What is the resistance of transmission line?
Typical values of Z0 are 50 or 75 ohms for a coaxial cable, about 100 ohms for a twisted pair of wires, and about 300 ohms for a common type of untwisted pair used in radio transmission.
What is the effect of resistance in transmission line?
The main effect will be on the resistance of the line. Due to the skin effect, the conductor depth in which current can pass through, decreases with increase in frequency. As a result the line has higher resistance, and therefore higher losses, for higher frequencies.
What is stringing of conductors in transmission line?
Transmission lines Conductor and earth-wires shall be strung and paid out by the use of the Tension Method. In this method, the conductor shall be kept under tension during the paying out process. This method shall keep the conductor clear off the ground and obstacles which might cause conductor surface damage.
Why resistance is neglected in transmission line?
The distances between conductors of transmission lines are big. The distances between conductors of cables in distribution systems are very small and their conductor square could be equal to that of transmission lines. Therefore the inductivity is small also and the ratio R/X is bigger than that of transmission lines.
What is DC and AC resistance of transmission line and elaborate the effect of temperature on transmission line?
So AC resistance of conductor is more than the DC resistance. Temperature is another factor that influences the resistance of conductor. The resistance varies linearly with temperature, as temperature increases length of line increases then resistance increases.
What is string chart?
In graph theory, a string graph is an intersection graph of curves in the plane; each curve is called a “string”.
Which line parameter is most significant for transmission line?
Capacitance is negligible in short transmission lines whereas in long transmission; it is the most important parameter. It affects the efficiency, voltage regulation, power factor and stability of the system.