Determine the time dial setting of the phase relays given in the 138 kV system of Figure 1. The numbers within rectangles are the bus numbers. All relays within the

loop are directional and have CTR=400/5 and Ipu=5 A. All relays associated with radial lines have CTR=400/5, Ipu=5 A and TD=2. All the relays have the curve t=TD-(5.95/(M²-1)+0.18); and INST=∞ The equivalent impedance of the source is Zsı=j0.2 ohms. Each line has a total impedance ofZL1= 2+j12 ohms. Use a coordination time interval (CI) of 0.4 seconds.