SCRs with a rating of 1000 V & 200 A are available to be used in a string to handle 6 KV & 1 KV. Calculate the number of series & parallel units required in case the de-rating factor is 0.1. (Round off the fraction to the greatest & nearest integer) - Study24x7
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Karan Singh
24 Apr 2019 12:22 PM study24x7 study24x7

 SCRs with a rating of 1000 V & 200 A are available to be used in a string to handle 6 KV & 1 KV. Calculate the number of series & parallel units required in case the de-rating factor is 0.1. (Round off the fraction to the greatest & nearest integer)

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A

Series = 7, Parallel = 6

B

Series = 6, Parallel = 7

C

Series = 6, Parallel = 6

D

Series = 7, Parallel = 7

Railways IIT-JEE Sciences
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  • geet sharma
    • DRF = 1-S.E
    Therefore
    0.1 = (1-6000/1000Ns) = (1-1000/200Np)
    Ns = 6.6 = 7(say)
    Np = 5.5 = 6(say)

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    Reply 24 Apr 2019 12:42 PM
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