Electrical Technology Class 12 Syllabus

After successfully completing the two years of Senior Secondary Skill Course the student would have acquired relevant appropriate and adequate technical knowledge together with professional skills and competencies in the field of Electrical Technology so that he/she is properly equipped to take up gainful employment in this vocation.

Part B: Vocational Skills

  • Unit 1: A.C. Circuits
  • Unit 2: Single-Phase Transformer
  • Unit 3A: D.C. Motors
  • Unit 3B: Single Phase A.C. Motor
  • Unit 4: Three Phase Induction Motors
  • Unit 5: Measuring Instruments - II
  • Unit 6: Electrical appliances

1. A.C Circuits

Generation of A.C. voltage, its generation and wave shape. Cycle, frequency, peak value (maximum value), average value, instantaneous value , R.M.S. value, form factor, crest factor, phase, phase difference, power and power factor, A.C.

Series Circuits with (i) resistance and inductance (ii) resistance and capacitance and (iii) resistance inductance and capacitance, Q factor of R.L.C. series circuits.

2. Single-Phase Transformer

Types of transformer - step-up and step-down transformer, voltage and current transformer, auto-transformer. Construction, working principles and applications of different types of transformers, rewinding of transformers, cooling of transformers. Safety measures precautions from operational point of view.

3A. D.C. Motors

Types of motor - series, shunt, compound and universal, construction, working principles, characteristics, winding details and applications of different types of motors including fractional horse power, starting and starters for D.C. motors. Installation of D.C. motor.

3B. Single Phase A.C. Motor

Types of A.C. Motors - induction motor (Split phase and repulsion start), capacitor motor, shaded pole motor, universal motor, construction, working principles, special characteristics, winding details and applications of different types of fractional horse power motors. Starting and starters for different motors.

4. Three Phase Induction Motors

Principle, working & starting of three phase induction motor.

5. Measuring Instruments - II

Induction type Energy meter analog multi meter, digital multi meter, dynamometer type wattmeter- their circuit connection & application for measurement, operation & application

6. Electrical appliances

(i) Immersion Heater and Geyser: Construction, working principle and use of immersion heater. Common faults - their causes, testing and repairs. Construction, working principles and use of geyser and thermostat, common defects, their causes, testing and repairs. Testing and installation of geyser. Precautions in using immersion heater and geyser.

(ii) Electric Mixer, Grinder and Blender: Construction, working principles, characteristics and applications of electric mixer, grinder and blender. Common faults, their causes, testing and repairs, servicing, maintenance and over.

(iii) Room Cooler: Construction and working details of room cooler, desert cooler, Common cooler faults, their causes, testing and repair, Installation of room cooler/desert cooler.

(iv) Electric Motor Used in Domestic Appliances: Split phase, capacitor start, capacitor-run, shaded-pole motors, two speed motors, reverse motors, universal motors, components testing, trouble shooting, and servicing.

(v) Basic Occupational and Safety Practices: Safety signs, lighting and handling loads, moving heavy equipments, Electrical safety- safety practices- first aid, Practice safe methods- lifting and handling of heavy objects, Rescue a person from live wire, Artificial respiration- Nelson’s arm and Schafer’s Method.