Overhead Transmission line : Choice of Voltage, Types of conductors,
Inductance and Capacitance of single phase and three phase symmetrical and unsymmetrical
configurations, Bundle conductors, Transposition, Concept of GMD and GMR.
Overhead line construction: Line supports, Towers, Poles, Sag, Tension and Clearance, Effect of Wind
and Ice on Sag, Dampers.
Insulators: Types, string Insulator efficiency & methods of its improvement.
Corona: Principle of Corona formation, Critical disruptive voltage, Visual critical corona discharge
potential, Corona loss, advantages & disadvantages of Corona, methods of
reduction of Corona.
Underground Cables: Types of cables, capacitance of single core & 3 core cables, dielectric stress,
optimum cable thickness, grading, dielectric loss and loss angle.
Performance of lines: Short, medium (nominalΠ, T) and long lines and their representation. A, B, C, D
constants, voltage regulation, Ferranti Effect, Power Equations and line compensation, Power Circle
Diagrams.
Tariff : Guiding Principle of Tariff, different types of tariff.
Indian Electricity Rules-2003 – General Introduction.
Distribution System: Feeders and Distributors, radial and loop systems.
Distribution substation: Types of substations, Location of Substation, Substation — equipment and
accessories, Earthing of Substation.