engineering recuitment GATE EE 2023-24 Test Series Power Systems Transmission and Distribution Overhead Insulators
A 3 phase overhead transmission line is being supported by three disc insulators. The potential drop across the top unit (i.e. near the tower) and the middle units are 8 kV and 11 kV respectively.
Which of the following is / are true?1
The ratio of capacitance between pin and earth to the self-capacitance of each unit is 0.375
2
Line voltage is 37.125 kV
3
String efficiency is 68.27%
4
Phase voltage is 21.43 kV