- #1
fran1942
- 80
- 0
Hello, a beginners question here.
Can someone please tell me why transmission lines use two wires instead of just one ?
Can someone please tell me why transmission lines use two wires instead of just one ?
davenn said:Yes and no...
dont forget that there are were many transmission lines both power and communications
that used just 1 wire and an Earth return
Dave
SWER is a good choice for a distribution system when conventional return current wiring would cost more than SWER’s isolation transformers and small power losses. Power engineers experienced with both SWER and conventional power lines rate SWER as equally safe, more reliable, less costly, but with slightly lower efficiency than conventional lines.
A transmission line is a specialized type of electrical circuit that is used to transfer power or signals from one location to another. It is made up of two conductors that are separated by a dielectric material.
The two main types of transmission lines are balanced and unbalanced. Balanced lines have two conductors with equal currents flowing in opposite directions, while unbalanced lines have a single conductor with a return path through ground or a second conductor.
Transmission lines work by guiding electromagnetic waves, which carry the power or signals, along their length. The waves travel at the speed of light and are reflected at the ends of the line. The goal is to minimize the amount of reflection to ensure efficient transfer of power or signals.
The key parameters of a transmission line are impedance, capacitance, and inductance. Impedance is the measure of resistance to current flow, while capacitance is the ability to store electric charge, and inductance is the ability to store energy in a magnetic field.
Transmission lines are used in a variety of applications, including telecommunications, power distribution, and radio frequency systems. They are also commonly used in high-speed digital circuits to transfer data between components with minimal distortion.