A 170-mile, 230 kV, 60 Hz, three-phase single circuit transmission line uses a triangular arrangement with 20 ft, 20 ft, and 36 ft spacing. If the line conductors have a radius of 0.0217 ft, determine the capacitive susceptance to neutral per mile.
A\(4.81 \times 10^{-6}\) mho per mile
B\(12.74 \times 10^{-8}\) mho per mile
C\(7.92 \times 10^{-6}\) mho per mile
D\(2.47 \times 10^{-6}\) mho per mile
#82📜 EE Pre-Board March 2018📘 PowerhouseMedium
A balanced 6,600-volt, 3-phase, 3-wire, 60 Hz transmission line is designed to transmit power to a 450 kVA inductive load at 0.8 power factor. The line has a resistance of 3.5 ohms and a reactance of 10.5 ohms per wire. Find the voltage regulation of the line.
A7.6%
B5.6%
C9.6%
D11.6%
#83📜 EE Pre-Board March 2018📘 PowerhouseMedium
A balanced Y-connected load of (300 + j100) Ω is supplied by a 3-phase line 40 km long with an impedance of (0.6 + j0.7) Ω per km (line to neutral). Find the voltage at the receiving end when the voltage at the sending end is 66 kV.
A60 kV
B62 kV
C58 kV
D64 kV
#84📜 EE Pre-Board March 2018📘 PowerhouseEasy
A 100 km transmission line has a 1,200 ohms shunt reactance. What is the shunt reactance per km?
A1,200 Ω
B120,000 Ω
C12 Ω
D120 Ω
#85📜 EE Pre-Board August 2018📘 PowerhouseMedium
A single-phase, 10-km transmission line has 16.65 mH total inductance. If the distance between the conductors is 1 m, what is the conductor radius?
A2 cm
B1.5 cm
C1 cm
D0.75 cm
#86📜 EE Pre-Board August 2018📘 PowerhouseHard
A single-phase transmission line having a length of 15 miles is composed of two copper conductors spaced 7 ft apart having a diameter of 0.575 inch. Determine the line to line capacitance in farad if the system frequency is 60 Hz.
A\(4.9 \times 10^{-12}\)
B\(9.8 \times 10^{-12}\)
C\(11.8 \times 10^{-9}\)
D\(118 \times 10^{-9}\)
#87📜 EE Pre-Board August 2018📘 PowerhouseMedium
A power station supplies 60 kW to a load over 2,500 ft of 000, 2-conductor copper feeder, the resistance of which is 0.078 ohm per 1,000 ft. The bus-bar voltage is maintained constant at 600 volts. Determine the maximum power which can be transmitted.
A60 KW
B230.7 KW
C120 KW
D150 KW
#88📜 EE Pre-Board August 2018📘 PowerhouseMedium
A 3-phase transmission line has two aluminum conductors per bundle. The self GMD of each conductor is 8.90 mm, the distance between the conductors of a bundle is 40 cm and the distance between phases is 9 m. What is the inductance of the line per phase?
