Electrical Technology

Electrical Energy is used in Industry for various job and operations including Illumination, Electroplating Heating and Ventilation and Locomotives etc. This course will give an understanding of the principles and practices related to efficient and safe industrial use of electrical energy in some of the selected fields.

1 ILLUMINATION.                                                                          18 Hrs.
1.1 Modern theory of light and radiation from hot body.
1.2 Terms; black-body: like hot body, solid angle,
1.3 Law’s of illumination: inverse square law, Lambert’s cosine law.
1.4 Depreciation factor, utilization factor, waste light factor.
1.5 Lighting scheme and its design.
1.6 Lamps, shades and reflectors.
1.7 Flood lighting and its purpose and arrangements.
1.8 Sources of light (Natural and artificial).
1.9 Incandescent lamps, gas filled, clear and frosted glass lamps.
1.10 Discharge lamps, sodium vapour, high pressure mercury vapour.
1.11 Fluorescent lamps, stroboscopic effect.
2 ELECTRO PLATING.                                                                    10 Hrs.
2.1 Fundamental principles of chemistry and metallurgy relating to electroplating.
2.2 Introduction to electro plating.
2.3 Properties of metals, acids, alkalies and neutralization.
2.4 Faraday’s law of Electrolysis.
2.5 Electrolytic cell, Electrodes, electrolytes and polarization.
2.6 Acid used in electroplating H2SO4, HNO3, HCL, aqua-regia (Nitro-Hydrochloric acid).
2.7 Salts used in electroplating.
2.8 Alkalies used in electroplating.
2.9 Electroplating plants, electroplating tank, Electrical supply system.
2.10 Rheostatic current control in electroplating.
2.11 Electroplating process.
2.12 Cleaning of objects mechanically and chemically.
2.13 Copper and silver plating.
2.14 Current densities for various thicknesses and materials of jobs.
2.15 Planning of electroplating shop.

3 REFRIGERATION.                                                                      10 Hrs.
3.1 Introduction to refrigeration and air conditioning.
3.2 Types of refrigeration and refrigerants.
3.3 Refrigeration process / cycle.
3.4 Refrigeration components (Evaporator, compressor, condenser etc.)
3.5 Electrical accessories and circuits of a refrigerator.

3.6 Introduction to air conditioning.
3.7 Types of domestic air conditioners and their capacities: window, split.
3.8 Electrical accessories and circuit for air conditioner.
3.9 Introduction to commercial air-conditioning (chiller plants and central air-conditioning system)
4 ELECTRIC TRACTION.                                                               18 Hrs.
4.1 Introduction to Electric Traction, its advantages and disadvantages.
4.2 Systems of electric traction
4.3 Electrification systems of Electric Traction.
4.4 Motors used for electric traction.
4.5 D.C. series motors, its characteristics.
4.6 Single phase A.C. motors
4.7 3-phase induction motors.
4.8 Starting and speed control of traction motor, series parallel control.
4.9 Drum type controllers.
4.10 Field weakening and tapped field control.
4.11 Electric braking, plugging rheostatic, regenerative.
4.12 Trolley bus control equipment, master controllers.
4.13 Overhead feeding and distributing equipment, trolley wires, trolley wheels, frogs, pantograph.
4.14 Current collectors – trolley collector, BOW collector, pantograph collector.
4.15 Introduction to booster, negative booster.
5 ELECTRIC HEATING.                                                                 8 Hrs.
5.1 Introduction to Electric Heating, advantages and its application.
5.2 Types of electric heating, power frequency heating, high frequency heating.
5.3 Resistance heating and its types, Resistance furnaces.
5.4 Arc heating and its types, Arc furnaces.
5.5 Induction heating and its types, induction furnaces.
5.6 Die electric heating.
5.7 Infra-red heating.
5.8 Eddy current heating.
5.9 Review of electric welding, spot welding

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