A distance relay is used to protect the transmission system shown below. The line impedance of each section is given below:

A distance relay is used to protect the transmission system shown below. Theline impedance of each section is given below:Line Impedance ( Ohms)1-2 6+j602-3 4+j402-4 5+j50The rated voltage of the line is 500 kV. Assume a 1500:5 CT ratio and 4500:1VT ratio at B12.(a) Determine the settings Z1, Z2 & Z3 for the relay at B12.(b) If the maximum current for line 1-2 is 1400A at 0.9 power factor lagging,verify that B12 does not trip for such current.