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A two-wire air line has the following line parameters:
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Fundamentals of Applied Electromagnetics (7th Edition)
- Geometric mean radius of a 3-phase transmission line of 422 kV, 220 km length 22 mm dir. The roughness factor of the conductor is 0.82 and the geometric mean length between phases is 11 m. Air pressure along the line is 720 mm Hg and the temperature is 22 ° C. In this transmission line; a) - Calculate the corona voltage and the voltage at which ionization begins with impingement particles. b) - Find the total corona loss in the three phase system for the operating voltage with the Peek formula c) - Find the total corona loss for 1% increase in operating voltage.arrow_forwardA microstrip line is composed of zero thickness copper conductors on a substrate having εr = 8.4, tan = 0.0005 and thickness 1.5 mm. if the line width is 0.5 mm,and operated at 6Ghz, determine the characteristic impedance.arrow_forwardA Three-Phase, 50 Hz, 220 KV Transmission Line consists of conductors of 1.2 cm radius spaced 2 meters at the corners of an equilateral triangle. Calculate the Corona Power Loss per km of the line at a Temperature of 20ºC and Barometric Pressure of 72.2 cm of Hg. Take the Surface Factor of the conductor as 0.96arrow_forward
- 3-phase line has conductors 4 cm in diameter spaced equilaterally 2 m apart. If the dielectric strength of air is 29 kV (max) per cm, find the disruptive critical voltage for the line. Take air density factor =0.952 and irregularity factor mo = 0.9.arrow_forwardA parallel-wire transmission line has separation between conductors equal to four times the conductor diameter. If the dielectric material separating the two conductors is Foam Polystyrene with a velocity factor equal to 0.91, what is the characteristic impedance of the transmission line?arrow_forwardA. A single-phase transmission line is composed of two solid round conductors having aradius of 0.45cm each. If the conductors are spaced 3.5m, calculatea. the value of the inductance per conductorb. the inductance of the lineB. A 15-km, 60Hz, single phase transmission line consists of two solid conductors, eachhaving a diameter of 0.8cm. If the distance between conductors is 1.25m, determine theinductance and reactance of the line.arrow_forward
- A 3-phase line has conductors 6 cm in diameter spaced equilaterally 3 m apart. If the dielectric strength of air is 30 kV (max) per cm, find the disruptive critical voltage for the line. Take air density factor δ = 0.952 and irregularity factor m = 0.8.arrow_forwardGeometric mean radius of a 400 kV, 300 km long three-phase transmission line 20 mm. The roughness factor of the conductor is 0.82 and the geometric mean interphase length is 10 m. The air pressure along the line is 760 mm Hg and the temperature is 23 °C. In this transmission line; a)- Calculate the voltage at which ionization starts due to impact and the corona voltage. b)- Find the total corona loss in the three-phase system for the operating voltage with the Peek formula. c)- Find the total corona loss for the 10% increase in the operating voltage.arrow_forwardA 60-ohm distortionless transmission line has a capacitance of 0.15nF/m. The attenuation of the line 1.15*10-3 Np/m. Calculate: (i) The line parameter resistance, inductance and conductance per meter of the line, (ii) Voltage at a distance of 1Kmand 4Km with respect to sending voltage.arrow_forward
- A single-phase transmission line is composed of two solid round conductors having aradius of 0.45cm each. If the conductors are spaced 3.5m, calculatea. the value of the inductance per conductorb. the inductance of the linearrow_forwardQI/ A lossless coaxial cable of 170 mm long has the parameters L 245 nH/m and C 200 pF/m. The operating frequency is f 1GHz and the line is terminated by ZL 100 ome, determine: A) The characteristic impedance .B) The input impedance at the input terminals of the line. C) The standing wave ratio on the line.arrow_forwardA lossless transmission line is 50 cm in length and operates at a frequency of 100 MHz. The line parameters are L = 0.2μH/m and C = 80 pF/m. The line is terminated by a load ZL = 50 + j20 Ω. Determine the: (a) reflection coefficient ; (b) SWR ; (c) the input impedance of the line. (d) What average power is delivered to ZL if the input voltage is 100 V?arrow_forward
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