Power Systems - Interview Questions and Answers

26. The line conductor of a transmission line has an overall diameter of 19.53 mm, weight 0.844 kg/m and an ultimate breaking strength of 7950 kg. If the factor of safety is to be 2, when conductor has an ice of 1 kg/m and a horizontal wind pressure of 1.5 kg/m. What is the vertical sag, corresponding to this loading for a 300 m span level supports?

27. A three phase 50 Hz line consists of three conductors each of diameter 21 mm, The spacing between the conductors all follows: A - B = 3m, B - C = 5m, C - A = 3.6m If the line operates at 132 k V, the reactive voltampere generatd by the line per km is

28. A two conductor 1 - pi line operates at 50 Hz. The diameter of each conductor is 2 cm and are spaced 3m apart. What is the line to line capacitance

29. For a 500 Hz frequency excitation, a 50 km, long power line will be modelled as

30. The charging current per kill of the line is