Electrical Design of Overhead Lines

Capacitance of Three Phase Overhead Line

Capacitance of Three Phase Overhead Line: In a Capacitance of Three Phase Overhead Line, the capacitance of each conductor is considered instead of capacitance from conductor to conductor. Here, again two cases arise viz., symmetrical spacing and unsym­metrical spacing. 1.Symmetrical Spacing: Fig. 9.24 shows the three con­ductors A, B and C of the 3-phase overhead …

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Skin Effect in Transmission Lines

Skin Effect in Transmission Lines: Skin Effect in Transmission Lines – When a conductor is carrying steady direct current (d.c.), this current is uniformly distributed over the whole X-section of the conductor. However, an alternating current flowing through the conductor does not distribute uniformly, rather it has the tendency to concentrate near the surface of …

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Constants of a Transmission Line

Constants of a Transmission Line: A transmission line has resistance, inductance and capacitance uniformly distributed along the whole length of the line. Before we pass on to the methods of finding these Constants of a Transmission Line, it is profitable to understand them thoroughly. Resistance: It is the opposition of line conductors to current flow. The …

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