Question

2. CTR 500:1 3LG fault PTR 1000:1 Relay (60 A sec, 15 V sec) A 2-mile long radial line serving load only at the end of the line. The line is homogeneous with uniform impedance 1 Ω per mile. Relay at the CB in substation has CTR 500:1 and PTR 1000:1. For a solid balanced 3-line-to ground fault (with zero fault impedance) occurred somewhere on the line, the relay sees 60 A secondary and 15 V secondary at each of its phase. Where is the fault location (distance from substation)?

Answer 1