Problem 3 (10 points) A transmission system has a bus fault at one of its 138 kV buses. The positive, negative, and zero impedance of the bus are given as, Z1 = j0.10 pu, Z2 = j 0.15 pu, and 20 =j 0.2 pu respectively. a) (2 points) Calculate the magnitude of a 3-phase fault current in amperes. b) (3 points) Calculate the magnitude of a single line to ground fault current in ampere

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