15.3 Determine the erection sag and tension of a transmission line at 65°C in still air. The line has aspan of 300 m. ACSR conductor has the following data: Area - 240 mm2; overall diameter -20 mm , weight = 1.0 kg/m; ultimate strength = 8000 kg; coefficient of linear expansion = 18.44 x10-5mC; modulus of elasticity = 9320 kg/mm2. Also assume radial thickness of ice is 1.0 cm and awind pressure 40 kg/m2 of projected area and a temperature of -5°C as the worst condition.Ans: 20.76 m; 541.9 kg.Weight of the ice is 910 kg/m3 and factor of safety - 2.0.

Answered: 15.3 Determine the erection sag and…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

See similar textbooks

Similar questions

A 3 –phase 50 HZ transmission line have conductors of sections 90 mm2 and effective diameter of 1cm and are placed at the vertices of an equilateral triangle of side 1metre. The line is 20 km long and delivers a load of 10MW at 33kV and p.f 0.8. Neglect capacitance and assume temperature of 20 oC. Determine the efficiency and the regulation of the line
Estimate the corona loss for a 3-phase, 110 kV, 50 Hz, 150-km-long transmission line consisting of three conductors, each of 10 mm diameter and spaced 2.5 m apart in an equilateral triangle formation. The temperature of the air is 30oC and the atmospheric pressure is 750 mm of mercury. Take the irregularity factor as 0.85. Ionisation of the air may be assumed to take place at a max voltage gradient of 30 kV/cm.
A very low-loss microstrip transmission line has the following per unit length parameters: R = 2 Ω/m, L = 80 nH/m, C = 200 pF/m, and G = 1 µS/m. (a) What is the characteristic impedance of the line if loss is ignored? (b) What is the attenuation constant due to conductor loss? (c) What is the attenuation constant due to dielectric loss?
.A 3-phase, 220 k 50Hz transmission line consists of 1.5 cm radius conductor spaced 2 metres apart in equilateral triangular formation. If the temperature is 40°C and atmospheric pressure is 76 cm, calculate the corona loss per km of the line. Take m = 0.85
It is desired to construct uniform transmission lines using polyethylene (εr = 2.25) as the dielectric medium. Assuming negligible losses, find the inner radius of the outer conductor (in mm) for a 76 Ω coaxial line, where the radius of the center conductor is 0.6 (mm).
A transmission line has an inductance of 4 mH/loop km and a capacitance of 0.004µF/km. Determine, for a frequency of operation of 1 kHz, the phase delay, the wavelength on the line, and the velocity of propagation (in metres per second) of the
Three phase, 260 kV, 50 Hz transmission line consists of 3.2 cm diameter conductor spaced 0.002 km apart in equilateral triangular formation. If the temperature is 35°C and atmospheric pressure is 76 cm, calculate the corona loss per km of the line. Assume mo =0-85.
A 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.
A Three-Phase, 180 KV, 75 Hz Transmission Line consists of 1.2 cm radius conductors spaced at 2.4 meters apart in an equilateral triangular formation. If the Temperature is 40 ºC and Atmospheric Pressure is 76 cm of Hg, calculate the Corona Loss per km of the line. Take m0=0.8
1. What is the necessary condition for matching transmission lines? In addition, what is a micro strip line? 2. For a distortion less line α = 0.02dB/m, Z0 (R0) = 60Ω and C = 0.2nF/m. Find the resistance and velocity of wave propagation. [Do not forget the units.] 3. For a finite lossless transmission line with open-circuit termination, sketch Xio vs l. Indicate where the sketch is inductive and capacitive.
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
A lossless coaxial cable transmission line has L = 200 uH/ft and C = 100 nF/ft. The inner diameter of the outer conductor is 3cm and the diameter of the inner conductor is 1cm. What is the dielectric constant of the insulator?

SEE MORE QUESTIONS

Recommended textbooks for you

Introductory Circuit Analysis (13th Edition)

Electrical Engineering

ISBN:

9780133923605

Author:

Robert L. Boylestad

Publisher:

PEARSON

Delmar's Standard Textbook Of Electricity

Electrical Engineering

ISBN:

9781337900348

Author:

Stephen L. Herman

Publisher:

Cengage Learning

Programmable Logic Controllers

Electrical Engineering

ISBN:

9780073373843

Author:

Frank D. Petruzella

Publisher:

McGraw-Hill Education

Introductory Circuit Analysis (13th Edition)

Electrical Engineering

ISBN:

9780133923605

Author:

Robert L. Boylestad

Publisher:

PEARSON

Delmar's Standard Textbook Of Electricity

Electrical Engineering

ISBN:

9781337900348

Author:

Stephen L. Herman

Publisher:

Cengage Learning

Programmable Logic Controllers

Electrical Engineering

ISBN:

9780073373843

Author:

Frank D. Petruzella

Publisher:

McGraw-Hill Education

Fundamentals of Electric Circuits

Electrical Engineering

ISBN:

9780078028229

Author:

Charles K Alexander, Matthew Sadiku

Publisher:

McGraw-Hill Education

Electric Circuits. (11th Edition)

Electrical Engineering

ISBN:

9780134746968

Author:

James W. Nilsson, Susan Riedel

Publisher:

PEARSON

Engineering Electromagnetics

Electrical Engineering

ISBN:

9780078028151

Author:

Hayt, William H. (william Hart), Jr, BUCK, John A.

Publisher:

Mcgraw-hill Education,

SEE MORE TEXTBOOKS