B) 3 - phase system, consist of three lines issuspended by a string of 3 similar insulators. When the voltageacross the line unit is 30 kV, calculate • The line to neutralvoltage, when the shunt capacitance between each insulator andearth is 0.111 of the capacitance of the insulator itself. Thestring efficiency for the three insulators When you have 4insulators How can you derive (V).
