16 %.

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in Electric Drives by (99.8k points)
Calculate the De-rating factor if the string efficiency is 16 %.

(a) .84

(b) .44

(c) .5

(d) .6

This question was addressed to me at a job interview.

My question is from Solid-State Switching Circuits in chapter Introduction to Solid-State Switching Circuits of Electric Drives

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The correct option is (a) .84

The explanation: De-rating factor is used to measure the reliability of a string. The value of the De-rating factor is 1-(string efficiency)=1-.16=.84.

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