Group A
Review of basic concepts in electrostatics
and magnetostatics, Basic laws due to Ohm, Coulomb, Faraday, Ampere and
Kirchhoff, Network parameters and theorems, Superposition theorem, Thevenin and
Norton’s Theorems, Network analysis, Steady state response of circuits to
sinusoidal functions. Power and power factor. Phasor representation of
sinusoidal complex impedances. Resonance. Magnetic field calculations.
Magnetization curves. Magnetic circuits concepts and calculation. Hysteresis
and eddy current losses. Relays.
Polyphase circuits-Three-phase supply
systems. Phase sequence. Balanced threephase circuits. Star and delta connected
loads. Unbalanced three-phase circuits.
Symmetrical components. Power
measurement in three-phase circuits. Active and reactive power. Power factor
improvement.
Group B
Elements of power distribution.
d.c.2-wire, 3 wire distributions. a.c. 3-wire and 4-wire distributions. Radial
and ring main distributions. Current loading and voltage profile in distributions.
Comparison of copper efficiencies in different systems of distribution.
Power transformers, theory of
operation, phasor diagram, equivalent circuit. Efficiency and regulation.
Principles of energy conversion; Basic
concepts of rotating machines, torque and emf; d.c. machines, characteristics
of series, shunt and compound motors and generators.
Basic principles of operation of
synchronous and induction machines. Starting of induction motors. Regulation of
synchronous generator by synchronous impedance method. Single-phase induction
and commutator machines.
