Unbalanced loads are connected to a balanced three-phase four-wire 50 Hz 400 V supply in star configuration. The symmetrical components, lo, ₁ and /₂, of unbalanced line currents are given as: :10.51-176.13° A /1: 20.66210.88° A 12: 9.962-18.62° A Assume that the transmission line has negligible impedance. Calculate: (i) The line currents. (ii) The resistance and inductance (or capacitance) of each load, Za, Zb and Zc.

Consider the 500 kV, three phase bundled conductor line as shown in the figure below. Find the line to neutral capacitance. 0.5 m 30 mm (0) (O to Ine 15 m 15 m

Which termination would result to a phase change of 180 degrees at the load if Zo = 100 ohm? a. 50 ohm b. short circuit c. 75 ohm d. all of these What is the purpose of impedance matching? a. maximum return loss b. maximum SWR c. maximum load power d. maximum reflection A short piece of transmission line that may be open or shorted and used for impedance matching purposes. a. converter b. decoder c. stub d. transformer

The VSWR on an 50-Ohm transmission line is 5. The distance between successive voltageminima is 80 cm while the distance from the load to the first minimum is 30 cm. What are thereflection coefficient and load impedance

A three phase 60 Hz transmission line delivers 750 KW at 95% leading power factor and at delta voltage of 6,900 volts. The resistance per conductor is 4.3 ohms and the reactance per conductor is 2.6 ohms. Assuming both source and load are wye connected, what is the load impedance per phase? A. 69 ohms B. 64.5 ohms C. 72.2 ohms D. 60.27 ohms

One circuit of a single-phase transmission line is composed of three solid 0.12" radius wires. The return circuit is composed of two 0.15" radius wires. Find the inductance of the complete line in mH/mi. The distance between wires are 40" horizontally and 25" vertically. A. 2.54 mH/mi B. 2.478 mH/mi C. 2.488 mH/mi D. 2.567 mH/mi Provide Clear Explaination

H. W.: A 3-phase overhead transmission line is being supported by three disc insulators. The potentials across top unit and middle unit are 9 kV and 11 kV respectively. Calculate: oiznoga to gnine A: olqmzd a. The ratio of capacitance between pin and earth to the mutual capacitance of each unit.iu one 2200 utlor oh bnft.9oNDilonge b. The line voltage. c. String efficiency.

Which of the following combinations comprise the Transmission Line Impedance? O A. Conductance and Capacitive Reactance in Parallel O B. Conductance and Inductive Reactance in Parallel O C. Resistance and Inductive Reactance in Series O D. Resistance and Capacitive Reactance in Series

of stion 4 A single phase transmission line is delivering 450 kVA load at 12 kV. Its resistance is 4.5 2 and inductive reactance is 6 2. If the load power factor is 0.9 lagging. Determine the Current through the line Sending end voltage Sending end power factor Regulation of transmission line Efficiency of transmission line A load of 120 MW at a power factor of 0.8 lagging can be delivered by a 3-phase transmission line. The voltage at the intained at 33 kV and the loss in the transmission as 7.5 % of the power delivered. (Consider

If a 3-phase short circuit occurs in one of the two circuit of transmission line at point F, and the shunt impedance of the short circuit is j0.1 pu. Determine the maximum time when a short circuit can still be cleared. So=0.8+j0.3 Xd'= 0.2, XL1=XL2= 0.6, XT1=0.12, Xr2= 0.1, L1 V= 1.0 T1 L2 F T2 .XL= 0.1 Хс- 0.1. S1 S2 SL= 0.6+j0.3