Answer / venu

p=root3*v*i
500K=root3*11K*I
hence we get
I=62.096
so this is the maximum current flowing to the particular
load so we can use 75/1A ratio CT

Answer / bala.a

first u shouls convert to A
500 / (root 3 x 11 )= 26.2A
So u can select 50/1A CT FOR THE ABOVE LOAD

Answer / pkv

50/5 or 50/5 depending upon the protection relay amp

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