Refer to the single line diagram as shown below is a 3 phase distribution system

a. Suggest a proper protective device of A.  Justify your suggestion.

b. Calculate the prospective short circuit fault level at F1.

c. Suggest a protective device of B and its electrical characteristics for procurement.

d. Evaluate the fault level at F2if it is 3phase short circuit fault

e. What is the earth fault level at F3?

f. Suggest  a  protective  device  of  C  and  its  electrical characteristics  for procurement