2) The portion of a power system shown by the one-line diagram of Fig. 1, with generating sources back of all three ends, has conventional primary and back-up relaying. Several faults have occurred in the system as shown on the figure. Assume only one failure at a time, then answer the following: a) Determine the tripped circuit breaker(s) for each fault. b) Determine the backup circuit breaker(s) for each disconnected line. c) Draw a sketch showing the overlapping of primary protective zones? Fault Tripped Circuit Breaker(s) Backup CB for the Line 1 2 3 4 5 6 Fig. 1 3 6 -8