Proximity Effect
Proximity Effect occurs in high A.C. Voltage transmission lines. It occurs two or more overhead conductor due to flux linkages. When two or more conductor are in proximity, their electromagnetic field interact with each other, with the result that the current in each of them is redistributed such that the greater current density is concentrated in that part of the strand most remote from the interfering conductor. In each case, a reduced current rating results from the apparent increases of Resistance. Apart from the skin effect the non uniformity of the current distribution is also caused by proximity Effect.Proximity effect is more in case of power cables. Let's take a case, Two conductors; current flows in same direction: Fig. Current flow same direction We know that, Φ = LI It's mean flux is directly proportional to inductor. Inductive reactance (XL) = 2πfL We can write, L = XL / 2πf Now, we can says that, inductor is inversely proportiona...