ELECTRICAL ENGINEERING

Course Description:

The laboratory facilitates the students to deal with electrical instruments which further strengthen the

concepts & operation of various AC & DC circuits, and machines, and their characteristics. The lab

also reinforce the concepts discussed in class with a hands-on approach which enable the students to

gain significant experience with electrical instruments such as ammeter, voltmeter, digital

multimeters, oscilloscopes, tachometer, switches, fuses and power supplies.

Course Objectives:

1. To provide hands on experience in setting up simple electrical circuits (DC and AC).

2. To get exposure to handle different electrical equipment’s.

3. To measure various electrical parameters with different measuring instruments.

4. To get hands on experience in operating DC and AC machines.

5. To understand the operation of basic converters and various components of LT Switchgear.

LIST OF LABORATORY EXPERIMENTS/DEMONSTRATIONS:

DEMONSTRATIONS:

1. Basic safety precautions. Introduction and use of measuring instruments – voltmeter, ammeter,

multi-meter, oscilloscope. Study of passive components – resistors, capacitors and inductors.

2. Demonstration of voltage and current relationships (line-line voltage, phase-to-neutral voltage,

line and phase currents). In star and delta connections.

3. Demonstration of cutout sections of transformer and DC & AC machines.

4. Demonstration of induction machine. Motor operation and generator operation of an induction

machine driven at super-synchronous speed.

5. Familiarization of (i) different types of cables/wires and switches and their uses, (ii) different

types of fuses & fuse carriers; MCB, ELCB, MCCB their ratings and uses (components of LT

switchgear).

EXPERIMENTS:

1. Wiring of a simple circuit for controlling (1) a lamp/fan point, (2) Staircase or Corridor Winding.

2. Wiring of a power circuit for controlling an electrical appliance (16A Socket).

3. Verification of Kirchhoff’s current and voltage laws (KCL & KVL).

4. Verification of superposition theorem

5. Sinusoidal steady state response of R-L, and R-C circuits (impedance calculation and verification).

6. Measurement of voltage, current and power in a single phase circuit using voltmeter, ammeter and

wattmeter. Also, calculate the power factor of the circuit.

7. Measurement of active power for star and delta connected balanced loads (single wattmeter

method).

8. Open-circuit and short-circuit test on a single phase transformer.

9. Speed control of separately excited DC motor.

10. Wiring of a power distribution arrangement using single phase MCB distribution board with

ELCB, main switch and energy meter (or residential house wiring).

11. Regulated power supply for generating a constant DC Voltage.

12. Fabrication of a given electronic circuit on a PCB and test the same.

Course Outcomes:

Upon successful completion of the course, the students are expected to

1. Get an exposure to common electrical components and their ratings.

2. Make electrical connections by wires of appropriate ratings.

3. Understand the usage of common electrical measuring instruments.

4. Understand the basic characteristics of transformers and electrical machines.

5. Get an exposure to the working of various power electronic converters.