Transmission Lines

A load of 10 MVA, 0.8 p.f. lagging, 22 KV is served by a transmission line which has a line resistance of 3 ohms and a line reactance of 10 ohms. Solve for the sending end voltage.

Find the capacitive susceptance per mile of a single-phase line operating at 60 HZ. The conductor is Partridge with an outside diameter of 0.642 in, and spacing is 20 ff between centers.

The PTs of a 220 KV transmission line have a ratio of 132.76 KV/ 66.375 v and are connected wye-wye. A voltmeter connected line to ground reads 66 volts, what is the transmission line voltage?

Two No. 8 copper conductors are placed 15 cm apart with a GMR of \(1.27 \times 10^{-3}\) m. if the lenth of the line is 4 km, find the value of the line inductance.

The conductors of a 30 km long transmission line have a triangular configuration. The conductors are placed 4 ft apart. Each conductor has 336.4 MCM ACSR and its diameter is 0.75 inch. Find the capacitive reactance per phase?

A 3 phase, 60 Hz transposed transmission line is arranged horizontally with distances \(D_{12} = 5\) ft, \(D_{23} = 5\) ft and \(D_{13} = 10\) ft. The outside diameter of the conductors is 0.721 inch and the GMR is 0.0243 ft. Determine the capacitance per phase of the line in microfarad per kilometer.

The capacitance per kilometer of a 3-phase belted cable is 0.3μF between the two cores with the third core connected to the lead sheath. Calculate the charging current taken by the five kilometers of this cable when connected to a 3-phase 50 Hz, 11kV supply.

A string insulator has 5 units. The voltage across the bottom most unit is 25% of the total voltage. What is the string efficiency?

Find the capacitive susceptance per mile to neutral of a single-phase line operating at 60 Hz. The conductor is Partridge with an outside diameter of 0.642 inch, and spacing is 20 ft between centers.

A 34.5 kV feeder line is 5 miles long. The conductors are spaced 4-feet horizontally. The conductor is 4/0 copper with GMR of 0.01688 ft. What is the reactance?

The capacitive reactance of a transmission line is 90,000 ohms per kilometer. Find the total capacitive reactance if the transmission line is 60 km long.

Estimate the distance over which a load of 150 MW at a power factor of 0.8 lagging can be delivered by a three phase transmission line having conductors each of resistance 0.1 ohm per kilometer. The voltage at the receiving end is to be 132 kV and the loss in the transmission is to be 5% of the power delivered.

A conductor has four identical strands arranged in diamond configuration. Find the GMR of the conductor in terms of the radius r of each strand.

A three phase, 60Hz, transmission line has its conductors arranged in a triangular configuration so that the two distances between conductors are 5m and the third is 8m. the conductors have an outside diameter of 250 mils. Find the inductive reactance in ohm per km per phase of the transmission line.

The capacitance between any two conductors of a three-phase, three- conductor cable is 2 μF. The cable operates at 11 kV line voltage and 50 Hz. What is the charging current through the cable capacitance?

The conductors of a three-phase transmission line are arranged in the form of an equilateral triangle with sides of 6 m each. If the conductors are 500 mils in diameter and the line is 25 km long, what is its inductance per phase?

A 10-km long, single-phase short transmission line has \(0.5\angle 60^\circ\) Ω/km impedance. The line supplies a 316.8 kW load at 0.8 power factor lagging. What is the voltage regulation if the receiving end voltage is 3.3 kV?

The surge impedance of a transmission line is given by

Determine the total inductance of a single-phase overhead transmission line 10 km long. The diameter of each conductor is 0.8 cm and the distance between them is 1.2 meters.

A 100 km transmission line has a 1,000 ohms shunt reactance. What is the per km shunt reactance?