Your task is to study the operation of the six distance relay elements protecting a 138 kV transmission line with the self-polarizing scheme shown in class. The line impedances are

2 =0.07+0.7j ohms/mile and žLO =0.25+2.5j ohms/mile. The line's length is 10 miles.Instrument transformer ratios: CTR=3000/5, VTR = 1200 The relay elements have the first zone MHO characteristics with the following settings: Diameter | Z. |= 85% of Zu, and angle theta,= 75 degrees. a. A fault was simulated with the results shown in Problem 1. Those are the phase voltages and currents measured by the relay elements. Determine the apparent impedance in secondary ohms of the six relay elements of a self-polarized scheme and tell which elements will operate in first zone. (Use algebraic method only.) [ 4 points] b. Comment on the type of fault and the elements that operate. (1 points) c. Estimate the distance from the relay to the fault. [1 point]