JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Prerequisites

Mathematics

Course Objectives:

• To understand DC and Single & Three phase AC circuits
• To study and understand the different types of DC, AC machines and Transformers.
• To import the knowledge of various electrical installations and the concept of power, power factor and its improvement.

Course Outcomes

After learning the contents of this paper the student must be able to

• Understand and analyze basic Electrical circuits
• Study the working principles of Electrical Machines and Transformers
• Introduce components of Low Voltage Electrical Installations. Course Program Outcomes Objectives PO1 PO2 PO3 PO4 PO5 PO6 PO7 PO8 PO9 PO10 PO11 PO12 To understand 3 2 1 2 0 0 1 2 0 1 2 DC and Single & Three phase AC circuits. To study and 3 2 1 1 3 0 0 0 2 0 1 1 understand the different types of DC, AC machines and Transformers. To import the 3 2 0 3 0 0 0 1 2 1 1 knowledge of various electrical installations and the concept of power, power factor and its improvement. Course Program Outcomes Outcomes PO2 PO3 PO4 PO5 PO6 PO7 PO8 PO9 PO10 PO11 PO12 PO1 Understand and 3 2 1 0 1 0 0 0 2 0 2 2 analyse basic Electrical circuits Study the working 3 2 1 0 3 1 0 1 1 2 1 2 principles of Electrical Machines and Transformers Introduce 3 2 1 1 3 2 0 0 1 0 2 2 components of Low Voltage Electrical Installations.

UNIT - I

D.C. Circuits: Electrical circuit elements (R, L and C), voltage and current sources, KVL&KCL, analysis of simple circuits with dc excitation. Superposition, Thevenin and Norton Theorems. Time-domain analysis of first-order RL and RC circuits.

UNIT - II

A.C. Circuits: Representation of sinusoidal waveforms, peak and rms values, phasor representation, real power, reactive power, apparent power, power factor, Analysis of single-phase ac circuits consisting of R, L, C, RL, RC, RLC combinations (series and parallel), resonance in series R-L-C circuit. Three-phase balanced circuits, voltage and current relations in star and delta connections.

UNIT - III

Transformers: Ideal and practical transformer, equivalent circuit, losses in transformers, regulation and efficiency. Auto-transformer and three-phase transformer connections.

UNIT - IV

Electrical Machines: Construction and working principle of dc machine, performance characteristics of dc shunt machine. Generation of rotating magnetic field, Construction and working of a three-phase induction motor, Significance of torque-slip characteristics. Single-phase induction motor, Construction and working. Construction and working of synchronous generator.

UNIT - V

Electrical Installations: Components of LT Switchgear: Switch Fuse Unit (SFU), MCB, ELCB, MCCB, Types of Wires and Cables, Earthing. Types of Batteries, Important Characteristics for Batteries. Elementary calculations for energy consumption, power factor improvement and battery backup.

TEXT BOOKS:

• 1. D.P. Kothari and I. J. Nagrath, “Basic Electrical Engineering”, Tata McGraw Hill, 4th Edition, 2019.
• 2. MS Naidu and S Kamakshaiah, “Basic Electrical Engineering”, Tata McGraw Hill, 2nd Edition, 2008.

REFERENCE BOOKS:

• 1. P. Ramana, M. Suryakalavathi, G.T. Chandrasheker, “Basic Electrical Engineering”, S. Chand, 2nd Edition, 2019.
• 2. D. C. Kulshreshtha, “Basic Electrical Engineering”, McGraw Hill, 2009
• 3. M. S. Sukhija, T. K. Nagsarkar, “Basic Electrical and Electronics Engineering”, Oxford, 1st Edition, 2012.
• 4. Abhijit Chakrabarthi, Sudipta Debnath, Chandan Kumar Chanda, “Basic Electrical Engineering”, 2nd Edition, McGraw Hill, 2021.
• 5. L. S. Bobrow, “Fundamentals of Electrical Engineering”, Oxford University Press, 2011.
• 6. E. Hughes, “Electrical and Electronics Technology”, Pearson, 2010.
• 7. V. D. Toro, “Electrical Engineering Fundamentals”, Prentice Hall India, 1989