WITH EFFECT FROM THE ACADEMIC YEAR 2011 - 2012
EE 271
ELECTRICALTECHNOLOGY&
MECHANICAL TECHNOLOGY
PART – A: ELECTRICAL TECHNOLOGY
Instruction 3 Periods per week
Duration of University Examination 1.5 Hours
University Examination 38 Marks
Sessional 12 Marks
Unit-I
DC Circuits: Ohm’s law, Kirchoff’s laws, Resistance network, Series, parallel and series - parallel circuits with dc sources, Power loss in resistive elements, Alternating Currents : Principles of production of ac waveform, frequency, Effective value and form factor, Effective values of current and voltage, Vector representation, Behaviour of pure inductance, capacitance and resistance with sinusoidal sources, Impedance and power factor, simple ac network with R, L & C elements under steady-state, Three - Phase circuits under balanced conditions, Star-delta connections, Power in balanced three-phase circuit.
Unit-II
Transformers: Ideal transformers, Principle of transformation, Working of actual transformer under no-load and load conditions, approximate equivalent circuit, Open circuit & Short circuit tests, Regulation and efficiency.
Unit-III
Induction Motors: Types of Induction motors, Production of rotating magnetic field, Synchronous speed, Torque production, Slip and speed of motor, Slip-torque characteristics, starting of induction motors, Applications of induction motors. Illumination: Units of light measurement, Coefficient of utilization and depreciation, Polar curves, Calculations of street lighting.
Suggested Reading:
- 1.J.B. Gupta, Fundamentals of Electrical Engineering, S.K. Kataria & Sons, 2002.
- 2.V.K. Mehta, Principles of Electrical Engineering, S.Chand & Co., 1995.