Design a distance relay protection of the power system shown in Fig. 1 using a permissive underreaching transfer trip pilot scheme for lines A and B. Label the Line A relay at Substation 1 "21-A1", the Line A relay at Substation 2 "21-A2", the Line B relay at Substation 2 "21-B2", and the Line B relay at Substation 3 "21-B3". Show where each relay gets its potential and current inputs using the instrument transformers shown on Fig. 1. Also, show which breaker(s) is/are tripped by each relay. Be sure to describe the settings (in ohms) for zones 1, 2, and 3 of each relay. Describe how each of the four relays will respond to faults at locations W, X, Y, and Z. Further, explain what the relay response will be if the pilot communication fails. Line 2 BE Line 1 * Substation 1 Line 3 38 Line A Z-25-112 Line 4 X3E W Q Line 5 Substation 2 Line 6 BE North Bus South Bus Fig. 1 Line B 2-40-120 Line 8 Substation 3 Repeat solving Problem 2 using a permissive overreaching transfer trip pilot scheme. BE North Bus South Bus 38 Line 9 Design bus differential protection for each bus section requiring protection on the power system shown on Fig. 1. Use the proper IEEE device number to identify the differential relay and show all necessary instrument transformer connections.