Fundamentals of Electrical Engineering

Unit I

DC Circuits: Electrical circuit elements (R, L and C), Active and passive elements, Voltage and current sources, Concept of linearity, unilateral and bilateral elements, Kirchhoff's laws, Mesh and nodal methods of analysis.

Unit II

Steady State Analysis of Single Phase AC Circuits: Representation of sinusoidal waveforms — average and effective values, form and peak factors. Analysis of single phase AC circuits with R-L-C combinations (series and parallel), Apparent, active & reactive power, Power factor, Resonance in series & parallel circuits, Bandwidth and quality factor. Three phase balanced circuits, Voltage and current relations in star and delta connections.

Unit III

Transformers: Magnetic circuits, Ideal and practical transformer, Equivalent circuit, Losses in transformers, Regulation and efficiency.

Unit IV

Electrical Machines: DC machines — principle, construction, types, EMF equation of generator and torque equation of motor, applications of DC motors. Three Phase Induction Motor — principle, construction, types, slip-torque characteristics, applications. Single Phase Induction Motor — principle of operation and methods of starting. Three Phase Synchronous Machines — principle of operation of alternator and synchronous motor and their applications.

Unit V

Electrical Installations: Switch Fuse Unit (SFU), MCB, ELCB, MCCB, ACB, Types of wires, cables and bus-bars, Fundamentals of earthing and lightning protection, Types of batteries.