(a) Conductors of a 3-phase line are arranged at the corners of a triangle of sides 15, 15, and 18 meters. The diameter of each line conductor is 1 cm. Calculate the Inductance per phase per km (L1) for this arrangement. Calculate Inductance per phase per km(L2) if the spacing between the conductors are reduced to quarter.
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- Find the inductive reactance per mile of a single-phase overhead transmission line operating at 60 Hz given the conductors to be Partridge and the spacing between centers to be 30 ft.PROBLEM SOLVING NO. 2: A string of suspension consists of four (4) units. The Voltage between each pin and earth is 0.08 of the Self-Capacitance of the unit. The Voltage between the Line Conductor and earth is 110 KV. Find the Voltage distribution across each unit. Draw the diagram.Three Conductors of a 3-phase line are arranged at the corners of a triangle of sides A=2 m, B=3 m, and C=4 m. The diameter of each line conductor is 1.35 cm. a) Calculate the Capacitance per phase per km (C1) in nanofarad for this arrangement. b) Calculate capacitance per phase per km(C2) in nanofarad if the conductor if the spacing is doubled. c) Calculate the Ratio of C2 with respect to C1.
- Three conductors of a 3-phase overhead line are arranged in a horizontal plane in the order a-b-c, distance between a and b is 6 m, b and c is spaced 6 m apart. The diameter of each line conductor is 2.5 cm. Calculate the Capacitance per phase per km (L1) for this arrangement. Calculate Capacitance per phase per km(L2) if the spacing between the conductors are reduced by half. Calculate the Ratio of C2 with respect to C1. Capacitance in nF per Phase per Km for Arrangement 1 (C1) Capacitance in nF per phase per km for Arrangement 2 (C2) Ratio of C2 to C1i) Calculate V1 and V2 for the voltage across the string insulator having phase voltage of 33kV for transmission line using details tabulated in the Table 3(a). Table 3(a) Type of Insulator Shunt Capacitance between each unit 0.1 C String to junction Self -Capacitance of each insulator ii) With the help of a suitable schematic diagram and necessary theoretical explanation, illustrate how to improve the efficiency of the suspension insulator.Three conductors of a 3-phase overhead line are arranged in a horizontal plane in the order a-b-c, distance between a and b is 6 m, b and c is spaced 6 m apart. The diameter of each line conductor is 1.5 cm. Calculate the Inductance per phase per km (L1) for this arrangement. Calculate Inductance per phase per km(L2) if the spacing between the conductors are reduced by half. Calculate the Ratio of L2 with respect to L1.
- Three conductors of a 3-phase overhead line are arranged in a horizontal plane in the order a-b-c, distance between a and b is 12 m, b and c is spaced 12 m apart. The diameter of each line conductor is 2.5 cm. Calculate the Capacitance per phase per km (C1) for this arrangement. Calculate Capacitance per phase per km(C2) if the spacing between the conductors are reduced by 1/4th of the given spacing.In an overhead line, there are three units in the string of insulators having line voltage of 33kV. If the shunt capacitance between each insulator pin and earth is 0.11 times than self-capacitance of each insulator, (i) Calculate the distribution of voltage over 3 insulators. (ii) Explain to how to make uniform voltagesThree conductors of a 3-phase overhead line are arranged in a horizontal plane in the order a-b-c, distance between a and b is 12 m, b and c is spaced 12 m apart. The diameter of each line conductor is 2 cm. Calculate the Capacitance per phase per km (C1) for this arrangement. Calculate Capacitance per phase per km(C2) if the spacing between the conductors are reduced by 1/4th of the given spacing. Capacitance in per Phase per Km for Arrangement 1 (C1) Capacitance in per phase per km for Arrangement 2 (C2)
- Q1. Transmission and distribution lines are important components of any power system study. (A) In relation to high voltage overhead ac transmission lines, Discuss the choice of materials for the conductors in terms of their electrical/mechanical properties and the costs involved. Discuss the factors that determine the distance (D) between phase conductors and explain the impact of the distance D on the inductance and capacitance values of the line at different voltage levels. Support your arguments with relevant equations where appropriate. Discuss the impact of the radius of the conductors on phase capacitance and inductance values and why bundles are used at very high voltages.A string of suspension consists of four (4) units. The Voltage between each pin and earth is 0.12 of the Self-Capacitance of the unit. The Voltage between the Line Conductor and earth is 135KV. Find the Voltage distribution across each unit and the String Efficiency1- A single phase line has two parallel conductors 3m apart. The radius of each conductor is 1.2 cm. calculate the loop inductance per km of the line. 2- A single phase line has two parallel conductors 4m apart. The radius of each conductor is 2m. Calculate the capacitance per km of the line.