Question 3: For the power system as shown, the line impedance is 4+j 3 ohms (primary) and zone 1 is set to cover 85% of the transmission line. a) At what loading (P+jQ) will the zone 1 relay see it as a fault? Assume that the line loading is at 0.8 pf lagging. b) What is the apparent impedance seen by the relay (secondary ohms)? A Rated voltage = 34.64 kV (line-to-line) Rated MVA = 24 MVA B 21 24 P+jQ CT ratio = 500:5A VT ratio = 20,000:69.3V