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- 51) Find the approximate inductive reactance of a three-phase bundled conductor line with 2 conductors per phase with spacing of 40 cm. Phase to phase separation is 7 m in horizontal configuration. All conductors are ACSR with diameter of 3.5 cm. Assume f = 50 Hz. A. 0.3 2/km* B. 0.4 0/km C. 0.5 02/km D. 0.6 0/kmFor the Figure 7 shown: A 395 -km long, 34 Hz, three-phase, 3-wire, transmission line is composed of stranded conductors in each line with GMR of 16.66 -mm. If the distance D in the figure is 2.22 m., What is inductive reactance per line in (ohm)? Figure 7 'O b 1.8D 2.4D 3.2D 0a) The conductor shown in the figure below is composed of five strands. The diameter of each strand is 2.5 mm. Find the GMR (Geometric mean radius) of the conductor. b) The distance between conductors of a single-phase line is 3 m. Each conductor is composed of five strands as shown above. Find the inductance of the line.
- Select the best transmission line from the following: Select one: a. Conductors with very low ohmic characteristics only. b. Conductors with very high ohmic characteristics and dielectrics with negligible conductivities. c. Conductors with very high conductivities and insulators with very small conductivities. d. Insulators with very small ohmic characteristics only. e. Insulators with very small conductivities only.A single core lead covered cable is to be designed for 68 kV(peak value) toearth. Its conductor diameter is 2 cm and its three insulating materials havepermittivities of 5, 4 and 3 respectively with the corresponding maximumsafe working stress of 38 kV/cm (r.m.s), 26 kV/cm (r.m.s) and 20 kV/cm(r.m.s) respectively. Find the minimum diameter of lead sheath.2.5 A 3-phase single circuit bundled conductor line with two sub-conductors per phase has horizontal spacing with 6.1 m between the centre lines of adjacent phases. The distance between the sub- conductors of each phase is 30.5 cm and each sub-conductor has a diameter of 2.54 cm. Find the inductance per phase per km. [0.988 mH]
- For the Figure 7 shown: A 251 -mile long, 60 Hz, three-phase, 3-wire, transmission line is composed of stranded conductors in each line with GMR of 0.3888 -inch. If the distance D in the figure is 7 ft., What is inductive reactance per line in (ohm)? Figure 7 ³0 1.8D 2.4D 3.2D12. There are 6 conductors in a double circuit line. Each conductor has a radius of 12 mm. The 6conductors are arranged horizontally. The center to center distance between the conductor is 2m. The sequence of conductors are from left to right as follows: a,b.c,a', b', c'. Calculate the inductance per km per phase of system. the a' 2 m 2 m 2 m 2 m 2 mQ2. A 3-phase, 132 KV, 50 Hz, 100 Km, single circuit bundle conductor transmission line as shown in the figure below. If the diameter of each strand is1 cm, and the conductors are regularly transposed. Determine, the capacitance to neutral per phase per Km . 6 m 5 m 0.18 m
- Find the inductive reactance per phase in ohms per mile, and the capacitativereactance to neutral in ohm-miles for a three-phase line that has three equilaterallyspaced conductors of ACSR Dove. The conductors are 10 feet apart, and the operating frequency is 60 Hz. The GMR of the Dove conductor is r0 = 0.0313 feet andthe radius of the Dove conductor is r = 0.4635 inches. (GMR stands for geometricmean radius and r0is the equivalent radius that is adjusted to account for the fluxlinked inside the wire in inductance calculations.Derive the equation of Capacitance per phase for the 3-phase double circuit line with hexagonal spacing. (transposition of conductors is not required)5. A coaxial cable, having an inner diameter of 0.025mm and using an insulator with dielectric constant of 2.56, is to have a characteristic impedance of 2000 2. What must be the outer conductor diameter?